钛基钌系氧化物涂层阳极电催化水处理活性与失活  

Activation and Deactivation of Titanium-based Ruthenium Oxide Coating Anode in Electrocatalysis Water Treatment

作　　者：戴红[1] 徐杉[1] 黄焱[1] 何松林[1] DAI Hong;XU Shan;HUANG Yan;HE Songlin(Kunming University,Kunming 650214,China)

机构地区：[1]昆明学院

出　　处：《贵金属》2019年第3期70-75,83,共7页Precious Metals

基　　金：昆明学院科研基金项目(YJL17001)

摘　　要：电催化氧化是一种环境友好型水处理技术。钛基钌系氧化物涂层阳极在电催化水处理中的活性与失活对其使用效率和寿命至关重要。钛基钌系氧化物涂层阳极电催化活性主要来源于氧化物原子桥位产生的活性位及表面电子态,活性机理可归为价态转变、晶格氧输运及原位吸附活性位的产生。阳极失活主要是涂层溶蚀、TiO2钝化膜生成和涂层“毒化”等原因造成。通过增加中间层、掺杂、构建梯度型涂层及消除p-n结等途径可抑制阳极失活,提高使用寿命。Electrocatalytic oxidation(ECO)is an environment-friendly technology in water treatment.The activation and deactivation of titanium-based ruthenium oxide coating anode in electrocatalytic water treatment are very critical to their efficiency and life.Activity of anode mainly derives from active sites generated by bridge sites and surface electron state.Mechanisms of electrocatalytic activity can be classified into chemical states transition,lattice oxygen transport and generation of in situ adsorption activity sites.Deactivation of anode is mainly attributed to coating corrosion,TiO2 passivation membrane formation and coating"poisoning".The anode deactivation and service life can be improved by adding intermediate layer,doping,constructing a gradient coating and eliminating p-n junction.

关 键 词：物理化学 钛基钌系氧化物涂层阳极 催化 活性与失活 

分 类 号：O643.3[理学—物理化学] O646.5[理学—化学]