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Atomic-layered Au clusters on α-MoC as catalysts for the low-temperature water-gas shift reaction

Journal Article · · Science
 [1];  [2];  [3];  [4];  [5];  [6];  [1];  [4];  [5];  [2];  [6];  [6];  [7];  [1];  [1];  [8];  [8];  [9];  [2];  [5] more »;  [1] « less
  1. Peking Univ., Beijing (China)
  2. Dalian Univ. of Technology, Dalian (China)
  3. Univ. of Chinese Academy of Sciences, Beijing (China); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Chinese Academy of Sciences, Shanxi (China); Synfuels China, Beijing (China)
  5. Brookhaven National Lab. (BNL), Upton, NY (United States)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  7. Taiyuan Univ. of Technology, Shanxi (China)
  8. Lehigh Univ., Bethlehem, PA (United States)
  9. Chinese Academy of Sciences (CAS), Beijing (China)
Here, the water-gas shift (WGS) reaction (where carbon monoxide plus water yields dihydrogen and carbon dioxide) is an essential process for hydrogen generation and carbon monoxide removal in various energy-related chemical operations. This equilibrium-limited reaction is favored at a low working temperature. Potential application in fuel cells also requires a WGS catalyst to be highly active, stable, and energy-efficient and to match the working temperature of on-site hydrogen generation and consumption units. We synthesized layered gold (Au) clusters on a molybdenum carbide (α-MoC) substrate to create an interfacial catalyst system for the ultralow-temperature WGS reaction. Water was activated over α-MoC at 303 kelvin, whereas carbon monoxide adsorbed on adjacent Au sites was apt to react with surface hydroxyl groups formed from water splitting, leading to a high WGS activity at low temperatures.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-05CH11231; SC0012704
OSTI ID:
1411142
Alternate ID(s):
OSTI ID: 1418304
Report Number(s):
BNL--114190-2017-JA; KC0302010
Journal Information:
Science, Journal Name: Science Journal Issue: 6349 Vol. 357; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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Trapping [PMo 12 O 40 ] 3− clusters into pre-synthesized ZIF-67 toward Mo x Co x C particles confined in uniform carbon polyhedrons for efficient overall water splitting journal January 2018
Entropy-stabilized metal oxide solid solutions as CO oxidation catalysts with high-temperature stability journal January 2018
Well dispersed MoC quantum dots in ultrathin carbon films as efficient co-catalysts for photocatalytic H 2 evolution journal January 2018
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