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

被引：21
|
作者：
Wang, Pai [1 ]
Zhang, Hongxu [1 ]
Wang, Peisen [1 ]
Zha, Junjie [1 ]
Gautam, Jagadis [1 ]
Zhang, Hanzhi [1 ]
Li, Rui [1 ]
Zhang, Lu-nan [1 ]
Diao, Guowang [1 ]
Ni, Lubin [1 ]
机构：
[1] Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 225002, Jiangsu, Peoples R China
来源：
CATALYSIS COMMUNICATIONS | 2022年 / 165卷
基金：
中国国家自然科学基金;
关键词：
Polyoxometalate; Supramolecular; Crown ether; Electrocatalysis; Hydrogen evolution reaction (HER); METAL-ORGANIC FRAMEWORKS; HYBRID;
D O I：
10.1016/j.catcom.2022.106446
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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 eta 10 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.
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页数：6
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