期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 6, 期 5, 页码 6146-+出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b04808
关键词
Water splitting; Trimetallic phosphide; Uniform nanoplates; Low overpotential; Synergistic effects; Long-term stability
资金
- Nano-Material Technology Development Program through the National Research Foundation of Korea (NRF) [NRF-2017M3A7B4041987]
- National Research Foundation of Korea [2017M3A7B4041988] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Exploration of proficient electrocatalyst from earth-abundant nonprecious metals in lieu of noble metal-based catalysts to obtain clean hydrogen energy through large-scale electrochemical water splitting is still an ongoing challenge. Herein, iron-doped nickel cobalt phosphide nanoplate arrays grown on a carbon cloth (NiCoFexP/CC) are fabricated using a simple hydrothermal route, followed by phosphorization. The electrochemical analysis demonstrates that the NiCoFexP/CC electrode possesses high electrocatalytic activity for water splitting in alkaline medium. Benefits from the synergistic effect between the metal centers, two-dimensional porous nanoplates, and unique three-dimensional electrode configuration of NiCoFexP/CC provide small over potentials of 39 at 10 mA cm(-2) and 275 mV at 50 mA cm(-2) to drive the hydrogen evolution reaction and oxygen evolution reaction, respectively. Furthermore, the assembled two-electrode (NiCoFexP/ CC iiNiCoFe(x)P/CC) alkaline water electrolyzer can achieve 10 mA cm(-2) current density at 1.51 V. Remarkably, it can maintain stable electrolysis over 150 h. The excellent activity and stability of this catalyst is proved to be a economical substitute of commercial noble metal-based catalysts in technologies relevant to renewable energy.
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