Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 7, Issue 2, Pages 2437-2445Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b05315
Keywords
Interface engineering; Crystalline/amorphous Co2P/CoMoPx; One-step electrodeposition; Electrocatalysis; Hydrogen evolution reaction
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Funding
- National Natural Science Foundation of China [51103120]
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Exploring highly active and stable non-noble metal -based electrocatalysts is of great significance for the wide application of hydrogen evolution reaction (HER) in alkaline media. Herein, we report that crystalline/amorphous Co2P/CoMoPx nanoparticles containing many active interfaces supported on nickel foam (NF) are highly efficient electrocatalysts for alkaline HER. The interface-engineered crystalline/amorphous Co2P/CoMoPx nanostructure is achieved by simple one-step electrodeposition method under a controllable constant current. The optimal electrocatalyst Co2P/CoMoPx-0.4/NF in this work exhibits superior activity for the alkaline HER with low overpotentials of -121 mV at 100 mA.cm(-2) and prominent electrochemical stability for 50 h. Excellent HER performance can be attributed to a large amount of active interfaces formed between crystalline Co2P and amorphous CoMoPx which provide effective exposure of highly active sites and promote electron transfer. This work may open up a new way for the design and preparation of earth abundant, low-cost nanostructured materials as high-efficiency HER electrocatalysts for applications in the field of electrocatalysis.
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