Activating the MoS₂ Basal Plane by Controllable Fabrication of Pores for an Enhanced Hydrogen Evolution Reaction

Abstract

Molybdenum disulfide has drawn persistent interest as a promising nonprecious electrocatalyst alternative to Pt for the hydrogen evolution reaction (HER). However, the MoS2 catalytic efficiency is still lower than the Pt‐based catalysts owing to insufficient active sites with more inert basal planes. Herein, we designed and synthesized porous MoS2 nanosheets to activate the basal planes by etching away Al in Al‐doped MoS2. The optimized porous MoS2 shows a small onset overpotential as low as 136 mV, a large cathode current density of 10 mA cm−2 at η=201 mV, a low Tafel slope of 62 mV decade−1, and a high TOF of 0.29 H2 s−1 per active site at η=200 mV. This study opens up new avenues for designing electrocatalysts based on porous MoS2 or other layered materials with enhanced HER performance.

Highly Porous MIL-100(Fe) for the Hydrogen Evolution Reaction (HER) in Acidic and Basic Media

“…Hence, among the various alternative processes, the electrochemical reduction method is considered to be effective to produce H 2 on a larger scale. The advantage of this hydrogen evolution reaction (HER) by electrochemical process is its simplicity and high stability. , A desirable cathodic H 2 reaction needs good electroactivity, stability, high surface area, and operability at a low potential. To reduce the overpotential of water electrolysis, the same is done by manipulation of the electrolyte and electrode materials.…”

Ion-Electron Transduction Layer of the SnS2-MoS2 Heterojunction to Elevate Superior Interface Stability for All-Solid Sodium-Ion Selective Electrode

“…This indicates the presence of both Mo 3+ and Mo 4+ in the SnS 2 -MoS 2 , implying a structural vacancy on its surface. 32 The peak of MoS 2 at 225.7 eV belongs to the S 2s peak of the Mo−S bond. Following the introduction of Sn, this peak divides into two separate peaks at 225.4 and 226.5 eV, which belong to the Mo−S bond and Sn−S bond in the SnS 2 -MoS 2 bond, respectively.…”

A concise discussion on MoS2basal plane activation toward the ennoblement of electrocatalytic HER output

“…It has been observed that throughout the doping and etching method, one can successfully activate the basal plane of MoS 2 by introducing pores, thus increasing its surface area. In this regard, Geng et al 64 designed Al–MoS 2 nanosheets by doping different amounts of aluminium (Fig. 3a–d), followed by the traditional one-step hydrothermal method.…”