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Journal of Electrochemistry ›› 2020, Vol. 26 ›› Issue (1): 136-147.  doi: 10.13208/j.electrochem.190114

Special Issue: “电催化和燃料电池”专题文章

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Preparations of Nickel-Iron Hydroxide/Sulfide and Their Electrocatalytic Performances for Overall Water Splitting

LU Hang-shuo1, HE Xiao-bo2,3, YIN Feng-xiang1,2,3,*(), LI Guo-ru2   

  1. 1. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
    2. Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
    3. Changzhou Institute of Advanced Materials, Beijing University of Chemical Technology, Changzhou 213164, Jiangsu, China
  • Received:2019-01-14 Revised:2019-04-01 Online:2020-02-28 Published:2019-03-29
  • Contact: YIN Feng-xiang E-mail:yinfx@cczu.edu.cn


The Ni-Fe/Ti oxygen evolution electrode was prepared by electrodeposition on a titanium mesh substrate. Then, the as prepared Ni-Fe/Ti electrode was used to derive the Ni-Fe-S/Ti hydrogen evolution electrode through solid phase sulfuration. The effects of the molar ratio of Ni 2+ to Fe 3+ in the electrolyte and the amount of thiourea on the structures and electrochemical performances of Ni-Fe/Ti and Ni-Fe-S/Ti electrodes were investigated. The results show that the oxygen evolution performance of Ni-Fe/Ti electrode was first increased and then decreased with the increase of nickel ion content in the electrolyte. The Ni9Fe1/Ti electrode exhibited the best oxygen evolution performance. With the increase of thiourea addition, the hydrogen evolution performance of Ni-Fe-S/Ti electrode was increased firstly and then decreased. The Ni9Fe1S0.25/Ti electrode showed the best hydrogen evolution performance. To achieve a current density of 50 mA·cm -2, an overpotential of 280 mV was required for oxygen evolution reaction (OER) with the Ni9Fe1/Ti electrode, while 269 mV for hydrogen evolution reaction (HER) with the Ni9Fe1S0.25/Ti electrode, both with good stabilities. Accordingly, the Ni9Fe1/Ti and Ni9Fe1S0.25/Ti electrode were used as anodes and cathodes, respectively, for overall water splitting tests. The current density of 50 mA·cm -2 was achieved at a voltage of 1.69 V, showing the good catalytic performance of overall water splitting.

Key words: nickel-iron hydroxide, nickel-iron sulfide, oxygen evolution reaction, hydrogen evolution reaction, overall water splitting

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