Self-Derivation and Surface Reconstruction of Fe-Doped Ni3S2 Electrode Realizing High-Efficient and Stable Overall Water and Urea Electrolysis

被引:202
作者
Li, Derun [1 ,2 ]
Wan, Wenjing [1 ,2 ]
Wang, Zhaowu [3 ,4 ]
Wu, Hengyi [1 ,2 ]
Wu, Shixin [1 ,2 ]
Jiang, Tao [1 ,2 ]
Cai, Guangxu [1 ,2 ]
Jiang, Changzhong [1 ,2 ]
Ren, Feng [1 ,2 ]
机构
[1] Wuhan Univ, Sch Phys & Technol, Ctr Ion Beam Applicat, Ctr Electron Microscopy,Hubei Key Lab Nucl Solid, Wuhan 430072, Peoples R China
[2] Wuhan Univ, MOE Key Lab Artificial Micro & Nanostruct, Wuhan 430072, Peoples R China
[3] Hebei Univ Technol, Sch Sci, Tianjin 300401, Peoples R China
[4] Henan Univ Sci & Technol, Sch Phys & Engn, Luoyang 471023, Peoples R China
基金
中国国家自然科学基金;
关键词
Fe-doped Ni; S-3; (2); self-derivation; stability; surface reconstruction; urea splitting; water splitting; HYDROGEN-EVOLUTION; OXYGEN REDUCTION; THIN-FILMS; ELECTROCATALYSTS; OXIDATION; CATALYSTS; NI; NANOPARTICLES; PERFORMANCE; SULFIDE;
D O I
10.1002/aenm.202201913
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Exploring earth-abundant, highly effective, and stable electrocatalysts for overall water and urea electrolysis is urgent and essential for developing hydrogen energy technology. Herein, a simple self-derivation method is used to fabricate a Fe-doped Ni3S2 electrode. The electrode exhibits an impressive trifunctional catalyst, with low overpotentials of 290, 198, and 254 mV at 100 mA cm(-2) for the oxygen evolution reaction (OER), urea oxidation reaction (UOR), and hydrogen evolution reaction (HER). The durability is higher than 3500 h (146 days) at 100 mA cm(-2) for the OER without obvious change. In situ Raman spectra reveal the incorporation of Fe inhibited S dissolution and facilitates the catalyst reconstruction. The density functional theory calculations indicate that the doping of Fe optimizes the adsorption of the rate-determining step and the d-band center is closer to the Fermi level, which accelerates the OER process. The two-electrode electrolyzer needs the cell voltages of only 1.76 and 1.57 V to achieve a current density of 100 mA cm(-2) and remarkable durability for more than 500 h at 100 and 500 mA cm(-2) for overall water and urea splitting. This work holds great promise for industrial water and urea splitting applications.
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页数:11
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