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Title: Homogeneously dispersed multimetal oxygen-evolving catalysts

Earth-abundant first-row (3d) transition metal–based catalysts have been developed for the oxygen-evolution reaction (OER); however, they operate at overpotentials substantially above thermodynamic requirements. Density functional theory suggested that non-3d high-valency metals such as tungsten can modulate 3d metal oxides, providing near-optimal adsorption energies for OER intermediates. We developed a room-temperature synthesis to produce gelled oxyhydroxides materials with an atomically homogeneous metal distribution. These gelled FeCoW oxyhydroxides exhibit the lowest overpotential (191 millivolts) reported at 10 milliamperes per square centimeter in alkaline electrolyte. The catalyst shows no evidence of degradation after more than 500 hours of operation. As a result, X-ray absorption and computational studies reveal a synergistic interplay between tungsten, iron, and cobalt in producing a favorable local coordination environment and electronic structure that enhance the energetics for OER.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [4] ;  [4] ;  [5] ;  [3] ;  [3] ;  [6] ;  [3] ;  [3] ;  [3] ;  [3] ;  [3] ;  [7] ;  [7] ;  [8] ;  [8] ;  [3] more »;  [3] ;  [9] ;  [8] ;  [4] ;  [3] « less
  1. Univ. of Toronto, Toronto, ON (Canada); East China Univ. of Science and Technology, Shanghai (China)
  2. Univ. of Toronto, Toronto, ON (Canada); Tianjin Univ., Tianjin (China)
  3. Univ. of Toronto, Toronto, ON (Canada)
  4. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. Tianjin Univ., Tianjin (China); Brookhaven National Lab. (BNL), Upton, NY (United States)
  6. Chinese Academy of Sciences (CAS), Beijing (China)
  7. Canadian Light Source (CLS), Saskatoon, SK (Canada)
  8. East China Univ. of Science and Technology, Shanghai (China)
  9. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
OSTI Identifier:
1248381
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Science
Additional Journal Information:
Journal Volume: 352; Journal Issue: 6283; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Research Org:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE