Journal
ACS APPLIED ENERGY MATERIALS
Volume 3, Issue 9, Pages 9449-9458Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.0c01911
Keywords
layered double hydroxide; transition-metal phosphides; hydrangea; electron interaction; overall water splitting
Funding
- China Postdoctoral Science Foundation [2016M601355]
- Natural Science Foundation of China [21603017]
- Natural Science Foundation of Jilin Province, China [20170101095JC]
- Foundation of Jilin Educational Committee [JJKH20181091KJ]
- International Cooperation Project of Jilin Province [20190701022GH]
- Innovative Foundation of Changchun University of Science and Technology [XJJLG-2016-01]
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The morphology and electronic structure dual modulation is an effective strategy to optimize the performance of the electrocatalysts. Herein, a hydrangea-like vanadium-doped FeNi2P hybrid material loaded on nickel foam (V-FeNi2P/NF) is constructed by a facile hydrothermal reaction followed by phosphorization for the first time. The introduction of foreign V effectively modulates the electronic structure of Ni and leads to hydrangea-like morphology. The optimized V-FeNi2P/NF with open-ended sites shows large electrochemically active surface area. Not surprisingly, the V-FeNi2P/NF displays remarkable electrocatalytic performances for both hydrogen evolution (HER) and oxygen evolution (OER) reactions in 1.0 M KOH solution, with reduced overpotentials of 70 and 200 mV to achieve a current density of 10 mA cm(-2) for HER and OER, respectively. The assembled water electrolyzer using V-FeNi2P/NF as the anode and cathode electrodes only needs a low cell voltage of 1.57 V to deliver 10 mA cm(-2) and shows excellent long-term stability and recoverability.
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