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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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聚乙烯吡咯烷酮对pbo2电极微结构和性能的影响
Keywords: 材料表面与界面,改性二氧化铅电极,聚乙烯吡咯烷酮(pvp),电化学性能
Abstract:
？采用电沉积法制备不同浓度聚乙烯吡咯烷酮(pvp)改性pbo2电极,通过sem、xrd、电化学阻抗谱(eis)和线性极化(va)等方法表征其微结构和电化学性能,研究了pvp对电极电化学性能的影响。结果表明,pvp的包覆和空间位阻作用可抑制晶粒生长速度和团聚作用,使电极表面晶粒细化均匀,微结构得以改善;改性pbo2电极具有更低的电化学反应电阻和更高的析氧电位;适量的pvp掺杂可有效提高电极的电催化性能,其中0.4g?l-1pvp改性电极的电催化活性最佳。最佳改性pbo2电极显示了良好的耐腐蚀性和电催化稳定性,使用90h后其降解率仍能达到81.5%。
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