Template-stabilized oxidic nickel oxygen evolution catalysts

Nancy Li, Thomas P. Keane, Samuel S. Veroneau, Ryan G. Hadt, Dugan Hayes, Lin X. Chen, Daniel G. Nocera*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Earth-abundant oxygen evolution catalysts (OECs) with extended stability in acid can be constructed by embedding active sites within an acid-stable metal-oxide framework. Here, we report stable NiPbOx films that are able to perform oxygen evolution reaction (OER) catalysis for extended periods of operation (>20 h) in acidic solutions of pH 2.5; conversely, native NiOx catalyst films dissolve immediately. In situ X-ray absorption spectroscopy and ex situ X-ray photoelectron spectroscopy reveal that PbO2 is unperturbed after addition of Ni and/or Fe into the lattice, which serves as an acid-stable, conductive framework for embedded OER active centers. The ability to perform OER in acid allows the mechanism of Fe doping on Ni catalysts to be further probed. Catalyst activity with Fe doping of oxidic Ni OEC under acid conditions, as compared to neutral or basic conditions, supports the contention that role of Fe3+ in enhancing catalytic activity in Ni oxide catalysts arises from its Lewis acid properties.

Original languageEnglish (US)
Pages (from-to)16187-16192
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume117
Issue number28
DOIs
StatePublished - Jul 14 2020

Keywords

  • Acid-stable templating
  • Electrocatalysis
  • Renewable energy
  • Solar to fuels
  • Water-splitting catalysis

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'Template-stabilized oxidic nickel oxygen evolution catalysts'. Together they form a unique fingerprint.

Cite this