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Cation vacancy stabilization of single-atomic-site Pt(1)/Ni(OH)(x) catalyst for diboration of alkynes and alkenes

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 dev...

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Detalles Bibliográficos
Autores principales: Zhang, Jian, Wu, Xi, Cheong, Weng-Chon, Chen, Wenxing, Lin, Rui, Li, Jia, Zheng, Lirong, Yan, Wensheng, Gu, Lin, Chen, Chen, Peng, Qing, Wang, Dingsheng, Li, Yadong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5843605/
https://www.ncbi.nlm.nih.gov/pubmed/29520021
http://dx.doi.org/10.1038/s41467-018-03380-z
Descripción
Sumario: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 Ni(2+) 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 Ni(2+) 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 ~3000 h(−1), which is much higher than other reported heterogeneous catalysts.