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

Journal Article · · Nature Communications
ORCiD logo [1];  [2];  [3];  [2];  [4];  [5]; ORCiD logo [1];  [4]; ORCiD logo [6];  [3];  [7]; ORCiD logo [8]
  1. Stony Brook Univ., NY (United States)
  2. Univ. of Illinois at Urbana, IL (United States)
  3. Arizona State Univ., Tempe, AZ (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
  5. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
  6. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States)
  7. Univ. of Illinois at Urbana, IL (United States); KTH Royal Inst. of Technology, Stockholm (Sweden)
  8. Stony Brook Univ., NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)

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.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division; National Science Foundation (NSF); National Institute of Standards and Technology (NIST)
Grant/Contract Number:
FG02-03ER15476; SC0012704; AC02-06CH11357; CBET-1604971; 70NANB14H209
OSTI ID:
1766166
Alternate ID(s):
OSTI ID: 1772732
Report Number(s):
BNL-221190-2021-JAAM; APS_261220
Journal Information:
Nature Communications, Vol. 12, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
ENGLISH

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