能源化学(英文版) ›› 2019, Vol. 39 ›› Issue (12): 182-187.

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Facile synthesis of V-doped CoP nanoparticles as bifunctional electrocatalyst for efficient water splitting

Jun-Feng Qina, Jia-Hui Lina, Tian-Shu Chena, Da-Peng Liua, Jing-Yi Xiea, Bao-Yu Guoa, Lei Wangb, Yong-Ming Chaia, Bin Donga   

  1. a State Key Laboratory of Heavy Oil Processing, Institute of New Energy, China University of Petroleum(East China), Qingdao 266580, Shandong, China;
    b Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China
  • 收稿日期:2018-10-31 修回日期:2019-01-27 出版日期:2019-12-15 发布日期:2020-12-18
  • 通讯作者: Yong-Ming Chai, ymchai@upc.edu.cn; Bin Dong, dongbin@upc.edu.cn
  • 基金资助:
    This work was financially supported by the National Natural Science Foundation of China (21776314), Major Program of Shandong Province Natural Science Foundation (ZR2018ZC0639), Shandong Provincial Natural Science Foundation (ZR2017MB059), the Fundamental Research Funds for the Central Universities (18CX05016A) and Postgraduate Innovation Project of China University of Petroleum (YCX2018034).

Facile synthesis of V-doped CoP nanoparticles as bifunctional electrocatalyst for efficient water splitting

Jun-Feng Qina, Jia-Hui Lina, Tian-Shu Chena, Da-Peng Liua, Jing-Yi Xiea, Bao-Yu Guoa, Lei Wangb, Yong-Ming Chaia, Bin Donga   

  1. a State Key Laboratory of Heavy Oil Processing, Institute of New Energy, China University of Petroleum(East China), Qingdao 266580, Shandong, China;
    b Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China
  • Received:2018-10-31 Revised:2019-01-27 Online:2019-12-15 Published:2020-12-18
  • Contact: Yong-Ming Chai, ymchai@upc.edu.cn; Bin Dong, dongbin@upc.edu.cn
  • Supported by:
    This work was financially supported by the National Natural Science Foundation of China (21776314), Major Program of Shandong Province Natural Science Foundation (ZR2018ZC0639), Shandong Provincial Natural Science Foundation (ZR2017MB059), the Fundamental Research Funds for the Central Universities (18CX05016A) and Postgraduate Innovation Project of China University of Petroleum (YCX2018034).

摘要: Adjusting the intrinsic activity and conductivity of electrocatalysts may be a crucial way for excellent performance for water splitting. Herein, the rational design of vanadium element doped cobalt phosphide (V-doped CoP) nanoparticles has been investigated through a facile gaseous phosphorization using cobalt vanadium oxide or hydroxide (Co-V hydr(oxy)oxide) as precursor. The physical characterization shows that the homogeneous dispersion of V element on V-doped CoP nanoparticles have obtained, which may imply the enhanced electrocatalytic activity for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The electrochemical measurements of the prepared V-doped CoP in alkaline electrolyte demonstrate the superior electrocatalytic activity for both HER (overpotential of 235 mV@10 mA cm-2) and OER (overpotential of 340 mV@10 mA cm-2). Further, V-doped CoP nanoparticles used as anode and cathode simultaneously in a cell require only 370 mV to achieve a current density of 10 mA cm-2. The outstanding electrocatalytic activity may be ascribed to the improved conductivity and intrinsic activity owing to phosphating and the doping of V element. In addition, the long-term stability of V-doped CoP has been obtained. Therefore, metal doping into transition metal-based phosphides may be a promising strategy for the remarkable bifunctional electrocatalyst for water splitting.

关键词: V element, Doping, Bifunctional, Phosphorization, Electrocatalyst, Water splitting

Abstract: Adjusting the intrinsic activity and conductivity of electrocatalysts may be a crucial way for excellent performance for water splitting. Herein, the rational design of vanadium element doped cobalt phosphide (V-doped CoP) nanoparticles has been investigated through a facile gaseous phosphorization using cobalt vanadium oxide or hydroxide (Co-V hydr(oxy)oxide) as precursor. The physical characterization shows that the homogeneous dispersion of V element on V-doped CoP nanoparticles have obtained, which may imply the enhanced electrocatalytic activity for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The electrochemical measurements of the prepared V-doped CoP in alkaline electrolyte demonstrate the superior electrocatalytic activity for both HER (overpotential of 235 mV@10 mA cm-2) and OER (overpotential of 340 mV@10 mA cm-2). Further, V-doped CoP nanoparticles used as anode and cathode simultaneously in a cell require only 370 mV to achieve a current density of 10 mA cm-2. The outstanding electrocatalytic activity may be ascribed to the improved conductivity and intrinsic activity owing to phosphating and the doping of V element. In addition, the long-term stability of V-doped CoP has been obtained. Therefore, metal doping into transition metal-based phosphides may be a promising strategy for the remarkable bifunctional electrocatalyst for water splitting.

Key words: V element, Doping, Bifunctional, Phosphorization, Electrocatalyst, Water splitting