Journal
CHEMICAL REVIEWS
Volume 121, Issue 21, Pages 13174-13212Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemrev.1c00234
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Funding
- National Basic Research Program of China [2017YFA0206702]
- Natural Science Foundation of China [21925110, 21890751, 91745113]
- National Program for Support of Top-Notch Young Professionals
- Fundamental Research Funds for the Central Universities [WK 2060190084]
- Major Program of Development Foundation of Hefei Center for Physical Science and Technology [2016FXZY001]
- Users with Excellence Project of Hefei Science Center CAS [2021HSC-UF004]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB36000000]
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Electrochemical water splitting for hydrogen generation is a promising pathway for renewable energy conversion. Developing cost-effective and highly efficient electrocatalysts to drive sluggish oxygen-evolution reaction (OER) at the anode side is crucial. The investigation of structural transformation during OER contributes to understanding accurate catalytic mechanisms and benefiting the rational design of catalytic materials.
Electrochemical water splitting for hydrogen generation is a promising pathway for renewable energy conversion and storage. One of the most important issues for efficient water splitting is to develop cost-effective and highly efficient electrocatalysts to drive sluggish oxygen-evolution reaction (OER) at the anode side. Notably, structural transformation such as surface oxidation of metals or metal nonoxide compounds and surface amorphization of some metal oxides during OER have attracted growing attention in recent years. The investigation of structural transformation in OER will contribute to the indepth understanding of accurate catalytic mechanisms and will finally benefit the rational design of catalytic materials with high activity. In this Review, we provide an overview of heterogeneous materials with obvious structural transformation during OER electrocatalysis. To gain insight into the essence of structural transformation, we summarize the driving forces and critical factors that affect the transformation process. In addition, advanced techniques that are used to probe chemical states and atomic structures of transformed surfaces are also introduced. We then discuss the structure of active species and the relationship between catalytic performance and structural properties of transformed materials. Finally, the challenges and prospects of heterogeneous OER electrocatalysis are presented.
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