电催化间接氧化法制备活性二氧化锰  

PREPARATION OF ACTIVATED MANGANESE DIOXIDE BY INDIRECT ELECTROCATALYTIC OXIDATION

作　　者：李伟善[1] 江琳才[1] 

机构地区：[1]华南师范大学化学系

出　　处：《应用化学》1989年第6期86-88,共3页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金

摘　　要：电池工业目前使用的电解二氧化锰（EMD）,是采用直接电解氧化法制得的。由于产物紧附在阳极表面,需要剥离,无法连续生产,加上电解温度较高,电流密度偏低(0.01A·cm-2),生产效率不高,有待改进。 Boardman等报导Ag+离子对Mn2+阳极氧化有催化作用。本文在该工作的基础上提出一种电催化间接氧化制备二氧化锰（ECMD）的方法。An indirect. electro-oxidation method for the preparation of activated manganese dioxideis proposed based on the following electrocatalytic feactions:Ag^+→Ag^(2+)+e2Ag^(2+)+Mn^(2+)+2H_2O→MnO_2+2Ag^+ +4H^+ The process is carried out at room temperature with current density of ten to seventytimes as that used in the.commercial process.The product (ECMD) had discharge capacity11.5% more than that of EMD obtained by direct electrooxidation .The amount of combinedwater and the apparent surface area were 13.4% and 83.3 m^2. g^(-1), but 3.9% and 52.2m^2 g^(-1)for EMD sample respectively. The ECMD obtained contained 4.2% silver oxide.

关 键 词：活性二氧化锰 电催化 电化学氧化 

分 类 号：TQ137.12[化学工程—无机化工]