Photo of Robert Rioux

Robert Rioux

Friedrich G. Helfferich Professor of Chemical Engineering & Associate Department Head


  • Chemical Engineering

22A Chemical and Biomedical Engineering Building


Personal or Departmental Website

Google Scholar Profile

Research Areas:

Energy and Environment; Interfaces and Surfaces

Interest Areas:

Chemical Catalysts: Heterogeneous catalysis, catalyst design and synthesis, time-resolved FTIR spectroscopy of condensed systems, x-ray absorption spectroscopy (EXAFS, XANES), reaction mechanisms in nanoscale systems, photocatalysis.






  • Robert M Rioux, 2010, Model Systems in Catalysis: Single Crystals to Supported Enzyme Mimics, Springer, pp. 526

Book Reviews

  • Robert M Rioux, 2009, Design of Heterogeneous Catalysts: New Approaches based on Synthesis, Characterization and Modeling, pp. p. 6196

Journal Articles

  • Ji Woong Chang, Yanyu Mu, Antonios Armaou and Robert M Rioux, 2023, "Direct Determination of High-Affinity Binding Constants by Continuous Injection Isothermal Titration Calorimetry", Journal of Physical Chemistry B, 127, (50), pp. 10833-10842
  • Akbar Mahdavi-Shakib, Todd N Whittaker, Tae Yong Yun, K. B. Sravan Kumar, Lauren C Rich, Shengguang Wang, Robert M Rioux, Lars Grabow and Bert D Chandler, 2023, "The role of surface hydroxyls in the entropy-driven adsorption and spillover of H2 on Au/TiO2 catalysts", Nature Catalysis, 6, (8), pp. 710-719
  • Haoran He, Griffin A Canning, Angela Nguyen, Anish Dasgupta, Randall J Meyer, Robert M Rioux and Michael J Janik, 2023, "Active-site isolation in intermetallics enables precise identification of elementary reaction kinetics during olefin hydrogenation", Nature Catalysis, 6, (7), pp. 596-605
  • Robert M Rioux, 2021, "Catalyst design for selective hydrogenation of benzene to cyclohexene through density functional theory and micro-kinetic modeling", ACS Catalysis, 11, pp. 11831-11842
  • Robert M Rioux, 2021, "Factors controlling the molecular modification of one-dimensional zeolites", Physical Chemistry Chemical Physics, 11, pp. 18610-18617
  • Robert M Rioux, 2021, "Continuous-injection isothermal titration calorimetry for in-situ evaluation of thermodynamic binding properties of ligand-receptor binding models", Journal of Physical Chemistry B, 125, (29), pp. 8075–8087
  • Robert M Rioux, 2021, "Solvent Dependent Impact of Spectator Anions on the Thermodynamics of Cation Exchange in CdSe Nanocrystals", Journal of Physical Chemistry C, 125, (23), pp. 12792–12801
  • Robert M Rioux, 2021, "Catalytic influence of light element incorporation in the lattice of palladium", Catalysis Today, (371), pp. 29-39
  • Robert M Rioux, 2021, "Understanding the Solution-Phase Growth of Cu and Ag Nanowires and Nanocubes from First Principles", Langmuir, 37, (15), pp. 4419–4431
  • Robert M Rioux, 2021, "Kinetics of H2 Adsorption at the Metal–Support Interface of Au/TiO2 Catalysts Probed by Broad Background IR Absorbance", Angewandte Chemie, 60, (14), pp. 7735-7743
  • Robert M Ri andux, , 2021, "Ring-opening and hydrodenitrogenation of indole under hydrothermal conditions over Ni, Pt, Ru and Ni-Ru bimetallic catalysts", Chemical Engineering Science, 406, (126853), pp. 14
  • Robert M Rioux, 2021, "Surface-functionalized Boron Nanoparticles with Reduced Oxide Content by Non-thermal Plasma Processing for Nanoenergetic Applications", ACS Applied Materials and Interfaces, 13, pp. 6844-6855
  • Robert M Rioux, 2021, "Chemical Identity of Poly(N-vinylpyrrolidone) End Groups Impact Shape Evolution during the Synthesis of Ag Nanostructures", Journal of the American Chemical Society, 143, pp. 184-195
  • Robert M Rioux, 2020, "Diffusion Doping of Cobalt in Rod-shape Anatase TiO2 Nanocrystals Leads to Antiferromagnetism", Nanoscale Advances, 2, pp. 4853-4862
  • Robert M Rioux, 2020, "Enhancement of Alkyne Semi-Hydrogenation Selectivity by Electronic Modification of Platinum", ACS Catalysis, 10, pp. 6763-6770
  • Linxi Wang, Shyam Deo, Kerry Dooley, Michael J Janik and Robert M Rioux, 2020, "Influence of metal nuclearity and physicochemical properties of ceria on the oxidation of carbon monoxide", Chinese Journal of Catalysis, 41, (6), pp. 951-962
  • Yunwen Zhou, Yanyu Mu, Ming-Feng Hsieh, Bernd Kabius, Carlos N Pacheco, Carol Bator, Robert M Rioux and Jeffrey D Rimer, 2020, "Enhanced Surface Activity of MWW Zeolite Nanosheets Prepared via a One Step Synthesis", Journal of the American Chemical Society, 142, pp. 8211-8222
  • James E Bruno, Nicolas S Dwarica, Emily R Hand, Clemente S Guzman IV, Anish Dasgupta, Zhifeng Chen, Robert M Rioux and Bert D Chandler, 2020, "Supported Ni–Au Colloid Precursors for Active, Selective, and Stable Alkyne Partial Hydrogenation Catalysts", ACS Catalysis, 10, (4), pp. 2565-2580
  • Shelton JP Varapragasam, Shahzahan Mia, Carly Wieting, Choumini Balasanthiran, Md Yeathad Hossan, Aravind Baride, Robert M Rioux and James D Hoefelmeyer, 2019, "Ag/TiO2 hybrid nanoparticles as active photocatalyst for hydrogen evolution", 2, (11), pp. 8274-8282
  • Linxi Wang, Mohammed Al-Aufi, Carlos N Pacheco, Liyuan Xie and Robert M Rioux, 2019, "Increased amine efficiency with simultaneous decreased heat of sorption of CO2 to blended polyethyleneglycol (PEG)/polyethylenimine(PEI) impregnated silica", 7, (17), pp. 14785-14795
  • Anish Dasgupta, Eric K Zimmerer, Randall E Meyer and Robert M Rioux, 2019, "Generalized approach for the synthesis of silica supported Pd-Zn, Cu-Zn and Ni-Zn gamma brass phase nanoparticles", 334, pp. 231-242
  • Aaron Garg, Danielle S Gonçalves, Yusu Liu, Zhenshu Wang, Linxi Wang, Jong Suk Yoo, Alexie Kolpak, Robert M Rioux, Daniela Zanchet and Yuriy Roman-Leshkov, 2019, "Impact of Transition Metal Carbide and Nitride Supports on the Electronic Structure of Thin Platinum Overlayers", 9, (8), pp. 7090-7098
  • Anish Dasgupta and Robert M Rioux, 2019, "Intermetallics in Catalysis: An Exciting Subset of Multimetallic Catalysts", Catalysis Today, 330, pp. 2-15
  • Haoran He, Anish Dasgupta, Robert M Rioux, Randall J Meyer and Michael J Janik, 2019, "Competitive Hydrogenation between Linear Alkenes and Aromatics on Close-Packed Late Transition Metal Surfaces", 123, (13), pp. 8370-8378
  • James E Bruno, K. B. Sravan Kumar, Nicolas S Dwarica, Alexander Huther, Zhifeng Chen, Clemente S Guzman IV, Emily R Hand, William C Moore, Robert M Rioux, Lars C Grabow and Bert D Chandler, 2019, "On the Limited Role of Electronic Support Effects in Selective Alkyne Hydrogenation: A Kinetic Study of Au/MOx Catalysts Prepared from Oleylamine-Capped Colloidal Nanoparticles", 6, (11), pp. 1650-1664
  • Zhifeng Chen, Ji Woong Chang, Choumini Balasanthiran, Scott T Milner and Robert M Rioux, 2019, "Anisotropic Growth of Silver Nanoparticles Is Kinetically Controlled by Polyvinylpyrrolidone Binding", 141, (10), pp. 4328-4337
  • Max A Mellmer, Chotitath Sanpitakseree, Benginur Demir, Kaiwen Ma, William A Elliott, Peng Bai, Robert L Johnson, Theodore W Walker, Brent H Shanks, Robert M Rioux, Matthew Neurock, James A Dume andic, , 2019, "Effects of chloride ions in acid-catalyzed biomass dehydration reactions in polar aprotic solvents", 10, pp. 1132
  • Zhifeng Chen, Tonnam Balankura, Kristen A Fichthorn and Robert M Rioux, 2019, "Revisiting the Polyol Synthesis of Silver Nanostructures: Role of Chloride in Nanocube Formation", 13, (2), pp. 1849-1860
  • Yang Guo, Zhifeng Chen, Robert M Rioux and Phillip Savage, 2019, "Hydrothermal reaction of tryptophan over Ni-based bimetallic catalysts", 143, pp. 336-345
  • Linxi Wang, Seyed Mehdi Kamali Shahri and Robert M Rioux, 2018, "CO2 capacity and heat of sorption on a polyethylenimine-impregnated silica under equilibrium and transient sorption conditions", Journal of Physical Chemistry C, 122, pp. 11442-11449
  • Choumini Balasanthiran, Stephanie Jensen, Charles S Spanjers, Shelton JP Varapragasam, Robert M Rioux, Dmitri Kilin and James D Hoefelmeyer, 2018, "Quantitative Attachment of Bimetal Combinations of Transition Metal Ions to the Surface of TiO2 Nanorods", Langmuir, 34, pp. 5422-5434
  • Robert M Rioux and Seong H Kim, 2018, "Molecular Surface Science, Nanomaterials & Catalysis: Symposium in Honor of Gabor Somorjai at 80", 61, pp. 711-713
  • Yong Yang, Ji Woong Chang and Robert M Rioux, 2018, "Structural Elucidation of Supported Rh Complexes Derived from RhCl(PPh3)3 Immobilized on Surface-Functionalized SBA-15 and their Catalytic Performance for C-Heteroatom (S, O) Bond Formation", 365, pp. 43-54
  • Manda Yang, Linxi Wang, Seyed Medhi Kamali Shahri, Robert M Rioux and Antonios Armaou, 2018, "Investigation of CO2 sorption mechanisms in isothermal columns via transient material and energy balance PDE models", 57, pp. 10303-10314
  • Suprita Jharimune, Ajay A Sathe and Robert M Rioux, 2018, "Thermochemical measurements of cation exchange in CdSe nanocrystals using isothermal titration calorimetry", Nano Letters, 18, pp. 6795-6803
  • Robert M Rioux, 2018, "Evaluating Differences in Supported Au Nanoparticle Catalyst Active Site Electronics Using Hammett and DFT Studies", Nature Chemistry, 10, (3), pp. 268-274
  • Shelton JP Varapragasam, Choumini Balasanthiran, Ashim Gurung, Qiquan Qiao, Robert M Rioux and James D Hoefelmeyer, 2017, "Kirkendall Growth of Hollow Mn3O4 Nanoparticles upon Galvanic Reaction of MnO with Cu2+ adn Evaulation as Anode for Lithium-Ion Batteries", Journal of Physical Chemistry C, 121, (21), pp. 11089-11099
  • Long Qi, Ricardo Alamillo, William A Elliott, Amity Anderson, David W Hoyt, Eric D Walter, Kee Sung Han, Nancy D Washton, Robert M Rioux, James A Dumesic and Susannah L Scott, 2017, "Operando Solid-State NMR Observation of Solvent-Mediated Adsorption-Reaction of Carbohydrates in Zeolites", ACS Catalysis, 7, (5), pp. 3489-3500
  • Charles S Spanjers, Anish Dasgupta, Melanie Kirkham, Blake Burger, G Kumar, Michael J Janik and Robert M Rioux, 2017, "Determination of Bulk and Surface Atomic Arrangement in Ni-Zn Gamma Brass Phase at Different Ni to Zn Ratios", Chem. Mater., 29, pp. 504-512
  • Charles S. Spanjers, Pascal Guillo, Michael J Janik, T. Don Tilley and Robert M Rioux, 2017, "Identification of second shell coordination in transition metal species using theoretical XANES: Examples of Ti-O-(C, Si, Ge) molecular complexes", J. Phys. Chem. C, 121, pp. 162-167
  • Ajay Sathe, Anirudh Nambiar and Robert M Rioux, 2017, "Synthesis of cyclic organic carbonates via catalytic oxidative carboxylation of olefins in flow reactors", Catalysis Science and Technology, 7, (1), pp. 84-89
  • C S Sievers, Y Noda, L Qi, E M Albuquerque, Robert M Rioux and S L Scott, 2016, "Phenomena in Catalytic Reactions at Solid-Liquid Interfaces", ACS Catalysis, 6, pp. 8286-8307
  • S G Turney, M Ahmed, I Chandrsekar, R B Wysolmerski, Z M Goeckeler, Robert M Rioux, G M Whitesides and P C Bridgman, 2016, "Nerve growth factor stimulates axon outgrowth through negative regulation of growth cone actomyosin restraint of microtubule advance", Molecular Biology of the Cell, (27), pp. 500-517
  • A Gellman, Robert M Rioux and P Stair, 2016, "Editorial: Special issue dedicated to Gabor Somorjai’s 80th birthday", Surf. Sci., (648), pp. 1
  • J Saavedra, T Whittaker, Z Chen, C J Pursell, Robert M Rioux and B D Chandler, 2016, "Controlling activity and selectivity using water in the Au-catalyzed preferential oxidation in CO in H2", Nature Chem, (8), pp. 585-590
  • Y Noda, K Li, A Engler, W A Elliot and Robert M Rioux, 2016, "Development of Robust Sulfur Quantification and Speciation Method for SBA-15 Supported Sulfonic Acid Catalysts", Catal. Sci. Technol., (6), pp. 5961-5971
  • Davood Babaei Pourkargar, Seyed Mehdi Kamali Shahri, Robert M Rioux and Antonios Armaou, 2016, "Spatiotemporal Modeling and Parametric Estimation of Isothermal CO2 Adsorption Columns", Ind. Eng. Chem. Res., (55), pp. 6443-6453
  • B. Panthi, A. Mukopadhyay, L. Tibbitts, J. Saavedra, C. J. Pursell, Robert M Rioux and B. D. Chandler, 2015, "Using Thiol Adsorption on Supported Au Nanoparticle Catalysts to Evaluate Au Dispersion and the Number of Active Sites for Benzyl Alcohol Oxidation", ACS Catal, 5, pp. 2232-2241
  • Robert M Rioux and F. D. Toste, 2015, "Catalysis Science and Technology: Catalysis in the USA", Catal Sci Technol, 5, pp. 1357-1359
  • Charles S Spanjers, Richard S Sim, Nicholas P Sturgis and Robert M Rioux, 2015, "In-situ Characterization of Ni1-xZnx/ZnO Catalysts and their Selectivity for Acetylene Semihydrogenation in Excess Ethylene", ACS Catal., 5, pp. 3304-3315
  • A. Sathe, M. A. Peck, C. Balasanthiran, M. A. Langell, Robert M Rioux and J. D. Hoefelmeyer, 2014, "X-ray photoelectron spectroscopy of transition metal ions attached to the surface of rod-shape anatase TiO2 nanocrystals", Inorganica Chimica Acta, 422, pp. 8-13
  • D. Childers, N. M. Schweitzer, S. M. Kamali Shahri, Robert M Rioux, J. T. Miller and R. J. Meyer, 2014, "Evidence for Geometric Effects in Neopentane Conversion on PdAu Catalysts", Catal Sci Technol, 4, pp. 4366-4377
  • D. Childers, S. M. Kamali Shahri, N. Schweitzer, Robert M Rioux, J. T. Miller and R. J. Meyer, 2014, "Modifying structure-sensitive reactions by addition of Zn to Pd", J. Catal, 318, pp. 75-84
  • C. S. Spanjers, T. P. Senftle, A. C. T. van Duin, Michael J Janik, A. I. Frenkel and Robert M Rioux, 2014, "Illuminating Surface Atoms in Nanoclusters by Differential X-ray Absorption Spectroscopy", Phys. Chem. Chem. Phys., 16, pp. 26528-26538
  • Y. Yang and Robert M Rioux, 2014, "Highly Stereoselective Anti-Markovnikov Hydrothiolation of Alkynes and Electron-Deficient Alkenes by a Supported Cu-NHC Complex.", Green Chem, 16, pp. 3916-3925
  • S. M. McCarthy, Y. C. Lin, D. Devarajan, J. W. Chang, H. Yennawar, Robert M Rioux, D. H. Ess and A. T. Radosevich, 2014, "Intermolecular N-H Oxidative Addition of Ammonia, Alkylamines and Arylamines to a Planar ?3-Phosphorus Compound via an Entropy-Controlled Electrophlic Mechanism.", J. Am. Chem. Soc., 136, pp. 4640-4650
  • E. G. Moschetta, K. M. Gans and Robert M Rioux, 2014, "Elucidating the Roles of Enthalpy, Entropy, and Donor Atom in the Chelate Effect for Binding Different Bidentate Ligands on the Same Metal Center", Journal of Catalysis 309, pp. 11-20
  • M. A. Smith, A. Zoelle, Y. Yang, Robert M Rioux, N. Hamilton, K. Amakawa, P. K. Nielsen and A. Trunschke, 2014, "Surface roughness effects in the catalytic behavior of vanadia supported on SBA-15.", J. Catal., 312, pp. 170-178
  • M. Strayer, J. M. Binz, M. Tanase, S. M. Kamali Shahri, R. Sharma, Robert M Rioux and T. E. Mallouk, 2014, "Interfacial bonding stabilizes rhodium and rhodium oxide nanoparticles on layered Nb- and Ta oxide supports.", J. Am. Chem. Soc., 136, pp. 5687-5696
  • C. S. Spanjers, J. T. Held, M. J. Jones, D. D. Stanley, R. S. Sim, Michael J Janik and Robert M Rioux, 2014, "Zinc Inclusion to Heterogeneous Nickel Catalysts Reduces Oligomerization during the Semihydrogenation of Acetylene.", J. Catal., 316, pp. 164-173
  • M. H. Do, T. Wang, Dang-Guo Cheng, Robert M Rioux and J. Gong, 2014, "Simple Strategies for Fabrication of a Periodic Mesoporous Aluminosilicate with Crystalline Walls", Small, 10, pp. 4249-4256
  • V. Ravi, J. M. Binz and Robert M Rioux, 2013, "Thermodynamic Profiles at the Solvated Inorganic-Organic Interface: The case of Gold-Thiolate Monolayers", Nano Lett., 13, pp. 4442-4448
  • E. G. Moschetta, Kristina M. Gans and Robert M Rioux, 2013, "Characterization of sites of different thermodynamic affinities on the same metal center via isothermal titration calorimetry", Journal of Catalysis, 302, pp. 1-9
  • Y. Yang, Eric G. Moschetta and Robert M Rioux, 2013, "Addition of Sulfonic Acids to Terminal Alkynes Catalyzed by a Rhodium Complex: Ligand Concentration-Controlled Reaction Selectivity", ChemCatChem, 5, pp. 3005-3013
  • W. Kang, C. S. Spanjers, Robert M Rioux and J. D. Hoefelmeyer, 2013, "Synthesis of brookite TiO2 nanorods with isolated Co(II) surface sites and photocatalytic degradation of 5,8-dihydroxy-1,4-naphthoquinone dye", J. Mater. Chem. A, 1, pp. 7717-7728
  • S. Jana, J. W. Chang and Robert M Rioux, 2013, "Synthesis and Modeling of Hollow Intermetallic Ni-Zn Nanoparticles Formed by the Kirkendall Effect", Nano Lett., 13, pp. 3618-3625
  • D. Childers, A. Saha, N. Schweitzer, Robert M Rioux, J. T. Miller and R. J. Meyer, 2013, "Correlating Heat of Adsorption to Reaction Selectivity: Size Effects in Neopentane Isomerization over Pt and Pd Catalyst", ACS Catal., 3, pp. 2487-2496
  • P. Cordeiro, P. Guillo, C. S. Spanjers, J. W. Chang, M. Lipschutz, M. Fasulo, Robert M Rioux and T. D. Tilley, 2013, "Titanium-Germoxy Precursor Route to Germanium-Modified Epoxidation Catalysts with Enhanced Activity", ACS Catal., 3, pp. 2269-2279
  • Y. Yang, W. Dong, Y. Guo and Robert M Rioux, 2013, "Cu(I)-Catalyzed Aerobic Cross-Dehydrogenative Coupling of Terminal Alkynes with Thiols for Construction of Alkynyl Sulfides", Green Chem., 15, pp. 3170-3175
  • S. Janna and Robert M Rioux, 2012, "Seeded Growth Induced Amorphous to Crystalline Transformation of Niobium Oxide Nanostructures", Nanoscale, 4, pp. 1782-1788
  • S. J. Kweskin, Robert M Rioux, H. Song, K. Komvopoulos, P. Yang and G. A. Somorjai, 2012, "High-Pressure Adsorption of Ethylene on Cubic Pt Nanoparticles and Pt(100) Single Crystals Probed by in Situ Sum Frequency Generation Vibrational Spectroscopy", ACS Catal., 2, pp. 2377-2386
  • Yeon S. Choi, Eric G. Moschetta, Jeffrey T. Miller, Meg Fasulo, Meredith J. McMurdo, Robert M Rioux and T. Don Tilley, 2011, "Highly Dispersed Pd-SBA15 Materials from Tris(tert-butoxy)siloxy Complexes of Pd(II)", ACS Catalysis 1, pp. 1166-1177
  • Y. Yang and Robert M Rioux, 2011, "Highly regio- and stereoselective hydrothiolation of acetylenes with thiols catalyzed by a well-defined supported Rh complex", Chemical Communications, 47, pp. 6557-6559
  • J. Gong and Robert M Rioux, 2011, "Heterogeneous catalysis by metals: New synthetic methods and characterization techniques for high reactivity preface", Catalysis Today, 160, pp. 1-2
  • S. Eldahj, Robert M Rioux, M. D. Dickey, J. J. DeYoreo and G. M. Whitesides, 2010, "Subnanometer Replica Molding of Molecular Steps on Ionic Crystals", Nano Lett., pp. 4140-4145
  • N. Chen, Robert M Rioux, Luis A. M. M. Barbosa and F. H. Ribeiro, 2010, "Kinetic and Theoretical Study of the Hydrodechlorination of CH4-xClx (x=1-4) Compounds on Palladium", Langmuir, 26, pp. 16615-16624
  • S. H. Kim, F. H. Ribeiro and Robert M Rioux, 2010, "Preface to the Molecular Surface Chemistry and Its Applications Special Issue", Langmuir, 26, pp. 16187-16189
  • D. J. Lipomi, R. V. Martinez, Robert M Rioux, L. Cademartiri, W. F. Reus and G. M. Whitesides, 2010, "Survey of Materials for Nanoskiving and Influence of the Cutting Process on the Nanostructures Produced", ACS Applied Materials and Interfaces, 2, pp. 2503-2514
  • M. E. Grass, Robert M Rioux and G. A. Somorjai, 2009, "Dependence of gas-phase crotonaldehyde hydrogenation selectivity and activity on the size of Pt nanoparticles (1.7-7.1 nm) supported on SBA-15", Catal. Lett., 128, pp. 1-8
  • J. Gingras, Robert M Rioux, D. Cuvelier, N. A. Geisse, L. Mahadevan, J. W. Lichtman, G. M. Whitesides and J. R. Sanes, 2009, "Controlling the Orientation and Synaptic differentiation of Myotubes with Micropatterned Substrates", Biophysical Journal, 97, pp. 2771-2779
  • Robert M Rioux, J. D. Hoefelmeyer, M. Grass, H. Song, K. Niesz, P. D. Yang and G. A. Somoraji, 2008, "Adsorption and co-adsorption of ethylene and carbon monoxide on silica-supported monodisperse Pt nanoparticles. Volumetric adsorption and infrared spectroscopy studies", Langmuir, 24, pp. 198-207
  • Robert M Rioux, H. Song, M. Grass, J. D. Hoefelmeyer, K. Niesz, P. D. Yang and G. A. Somoraji, 2008, "Kinetics and mechanism of the poisoning of ethylene hydrogenation by CO on silica-supported monodisperse Pt nanoparticles", J. Catal., 254, pp. 1-11
  • M. E. Grass, Y. Yue, S. E. Habas, Robert M Rioux, C. I. Teall, P. Yang and G. A. Somorjai, 2008, "Silver ion mediated shape control of platinum nanoparticles: Removal of silver by selective etching leads to increased catalytic activity", J. Phys. Chem. C, 112, pp. 4797-4804
  • D. A. Ruddy, J. Jarupatrakorn, Robert M Rioux, J. T. Miller, M. J. McMurdo, K. A. Tupper and T. D. Tilley, 2008, "Site-Isolated Pt-SBA15 Materials from Tris(tert-butoxy)siloxy Complexes of Pt(II) and Pt(IV)", Chem. Mater., 20, pp. 6517-6527
  • Robert M Rioux, B. Hsu, M. E. Grass, H. Song and G. A. Somorjai, 2008, "Influence of particle size on reaction selectivity in cyclohexene hydrogenation and dehydrogenation over silica-supported monodisperse Pt particles", Catal. Lett., 126, pp. 10-19
  • Q. Xu, Robert M Rioux, M. D. Dickey and G. M. Whitesides, 2008, "Nanoskiving: A New Method to Produce Nanomaterials", Acc. Chem. Res., 41, pp. 1566-1577
  • T. J. Toops, W. N. Delgass and Robert M Rioux, 2007, "M. Albert Vannice Festschrift", Catal. Today, 123, pp. 2-5
  • Q. Xu, J. Bao, Robert M Rioux, R. Perez-Castejillos, F. Capasso and G. M. Whitesides, 2007, "Fabrication of Large-Area Patterned Nanostructures for Optical Applications by Nanoskiving", Nano Lett., 7, pp. 2800-2805
  • Q. Xu, Robert M Rioux and G. M. Whitesides, 2007, "Fabrication of Complex Nanostructures by Nanoskiving", ACS Nano, 1, pp. 215-221
  • M. Yang, Robert M Rioux and G. A. Somorjai, 2006, "Reaction kinetics and in-situ sum frequency generation surface vibrational spectroscopy studies of cycloalkene hydrogenation/ dehydrogenation on Pt(111): substituent effects and CO poisoning mechanism", J. Catal., 237, pp. 255-266
  • H. Song, Robert M Rioux, J. D. Hoefelmeyer, R. Komor, K. Niesz, M. Grass, P. Yang and G. A. Somorjai, 2006, "Hydrothermal growth of mesoporous SBA-15 silica in the presence of PVP-stabilized Pt nanoparticles: Synthesis, characterization, and catalytic properties", J. Am. Chem. Soc., 128, pp. 3027-3037
  • G. A. Somorjai, A. M. Contreras, M. Montano and Robert M Rioux, 2006, "Clusters, Surfaces, and Catalysis", Proc. Nat. Acad., U. S. A, 103, pp. 10577-83
  • S. Kweskin, Robert M Rioux, S. E. Habas, K. Komvopoulos, P. Yang and G. A. Somorjai, 2006, "Carbon Monoxide Adsorption and Oxidation on Monolayer Films of Cubic Platinum Nanoparticles Investigated by Infrared-Visible Sum Frequency Generation Vibrational Spectroscopy", J. Phys. Chem. B, 110, pp. 15920-15925
  • Robert M Rioux, H. Song, M. Grass, S. Habas, K. Niesz, J. D. Hoefelmeyer, P. Yang and G. A. Somorjai, 2006, "Monodisperse platinum nanoparticles of well-defined shape: Synthesis, characterization, catalytic properties and future prospects", Top. Catal., 39, pp. 167-174
  • Robert M Rioux, A. L. Marsh, J. S. Gaughan and G. A. Somorjai, 2006, "Oxidation and reforming reactions of methane on a stepped Pt(557) single crystal", Catal. Today, 123, pp. 265-275
  • Robert M Rioux, H. Song, J. D. Hoefelmeyer, P. Yang and G. A. Somorjai, 2005, "High-Surface-Area Catalyst Design: Synthesis, Characterization, and Reaction Studies of Platinum Nanoparticles in Mesoporous SBA-15 Silica", J. Phys. Chem. B, 109, pp. 2192-2202
  • G. A. Somorjai and Robert M Rioux, 2005, "High Technology Catalysts Towards 100% Selectivity. Fabrication, Characterization, and Reaction Studies", Catalysis Today, 100, pp. 201-215
  • Robert M Rioux and M. A. Vannice, 2005, "Dehydrogenation of isopropyl alcohol on carbon-supported Pt and Cu-Pt catalysts", J. Catal., 233, pp. 147-165
  • Y. Yin, Robert M Rioux, C. K. Erdonmez, S. Hughes, G. A. Somorjai and A. P. Alivisatos, 2004, "Formation of Hollow Nanocrystals through the Nanoscale Kirkendall Effect", Science, 304, pp. 711-714
  • N. Chen, Robert M Rioux and F. H. Ribeiro, 2004, "Hydrodechlorination reactions of 2-chloro-1,1,1,2-tetrafluoroethane and chloroethane in H2 and D2 on Pd catalysts", Appl. Catal. A-Gen, 271, pp. 85-94
  • Robert M Rioux and M. A. Vannice, 2003, "Hydrogenation/dehydrogenation: Isopropanol dehydrogenation over copper catalysts", J. Catal., 216, pp. 362-376
  • N. Chen, Robert M Rioux and F. H. Ribeiro, 2002, "Investigation of Reaction Steps for the Hydrodechlorination of Chlorine-Containing Organic Compounds on Pd Catalysts", J. Catal., 211, pp. 192-197
  • K. O. Nowack, Robert M Rioux, C. Na, X. Wu and L. R. Radovic, 2001, "A commentary on "Effect of metal additives on the physico-chemical characteristics of activated carbon exemplified by benzene and acetic acid adsorption", Carbon, 39, pp. 951-953
  • C. D. Thompson, Robert M Rioux, N. Chen and F. H. Ribeiro, 2000, "Turnover Rate, Reaction Order and Elementary Steps for the Hydrodechlorination of Chlorofluorocarbons on Palladium Catalysts", J. Phys. Chem. B, 104, pp. 3067-3077
  • Robert M Rioux, C. D. Thompson, N. Chen and F. H. Ribeiro, 2000, "Hydrodechlorination of chlorofluorocarbons CF3-CFCl2 and CF3-CCl3 over Pd/C and Pd black catalysts", Catal. Today, 62, pp. 269-278
  • M. E. Strayer, T. P. Senftle, J. P. Winterstein, N. M. Vargos-Barbosa, R. Sharma, Robert M Rioux, Michael J Janik and T. E. Mallouk, , "Charge Transfer Stabilization of Late Transition Metal Oxide Nanoparticles on a Layered Support", J. Am. Chem. Soc., 137, pp. 16216-16224
  • Anish Dasgupta, Haoran He, Rushi Gong, Shun-Li Shang, Eric K Zimmerer, Zi-Kui Lui, Randall J Meyer, Michael J Janik and Robert M Rioux, , "Atomic Control of Active Site Ensembles in Ordered Alloys to Enhance Hydrogenation Selectivity", Nature Chemistry, 14, pp. 6
  • Prawal Agrawal, Devon Jensen, Chien-Hua Chen, Robert M Rioux and Themis Matsoukas, , "Synthesis and Characterization of Magnesium/Boron Solid Solutions for Energetic Applications", ACS Applied Energy Materials, 5, pp. 7
  • Linxi Wang, Shyam Deo, Ahana Mukhopadhyay, Nicholas Pantelis, Michael Janik and Robert M Rioux, , "Emergent Behavior in Oxidation Catalysis over Single-Atom Pd on a Reducible CeO2 Support via Mixed Redox Cycles", ACS Catalysis, 12, pp. 14


  • Robert M Rioux, 2016, "Analysis of Isothermal Titration Calorimetry Data"
  • Robert M Rioux, 2016, "Catalysis for the Production of Renewable Energy"
  • Robert M Rioux, 2015, "Catalysis within Nanoconfined Spaces"
  • Robert M Rioux, 2014, "XAFS Techniques for Catalysts, Nanomaterials, and Surfaces"
  • Robert M Rioux, 2012, "Atomically Precise Methods for Synthesis of Solid Catalysts"
  • Robert M Rioux, 2009, "Liquid Phase Oxidation via Heterogeneous Catalysis"
  • Robert M Rioux, H. Song, P. Yang and G. A. Somoraj, 2007, "Platinum Nanoclusters: Size and Shape Surface Structure Sensitivity of Catalytic Reactions"
  • G. A. Somorjai, Robert M Rioux and J. Grunes, 2003, "Fabrication of Two-Dimensional and Three-Dimensional Platinum Nanoclusters to Serve as High Technology Catalysts - Catalysts Capable of 100% Reaction Selectivity", pp. 97-125

Research Projects

Honors and Awards

  • PSEAS Outstanding Teaching Award, Penn. State Engineering Alumni Association Society, 2018


Service to Penn State:

Service to External Organizations:




The Penn State Department of Chemical Engineering, established in 1948, is recognized as one of the largest and most influential chemical engineering departments in the nation.

The department is built upon the fundamentals of academic integrity, innovation in research, and commitment to the advancement of industry.

Department of Chemical Engineering

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University Park, PA 16802

Phone: 814-865-2574