Incorporation of active phase in porous MoS 2 for enhanced hydrogen evolution reaction
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Incorporation of active phase in porous MoS2 for enhanced hydrogen evolution reaction Wen Qiao1 · Tiantian Ma2 · Xiaoyong Xu3 · Liqian Wu1 · Shiming Yan1 · Dunhui Wang1 Received: 27 November 2019 / Accepted: 20 January 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Molybdenum disulfide (MoS2) has been considered to be a promising electrocatalyst for hydrogen evolution reaction (HER). Incorporation of 1 T phase is a strategy to allow basal planes of M oS2 nanosheets simultaneously possess highly active catalytic sites and metallic property. This strategy requires as many basal planes as possible to be exposed to the surface, thus enabling the active sites on the basal planes to participate in the catalytic reaction. Herein, we report a porous ultra-thin iO2 nanospheres template method. Ultra-thin MoS2 nanosheets grow 1 T phase M oS2 (1 T-MoS2) nanosheets prepared by a S laterally around the surface of S iO2 nanospheres. After etching S iO2, the rest porous ultra-thin M oS2 nanosheets ensure the maximized exposure of basal plane active sites. In addition, the metallic porous structure can also facilitate transport of mass in holes and transfer of electron on basal planes. The synergistic effect of these aspects endows our sample with improved hydrogen evolution capability. The onset overpotential at 1 mA/cm2 is 131 mV, and the corresponding Tafel slope is 63 mV/dec.
1 Introduction The prosperous industrial era has almost exhausted the reserves of fossil fuels. Current fuel shortage and extensive environmental pollution are urgent issues to be resolved. So far, great efforts have been made to develop efficient and available energy conversion technologies in an attempt to produce sustainable and renewable energy sources [1–3]. Among many attempts, electrocatalytic hydrolysis of water to produce hydrogen is generally considered to be a promising and practical method [4–13]. It is well known that Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10854-020-02959-x) contains supplementary material, which is available to authorized users. * Shiming Yan [email protected] * Dunhui Wang [email protected] 1
School of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, China
2
College of Science, Henan University of Technology, Zhengzhou 450001, China
3
School of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China
platinum (Pt) and Pt-based materials are the best electrocatalysts for hydrogen evolution reaction (HER); however, their scarcity and high cost greatly hinder their large-scale use [6]. Therefore, a major challenge in this field is the development of low-cost and high-performance electrocatalytic hydrogen evolution catalyst. Molybdenum disulfide ( MoS2), a layered structure of transition metal dichalcogenide, has emerged as a representative substituted material for Pt and Pt-based electrocatalysts because of its high natural abundance, lowcost, and goo
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