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Title: 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.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
Argonne National Laboratory - Laboratory Directed Research and Development (LDRD); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1373596
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Proceedings of the National Academy of Sciences of the United States of America; Journal Volume: 114; Journal Issue: 7
Country of Publication:
United States
Language:
English
Subject:
oxygen evolution reaction; Water-splitting; electrocatalysis; renewable energy; solar-to-fuels

Citation Formats

Li, Nancy, Bediako, D. Kwabena, Hadt, Ryan G., Hayes, Dugan, Kempa, Thomas J., von Cube, Felix, Bell, David C., Chen, Lin X., and Nocera, Daniel G. Influence of iron doping on tetravalent nickel content in catalytic oxygen evolving films. United States: N. p., 2017. Web. doi:10.1073/pnas.1620787114.
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. Influence of iron doping on tetravalent nickel content in catalytic oxygen evolving films. United States. doi:10.1073/pnas.1620787114.
Li, Nancy, Bediako, D. Kwabena, Hadt, Ryan G., Hayes, Dugan, Kempa, Thomas J., von Cube, Felix, Bell, David C., Chen, Lin X., and Nocera, Daniel G. Mon . "Influence of iron doping on tetravalent nickel content in catalytic oxygen evolving films". United States. doi:10.1073/pnas.1620787114.
@article{osti_1373596,
title = {Influence of iron doping on tetravalent nickel content in catalytic oxygen evolving films},
author = {Li, Nancy and Bediako, D. Kwabena and Hadt, Ryan G. and Hayes, Dugan and Kempa, Thomas J. and von Cube, Felix and Bell, David C. and Chen, Lin X. and Nocera, Daniel G.},
abstractNote = {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.},
doi = {10.1073/pnas.1620787114},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 7,
volume = 114,
place = {United States},
year = {Mon Jan 30 00:00:00 EST 2017},
month = {Mon Jan 30 00:00:00 EST 2017}
}