Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 114, Issue 7, Pages 1486-1491Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1620787114
Keywords
water splitting; renewable energy; electrocatalysis; oxygen evolution reaction; catalysis
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Funding
- Solar Photochemistry Program of the Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Sciences of the US Department of Energy
- Joseph J. Katz Postdoctoral Fellowship at ANL
- Science and Technology Center for Integrated Quantum Materials, National Science Foundation (NSF) [DMR-1231319]
- US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- National Science Foundation [ECS-0335765]
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Iron doping of nickel oxide films results in enhanced activity for promoting the oxygen evolution reaction (OER). Whereas this enhanced activity has been ascribed to a unique iron site within the nickel oxide matrix, we show here that Fe doping influences the Ni valency. The percent of Fe3+ doping promotes the formation of formal Ni4+, which in turn directly correlates with an enhanced activity of the catalyst in promoting OER. The role of Fe3+ is consistent with its behavior as a superior Lewis acid.
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