Increased 1T-MoS2 in MoS2 @CoS2/G composite for high-efficiency hydrogen evolution reaction

Cao, Kuo; Sun, Shiwei; Song, Aiying; Ba, Jinxiao; Lin, Haowen; Yu, Xianghai; Xu, Chengqun; Jin, Bingjun; Huang, Jan; Fan, Donghua

doi:10.1016/j.jallcom.2022.164539

Cited by 16 publications

(8 citation statements)

References 38 publications

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“…This indicates that there is a synergistic effect between the Co 9 S 8 and the MoS 2 which facilitates the hydrogen evolution reaction. In addition, the activity of the Co 9 S 8 /MoS 2 catalysts fabricated in this work is better than the overpotential values of most relevant heterojunction materials reported in the literature ( Table 1 ) [ 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 ]. The Tafel slope of the Co 9 S 8 /MoS 2 is 92.6 mV dec −1 , which is lower than that of the Co 9 S 8 at 106.1 mV dec −1 or the MoS 2 at 127.8 mV dec −1 ( Figure 7 b).…”

Section: Resultsmentioning

confidence: 56%

Charge Redistribution of Co9S8/MoS2 Heterojunction Microsphere Enhances Electrocatalytic Hydrogen Evolution

Zhang

et al. 2023

Biomimetics

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The electrocatalytic hydrogen evolution activity of transition metal sulfide heterojunctions are significantly increased when compared with that of a single component, but the mechanism behind the performance enhancement and the preparation of catalysts with specific morphologies still need to be explored. Here, we prepared a Co9S8/MoS2 heterojunction with microsphere morphology consisting of thin nanosheets using a facile two-step method. There is electron transfer between the Co9S8 and MoS2 of the heterojunction, thus realizing the redistribution of charge. After the formation of the heterojunction, the density of states near the Fermi surface increases, the d-band center of the transition metal moves downward, and the adsorption of both water molecules and hydrogen by the catalyst are optimized. As a result, the overpotential of Co9S8/MoS2 is superior to that of most relevant electrocatalysts reported in the literature. This work provides insight into the synergistic mechanisms of heterojunctions and their morphological regulation.

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Section: Resultsmentioning

confidence: 56%

Charge Redistribution of Co9S8/MoS2 Heterojunction Microsphere Enhances Electrocatalytic Hydrogen Evolution

Zhang

et al. 2023

Biomimetics

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“…The semiconducting 2H-MoS 2 has trigonal prismatic coordination, while the local Mo-S configuration in metallic 1T-MoS 2 is octahedral. 53 The 2 Â 2 supercell of the CoS 2 (100) surface [see Fig. 1(c)] is used to construct the MoS 2 /CoS 2 heterostructures.…”

Section: Construction Of Mos 2 /Cos 2 Heterostructuresmentioning

confidence: 99%

“…As a result, 1T-MoS 2 exhibits better HER performance than 2H-MoS 2 . 53,54 Also, both 2H-MoS 2 /CoS 2 (2H-HS) and 1T-MoS 2 / CoS 2 (1T-HS) heterostructures can be synthesized in experiments. 53,[55][56][57] The structural models of the constructed 2H-HS and 1T-HS are shown in Fig.…”

Section: Construction Of Mos 2 /Cos 2 Heterostructuresmentioning

confidence: 99%

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Interface prompted highly efficient hydrogen evolution of MoS₂/CoS₂heterostructures in a wide pH range

Sun

Wang³

et al. 2023

Phys. Chem. Chem. Phys.

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“…In addition, only the diffraction peaks of 2H-MoS 2 could be detected when the 1T phase content in 2H/1T-MoS 2 is low, and the existence of the 1T phase needs to be further determined by Raman or XPS (Cao et al, 2022). Raman spectroscopy is a simple and effective technique to determine the existence of 1T-MoS 2 .…”

Section: Characterization Techniques For 1t-mosmentioning

confidence: 99%

Recent progress of electrochemical hydrogen evolution over 1T-MoS2 catalysts

et al. 2022

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Developing efficient and stable non-noble metal catalysts for the electrocatalytic hydrogen evolution reaction (HER) is of great significance. MoS2 has become a promising alternative to replace Pt-based electrocatalysts due to its unique layered structure and adjustable electronic property. However, most of the reported 2H-MoS2 materials are stable, but the catalytic activity is not very ideal. Therefore, a series of strategies such as phase modulation, element doping, defect engineering, and composite modification have been developed to improve the catalytic performance of MoS2 in the HER. Among them, phase engineering of 2H-MoS2 to 1T-MoS2 is considered to be the most effective strategy for regulating electronic properties and increasing active sites. Hence, in this mini-review, the common phase modulation strategies, characterization methods, and application of 1T-MoS2 in the HER were systematically summarized. In addition, some challenges and future directions are also proposed for the design of efficient and stable 1T-MoS2 HER catalysts. We hope this mini-review will be helpful to researchers currently working in or about to enter the field.

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Increased 1T-MoS2 in MoS2 @CoS2/G composite for high-efficiency hydrogen evolution reaction

Cited by 16 publications

References 38 publications

Charge Redistribution of Co9S8/MoS2 Heterojunction Microsphere Enhances Electrocatalytic Hydrogen Evolution

Charge Redistribution of Co9S8/MoS2 Heterojunction Microsphere Enhances Electrocatalytic Hydrogen Evolution

Interface prompted highly efficient hydrogen evolution of MoS₂/CoS₂heterostructures in a wide pH range

Recent progress of electrochemical hydrogen evolution over 1T-MoS2 catalysts

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Increased 1T-MoS2 in MoS2 @CoS2/G composite for high-efficiency hydrogen evolution reaction

Cited by 16 publications

References 38 publications

Charge Redistribution of Co9S8/MoS2 Heterojunction Microsphere Enhances Electrocatalytic Hydrogen Evolution

Charge Redistribution of Co9S8/MoS2 Heterojunction Microsphere Enhances Electrocatalytic Hydrogen Evolution

Interface prompted highly efficient hydrogen evolution of MoS2/CoS2heterostructures in a wide pH range

Recent progress of electrochemical hydrogen evolution over 1T-MoS2 catalysts

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Interface prompted highly efficient hydrogen evolution of MoS₂/CoS₂heterostructures in a wide pH range