Controlled synthesis of tubular ferrite MFe2O4 (M = Fe, Co, Ni) microstructures with efficiently electrocatalytic activity for water splitting

被引:30
作者
Yuan, Feifei [1 ,2 ]
Cheng, Xiaomei [1 ]
Wang, Meifang [1 ]
Ni, Yonghong [1 ]
机构
[1] Anhui Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Mol Solids,Minist Educ, Anhui Lab Mol Based Mat,Anhui Key Lab Funct Mol S, 189 Jiuhua Southern Rd, Wuhu 241002, Peoples R China
[2] Bengbu Med Coll, Sch Basic Courses, 2600 Donghai Rd, Bengbu 233030, Peoples R China
基金
中国国家自然科学基金;
关键词
Ferrite; Tubular microstructures; Electrocatalyst; Water splitting; HYDROGEN-EVOLUTION REACTION; FORMATION MECHANISM; OXYGEN REDUCTION; NANOWIRE ARRAYS; XPS SPECTRA; NICKEL; PERFORMANCE; METAL; ELECTROCHEMISTRY; NANOPARTICLES;
D O I
10.1016/j.electacta.2019.134883
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Ferrite MFe2O4 (M = Fe, Co, Ni) tubular microstructures were successfully synthesized through a simple two-step strategy. The tubular FeOOH microstructures were first obtained by a heating reflux route. Then, tubular ferrite MFe2O4 (M = Fe, Co, Ni) microstructures were produced by a solvothermal method. The as-prepared products were characterized by the powder X-ray diffraction (XRD), the field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and EDS mapping. Experiments showed that as-obtained ferrite catalysts demanded the overpotentials of -201 similar to-359 mV or similar to 340-432 mV to afford the current density of -/+10 mA cm(-2) for hydrogen evolution reaction (HER) or oxygen evolution reaction (OER) with long-term durability for 50 h in 1.0 M KOH solution. Among them, NiFe2O4 tubular microstructures presented the best electrocatalytic activities for HER and OER due to the largest BET specific surface area, the highest electrochemical active surface area and the smallest chargetransfer resistance. Obviously, the present ferrite tubular microstructures have potential application as a bifunctional electrocatalyst for full water splitting. (C) 2019 Elsevier Ltd. All rights reserved.
引用
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页数:11
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