Monolayer MoS₂ Films Supported by 3D Nanoporous Metals for High‐Efficiency Electrocatalytic Hydrogen Production

Abstract

The "edge-free" monolayer MoS2 films supported by 3D nanoporous gold show high catalytic activities towards hydrogen evolution reaction (HER), originating from large out-of-plane strains that are geometrically required to manage the 3D curvature of bicontinuous nanoporosity. The large lattice bending leads to local semiconductor-to-metal transition of 2H MoS2 and the formation of catalytically active sites for HER.

3D Nanoporous Metal Phosphides toward High‐Efficiency Electrochemical Hydrogen Production

“…[ 34 ] Since np-Co 2 P is supportfree fl exible ribbons, they can be directly used as working electrodes without any binders and additives and inherently have better electric conductivity and electrochemical stability than conventional discrete particulate HER catalysts. [ 35,36 ] In the traditional dealloying process, the nanopores are formed by self-assembly of noble elements at electrode/electrolyte interfaces, [ 10 ] which require high diffusivity and low crystal formation energy of nanopore-forming materials and thus only nanoporous metals can be achieved. Different from the dealloying, the nanopore formation of np-Co 2 P is by selective dissolution of a less stable HCP cobalt phase, rather than a specifi c component element, and the remained Co 2 P compound with relatively high electrochemical stability forms the skeletons of the 3D nanoporous structure.…”

Two-Dimensional Material Molybdenum Disulfides as Electrocatalysts for Hydrogen Evolution

“…It has been Recently, great efforts have been dedicated to enhancing the electrocatalytic activities of TMDs in HER. Generally, there are three directions: the first is improving the catalytic activities of the edge sites; the second is exposing or increasing the number of active edge sites; the third is optimizing the electronic structure or improving the electrical conductivity of the catalyst [35][36][37][38]. This review attempts to summarize the recent progress in nanostructured MoS 2 as representative TMD electrocatalysts toward the HER.…”

Controllable nanoscale engineering of vertically aligned MoS2 ultrathin nanosheets by nitrogen doping of 3D graphene hydrogel for improved electrocatalytic hydrogen evolution

“…However, the extremely low electrical conductivity of MoS 2 nanostructure, especially along the adjacent interlayers hampers the electron transfer for highly efficient HER. Further improvement of the HER performance of MoS 2 is possible by introducing highly conductive substrate material such as nanoporous carbon [23], carbon nanotube (CNT) [24e26], nanoporous metal [27] or graphene [28e31] to facilitate electron transfer process at the interfaces. Recently, three-dimensional (3D) conductive graphene networks, a framework of interconnected graphene sheets, has been considered as an effective substrate for loading and confining MoS 2 for HER performance improvement due to its prominent properties including large specific surface area, strong mechanical strength, remarkable electronic conductivity and fast mass and electron transport kinetics [32e36].…”