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Confined pyrolysis synthesis of well-dispersed cobalt copper bimetallic three-dimensional N-doped carbon framework as effi-cient water splitting electrocatalyst 

Hydrogen is one of the most desirable alternatives to fossil fuels due to its renewability and large energy density. Electrochemical water split-ting, as an environmental-friendly way to produce H2 of high-purity, is drawing more and more attention. Conductive nitrogen-doped carbon framework derived from metal–organic frameworks (MOFs) have been applied as promising electrocatalysts thanks to their superior conduc-tivity, numerous active sites and hierarchical porous structures. How-ever, traditional uncontrolled pyrolysis will lead to aggregation or fusion of the metal sites in MOFs or even cause collapse of the three-dimensional structures. Herein, we provide a confinement py-rolysis strategy to fabricate CoCu bimetallic N-doped carbon frame-work derived from MOFs, which exhibits satisfactory catalytic perfor-mance with overpotentials of 199 mV  towards hydrogen evolution reaction and 301 mV towards oxygen evolution reaction to reach 10 mA cm−2 in an alkaline solution. This work presents further inspirations for preserving the original skeleton of MOFs during high temperature pyrolysis in order to obtain more stable and efficient electrocatalyst.#br#

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  1. 1. State Key Laboratory of Inorganic Synthesis & Preparative Chemistry, Jilin University, Changchun 130012, P. R. China.
    2. College of Chemistry, Jilin University, Changchun 130012, P. R. China.

  • Received:2021-12-24 Revised:2022-01-10 Accepted:2022-01-11 Published:2022-02-17
  • Contact: Shi Zhan zshi@mail.jlu.edu.cn  Peng Yu pengyu@jlu.edu.cn
  • Supported by:
     the Foundation of Science and Technology Development of Jilin Province, China (20200801004GH), the National Natural Science Foundation of China (21771084, 21771077, 21621001) and 111 Project (B17020). The authors also gratefully acknowledge the financial support by the program for JLU Science and Technology Innovative Research Team (JLUSTIRT).

Abstract: Hydrogen is one of the most desirable alternatives to fossil fuels due to its renewability and large energy density. Electrochemical water split-ting, as an environmental-friendly way to produce H2 of high-purity, is drawing more and more attention. Conductive nitrogen-doped carbon framework derived from metal–organic frameworks (MOFs) have been applied as promising electrocatalysts thanks to their superior conduc-tivity, numerous active sites and hierarchical porous structures. How-ever, traditional uncontrolled pyrolysis will lead to aggregation or fusion of the metal sites in MOFs or even cause collapse of the three-dimensional structures. Herein, we provide a confinement py-rolysis strategy to fabricate CoCu bimetallic N-doped carbon frame-work derived from MOFs, which exhibits satisfactory catalytic perfor-mance with overpotentials of 199 mV  towards hydrogen evolution reaction and 301 mV towards oxygen evolution reaction to reach 10 mA cm−2 in an alkaline solution. This work presents further inspirations for preserving the original skeleton of MOFs during high temperature pyrolysis in order to obtain more stable and efficient electrocatalyst.


Key words: MOF derivatives, hydrogen evolution reaction, oxygen evolution reac-tion, water splitting, N-doped carbon framework