摘要
采用溶胶-凝胶法(sol-gel)制备纳米TiO2(Ti/nano-TiO2)膜电极,再用电沉积法在纳米TiO2膜上修饰Pt微粒,制成Ti/nano-TiO2-Pt复合电极。用循环伏安法研究了纯Pt丝电极和Ti/nano-TiO2-Pt电极对甲醇氧化的电催化活性以及稳定性。结果表明:对甲醇氧化,复合电极比Pt丝电极具有更高的催化活性,且对甲醇氧化中间产物CO的吸附量少,因而不易中毒;复合电极载铂量达到一定值时,电极具有最强的催化活性。
The Ti-based nanocrystalline TiO2 film electrode （Ti/nano-TiO2） was prepared by sol-gel method, and it was modified with Pt forming Ti/nano-TiO2-Pt composite electrode. The electrocatalytic activity of Ti/nano-TiO2-Pt composite electrode and pure Pt wire electrode for oxidation of methanol was smdied by the cyclic voltammetry. The results showed that the composite electrode possesses higher catalytic activity for methanol oxidation and fewer amount of CO adsorption compared with those of Pt wire electrode, it has better stability; and that the catalytic activity of the composite electrode relates to Pt loading, when the Pt loading reaches a certain value, the maximum catalytic activity can be obtained.
出处
《贵金属》
CAS
CSCD
2007年第1期14-17,共4页
Precious Metals
