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Nickel based electrocatalysts for oxygen evolution in high current density,alkaline water electrolysers

Nickel based electrocatalysts for oxygen evolution in high current density,alkaline water electrolysers
Nickel based electrocatalysts for oxygen evolution in high current density,alkaline water electrolysers
A number of nickel based materials are investigated as potential oxygen evolution catalysts under conditions close to those met in modern, high current density alkaline water electrolysers. Microelectrodes are used to avoid distortion of voltammetric data by IR drop even at the high current densities employed in such water electrolysers. High surface area nickel metal oxides prepared by cathodic deposition and mixed oxides prepared by thermal methods are considered. A mixed Ni/Fe oxide is the preferred electrocatalyst. The influence of hydroxide ion concentration and temperature on the voltammetry is defined. Preliminary stability tests in a zero gap cell with an OH? conducting membrane show no significant increase in overpotential during 10 days operation in 4 M NaOH electrolyte at a current density of 1 A cm?2 at 333 K.
1463-9076
1162-1167
Li, Xiaohong
ea8135d4-1bd7-4771-85cd-eb8f2a264654
Walsh, Frank C.
309528e7-062e-439b-af40-9309bc91efb2
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Li, Xiaohong
ea8135d4-1bd7-4771-85cd-eb8f2a264654
Walsh, Frank C.
309528e7-062e-439b-af40-9309bc91efb2
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30

Li, Xiaohong, Walsh, Frank C. and Pletcher, Derek (2011) Nickel based electrocatalysts for oxygen evolution in high current density,alkaline water electrolysers. Physical Chemistry Chemical Physics, 13 (3), 1162-1167. (doi:10.1039/c0cp00993h).

Record type: Article

Abstract

A number of nickel based materials are investigated as potential oxygen evolution catalysts under conditions close to those met in modern, high current density alkaline water electrolysers. Microelectrodes are used to avoid distortion of voltammetric data by IR drop even at the high current densities employed in such water electrolysers. High surface area nickel metal oxides prepared by cathodic deposition and mixed oxides prepared by thermal methods are considered. A mixed Ni/Fe oxide is the preferred electrocatalyst. The influence of hydroxide ion concentration and temperature on the voltammetry is defined. Preliminary stability tests in a zero gap cell with an OH? conducting membrane show no significant increase in overpotential during 10 days operation in 4 M NaOH electrolyte at a current density of 1 A cm?2 at 333 K.

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Published date: 2011

Identifiers

Local EPrints ID: 183035
URI: http://eprints.soton.ac.uk/id/eprint/183035
ISSN: 1463-9076
PURE UUID: 0bd4a14e-3ffa-400c-9d41-7bc18b191d76

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Date deposited: 28 Apr 2011 14:04
Last modified: 14 Mar 2024 03:02

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Contributors

Author: Xiaohong Li
Author: Frank C. Walsh
Author: Derek Pletcher

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