Chinese Journal of Catalysis ›› 2021, Vol. 42 ›› Issue (12): 2275-2286.DOI: 10.1016/S1872-2067(21)63902-5

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Template-free synthesis of Co3O4 microtubes for enhanced oxygen evolution reaction

Jiani Hua,†, Xiaofeng Zhanga,†, Juan Xiaob, Ruchun Lia, Yi Wangb, Shuqin Songa,*()   

  1. aThe Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province, PCFM Lab, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong, China
    bSchool of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519000, Guangdong, China
  • Received:2021-02-05 Accepted:2021-02-05 Online:2021-12-18 Published:2021-09-10
  • Contact: Shuqin Song
  • About author:* E-mail: stsssq@mail.sysu.edu.cn
    First author contact:

    Contributed equally.

  • Supported by:
    National Natural Science Foundation of China(21975292);National Natural Science Foundation of China(21978331);National Natural Science Foundation of China(21905311);Guangdong Basic and Applied Basic Research Foundation(2020A1515010343);Guangdong Basic and Applied Basic Research Foundation(2021A1515010167);Fundamental Research Funds for Central Universities(19lgpy136);Fundamental Research Funds for Central Universities(19lgpy116);National Undergraduate Training Program for Innovation and Entrepreneurship(202010558059)

Abstract:

To fully exploit the superiority of tubular structures, in this study, we systematically explore the optimal preparation conditions for Ni/Co3O4, including cation species and content, additive species and content, and anion species. Our results reveal that the formation of an initial cobalt nickel acetate hydroxide prism is the key factor and directly affects the final microtubular structure. Moreover, P is subsequently doped into the Ni/Co3O4 lattice to increase the M3+/M2+ molar ratio (M = Co and Ni), promote reaction kinetics, and optimize electronic structure. Consequently, the oxygen evolution reaction performance of P-doped tubular Ni/Co3O4 is significantly higher than that of undoped Ni/Co3O4 and the state-of-the-art RuO2 electrocatalyst.

Key words: Oxygen evolution reaction, Co3O4, Microtube, P doping