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Dynamic Structure of Active Sites in Ceria-Supported Pt Catalysts for the Water Gas Shift Reaction



Yuanyuan Li, Matthew Kottwitz, Joshua L. Vincent, Zongyuan Liu, Michael J. Enright, Lihua Zhang, Jiahao Huang, Sanjaya D. Senanayake, Wei-Chang Yang, Peter A. Crozier, Ralph G. Nuzzo, Anatoly I. Frenkel


Oxide-supported noble metal catalysts have been extensively studied for decades for the water gas shift (WGS) reaction, a catalytic transformation central to a host of large volume processes that variously utilize or produce hydrogen. There remains considerable uncertainty as to how the specific features of the active metal-support interfacial bonding - perhaps most importantly the temporal dynamic changes occurring therein - serve to enable high activity and selectivity. Here we report the dynamic characteristics of a Pt/CeO2 system at the atomic level for the WGS reaction and specifically reveal the synergistic effects of metal-support bonding at the perimeter region. We found that the perimeter Pt0−O vacancy−Ce3+ sites are formed in the active structure, transformed at working temperatures and its appearance regulates the adsorbate behaviors. We find that the dynamic nature of this site is a key mechanistic step for the WGS reaction.
Nature Communications


in situ TEM, ETEM, water gas shift reaction, dynamic structure, catalysis


Li, Y. , Kottwitz, M. , Vincent, J. , Liu, Z. , Enright, M. , Zhang, L. , Huang, J. , Senanayake, S. , Yang, W. , Crozier, P. , Nuzzo, R. and Frenkel, A. (2021), Dynamic Structure of Active Sites in Ceria-Supported Pt Catalysts for the Water Gas Shift Reaction, Nature Communications, [online],, (Accessed February 22, 2024)
Created February 9, 2021, Updated October 12, 2021