Recent Developments on Cr‐Based Electrocatalysts for the Oxygen Evolution Reaction in Alkaline Media

Among a plethora of transition‐metal catalysts explored for the oxygen evolution reaction (OER) in water electrolysis, the use of chromium (Cr) as a component, has only recently started to gain momentum. In this review, recent investigations where Cr has been utilised for alkaline OER has been summa...

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Bibliographic Details
Published in:ChemCatChem 2022-08, Vol.14 (15), p.n/a
Main Authors: Babu, Sreejith P., Falch, Anzel
Format: Article
Language:English
Subjects:
Alkaline water electrolysers
Catalysts
Chromium
Electrocatalysts
Electrolysis
Heterogenous catalysis
Oxidation
Oxygen evolution
Oxygen evolution reactions
Water oxidation
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Summary:Among a plethora of transition‐metal catalysts explored for the oxygen evolution reaction (OER) in water electrolysis, the use of chromium (Cr) as a component, has only recently started to gain momentum. In this review, recent investigations where Cr has been utilised for alkaline OER has been summarised and evaluated. The Cr‐based electrocatalysts have been categorised and discussed according to their anion counterparts. From the majority of reviewed studies, Cr comes across as a beneficial co‐catalyst owing to its ability to act as either an electron acceptor or electron donor. This characteristic property stems from the many possible oxidation states of Cr, with Cr3+ and Cr6+ being the most pronounced states. This review emphasises on providing a holistic view of the role Cr plays in OER electrocatalysis, focussing mainly on the correlations of activity, structure, and electronic configuration. Co‐catalyst chromium: The influence of Chromium, as a co‐catalyst component in functional materials, for the oxygen evolution reaction in alkaline media has a definite, positive impact on accelerating the OER capability of active metals such as Ni and Fe.
ISSN:1867-3880
1867-3899
DOI:10.1002/cctc.202200364