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

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.

SUBMITTER: Li N 

PROVIDER: S-EPMC5321006 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature