Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 31, Issue 33, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202101532
Keywords
doping engineering; electrocatalyst; heterogeneous interfaces; Mo-NiP; (x); NiS; (y) heterojunction; water splitting
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Funding
- National Natural Science Foundation of China [22075152, 22073052]
- Natural Science Foundation of Jiangsu Province [BK20190918]
- Natural Science Research Projects of Universities in Jiangsu Province [19KJB430030]
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The Mo-NiPx/NiSy electrode exhibits low overpotentials and high activity in both hydrogen evolution and oxygen evolution reactions, demonstrating remarkable full water splitting performance comparable to commercial electrolysis.
Highly efficient electrocatalysts composed of earth-abundant elements are desired for water-splitting to produce clean and renewable chemical fuel. Herein, a heteroatomic-doped multi-phase Mo-doped nickel phosphide/nickel sulfide (Mo-NiPx/NiSy) nanowire electrocatalyst is designed by a successive phosphorization and sulfuration method for boosting overall water splitting (both oxygen and hydrogen evolution reactions (HER)) in alkaline solution. As expected, the Mo-NiPx/NiSy electrode possesses low overpotentials both at low and high current densities in HER, while the Mo-NiPx/NiSy heterostructure exhibits high active performance with ultra-low overpotentials of 137, 182, and 250 mV at the current density of 10, 100, and 400 mA cm(-2) in 1 m KOH solution, respectively, in oxygen evolution reaction. In particular, the as-prepared Mo-NiPx/NiSy electrodes exhibit remarkable full water splitting performance at both low and high current densities of 10, 100, and 400 mA cm(-2) with 1.42, 1.70, and 2.36 V, respectively, which is comparable to commercial electrolysis.
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