Formation of Yolk–Shell MoS 2 @void@Aluminosilica Microspheres with Enhanced Electrocatalytic Activity for Hydrogen Evolution Reaction

Li Li, Yuanyuan Zhao, Nanli Qiao, Zhengbao Yu and Yongxing Zhang ()
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Li Li: Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, Department of Materials Science and Engineering, Huaibei Normal University, Huaibei 235000, China
Yuanyuan Zhao: Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, Department of Materials Science and Engineering, Huaibei Normal University, Huaibei 235000, China
Nanli Qiao: Greenstar (Beijing) Environmental Technology Co., Ltd., Beijing 100176, China
Zhengbao Yu: Greenstar (Beijing) Environmental Technology Co., Ltd., Beijing 100176, China
Yongxing Zhang: Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, Department of Materials Science and Engineering, Huaibei Normal University, Huaibei 235000, China

Energies, 2022, vol. 15, issue 23, 1-11

Abstract: The development of low-cost electrode materials with enhanced activity and favorable durability for hydrogen evolution reactions (HERs) is a great challenge. MoS 2 is an effective electrocatalyst with a unique layered structure. In addition, aluminosilica shells can not only provide more hydroxyl groups but also improve the durability of the catalyst as a protective shell. Herein, we have designed a hard-template route to synthesize porous yolk–shell MoS 2 @void@Aluminosilica microspheres in a NaAlO 2 solution. The alkaline solution can directly etch silica (SiO 2 ) hard templates on the surface of MoS 2 microspheres and form a porous aluminosilica outer shell. The electrocatalytic results confirm that the MoS 2 @void@Aluminosilica microspheres exhibit higher electrocatalytic activity for HERs with lower overpotential (104 mV at the current density of −10 mA cm −2 ) and greater stability than MoS 2 microspheres. The superior electrocatalytic activity of MoS 2 @void@Aluminosilica microspheres is attributed to the unique structure of the yolk@void@shell geometric construction, the protection of the aluminosilica shell, and the greater number of active sites offered by their nanosheet subunits. The design of a unique structure and new protection strategy may set up a new method for preparing other excellent HER electrocatalytic materials.

Keywords: yolk–shell; MoS 2 @void@Aluminosilica microspheres; hydrogen evolution reaction; hydrothermal and hard template method (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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