A crown ether supramolecular host-guest complex with Keggin polyoxometalate: Synthesis, crystal structure and electrocatalytic performance for hydrogen evolution reaction

Pai Wang; Hongxu Zhang; Peisen Wang; Junjie Zha; Jagadis Gautam; Hanzhi Zhang; Rui Li; Lu-nan Zhang; Guowang Diao; Lubin Ni

Catalysis Communications (May 2022)

A crown ether supramolecular host-guest complex with Keggin polyoxometalate: Synthesis, crystal structure and electrocatalytic performance for hydrogen evolution reaction

Pai Wang,
Hongxu Zhang,
Peisen Wang,
Junjie Zha,
Jagadis Gautam,
Hanzhi Zhang,
Rui Li,
Lu-nan Zhang,
Guowang Diao,
Lubin Ni

Affiliations

Pai Wang: School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, Jiangsu, China
Hongxu Zhang: School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, Jiangsu, China
Peisen Wang: School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, Jiangsu, China
Junjie Zha: School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, Jiangsu, China
Jagadis Gautam: School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, Jiangsu, China
Hanzhi Zhang: School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, Jiangsu, China
Rui Li: School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, Jiangsu, China
Lu-nan Zhang: Corresponding authors.; School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, Jiangsu, China
Guowang Diao: School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, Jiangsu, China
Lubin Ni: Corresponding authors.; School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, Jiangsu, China

Journal volume & issue: Vol. 165
p. 106446

Abstract

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A new crown ether–polyoxometalate assembly [K(H24C12O6)]3[K(H24C12O6)(CH3CN)][SiMo12O40] (1) based on the Keggin-type polyanion [SiMo12O40]4− was successfully synthesized through one-pot strategy in acetonitrile solution. The polyanion is coordinated to two [K([18]-crown-6)]+ supramolecular cations via crown–K–O(POM) coordinate-covalent bonds, leading to the formation of a spindle-shaped discrete structure. Complex 1 exhibited good hydrogen evolution reaction (HER) activity in an acidic medium. Moreover, a small overpotential η10 of 120 mV and a Tafel slope of 112 mV dec−1 were obtained. This crown ether–polyoxometalate hybrid electrocatalyst also presented excellent HER stability even after 2000 cycles of operation.

Published in Catalysis Communications

ISSN: 1566-7367 (Print); 1873-3905 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry
Website: https://www.journals.elsevier.com/catalysis-communications

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