Preparation And Catalytic Performance Of Research On Key Technologies Of Co-se Compound By Electrodeposition

Fuel cell is a green power plant that can convert electrical energy stored in fuel directly into electrical energy by an electrochemical reaction.And people have been looking for alternatives to Pt non-precious metal fuel cell cathode catalyst to solve the problem of high cost.Co-Se compounds have strong catalytic ability for oxygen reduction reaction.Electrodeposition of Co-Se compounds can directly catalyze the catalyst directly to the active sites of the membrane electrode,which can greatly improve the utilization of the catalyst.In addition,the electrodeposition of Co-Se compound oxygen reduction catalyst has been studied in this paper.The electrochemical behavior of electrodeposited Se was studied by electrodeposition of Se film on copper alloy by constant potential electrodeposition.The results show that the deposition process of Se is carried out in three steps,Electron reduction,the occurrence of Se six electron reduction,and finally in the electrode surface chemical reduction.The effects of deposition potential,main salt concentration,temperature and pH on the morphology and structure of electrodeposited Se films were investigated.At 20 ? and 40 ?,red selenium and gray were obtained with monoclinic structure and hexagonal crystal structure selenium.The electrodeposition of Co-Se was studied by electrodeposition of Co-Se compound directly on carbon paper.The co-deposition process of Co-Se was studied.The co-deposition of Co-Se in aqueous solution was studied.The effect of sweeping velocity on the cyclic voltammetric behavior of Co-Se co-deposition was analyzed,and the control steps of the electrode process were analyzed.CoSe2 compounds with selenium-selenite structure were obtained by studying the technological conditions such as main salt concentration,main salt concentration ratio,deposition potential and temperature.The morphology,composition,structure and oxygen reduction performance were studied.The results show that there is good catalytic activity and catalytic stability in alkaline or acidic electrolytes.CoSe2 compound prepared by this method has the advantages of low cost,good catalytic performance and high stability,and is expected to be used in commercial fuel cell.