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Issue 44, 2020
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Low-iridium electrocatalysts for acidic oxygen evolution

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Abstract

The widespread use of proton-exchange membrane water electrolysis is limited by the dynamically sluggish oxygen evolution reaction (OER), which is mediated by noble iridium-based materials as active and stable electrocatalysts. Significant efforts have been made to decrease the amount of iridium in OER catalysts without sacrificing their catalytic performances. In this frontier paper, we present the main common issues relevant to the iridium-catalyzed OER, including catalytically active species, catalytic mechanisms and activity-stability relation. We also take iridium-based perovskites as an example, and summarize the recent theoretical and experimental advances in available strategies that can lead to highly efficient, low-iridium oxygen evolution electrocatalysts under acidic conditions. Finally, we propose the remaining challenges and future directions for exploring acidic OER catalysts.

Graphical abstract: Low-iridium electrocatalysts for acidic oxygen evolution

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Article information


Submitted
30 Jul 2020
Accepted
01 Oct 2020
First published
07 Oct 2020

Dalton Trans., 2020,49, 15568-15573
Article type
Frontier

Low-iridium electrocatalysts for acidic oxygen evolution

M. Fan, X. Liang, H. Chen and X. Zou, Dalton Trans., 2020, 49, 15568
DOI: 10.1039/D0DT02676J

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