Cu–MoS2/rGO hybrid material for enhanced hydrogen evolution reaction performance

Wang, Kunchan; Zhan, Zhenxiang; Lei, Ting; Yin, Ping

doi:10.1016/j.ijhydene.2020.02.011

Cited by 39 publications

(19 citation statements)

References 47 publications

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“…Mn-MoS 2 -SV exhibits almost the same HER activity (an overpotential of 255 mV at 10 mA cm −2 ) compared to the MoS 2 -SV sample. Cu-MoS 2 -SV presents the highest performance, reaching a 197 mV overpotential at 10 mA cm −2 , which is consistent with the 199 mV reported by Wang et al 7 Nb-MoS 2 -SV shows the poorest performance, which requires an overpotential of 289 mV to reach a current density of 10 mA cm −2 .…”

Section: Electrochemical Performancesupporting

confidence: 90%

“…2 HER under acid and neutral conditions generally involves the transfer of two electrons and is generally composed of a Volmer step (H + + e − + * → H*, where * denotes an active site on the catalyst surface), a Heyrovsky step (H* + H + + e − → H 2 + *), or a Tafel step (H* + H* → H 2 + 2*). 7 For electrocatalysis, it is crucial to explore catalysts with excellent activity, high selectivity, and high durability. Recently, two-dimensional materials with unique structures and superior electrical properties, 8−10 such as graphene, 11,12 h-BN, 13 layered oxides, 14 and other transition-metal carbides and sulfides, 15−18 have prospered in the area of catalysis.…”

Section: Introductionmentioning

confidence: 99%

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S-Vacancy Defect and Transition-Metal Atom Doping to Trigger Hydrogen Evolution of Two-Dimensional MoS₂

Liu

Guan

et al. 2023

Energy Fuels

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Two-dimensional (2D) MoS2 is commonly used as an anode catalyst for electrochemical water splitting. However, the limited active edge sites of 2D MoS2 have hindered its electrochemical performance in electrochemical water splitting. Here, experimental outcomes and density functional theory (DFT) calculations demonstrate that the catalytic performance of inert 2D MoS2 surfaces can be triggered by doping transition-metal atoms and introducing S-vacancies. In this work, the catalytic activity of different metal-doped (Cu, Mn, and Nb) 2D MoS2 with S-vacancies shows a great difference among tested MoS2-based samples. Characterizations verify the existence of dopant ions and S-vacancies. In particular, the Cu-doped electrocatalyst exhibits a low overpotential of 197 mV at 10 mA cm–2 in an acidic solution and superior stability of less than 10 mV increase in overpotential after 12 h of continuous hydrogen production process, proving that Cu doping and introduced S-vacancies can benefit the electrochemical performance. Moreover, DFT calculations reveal that S-vacancies and the further introduction of different metal ions can alter the adsorption behavior of H atoms by changing the d-band center of the in-plane Mo site neighboring the doped heteroatom atoms and S-vacancy sites, which explains well the superior performance of Cu-doped 2D MoS2.

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Section: Electrochemical Performancesupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

S-Vacancy Defect and Transition-Metal Atom Doping to Trigger Hydrogen Evolution of Two-Dimensional MoS₂

Liu

Guan

et al. 2023

Energy Fuels

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“…Figure b shows the Mo 3d spectra of Mo-Ni 3 S 2 NRs, where 228.67, 231.89, 232.73, and 235.6 eV correspond to 3d 5/2 and 3d 3/2 of Mo 4+ and Mo 6+ . The peaks at 225.99 and 229.9 eV correspond to S 2s and Mo 5+ . As shown in Figure S7, the O 1s spectrum can be divided into four distinct peaks; the peak at 529.71 eV corresponded to metal–oxygen bonds; the peak at 530.81 eV attributed to oxygen in SO 4 2– groups; the peak at 532.13 eV assigned to oxygen component with a higher number of defect sites but low oxygen coordination; and the peak at 533.11 eV referred to multiplicity of physical and chemical absorbed oxygen at the surface …”

Section: Resultsmentioning

confidence: 99%

“…The peaks at 225.99 and 229.9 eV correspond to S 2s and Mo 5+ . 38 As shown in Figure S7, the O 1s spectrum can be divided into four distinct peaks; the peak at 529.71 eV corresponded to metal− oxygen bonds; 12 the peak at 530.81 eV attributed to oxygen in SO 4 2− groups; 26 the peak at 532.13 eV assigned to oxygen component with a higher number of defect sites but low oxygen coordination; 12 and the peak at 533.11 eV referred to multiplicity of physical and chemical absorbed oxygen at the surface. 15 Figure 5c shows the Ni 2p spectrum at 855.76 and 873.34 eV, which belong to 2p 3/2 and 2p 1/2 of Ni 2+ .…”

Section: Resultsmentioning

confidence: 99%

One-Step Hydrothermal Synthesis of Mo-Doped Ni₃S₂ Nanorods for Efficient Hydrogen Evolution Reaction

Yan

et al. 2022

ACS Appl. Energy Mater.

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In recent years, the development of catalysts for the transition-metal sulfide hydrogen evolution reaction (HER) has received extensive attention. However, the design of low-cost transition-metal sulfide-based catalysts remains a great challenge due to slow water dissociation kinetics and poor long-term stability of the catalysts during the alkaline HER. In this paper, we report the Mo-doped Ni3S2 nanorods (Mo-Ni3S2 NRs) materials prepared by a facile one-step solvothermal method. The doping of Mo accelerates the dissociation of water, increases the electron transport capacity of Ni3S2, and improves the hydrogen adsorption capacity of Ni3S2. The introduction of NH4OH induces the growth of oriented nanorods of Ni3S2 and exposes the high-index crystallographic surface of Ni3S2. The optimized Mo-Ni3S2 NRs catalyst presents low overpotentials of 37.7 mV to reach a current density of 10 mA cm–2 in 1.0 M KOH, and outstanding durability of 24 h could be achieved for the HER.

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“…Therefore, alternative water electrolysis materials must be produced with an economical and effective catalyst relative to the aforementioned HER catalyst. For that reason, the best ways to mitigate manufacturing costs and reduce the over-potential of HER have also been evaluated with various electrocatalytic materials [13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of N-rGO-MWCNT/CuCrO2 Catalyst for the Bifunctional Application of Hydrogen Evolution Reaction and Electrochemical Detection of Bisphenol-A

et al. 2021

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A glassy carbon electrode (GCE) coated with delafossite CuCrO2 loading on the nitrogen-doped reduced graphene oxide (N-rGO) and multiwalled carbon nanotubes (MWCNT) composite (N-rGO-MWCNT/CuCrO2) was applied to the hydrogen evolution reaction and Bisphenol-A (BPA) detection. First, the N-rGO-MWCNT composite was prepared by in situ chemical reduction with caffeic acid as a reducing agent. Then, CuCrO2 was accumulated on the N-rGO-MWCNT surface to form N-rGO-MWCNT/CuCrO2 composite. The morphology structure of the N-rGO-MWCNT/ CuCrO2 composite was analyzed by different characterization techniques. Besides, the GCE/N-rGO-MWCNT/CuCrO2 composite electrode was investigated for hydrogen evolution reaction (HER), which shows an excellent electrocatalytic activity with a low over-potential, increasing reduction current, and a small Tafel slope of 62 mV·dec−1 at 10 mA·cm−2 with long-term stability. Moreover, the electrochemical determination of BPA was in the range of 0.1-110 µM, and low detection limit of 0.033 µM (S/N = 3) with a higher sensitivity of 1.3726 µA µM−1 cm−2. Furthermore, the prepared GCE/N-rGO-MWCNT/CuCrO2 electrode shows effective detection of BPA in food samples with acceptable recoveries. Hence, the finding of GCE/N-rGO-MWCNT/CuCrO2 can be observed as an impressive catalyst to the electrocatalytic activity of HER and BPA oxidation.

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Cu–MoS2/rGO hybrid material for enhanced hydrogen evolution reaction performance

Cited by 39 publications

References 47 publications

S-Vacancy Defect and Transition-Metal Atom Doping to Trigger Hydrogen Evolution of Two-Dimensional MoS₂

S-Vacancy Defect and Transition-Metal Atom Doping to Trigger Hydrogen Evolution of Two-Dimensional MoS₂

One-Step Hydrothermal Synthesis of Mo-Doped Ni₃S₂ Nanorods for Efficient Hydrogen Evolution Reaction

Synthesis of N-rGO-MWCNT/CuCrO2 Catalyst for the Bifunctional Application of Hydrogen Evolution Reaction and Electrochemical Detection of Bisphenol-A

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Cu–MoS2/rGO hybrid material for enhanced hydrogen evolution reaction performance

Cited by 39 publications

References 47 publications

S-Vacancy Defect and Transition-Metal Atom Doping to Trigger Hydrogen Evolution of Two-Dimensional MoS2

S-Vacancy Defect and Transition-Metal Atom Doping to Trigger Hydrogen Evolution of Two-Dimensional MoS2

One-Step Hydrothermal Synthesis of Mo-Doped Ni3S2 Nanorods for Efficient Hydrogen Evolution Reaction

Synthesis of N-rGO-MWCNT/CuCrO2 Catalyst for the Bifunctional Application of Hydrogen Evolution Reaction and Electrochemical Detection of Bisphenol-A

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S-Vacancy Defect and Transition-Metal Atom Doping to Trigger Hydrogen Evolution of Two-Dimensional MoS₂

S-Vacancy Defect and Transition-Metal Atom Doping to Trigger Hydrogen Evolution of Two-Dimensional MoS₂

One-Step Hydrothermal Synthesis of Mo-Doped Ni₃S₂ Nanorods for Efficient Hydrogen Evolution Reaction