Influence of iron doping on tetravalent nickel content in catalytic oxygen evolving films

Nancy Li, D. Kwabena Bediako, Ryan G. Hadt, Dugan Hayes, Thomas J. Kempa, Felix Von Cube, David C. Bell, Lin X. Chen, Daniel G. Nocera*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

224 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)1486-1491
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume114
Issue number7
DOIs
StatePublished - Feb 14 2017

Keywords

  • Catalysis
  • Electrocatalysis
  • Oxygen evolution reaction
  • Renewable energy
  • Water splitting

ASJC Scopus subject areas

  • General

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