Sequential Ni-Pt Decoration on Co(OH)2 via Microwave Reduction for Highly Efficient Alkaline Hydrogen Evolution

A rapid solvent-free microwave-assisted strategy was developed to fabricate Pt- and Ni-modified Co(OH)<sub>2</sub> catalysts for alkaline hydrogen evolution. Among them, Ni-Pt@Co(OH)<sub>2</sub>, prepared via sequential Ni-first then Pt loading, exhibited the best performance. Structural analyses confirmed uniform Pt dispersion with dominant Pt(111) facets, while ICP-MS showed reduced Pt usage compared to Pt@Co(OH)<sub>2</sub>. Electrochemical measurements in 1.0 M KOH revealed an overpotential of 71 mV at 10 mA·cm<sup>-2</sup>, comparable to Pt/C, and a mass activity 4-6.5 times higher across 25-75 mV. EIS demonstrated lower charge-transfer resistance, and stability tests showed negligible degradation after 3000 CV cycles and 11 h continuous operation. The outstanding performance arises from enhanced Pt utilization, abundant conductive sites, and strong Ni-Pt interfacial synergy, highlighting Ni-Pt@Co(OH)<sub>2</sub> as a promising catalyst for efficient alkaline HER with reduced Pt consumption.

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Publication Details

Journal
Nanomaterials
Published
2025-12-14
DOI
https://doi.org/10.3390/nano15241876
Primary Topic
Electrocatalysts for Energy Conversion
Type
article
Field-Weighted Citation Impact
0.00

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article

Sequential Ni-Pt Decoration on Co(OH)2 via Microwave Reduction for Highly Efficient Alkaline Hydrogen Evolution

Baorui Jia, Mingli Qin, Guosheng Cao, Xuanhui Qu et al.
Nanomaterials
Electrocatalysts for Energy Conversion
article

Sequential Ni-Pt Decoration on Co(OH)2 via Microwave Reduction for Highly Efficient Alkaline Hydrogen Evolution

Baorui Jia, Mingli Qin, Guosheng Cao, Xuanhui Qu, Xiaoyu Wu, Zikang Chen, Hongru Liu
article en

Abstract

A rapid solvent-free microwave-assisted strategy was developed to fabricate Pt- and Ni-modified Co(OH)<sub>2</sub> catalysts for alkaline hydrogen evolution. Among them, Ni-Pt@Co(OH)<sub>2</sub>, prepared via sequential Ni-first then Pt loading, exhibited the best performance. Structural analyses confirmed uniform Pt dispersion with dominant Pt(111) facets, while ICP-MS showed reduced Pt usage compared to Pt@Co(OH)<sub>2</sub>. Electrochemical measurements in 1.0 M KOH revealed an overpotential of 71 mV at 10 mA·cm<sup>-2</sup>, comparable to Pt/C, and a mass activity 4-6.5 times higher across 25-75 mV. EIS demonstrated lower charge-transfer resistance, and stability tests showed negligible degradation after 3000 CV cycles and 11 h continuous operation. The outstanding performance arises from enhanced Pt utilization, abundant conductive sites, and strong Ni-Pt interfacial synergy, highlighting Ni-Pt@Co(OH)<sub>2</sub> as a promising catalyst for efficient alkaline HER with reduced Pt consumption.

NanomaterialsVol. 15(24)
National University of Singapore (SG), Shenzhen Polytechnic University (CN), Liaoning Academy of Materials, University of Science and Technology Beijing (CN)
National Natural Science Foundation of China, China Postdoctoral Science Foundation, National Key Research and Development Program of China, Fundamental Research Funds for the Central Universities, Basic and Applied Basic Research Foundation of Guangdong Province
Openalex Percentile: Top 70%
Electrocatalysts for Energy Conversion
DOIOpen Access PDFOpenAlex
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