Dynamic structure of active sites in ceria-supported Pt catalysts for the water gas shift reaction

Yuanyuan Li (), Matthew Kottwitz, Joshua L. Vincent, Michael J. Enright, Zongyuan Liu, Lihua Zhang, Jiahao Huang, Sanjaya D. Senanayake, Wei-Chang D. Yang, Peter A. Crozier, Ralph G. Nuzzo and Anatoly I. Frenkel
Additional contact information
Yuanyuan Li: Stony Brook University
Matthew Kottwitz: University of Illinois
Joshua L. Vincent: Arizona State University
Michael J. Enright: University of Illinois
Zongyuan Liu: Chemistry Division, Brookhaven National Laboratory
Lihua Zhang: Center for Functional Nanomaterials, Brookhaven National Laboratory
Jiahao Huang: Stony Brook University
Sanjaya D. Senanayake: Chemistry Division, Brookhaven National Laboratory
Wei-Chang D. Yang: National Institute of Standards and Technology
Peter A. Crozier: Arizona State University
Ralph G. Nuzzo: University of Illinois
Anatoly I. Frenkel: Stony Brook University

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract 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 find that the perimeter Pt0 − O vacancy−Ce3+ sites are formed in the active structure, transformed at working temperatures and their appearance regulates the adsorbate behaviors. We find that the dynamic nature of this site is a key mechanistic step for the WGS reaction.

Date: 2021
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DOI: 10.1038/s41467-021-21132-4

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