Jump to main content
Jump to site search


Crystalline Nickel Manganese Antimonate as a Stable Water-Oxidation Catalyst in Aqueous 1.0 M H2SO4

Abstract

Water oxidation is a required half-reaction for electrochemical water splitting. To date, the only well-established active oxygen-evolution catalysts stable under operating conditions and at rest in acidic aqueous media contain Ru or Ir, two of the scarcest non-radioactive elements on Earth. We report herein a nickel-manganese antimonate electrocatalyst with a rutile-type crystal structure that requires an initial voltammetric overpotential of 672 ± 9 mV to catalyze the oxidation of water to O2(g) at a rate corresponding to 10 mA cm-2 of current density when operated in contact with 1.0 M sulfuric acid. Under galvanostatic control, the overpotential initially rose from 670 mV but was then stable at 730 ± 3 for 168 h of continuous operation at 10 mA cm-2. We additionally provide an in-depth evaluation of the stability of the nickel-manganese antimonate electrocatalyst, including elemental characterization of the surface, bulk, and electrolyte before and after electrochemical operation.

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 May 2017, accepted on 10 Aug 2017 and first published on 10 Aug 2017


Article type: Communication
DOI: 10.1039/C7EE01486D
Citation: Energy Environ. Sci., 2017, Accepted Manuscript
  •   Request permissions

    Crystalline Nickel Manganese Antimonate as a Stable Water-Oxidation Catalyst in Aqueous 1.0 M H2SO4

    I. A. Moreno-Hernandez, C. A. MacFarland, C. G. Read, B. S. Brunschwig, K. M. Papadantonakis and N. Lewis, Energy Environ. Sci., 2017, Accepted Manuscript , DOI: 10.1039/C7EE01486D

Search articles by author

Spotlight

Advertisements