Support interactions dictated active edge sites over MoS₂–carbon composites for hydrogen evolution

Abstract

Support interactions are critical for controlling the density of exposed MoS2 edge sites and the reactivity for HER.

Emerging transition metal and carbon nanomaterial hybrids as electrocatalysts for water splitting: a brief review

“…Moreover, the activity of this material can be improved by increasing its electrical conductivity to facilitate electron transfer and forming large electrolyte ion adsorption/desorption sites through increasing the number of active edges via minimizing the size, shape, and dimensions of MoS 2 to reduce free energy for hydrogen adsorption. 84,108,[112][113][114] In this regard, supporting MoS 2 based materials on highly conducting and stable carbon nanomaterials supports [115][116][117][118][119][120] is an efficient way to improve the electrical conductivity, and rGO is considered one of the most attractive CNMs owing to its high conductivity, stability, and ability to act as backbone network for the synthesis of 3D dispersed catalytic materials. [121][122][123][124] The better HER performance uplift of rGO, as compared with hollow carbon nanospheres (HCNs), single walled carbon nanotubes (SWCNTs) and multi walled carbon nanotubes (MWCNTs), was confirmed by supporting MoS 2 on these carbon materials using simple hydrothermal method, 118 where the HER electrocatalytic activity of as obtained MoS 2 /C materials in 0.5 M H 2 SO 4 was reported in the order of MoS 2 / rGO 4 MoS 2 /HNCs 4 MoS 2 /SWCNTs 4 MoS 2 /MWCNTs.…”

Binder free construction of hollow hierarchical Mn–Co–P nanoarrays on nickel foam as an efficient bifunctional electrocatalyst for overall water splitting

“…Hence, it is highly imperative to exploit and develop earth-abundant electrocatalysts to realize low-cost, high-efficiency and stable hydrogen production by electrolysis of water. 12–15…”

Hierarchically Ordinated Two-Dimensional MoS2 Nanosheets on Three-Dimensional Reduced Graphene Oxide Aerogels as Highly Active and Stable Catalysts for Hydrogen Evolution Reaction

“…Structural engineering of MoS 2 through the miniaturization of its size, shape, and dimensions is an effective and viable strategy for dramatically increasing the total number of edge sites, which are related to catalytic active sites. Mo-edge sites of MoS 2 can provide high electrochemical activity and exhibit the low free energy of hydrogen adsorption (∆G H * ) compared to inert adsorption sites at the basal plane of MoS 2 [10,31,[35][36][37]. Therefore, many studies have focused on vertically grown MoS 2 sheets, MoS 2 nanostructures of different shapes, and various MoS 2 heterostructures for achieving a high density of edge sites [31,[38][39][40][41][42][43].…”