Hollow Structured Micro/Nano MoS₂ Spheres for High Electrocatalytic Activity Hydrogen Evolution Reaction

Abstract

Molybdenum disulfide (MoS2) has attracted extensive attention as a non-noble metal electrocatalyst for hydrogen evolution reaction (HER). Controlling the skeleton structure at the nanoscale is paramount to increase the number of active sites at the surface. However, hydrothermal synthesis favors the presence of the basal plane, limiting the efficiency of catalytic reaction. In this work, perfect hollow MoS2 microspheres capped by hollow MoS2 nanospheres (hH-MoS2) were obtained for the first time, which creates an opportunity for improving the HER electrocatalytic performance. Benefiting from the controllable hollow skeleton structure and large exposed edge sites, high-efficiency HER activity was obtained for stacked MoS2 thin shells with a mild degree of disorder, proving the presence of rich active sites and the validity of the combined structure. In general, the obtained hollow micro/nano MoS2 nanomaterial exhibits optimized electrocatalytic activity for HER with onset overpotential as low as 112 mV, low Tafel slope of 74 mV decade(-1), high current density of 10 mA cm(-2) at η = 214 mV, and high TOF of 0.11 H2 s(-1) per active site at η = 200 mV.

Nickel@Nitrogen‐Doped Carbon@MoS2 Nanosheets: An Efficient Electrocatalyst for Hydrogen Evolution Reaction

“…MoS 2 nanosheets have attracted extensive attention as HER catalysts due to the rich active sites on the exposed edges of the nanosheets . However, the inherent stacking trend by van der Waals forces among MoS 2 layers greatly limits the number of exposed active sites.…”

Morphology‐Controlled Synthesis of Molybdenum Disulfide Wrapped Single‐Walled Carbon Nanotubes for the Hydrogen Evolution Reaction

“…Our analyses demonstrate that the nanorods (1:1) have much larger C dl values than the other counterparts. As the C dl is expected to be linearly proportional to the ECSA, more effective active sites were exposed for MoS 2 /SWNTs nanorods (1:1) which lead to the excellent HER activity as demonstrated above.…”

MCNT/MoS2 promoting the electrochemical performance of lithium-sulfur batteries by adsorption polysulfide

“…A 1g (out-of-layer) vibrational modes of hexagonal MoS 2 [38,39], respectively. E 2g 1 peak position shifted from 379.3 cm −1 in MoS 2 to 380.8 cm −1 in MCNT/MoS 2 .…”