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This content will become publicly available on July 28, 2018

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

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.
Authors:
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  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)
Publication Date:
Report Number(s):
BNL-114190-2017-JA
Journal ID: ISSN 0036-8075; R&D Project: CO040; KC0302010; TRN: US1800180
Grant/Contract Number:
SC0012704; AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Science
Additional Journal Information:
Journal Volume: 357; Journal Issue: 6349; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
OSTI Identifier:
1418304
Alternate Identifier(s):
OSTI ID: 1411142