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Issue 25, 2015
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Contributions to activity enhancement via Fe incorporation in Ni-(oxy)hydroxide/borate catalysts for near-neutral pH oxygen evolution

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Abstract

Ni–borate materials are oxygen evolution catalysts that operate at near-neutral pH and have been found previously to improve due to structural changes induced via anodic conditioning. We find that this increased activity after conditioning at 0.856 V vs. SCE, as measured on a turn-over frequency basis (TOF) at 400 mV overpotential (TOF = 0.38 s−1), accompanies significant Fe incorporation (14%). Films conditioned in Fe-free electrolyte exhibit ∼10 times lower activity (TOF = 0.03 s−1). By co-depositing Fe–Ni we demonstrate high activity without conditioning (TOF = 0.24 s−1) which improves further with shortened (∼30 min) conditioning (TOF = 1.4 s−1).

Graphical abstract: Contributions to activity enhancement via Fe incorporation in Ni-(oxy)hydroxide/borate catalysts for near-neutral pH oxygen evolution

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Supplementary files

Article information


Submitted
01 Nov 2014
Accepted
22 Dec 2014
First published
23 Dec 2014

Chem. Commun., 2015,51, 5261-5263
Article type
Communication
Author version available

Contributions to activity enhancement via Fe incorporation in Ni-(oxy)hydroxide/borate catalysts for near-neutral pH oxygen evolution

A. M. Smith, L. Trotochaud, M. S. Burke and S. W. Boettcher, Chem. Commun., 2015, 51, 5261
DOI: 10.1039/C4CC08670H

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