Hydrogen is one of the most desirable alternatives to fossil fuels due to its renewability and large energy density.Electrochemical water splitting,as an environmental-friendly way to produce H_(2) of high-purity,is d...Hydrogen is one of the most desirable alternatives to fossil fuels due to its renewability and large energy density.Electrochemical water splitting,as an environmental-friendly way to produce H_(2) of high-purity,is drawing more and more attention.Conductive nitrogen-doped carbon frameworks derived from metal-organic frameworks(MOFs)have been applied as promising electrocatalysts thanks to their superior conductivity,numerous active sites and hierarchical porous structures.However,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 pyrolysis strategy to fabricate a CoCu bimetallic N-doped carbon framework derived from MOFs,which exhibits satisfactory catalytic performance 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.展开更多
基金This work was supported by the Foundation of Science and Technology Development of Jilin Province,China(No.20200801004GH)the National Natural Science Foundation of China(Nos.21771084,21771077,21621001)the 111 Project of China(No.B17020).
文摘Hydrogen is one of the most desirable alternatives to fossil fuels due to its renewability and large energy density.Electrochemical water splitting,as an environmental-friendly way to produce H_(2) of high-purity,is drawing more and more attention.Conductive nitrogen-doped carbon frameworks derived from metal-organic frameworks(MOFs)have been applied as promising electrocatalysts thanks to their superior conductivity,numerous active sites and hierarchical porous structures.However,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 pyrolysis strategy to fabricate a CoCu bimetallic N-doped carbon framework derived from MOFs,which exhibits satisfactory catalytic performance 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.
