Constructing Heteroatom-Doped Transition-Metal Sulfide Heterostructures for Hydrogen Evolution Reaction

Abstract

Transition-metal sulfide (TMS) has been regarded as the most promising alternative to construct non-noble metal catalysts in the electrochemical hydrogen evolution reaction (HER). The excellent edge activation of MoS2 and abundant catalytic active sites of Ce2S3 can be utilized as the premise of constructing heterogeneous materials for electrochemical applications. Afterward, the heteroatoms (C, N, O, and Na) have been introduced to increase the original number of active sites (the number of the S–Mo–S on the edge molecular layer of MoS2 and exposed metal active center of Ce2S3). Additionally, the heterostructure of HAs@MoS2/Ce2S3 and ordered/amorphous carbon can enhance the activity by creating defects and localized disorder fields and accelerating the charge separation/transfer from cerium (Ce) sites to molybdenum (Mo) sites. Combining the above advantages, HAs@MoS2/Ce2S3 shows promising properties toward HER not only in acidic environments with a low overpotential (147.0 mV) but also in alkaline (160.5 mV) environments.

Internal and External Cultivation Strategy toward Efficient Electrochemical Oxygen Evolution in Cobalt Pentlandite

“…Additionally, Figure (c) compares the OER activity of the prepared electrocatalysts, and the V-CNFS/Ni 9 S 8 electrocatalyst provided the lowest overpotentials and Tafel slope. It is clear that V-CNFS/Ni 9 S 8 ensured rapid reaction kinetics and excellent intrinsic activity for the OER, making it superior to most non-noble metal OER electrocatalysts reported in the literature (Table S3).…”

Harnessing the Synergistic Power of Ce2S3/TiO2 S-Scheme Heterojunctions for Profound C–O Bond Cleavage in Lignin Model Compounds

“…The corresponding diffraction angles precisely coincide with those tabulated in the established reference pattern (JCPDS 21-1276). The diffraction peak attributed to Ce 2 S 3 in the composite configuration aligns meticulously with the established data from the JCPD 27-0204 card number, thereby validating the successful formation of the Ce 2 S 3 /TiO 2 composite structure.…”

Incorporation of Ruthenium Ions into Nanometer-Thick Films of Copper Sulfide by Anodization for Proton-Coupled Electron Transfer Reactions

“…Incessant efforts have been devoted to the search for acid-stable electrocatalysts that can replace costly and scarce platinum for electrochemical hydrogen production and hydrogen oxidation. Various materials based on transition-metal phosphides, nitrides, carbides, sulfides, metal–organic frameworks, and metallopolymers were explored for hydrogen evolution reactions with relatively good stability in acidic electrolytes. − Among these, transition-metal sulfide (TMS)-based electrocatalysts are extensively investigated for hydrogen evolution reactions due to their high exchange current density, stability in a wide pH range, abundant active sites, and tunable electrochemical properties. ,− …”

“…TMS are classified into layered metal sulfides and nonlayered metal sulfides. Their distinct morphology, exposure to more active sites, and composition could modulate the electrochemical activities. − Doping redox-active metal ions like Ni, Mo, W, Co, and Fe with different TMS forms a heteroatom coelectrocatalyst, which enhances the hydrogen evolution activity. Extensive efforts were made to modulate the electronic structures, redox activity, and local coordination environment in order to tune the interfacial charge transfer and electrochemical properties. − Moreover, the sulfur atom at the edge sites and sulfur vacancy at the basal plane of layered TMS contribute directly toward HER performance. − The lower coordination of the active metal shows a higher hydrogen evolution activity since sulfur vacancy generates a lower coordination on the transition metal, thus increasing the number of active sites .…”