期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 138, 期 20, 页码 6517-6524出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.6b01606
关键词
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资金
- Ministry of Science and Technology of China [2014CB239402, 2013CB834505]
- Chinese Academy of Sciences [KGZD-EW-T05]
- National Natural Science Foundation of China [21401206, 51322213, 51172245, 51572270, 21301183, 21401207]
- Beijing Natural Science Foundation [2152033, 2154058]
- National Program for Support of Top-notch Young Professionals
Faceted NiO nanoparticles preferentially exposing high surface energy planes demand attention due to their excellent electrocatalytic properties. However, the activity of faceted NiO nanoparticles generally remains suboptimal due to their large lateral size and thickness, which severely limits the availability of coordinatively unsaturated active reactive edge and corner sites. Here, ultrafine NiO nanosheets with a platelet size of similar to 4.0 nm and thickness (similar to 1.1 nm) stabilized by TiO2 were successfully prepared by calcination of a monolayer layered double hydroxide precursor. The ultrafine NiO nanosheets displayed outstanding performance in electrochemical water oxidation due to a high proportion of reactive NiO {110} facets, intrinsic Ni3+ and Ti3+ sites, and abundant interfaces, which act synergistically to promote H2O adsorption and facilitate charge-transfer.
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