Cation vacancy stabilization of single-atomic-site Pt1/Ni(OH)x catalyst for diboration of alkynes and alkenes

Jian Zhang, Xi Wu, Weng-Chon Cheong, Wenxing Chen, Rui Lin, Jia Li, Lirong Zheng, Wensheng Yan, Lin Gu, Chen Chen, Qing Peng, Dingsheng Wang () and Yadong Li ()
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Jian Zhang: Tsinghua University
Xi Wu: Tsinghua University
Weng-Chon Cheong: Tsinghua University
Wenxing Chen: Tsinghua University
Rui Lin: Tsinghua University
Jia Li: Tsinghua University
Lirong Zheng: Chinese Academy of Sciences
Wensheng Yan: University of Science and Technology of China
Lin Gu: Chinese Academy of Sciences
Chen Chen: Tsinghua University
Qing Peng: Tsinghua University
Dingsheng Wang: Tsinghua University
Yadong Li: Tsinghua University

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract 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 (Pt1/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 Pt1/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 ~3000 h−1, which is much higher than other reported heterogeneous catalysts.

Date: 2018
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DOI: 10.1038/s41467-018-03380-z

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