Analysis of the oxygen reduction reaction performance of Co-N-C nanocomposite materials
NIU Fu
LUAN Weiran
Abstract：In order to study the oxygen reduction reaction(ORR)performance of the cathode catalyst of proton exchange membrane fuel cells,Co-N-C nanocomposites are prepared by template method,hydrothermal method and high temperature pyrolysis reduction.The ORR performance of the catalyst samples at different cobalt nitrate mass and calcination temperatures is studied by cyclic voltammetry and linear scanning voltammetry with a three-electrode testing system,and the Pt-C catalyst is used as the standard catalyst for comparison.The experimental results show that the optimal calcination temperature of Co-N-C catalyst is 900℃;the half-wave potential and the limiting current density of the diffusion-controlled region of the Co-N-C-50-900 with a cobalt nitrate mass of 50 mg and calcination temperature of 900℃are to those of the standard catalyst,and the ORR performance is better;the catalytic process is dominated by 4-electron reaction,and the preparation method of catalyst is simple and convenient,with the low cost and meets the requirements of ORR for catalysts.
Keywords：fuel cellcatalystoxygen reduction reactioncalcination temperaturehalf-wave potential
Publication Date：2024-12-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 54-59 )