Fabricating polyoxometalates-stabilized single-atom site catalysts in confined space with enhanced activity for alkynes diboration

Yiwei Liu, Xi Wu, Zhi Li, Jian Zhang, Shu-Xia Liu, Shoujie Liu, Lin Gu, Li Rong Zheng, Jia Li (), Dingsheng Wang () and Yadong Li ()
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Yiwei Liu: Tsinghua University
Xi Wu: Tsinghua University
Zhi Li: Tsinghua University
Jian Zhang: Tsinghua University
Shu-Xia Liu: Northeast Normal University
Shoujie Liu: Anhui Normal University
Lin Gu: Chinese Academy of Sciences
Li Rong Zheng: Chinese Academy of Sciences
Jia Li: Tsinghua University
Dingsheng Wang: Tsinghua University
Yadong Li: Tsinghua University

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract Effecting the synergistic function of single metal atom sites and their supports is of great importance to achieve high-performance catalysts. Herein, we successfully fabricate polyoxometalates (POMs)-stabilized atomically dispersed platinum sites by employing three-dimensional metal-organic frameworks (MOFs) as the finite spatial skeleton to govern the accessible quantity, spatial dispersion, and mobility of metal precursors around each POM unit. The isolated single platinum atoms (Pt1) are steadily anchored in the square-planar sites on the surface of monodispersed Keggin-type phosphomolybdic acid (PMo) in the cavities of various MOFs, including MIL-101, HKUST-1, and ZIF-67. In contrast, either the absence of POMs or MOFs yielded only platinum nanoparticles. Pt1-PMo@MIL-101 are seven times more active than the corresponding nanoparticles in the diboration of phenylacetylene, which can be attributed to the synergistic effect of the preconcentration of organic reaction substrates by porous MOFs skeleton and the decreased desorption energy of products on isolated Pt atom sites.

Date: 2021
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DOI: 10.1038/s41467-021-24513-x

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