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

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 suc...

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Published inMaterials Vol. 16; no. 8; p. 3171
Main Authors Wang, Hongbin, Ye, Beirong, Li, Chen, Tang, Tao, Li, Sipu, Shi, Shaojun, Wu, Chunyang, Zhang, Yongqi
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 18.04.2023
MDPI
Subjects
Alloys
Ammonia
Carbon
Catalysts
Catalytic activity
Electrocatalysis
Electrocatalysts
electrodeposition
Electrodes
Electrolysis
Electrolytes
Electron conductivity
Graphene
Graphite
high surface area
Hydrogen
hydrogen evolution reaction
Hydrogen evolution reactions
Morphology
Nanoalloys
Nanoparticles
NiMo alloy
Structural stability
Synergistic effect
Transition metals
Ultrafines
vertical graphene
China
Taiwan
vertical graphene
NiMo alloy
electrodeposition
high surface area
hydrogen evolution reaction
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Summary: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 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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ISSN:1996-1944
1996-1944
DOI:10.3390/ma16083171