期刊
DALTON TRANSACTIONS
卷 49, 期 42, 页码 15009-15022出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0dt03014g
关键词
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资金
- National Natural Science Foundation of China [21571005]
- High School Leading talent incubation programme of Anhui province [gxbjZD2016010]
- Recruitment Program for Leading Talent Team of Anhui Province
Fe-Doped Co-Mo-S microtubes were successfully synthesized through a multistep synthetic route, employing MoO3 microrods as the sacrificial template, Co(NO3)(2)center dot 6H(2)O and Fe(SO4)(2)center dot 7H(2)O as the metal sources, 2-methylimidazole (2-MI) as the ligand and thioacetamide (TAA) as the S2- ion source. The as-prepared products were characterized by X-ray powder diffraction (XRD), energy dispersive spectrometry (EDS), inductively coupled plasma mass spectrometry (ICP-MS), X-ray photoelectron spectroscopy (XPS), (high-resolution) transmission electron microscopy (TEM/HRTEM) and HAADF-STEM-EDS elemental mapping. Experiments showed that the as-obtained Fe-doped Co-Mo-S microtube catalyst demanded overpotentials of similar to 105 and 268 mV to afford the current density of -10 mA cm(-2) for hydrogen evolution reaction (HER) and 10 mA cm(-2) for oxygen evolution reaction (OER) with a durability of 60 h in 1.0 M KOH solution, respectively. In a two-electrode water-splitting device, the as-prepared Fe-doped Co-Mo-S microtubes acted as both anode and cathode simultaneously. To deliver a current density of 10 mA cm(-2), a cell voltage of 1.605 V was required in 1.0 M KOH solution. After continuously catalyzing the overall water splitting for 60 h, the overpotential hardly changed, implying remarkable long-term stability. Obviously, the present Fe-doped Co-Mo-S microtubes have potential applications as bifunctional catalysts for electrochemical water splitting.
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