无机材料学报2015，Vol.30Issue(5)：493-499,7.DOI:10.15541/jim20140425
钌镧氧化物涂层析氯反应动力学比较研究
Comparative Study on Kinetics of Chlorine Evolution Reaction for Ru-La-O Oxide Coatings
摘要
Abstract
The Ti/RuO2 and Ti/Ru-La-O oxide coatings were prepared by thermal decomposition of the metal chlorides in the precursor solution. The specific adsorption of Clˉ on coatings, the effect of La on the chlorine evo-lution reactions (ClER) and the kinetic mechanism were investigated by using differential capacity (DC) and po-larization curves (PC). Results show that the coating surface exhibits significantly specific adsorption of Clˉ in NaCl neutral solution, which has an influence on the kinetics of the chlorine evolution process, resulting in an in-crease of the Tafel slope and a decrease of the reaction order. The addition of lanthanum reduces the overpotential of Ti/RuO2 coating and enhances the exchange current density, which improves the chlorine evolution reaction of the coatings. Both kinetic mechanisms of recombination and electrochemical desorption of adsorbed intermediate species for the coatings are comparatively studied. It is confirmed that the Chlorine evolution reaction on Ru-La-O oxide coatings in NaCl neutral solution is controlled by the process of 2≡ S· OCl* (rds→)≡ S·O +Cl2.关键词
特性吸附/钌镧氧化物/析氯反应/Volmer-Tafel机理/RuO2Key words
specific adsorption/Ru-La-O oxides/chlorine evolution reaction/Volmer-Tafel mechanism/RuO2分类
化学化工引用本文复制引用
龙萍,许立坤,崔秀芳,金国..钌镧氧化物涂层析氯反应动力学比较研究[J].无机材料学报,2015,30(5):493-499,7.基金项目
国家自然科学基金(51275105, 51375106) （51275105, 51375106）
国家重点基础研究发展计划(973)(2011CB013404) （973）
中央高校基本科研业务费(HEUCF20151013) National Natural Science Foundation of China(51275105, 51375106) （HEUCF20151013）
973 Program(2011CB013404) （2011CB013404）
Fundamental Research Funds for the Central Universities(HEUCF20151013) （HEUCF20151013）
