摘要
采用复合电沉积技术制备了ＷＣ微粒弥散于ＰｂＯ_２中的ＰｂＯ_２－ＷＣ复合电极，研究了相结构及在Ｈ_２ＳＯ_４介质中阳极析氧反应的性能。结果表明，与不含ＷＣ微粒的ＰｂＯ_２电极比较，ＷＣ微粒改变了ＰｂＯ_２电沉积的方式，复合电极的结晶更为细小和致密，α－ＰｂＯ_２的含量更高，晶体产生了择优取向。该复合电极在０．５ｍｏｌ／ＬＨ_２ＳＯ_４溶液中阳极析氧的电催化活性提高近１倍，其化学稳定性和电化学稳定性良好。
PbO2-WC composite electrode formed by dispersion of WC particles in PbO2 wasprepared by using composite electrodeposition technique.The crystallographic structure andperformance of anodic oxygen evolution reaction in sulfuric acid medium of the compositeelectrode were studied.The results show that,as compared with the PbO2 electrode contain-ing no WC particles,the PbO2-WC composite electrode is smaller in crystal grain and morecompact in structure,its α-PbO2 content is higher and crystallites are preferentially orientat-ed.Electrocatalytic activity for oxygen evolution reaction in 0.5mol/L H2SO4 solution of thecomposite electrode is increased nearly by one-fold. Chemical stability and electrochemicalstability of the composite coating are excellent.
出处
《应用化学》
CAS
CSCD
北大核心
1995年第5期46-49,共4页
Chinese Journal of Applied Chemistry
关键词
复合电极
析氧
电催化
二氧化铅
WC微粒
PbO2,WC,composite electrode,oxygen evolution,electrocatalysis
