Edge‐Terminated MoS₂ Nanoassembled Electrocatalyst via In Situ Hybridization with 3D Carbon Network

Abstract

Transition metal dichalcogenides, especially MoS , are considered as promising electrocatalysts for hydrogen evolution reaction (HER). Since the physicochemical properties of MoS and electrode morphology are highly sensitive factor for HER performance, designed synthesis is highly pursued. Here, an in situ method to prepare a 3D carbon/MoS hybrid catalyst, motivated by the graphene ribbon synthesis process, is reported. By rational design strategies, the hybrid electrocatalysts with cross-connected porous structure are obtained, and they show a high HER activity even comparable to the state-of-the-art MoS catalyst without appreciable activity loss in long-term operations. Based on various physicochemical techniques, it is demonstrated that the synthetic procedure can effectively guide the formation of active site and 3D structure with a distinctive feature; increased exposure of active sites by decreased domain size and intrinsically high activity through controlling the number of stacking layers. Moreover, the importance of structural properties of the MoS -based catalysts is verified by controlled experiments, validating the effectiveness of the designed synthesis approach.

Active Pore-Edge Engineering of Single-Layer Niobium Diselenide Porous Nanosheets Electrode for Hydrogen Evolution

“…The NbSe 2 PNS solution which mixed with Nafion was drop-casted on the carbon foam (CF) to fabricate the NbSe 2 PNS/CF electrode (Figure 2). The macropore-like structure of CF could increase the contact area of catalyst and electrolyte as well as improve the electrochemical property of the NbSe 2 PNS [36].…”

Optimization of the Hydrogen‐Adsorption Free Energy of Ru‐Based Catalysts towards High‐Efficiency Hydrogen Evolution Reaction at all pH

“…[3] Pt-based electrocatalysts have shown the highestp erformance towards the hydrogen evolution reaction( HER) process with almost no overpotential and robust stability, but its rarity and the high cost limit the practical application. [4,5] Non-Pt electrocatalysts, particularly the transition-metal compounds, including metal phosphides, [6][7][8][9][10] sulfides, [11,12] selenides, [13,14] carbides, [15] borides, [16] and nitrides [17] have increasingly aroused attention.U nfortunately, most of them have no Pt-like activity or only favorable activity in acid media. Considering the different environments in application, developing catalysts with outstanding catalytic per-formance andh igh stabilityi np H-universal solutions is an urgent need.…”

“…Pt‐based electrocatalysts have shown the highest performance towards the hydrogen evolution reaction (HER) process with almost no overpotential and robust stability, but its rarity and the high cost limit the practical application . Non‐Pt electrocatalysts, particularly the transition‐metal compounds, including metal phosphides, sulfides, selenides, carbides, borides, and nitrides have increasingly aroused attention. Unfortunately, most of them have no Pt‐like activity or only favorable activity in acid media.…”

Anion Extraction-Induced Polymorph Control of Transition Metal Dichalcogenides

“…(a) Effect of 1T phase on the HER catalytic activity of MoS 2 /CNFs with LSV. (b) Comparing the HER performances of MoS 2 -based electrocatalysts in terms of the potential at 10 mA/cm 2 and Tafel slope. ,,− ,,− ,,,,− …”