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 MoSx is 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−2 is achieved at 250 mV versus RHE. The excellent HER performance can be attributed to the large surface area for MoSx deposition, as well as the efficient electron transport and abundant active sites on the amorphous MoSx surface. 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.

Graphene Nanoarchitectonics: Recent Advances in Graphene‐Based Electrocatalysts for Hydrogen Evolution Reaction

“…Another study from Zhu's group reported the electrodeposition of similar catalysts on a free-standing and binder-free hybrid membrane composed of mesoporous graphene and single-walled CNTs. [78] In such a nanostructure, the mesoporous graphene/SWCNT membrane was uniformly assembled and exhibited good flexibility, while the active sites were homogeneously distributed on its surface.…”

Molybdenum Carbide Nanoparticles Coated into the Graphene Wrapping N‐Doped Porous Carbon Microspheres for Highly Efficient Electrocatalytic Hydrogen Evolution Both in Acidic and Alkaline Media

“…Although the Pt‐based materials have been proven to be the most efficient electrocatalysts for hydrogen evolution reaction (HER), the high cost, limited supply, and poor durability hinder their global‐scale application . Therefore, much effort has been dedicated to develop robust nonnoble‐metal HER catalysts, such as cobalt‐, nickel‐, iron‐, tungsten‐, and molybdenum‐based materials.…”

“…DOI: 10.1002/advs.201700733 most efficient electrocatalysts for hydrogen evolution reaction (HER), the high cost, limited supply, and poor durability hinder their global-scale application. [3,4] Therefore, much effort has been dedicated to develop robust nonnoble-metal HER catalysts, [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] such as cobalt-, nickel-, iron-, tungsten-, and molybdenum-based materials.…”

A Bubble‐Derived Strategy to Prepare Multiple Graphene‐Based Porous Materials

“…Synthesis of BGF : Fabrication and purification of GO dispersion were conducted using a modified Hummers method as done in the previous report . First, 1 wt% F127 aqueous solution was stirred vigorously with the whisk for 1 min.…”