title: A Flexible Platform Containing Graphene Mesoporous Structure and Carbon Nanotube for Hydrogen Evolution.
abstract: It is of great significance to design a platform with large surface area and high electrical conductivity for poorly conductive catalyst for hydrogen evolution reaction (HER), such as molybdenum sulfide (MoSx), a promising and cost-effective nonprecious material. Here, the design and preparation of a free-standing and tunable graphene mesoporous structure/single-walled carbon nanotube (GMS/SWCNT) hybrid membrane is reported. Amorphous MoSxis electrodeposited on this platform through a wet chemical process under mild temperature. For MoSx@GMS/SWCNT hybrid electrode with a low catalyst loading of 32 μg cm-2, the onset potential is near 113 mV versus reversible hydrogen electrode (RHE) and a high current density of ≈71 mA cm-2is achieved at 250 mV versus RHE. The excellent HER performance can be attributed to the large surface area for MoSxdeposition, as well as the efficient electron transport and abundant active sites on the amorphous MoSxsurface. This novel catalyst is found to outperform most previously reported MoSx-based HER catalysts. Moreover, the flexibility of the electrode facilitates its stable catalytic performance even in extremely distorted states.
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China.
authors.forename: Rujing
authors.initials: R
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China; Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Li
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China.
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China; Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China.
authors.forename: Shuyuan
authors.initials: S
authors.lastname: Lin
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China; Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Zhu
keywords: carbon nanotubes; graphene; hydrogen evolution; molybdenum sulfide