Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 9, Issue 47, Pages 26852-26860Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ta08699e
Keywords
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Funding
- National Natural Science Foundation of China [22179104, 22075223]
- Wuhan University of Technology [2021IVA010B]
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (Wuhan University of Technology) [2021-ZD-4]
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This study successfully synthesized a low-cost, high-performance bifunctional catalyst that effectively drives hydrogen and oxygen production reactions in electrochemical water electrolysis through a specific heterostructure, achieving excellent catalytic performance.
Low-cost high-performance catalysts are urgently required for hydrogen production from electrochemical water electrolysis by the hydrogen evolution reaction (HER) and slow oxygen evolution reaction (OER). Herein, by means of phosphating CoV-LDH impregnated with Ru (Ru-CoV-LDH/NF), a vanadium (V)-doped flower-like CoP/Ni2P heterostructure coupled with ultralow Ru (RuV-CoNiP/NF) is constructed. The electronic modulation caused by V doping effectively stimulates the activity of the CoP/Ni2P heterostructure assisted by ultrasmall Ru nanoparticles, thus the formed RuV-CoNiP/NF effectively drives the HER (eta(10) = 28 mV) and OER (eta(20) = 214 mV) in alkaline media. Impressively, during the overall water decomposition, it requires only an overpotential of 1.469 V to achieve 10 mA cm(-2), demonstrating almost the most remarkable catalytic performance compared to the past literature. Notably, the catalyst can still positively promote the electrolysis of alkaline seawater: when achieving 20 mA cm(-2), the required overpotential is only 1.538 V, which is almost the best experimental result at present. This work provides an idea for achieving low-cost high-performance bifunctional catalysts toward hydrogen production from water and seawater splitting.
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