학술논문
Influence of iron doping on tetravalent nickel content in catalytic oxygen evolving films
Document Type
article
Author
Source
Proceedings of the National Academy of Sciences of the United States of America. 114(7)
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Language
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.