摘要
运用电化学方法评价了电化学阴极还原 -阳极氧化两步法制得的以钛为基体的铂修饰的钛氧化物 ( Pt-Ti Ox/Ti)电极对甲醇电催化氧化的性能 ,结果表明 ,制得的修饰电极对甲醇氧化呈现了很高的电催化活性和好的稳定性 .通过 X光电子能谱 ( XPS)、扫描隧道显微镜 ( STM)和现场傅立叶变换红外 ( FTIR)反射光谱等技术 ,发现修饰电极对甲醇氧化具有高的电催化性能 ,可归属于纳米级 Pt粒子在 Ti Ox中的高度分散及由于 Pt和 Ti Ox的相互作用 ,使电极表面对甲醇氧化中间产物
Electrocatalytic performance of the Pt TiO x /Ti electrode prepared with electrochemical reduction oxidation method toward the oxidation of methanol has been studied. The experimental results showed that the Pt TiO x /Ti electrode has a high electrocatalytic activity and good stability for the electrocatalytic oxidation of methanol. By means of electrochemical, XPS, STM and in situ FTIR techniques, it was found that one reason for the electrode to exhibit an excellent performance is attributed to the high dispersion between nanosized Pt and TiO x particles. The low adsorption ability of the intermediate derived from methanol, such as linearly adsorbed CO species on the electrode surface due to the interaction between Pt and TiO x , also results in the excellent performance.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第8期1283-1287,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金! (批准号 :2 96 76 0 41 )
江苏省教育委员会自然科学基金资助
