Mn3O4-Ni/C@FeOOH复合材料的界面构筑及其在电解水制氢中的应用OA

In order to prepare a high efficiency and low energy consumption catalyst for hydrogen production by electrolytic water,this study utilized a solvothermal method to prepare Ni-doped precursor Mn-Ni MIL,which was then carbonized into Mn3O4-Ni/C substrate through high-temperature heat treatment.Subsequently,amorphous FeOOH ultrafine particles were deposited on the surface of the Mn3O4-Ni/C substrate using a water bath precipitation method,resulting in a composite material containing Mn,Ni,and Fe metal elements,namely Mn3O4-Ni/C@FeOOH.Based on morphology and structural characterization,it was found that the Mn3O4-Ni/C@FeOOH composite material retained the octahedral morphology of the precursor.The Ni was uniformly distributed in metallic form within the carbonaceous substrate,and the loading of FeOOH ensured a high specific surface area of the material,providing sufficient active sites for subsequent catalytic reactions.Electrochemical test results demonstrated excellent oxygen evolution reaction catalytic activity of the obtained composite material Mn3O4-Ni/C@FeOOH in alkaline electrolysis,with an overpotential of 288 mV at a driving current density of 10 mA/cm2.Compared to the individual components Mn3O4-Ni/C(334 mV)and FeOOH(342 mV)before composite formation,this represented an improvement of 14％and 16％,respectively.This study has shown that the Mn3O4-Ni/C@FeOOH composite material synthesized through interface engineering has a competitive advantage of low cost and long-term stability,making it promising for commercial applications.