期刊
IONICS
卷 28, 期 8, 页码 3927-3934出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-022-04634-z
关键词
Hydrogen production; Urea electrolysis; Iron phosphosulfide nanosheets; Bifunctional catalyst; Energy-efficient
资金
- National Natural Science Foundation of China [22075211, 21601136, 51971157, 62005173, 51621003]
Urea-assisted hydrogen evolution is a promising approach for reducing energy consumption in hydrogen production. In this study, nitrogen-doped iron phosphorus trisulfide nanosheets were prepared and exhibited excellent performance as bifunctional electrocatalysts for both the hydrogen evolution reaction and urea oxidation reaction. The development of FePS3-based materials provides a new strategy for energy-saving hydrogen production.
Urea-assisted hydrogen evolution is a promising alternative to conventional water splitting for producing hydrogen with reduced energy consumption. Therefore, the development of bifunctional electrocatalysts to be used in urine-mediated electrolyzers for the hydrogen evolution reaction (HER) and urea oxidation reaction (UOR) is required. In this work, nitrogen-doped iron phosphorus trisulfide (FePS3) nanosheets were prepared, which performance surpassed platinum on carbon electrocatalysts at large current densities above 140 mA cm(-2), exhibiting excellent HER performance. A low overpotential of 756 mV was observed for UOR to drive a current density of 10 mA cm(-2). When configured for hydrogen production, the urea electrolysis cell delivered a current density of 10 mA cm(-2) at a cell voltage of 1.26 V, which is about 0.28 V lower than in conventional water electrolysis. The development of FePS3-based materials as bifunctional electrocatalysts provides a new approach enabling energy-saving hydrogen production.
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