Enhancing hydrogen evolution reaction by synergistically coupling NiMo alloy with Mo on Ni foam

Ma, Guanshui; Zheng, Yapeng; Zhang, Jiayue; Yan, Jiangshan; Guo, Peng; Yang, Wei; Chen, Rende; Yuan, Jianghuai; Cui, Li; Wang, Aiying

doi:10.1016/j.jallcom.2022.167855

“…The following supporting information can be downloaded at: https:// www.mdpi.com/article/10.3390/ma16083171/s1, Figure S1: The wide-scan XPS spectra of NiMo@VG @CC-AC; Figure S2: SEM image of VG@CC; Figure S3: SEM images of NiMo@VG@CC-AC at the different deposition cycles; Figure S4: EDS pattern of NiMo@VG@CC-AC; Figure S5: HER performance of NiMo@VG@CC-AC at the different deposition cycles in 1 M KOH electrolyte; Figure S6: Cyclic voltammogram curves in double layer region at scan rates of 4, 8, 12, 16, 20 mV•s −1 of NiMo@VG@CC-AC at the different number of deposition cycles in 1 M KOH electrolyte; Figure S7: Nyquist plots at the overpotential of 10 mV of NiMo@VG@CC-AC at the different number of deposition cycles in 1 M KOH electrolyte; S1: Impedance circuit diagram fitting parameters of NiMo@VG@CC-AC with different deposition cycles; Table S2: Impedance circuit diagram fitting parameters of different composite catalysts; Table S3: Performance comparison of NiMo-based catalysts on various substrates; Table S4: Impedance circuit diagram fitting parameters of NiMo alloy catalysts on various substrates. References [44][45][46][47][48][49][50][51][52][53][54][55] are cited in the supplementary materials.…”

Section: Supplementary Materialsmentioning

confidence: 99%

Vertical Graphene-Supported NiMo Nanoparticles as Efficient Electrocatalysts for Hydrogen Evolution Reaction under Alkaline Conditions

Wang

¹

,

Ye

²

,

Li

³

et al. 2023

Materials

5

0

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Water electrolysis as an important and facile strategy to generate hydrogen has attracted great attention, and efficient electrocatalysts play a key role in hydrogen evolution reaction (HER). Herein, vertical graphene (VG)-supported ultrafine NiMo alloy nanoparticles (NiMo@VG@CC) were fabricated successfully via electro-depositing as efficient self-supported electrocatalysts for HER. The introduction of metal Mo optimized the catalytic activity of transition metal Ni. In addition, VG arrays as the three-dimensional (3D) conductive scaffold not only ensured high electron conductivity and robust structural stability, but also endowed the self-supported electrode large specific surface area and exposed more active sites. With the synergistic effect between NiMo alloys and VG, the optimized NiMo@VG@CC electrode exhibited a low overpotential of 70.95 mV at 10 mA cm−2 and a remarkable stable performance over 24 h. This research is anticipated to offer a powerful strategy for the fabrication of high-performance hydrogen evolution catalysts.

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Unlocking Catalytic Potential: Exploring the Impact of Thermal Treatment on Enhanced Electrocatalysis of Nanomaterials

Kogularasu,

Lee,

Sriram

et al. 2023

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In the evolving field of electrocatalysis, thermal treatment of nano‐electrocatalysts has become an essential strategy for performance enhancement. This review systematically investigates the impact of various thermal treatments on the catalytic potential of nano‐electrocatalysts. The focus encompasses an in‐depth analysis of the changes induced in structural, morphological, and compositional properties, as well as alterations in electro‐active surface area, surface chemistry, and crystal defects. By providing a comprehensive comparison of commonly used thermal techniques, such as annealing, calcination, sintering, pyrolysis, hydrothermal, and solvothermal methods, this review serves as a scientific guide for selecting the right thermal technique and favorable temperature to tailor the nano‐electrocatalysts for optimal electrocatalysis. The resultant modifications in catalytic activity are explored across key electrochemical reactions such as electrochemical (bio)sensing, catalytic degradation, oxygen reduction reaction, hydrogen evolution reaction, overall water splitting, fuel cells, and carbon dioxide reduction reaction. Through a detailed examination of the underlying mechanisms and synergistic effects, this review contributes to a fundamental understanding of the role of thermal treatments in enhancing electrocatalytic properties. The insights provided offer a roadmap for future research aimed at optimizing the electrocatalytic performance of nanomaterials, fostering the development of next‐generation sensors and energy conversion technologies.

show abstract

Unlocking Catalytic Potential: Exploring the Impact of Thermal Treatment on Enhanced Electrocatalysis of Nanomaterials

Kogularasu,

Lee,

Sriram

et al. 2023

View full text Add to dashboard Cite

In the evolving field of electrocatalysis, thermal treatment of nano‐electrocatalysts has become an essential strategy for performance enhancement. This review systematically investigates the impact of various thermal treatments on the catalytic potential of nano‐electrocatalysts. The focus encompasses an in‐depth analysis of the changes induced in structural, morphological, and compositional properties, as well as alterations in electro‐active surface area, surface chemistry, and crystal defects. By providing a comprehensive comparison of commonly used thermal techniques, such as annealing, calcination, sintering, pyrolysis, hydrothermal, and solvothermal methods, this review serves as a scientific guide for selecting the right thermal technique and favorable temperature to tailor the nano‐electrocatalysts for optimal electrocatalysis. The resultant modifications in catalytic activity are explored across key electrochemical reactions such as electrochemical (bio)sensing, catalytic degradation, oxygen reduction reaction, hydrogen evolution reaction, overall water splitting, fuel cells, and carbon dioxide reduction reaction. Through a detailed examination of the underlying mechanisms and synergistic effects, this review contributes to a fundamental understanding of the role of thermal treatments in enhancing electrocatalytic properties. The insights provided offer a roadmap for future research aimed at optimizing the electrocatalytic performance of nanomaterials, fostering the development of next‐generation sensors and energy conversion technologies.

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Enhancing hydrogen evolution reaction by synergistically coupling NiMo alloy with Mo on Ni foam

Cited by 17 publications

References 59 publications

Vertical Graphene-Supported NiMo Nanoparticles as Efficient Electrocatalysts for Hydrogen Evolution Reaction under Alkaline Conditions

Vertical Graphene-Supported NiMo Nanoparticles as Efficient Electrocatalysts for Hydrogen Evolution Reaction under Alkaline Conditions

Unlocking Catalytic Potential: Exploring the Impact of Thermal Treatment on Enhanced Electrocatalysis of Nanomaterials

Unlocking Catalytic Potential: Exploring the Impact of Thermal Treatment on Enhanced Electrocatalysis of Nanomaterials

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