A Solvent‐Free Strategy to Synthesize MoS₂/Mo₂C‐Embedded, N, S Co‐Doped Mesoporous Carbon as Electrocatalysts for Hydrogen Evolution

Abstract

A solvent-free strategy was developed to synthesize MoS 2 / Mo 2 C embedded, N, S co-doped carbon via a green and environmentally friendly process. The precursors were blended and carbonized under the inert atmosphere. Water and other solvents were not involved in the whole synthesis process. According to the characterization results, the as-received samples consisted of Mo 2 C, MoS 2 , and carbon with mesoporous structures. Moreover, the obtained sample possessed a high BET surface area (373.3 m 2 g À 1 ), as well as high electrochemical active surface area (145.4 mF cm À 2 ). When utilized as the electrocatalyst towards hydrogen evolution reaction (HER), the optimal sample of T2.0G4.0Mo1.0 revealed superior electrochemical activity in alkaline media, which could show a low overpotential and an excellent stability.

过渡金属碳化物在电催化析氢反应中的研究进展

“…该催化剂在碱性介质中具有优异的析氢 性能, 其原因主要归结于: (1)材料具有不规则的介孔 结构和较高的比表面积. (2)MoS2 和 Mo2C 异质结有 效提高了电荷转移速率, 增加了电化学活性面积 [109] .…”

Novel WS2/Co9S8 nanoparticles supported on N, S co‐doped mesoporous carbon as efficient electrocatalyst for hydrogen evolution reaction

“…The introduction of these inorganic salts can reduce the synthesis cost, which can also be recycled [24,25] . In our prior reports, various cobalt sulfide‐based electrocatalysts for HER were synthesized via the molten salts process, which possessed outstanding HER performance due to high surface area and pore volume (Table S1) [26–29] . However, with the rapid development of lithium‐ion battery industry, the price of cobalt‐containing minerals and raw materials remains high.…”

“…[24,25] In our prior reports, various cobalt sulfide-based electrocatalysts for HER were synthesized via the molten salts process, which possessed outstanding HER performance due to high surface area and pore volume (Table S1). [26][27][28][29] However, with the rapid development of lithium-ion battery industry, the price of cobalt-containing minerals and raw materials remains high. Doping some transition metals with lower price in cobalt sulfide material can greatly reduce the synthesis cost of catalyst.…”