期刊
NATURE COMMUNICATIONS
卷 9, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-03380-z
关键词
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资金
- China Ministry of Science and Technology [2016YFA (0202801), 2014CB932400, 2017YFB0701600]
- National Natural Science Foundation of China [21521091, 21390393, U1463202, 21471089, 21671117, 51232005]
- Shenzhen Projects for Basic Research [KQCX20140521161756227, JCYJ20170412171430026]
Development of single-atomic-site catalysts with high metal loading is highly desirable but proved to be very challenging. Although utilizing defects on supports to stabilize independent metal atoms has become a powerful method to fabricate single-atomic-site catalysts, little attention has been devoted to cation vacancy defects. Here we report a nickel hydroxide nanoboard with abundant Ni2+ vacancy defects serving as the practical support to achieve a single-atomic-site Pt catalyst (Pt-1/Ni(OH)(x)) containing Pt up to 2.3 wt% just by a simple wet impregnation method. The Ni2+ vacancies are found to have strong stabilizing effect of single-atomic Pt species, which is determined by X-ray absorption spectrometry analyses and density functional theory calculations. This Pt-1/Ni(OH)(x) catalyst shows a high catalytic efficiency in diboration of a variety of alkynes and alkenes, yielding an overall turnover frequency value upon reaction completion for phenylacetylene of similar to 3000 h(-1), which is much higher than other reported heterogeneous catalysts.
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