Laser synthesis of oxygen vacancy-modified CoOOH for highly efficient oxygen evolution

Introducing oxygen vacancies into transition-metal oxide materials would improve their catalytic activity but usually needs high-temperature or high-pressure conditions, and multi-step procedures, and thus are time consuming and not energy efficient. Herein, laser ablation in liquids (LAL), a green,...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2019-03, Vol.55 (2), p.294-297
Main Authors: Meng, Chao, Lin, Mengchang, Sun, Xuechun, Chen, Xiaodong, Chen, Xuemin, Du, Xiwen, Zhou, Yue
Format: Article
Language:English
Subjects:
Catalysis
Catalytic activity
Electrical resistivity
High temperature
Laser ablation
Nanostructure
Noble metals
Oxidation
Oxygen evolution reactions
Thickness
Transition metal oxides
Transition metals
Vacancies
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Summary:Introducing oxygen vacancies into transition-metal oxide materials would improve their catalytic activity but usually needs high-temperature or high-pressure conditions, and multi-step procedures, and thus are time consuming and not energy efficient. Herein, laser ablation in liquids (LAL), a green, mild and effective approach, has been, for the first time, employed to prepare CoOOH nanosheets with abundant oxygen vacancies and relatively thin thickness. Our theoretical and experimental results demonstrate that oxygen vacancies can optimize the absorption of oxygen evolution reaction (OER) intermediates and improve electrical conductivity; meanwhile, the relatively thin thickness can provide more active sites, thus leading to excellent OER activity of oxygen vacancy-modified CoOOH nanosheets. This work may provide guidance for exploring other efficient non-noble metal catalysts for water oxidation. Laser ablation in liquids has been, for the first time, employed to produce oxygen vacancy-modified CoOOH nanosheets for efficient water oxidation.
ISSN:1359-7345
1364-548X
DOI:10.1039/c8cc08951e