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Issue 11, 2019
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Anionic defect engineering of transition metal oxides for oxygen reduction and evolution reactions

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Abstract

The development of cost-effective catalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is crucial for enhancing the energy efficiency of many electrochemical energy conversion and storage devices. Owing to their low cost and high activity, transition metal oxides have attracted much attention as alternative electrocatalysts to replace the currently used noble metal-based catalysts. Anion defects (e.g., oxygen vacancies, interstitials, and anion dopants) can significantly change the electronic structure of oxides or the stability of adsorbed intermediates, thus greatly enhancing the electrocatalytic activities of the oxide surface. Anionic defect engineering represents a potential new direction for rational design of high-performance electrocatalysts. In this review, recent progress in manipulating the anion defects in transition metal oxides for enhancing their activity and stability is summarized and the proposed mechanisms for enhanced performance are discussed in detail. Challenges and prospects are also discussed in the development of a new generation of highly efficient ORR and OER electrocatalysts.

Graphical abstract: Anionic defect engineering of transition metal oxides for oxygen reduction and evolution reactions

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Article information


Submitted
28 Dec 2018
Accepted
14 Feb 2019
First published
14 Feb 2019

J. Mater. Chem. A, 2019,7, 5875-5897
Article type
Review Article

Anionic defect engineering of transition metal oxides for oxygen reduction and evolution reactions

Y. Zhu, X. Liu, S. Jin, H. Chen, W. Lee, M. Liu and Y. Chen, J. Mater. Chem. A, 2019, 7, 5875
DOI: 10.1039/C8TA12477A

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