Issue 9, 2021

Lattice oxygen redox chemistry in solid-state electrocatalysts for water oxidation

Abstract

Fundamental understanding of oxygen evolution reaction (OER) is of vital importance as it dominates the overall efficiency of water electrolysis – a compelling technique for sustainable production of hydrogen feedstock. Recently, a lattice oxygen-mediated mechanism (LOM) derived from lattice oxygen redox chemistry has received a lot of attention as it can rationalize the highly intrinsic activity and surface reconstruction issue in solid-state electrocatalyst alternatives with high metal–oxygen covalency. The physicochemical fundamentals of LOM further guide the exploration of efficient OER electrocatalysts. In this review, we comprehensively summarize the recent progress in lattice oxygen redox chemistry in solid-state OER electrocatalysts and its induced LOM. We begin with a brief introduction of LOM together with proposed pathways, and discuss the fundamental correlations between electronic structure of catalysts and OER mechanism to provide several electronic descriptors. Subsequently, we summarize the strategies for triggering lattice oxygen redox chemistry to promote the intrinsic OER activity, together with the theoretical calculations and experimental measurements for corroboration of lattice oxygen oxidation. Finally, we offer an outlook of the remaining challenges and future perspectives towards lattice oxygen redox chemistry in OER electrocatalysts. We anticipate that this review can inspire researchers to develop this attractive research area together.

Graphical abstract: Lattice oxygen redox chemistry in solid-state electrocatalysts for water oxidation

Article information

Article type
Review Article
Submitted
28 apr 2021
Accepted
17 jun 2021
First published
18 jun 2021

Energy Environ. Sci., 2021,14, 4647-4671

Lattice oxygen redox chemistry in solid-state electrocatalysts for water oxidation

N. Zhang and Y. Chai, Energy Environ. Sci., 2021, 14, 4647 DOI: 10.1039/D1EE01277K

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