Journal
NANOSCALE
Volume 12, Issue 21, Pages 11526-11535Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nr02196b
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Funding
- Natural Science Foundation of Shaanxi Province [2020JZ-23]
- Fundamental Research Funds for the Central Universities [GK201901002, GK201803038, 2017TS049]
- 111 Project [B14041]
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Water electrolysis is an environmentally friendly and sustainable technique for ultra-pure hydrogen production, while expensive electrode materials and high driving voltage have seriously hindered its commercialization process. Here, Earth-abundant bifunctional porous Ni2P hollow nanotubes on nickel foam (Ni2P-HNTs/NF) electrocatalysts are synthesized through a facile self-template method and a phosphating process, which are perfectly combined with the hydrazine electrooxidation reaction (HzOR) boosted water electrolysis. Benefiting from the unique structural characteristic of open-framework and abundant step atoms, Ni2P-HNTs/NF achieves 10 mA cm(-2) at 91 mV (vs. RHE) for the cathodic hydrogen evolution reaction and 18 mV (vs. RHE) for the anodic HzOR in a three electrode system, respectively. The corresponding two-electrode hydrazine electrolyzer produces 10 mA cm(-2) with a total voltage of only 152 mV for ultra-pure hydrogen production, highlighting a cost-effective and energy-saving water electrolysis mode.
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