Issue 7, 2014

A survey of diverse earth abundant oxygen evolution electrocatalysts showing enhanced activity from Ni–Fe oxides containing a third metal

Abstract

Mixed metal oxides comprise a diverse class of materials that are appealing as potential water oxidation electrocatalysts. Here we report combinatorial screening of nearly 3500 trimetallic AxByCzOq mixed metal oxide compositions that led to the discovery of electrocatalysts with enhanced activity relative to, inter alia, the well-studied pure oxides, ABO3, and AB2O4 stoichiometries of those metals. Using a fluorescence-based parallel screening method, we directly detect electrolytic oxygen-evolution activity of catalyst arrays under alkaline conditions. From these data, composition–activity relationships amongst mixed oxides composed of earth-abundant elements have been determined. Significant sustained activity is observed only in the presence of Co or Ni, and the data draw attention to synergistic interactions between these redox-active ions and Lewis-acidic cations, such as Fe, Al, Ga, and Cr. The best activities are observed with oxides composed of Ni and Fe, together with another element.

Graphical abstract: A survey of diverse earth abundant oxygen evolution electrocatalysts showing enhanced activity from Ni–Fe oxides containing a third metal

Supplementary files

Article information

Article type
Paper
Submitted
06 Feb 2014
Accepted
28 May 2014
First published
29 May 2014

Energy Environ. Sci., 2014,7, 2376-2382

Author version available

A survey of diverse earth abundant oxygen evolution electrocatalysts showing enhanced activity from Ni–Fe oxides containing a third metal

J. B. Gerken, S. E. Shaner, R. C. Massé, N. J. Porubsky and S. S. Stahl, Energy Environ. Sci., 2014, 7, 2376 DOI: 10.1039/C4EE00436A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements