Author:
Li Nancy,Bediako D. Kwabena,Hadt Ryan G.,Hayes Dugan,Kempa Thomas J.,von Cube Felix,Bell David C.,Chen Lin X.,Nocera Daniel G.
Abstract
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.
Funder
U.S. Department of Energy
National Science Foundation
Publisher
Proceedings of the National Academy of Sciences
Cited by
483 articles.
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