Novel heterostructure Cu2S/Ni3S2 coral-like nanoarrays on Ni foam to enhance hydrogen evolution reaction in alkaline media

Peng, Yizhi; He, Hanwei

doi:10.1039/d1ra07514d

Cited by 9 publications

(5 citation statements)

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“…Sulfuration does not damage the structure of the material and makes the surface of the smooth nanorod array rough. The rough surface structure is mainly due to the outward diffusion of S 2− and Cu + within the CF, which exposes more active sites 49 …”

Section: Resultsmentioning

confidence: 99%

“…The rough surface structure is mainly due to the outward diffusion of S 2− and Cu + within the CF, which exposes more active sites. 49 The composition of the Cu(OH) 2 /Cu 2 S catalyst was analyzed by EDS. Figure 2A shows the SEM image of the Cu(OH) 2 /Cu 2 S sample, and Figure 2B−E shows the elemental scanning image of the Cu(OH) 2 /Cu 2 S sample.…”

Section: Characterization Techniquesmentioning

confidence: 99%

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Preparation of Cu(OH)₂/Cu₂S arrays for enhanced hydrogen evolution reaction

Xu,

Qiao,

Liu

et al. 2024

Battery Energy

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Cu(OH)2 has the advantages of ease of structural regulation, good conductivity, and relatively low cost, making it a suitable candidate material for use as an electrocatalyst. However, its catalytic efficiency and stability still need to be improved further. Therefore, Cu(OH)2/Cu2S was successfully prepared on copper foam (CF) using the in situ growth and hydrothermal method. The structural characterization showed that sulfidation treatment induced transformation of Cu(OH)2/CF from smooth nanorods into a coral‐like structure, which exposed more active sites of Cu(OH)2/Cu2S and enhanced the performance of electrocatalytic hydrogen evolution reaction (HER). Compared with Cu(OH)2, Cu(OH)2/Cu2S showed better alkaline HER performance, especially when the vulcanization concentration was 0.1 M, the overpotential of Cu(OH)2/Cu2S was 174 mV, and the reaction kinetics was 64 mv dec−1 at a current density of 10 mA cm−2. In this work, the morphology and electronic structure of copper‐based metal sulfide electrocatalysts were adjusted by sulfide treatment, which provided a new reference for improving HER performance.

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Section: Resultsmentioning

confidence: 99%

Section: Characterization Techniquesmentioning

confidence: 99%

Preparation of Cu(OH)₂/Cu₂S arrays for enhanced hydrogen evolution reaction

Xu,

Qiao,

Liu

et al. 2024

Battery Energy

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“…11 It was reported that alloying of Ir with transition metals like Pd, Ni, and Mo can enhance the catalytic activity by achieving an optimal balance between the hydrogen binding energy (HBE) and the hydroxide binding energy (OHBE). [19][20][21][22] Herein, a precursor route was designed for the synthesis of Ir-Ni/NiO/C products, whereby Ir nanoclusters were immobilized onto the generated Ni/NiO/C support derived from the metal-organic framework precursor. In the trinary support, the involved Ni would modulate the hydrogen binding energy, while the NiO can provide sites for the adsorption of OH species.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A trinary support of Ni/NiO/C to immobilize Ir nanoclusters for alkaline hydrogen oxidation

Kang,

Peng,

Wei

et al. 2024

Dalton Trans.

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“…Figure S4 SEM images after reaction. References [ 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 ] are cited in the Supplementary Materials.…”

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confidence: 99%

Synthesis of NiMoO4/NiMo@NiS Nanorods for Efficient Hydrogen Evolution Reactions in Electrocatalysts

Xiang

Zou

et al. 2023

Nanomaterials

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As traditional energy structures transition to new sources, hydrogen is receiving significant research attention owing to its potential as a clean energy source. The most significant problem with electrochemical hydrogen evolution is the need for highly efficient catalysts to drive the overpotential required to generate hydrogen gas by electrolyzing water. Experiments have shown that the addition of appropriate materials can reduce the energy required for hydrogen production by electrolysis of water and enable it to play a greater catalytic role in these evolution reactions. Therefore, more complex material compositions are required to obtain these high-performance materials. This study investigates the preparation of hydrogen production catalysts for cathodes. First, rod-like NiMoO4/NiMo is grown on NF (Nickel Foam) using a hydrothermal method. This is used as a core framework, and it provides a higher specific surface area and electron transfer channels. Next, spherical NiS is generated on the NF/NiMo4/NiMo, thus ultimately achieving efficient electrochemical hydrogen evolution. The NF/NiMo4/NiMo@NiS material exhibits a remarkably low overpotential of only 36 mV for the hydrogen evolution reaction (HER) at a current density of 10 mA·cm−2 in a potassium hydroxide solution, indicating its potential use in energy-related applications for HER processes.

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Novel heterostructure Cu₂S/Ni₃S₂ coral-like nanoarrays on Ni foam to enhance hydrogen evolution reaction in alkaline media

Abstract: We fabricated a heterostructure Cu2S/Ni3S2 nanosheet array, which can accelerate charge transfer and provide more active sites. This work provides a promising non-noble metal electrocatalyst for water splitting under alkaline conditions.

Cited by 9 publications

References 58 publications

Preparation of Cu(OH)₂/Cu₂S arrays for enhanced hydrogen evolution reaction

Preparation of Cu(OH)₂/Cu₂S arrays for enhanced hydrogen evolution reaction

A trinary support of Ni/NiO/C to immobilize Ir nanoclusters for alkaline hydrogen oxidation

Synthesis of NiMoO4/NiMo@NiS Nanorods for Efficient Hydrogen Evolution Reactions in Electrocatalysts

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Novel heterostructure Cu2S/Ni3S2 coral-like nanoarrays on Ni foam to enhance hydrogen evolution reaction in alkaline media

Abstract: We fabricated a heterostructure Cu2S/Ni3S2 nanosheet array, which can accelerate charge transfer and provide more active sites. This work provides a promising non-noble metal electrocatalyst for water splitting under alkaline conditions.

Cited by 9 publications

References 58 publications

Preparation of Cu(OH)2/Cu2S arrays for enhanced hydrogen evolution reaction

Preparation of Cu(OH)2/Cu2S arrays for enhanced hydrogen evolution reaction

A trinary support of Ni/NiO/C to immobilize Ir nanoclusters for alkaline hydrogen oxidation

Synthesis of NiMoO4/NiMo@NiS Nanorods for Efficient Hydrogen Evolution Reactions in Electrocatalysts

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Novel heterostructure Cu₂S/Ni₃S₂ coral-like nanoarrays on Ni foam to enhance hydrogen evolution reaction in alkaline media

Preparation of Cu(OH)₂/Cu₂S arrays for enhanced hydrogen evolution reaction

Preparation of Cu(OH)₂/Cu₂S arrays for enhanced hydrogen evolution reaction