Au-Pt/SnO2/GC composite electrode was prepared by self-assembling Au-Pt nanoparticles on SnO2 film, which was deposited on actived glassy carbon (GC). Atomic force microscopy (AFM) and scanning electron microscopy...Au-Pt/SnO2/GC composite electrode was prepared by self-assembling Au-Pt nanoparticles on SnO2 film, which was deposited on actived glassy carbon (GC). Atomic force microscopy (AFM) and scanning electron microscopy (SEM) images revealed that dense and uniform Au-Pt particles with 25-nm diameter were dispersed on SnO2 film. X-ray photoelectron spectroscopy (XPS) results proved that there was an interaction between Au-Pt nanoparticles and SnO2 support. Electrochemical experiments showed that Au-Pt/SnOz/GC composite electrode had a good electrocatalytic activity to the oxidation of methanol展开更多
采用水热法制备了高分散碳载Pt/C和Pt-SnO2/C电催化剂。采用XRD、SEM、TEM和激光粒度仪等方法对制得的纳米催化剂进行了表面微观结构分析。采用电化学工作站测试循环伏安曲线(CV)等表征Pt/C和Pt-SnO2/C纳米催化剂电催化活性。测试结果表...采用水热法制备了高分散碳载Pt/C和Pt-SnO2/C电催化剂。采用XRD、SEM、TEM和激光粒度仪等方法对制得的纳米催化剂进行了表面微观结构分析。采用电化学工作站测试循环伏安曲线(CV)等表征Pt/C和Pt-SnO2/C纳米催化剂电催化活性。测试结果表明,Pt-SnO2/C纳米催化剂的峰电流密度(131.05 m A·cm-2)是Pt/C催化剂的峰电流密度(65.48 m A·cm-2)的2倍;Pt-SnO2/C催化的电化学表面积(108.4 m2·g-1)远高于Pt/C催化剂的电化学表面积(99.14 m2·g-1);Pt-SnO2/C纳米粒子比Pt/C纳米粒子具有更强的抗CO中毒能力和更高的电催化活性。展开更多
基金supported by the High-Tech Research and Development Program of China (No. 2007AA03Z219)the Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality, and the Beijing Natural Science Foundation (No. 207001)
文摘Au-Pt/SnO2/GC composite electrode was prepared by self-assembling Au-Pt nanoparticles on SnO2 film, which was deposited on actived glassy carbon (GC). Atomic force microscopy (AFM) and scanning electron microscopy (SEM) images revealed that dense and uniform Au-Pt particles with 25-nm diameter were dispersed on SnO2 film. X-ray photoelectron spectroscopy (XPS) results proved that there was an interaction between Au-Pt nanoparticles and SnO2 support. Electrochemical experiments showed that Au-Pt/SnOz/GC composite electrode had a good electrocatalytic activity to the oxidation of methanol
文摘采用水热法制备了高分散碳载Pt/C和Pt-SnO2/C电催化剂。采用XRD、SEM、TEM和激光粒度仪等方法对制得的纳米催化剂进行了表面微观结构分析。采用电化学工作站测试循环伏安曲线(CV)等表征Pt/C和Pt-SnO2/C纳米催化剂电催化活性。测试结果表明,Pt-SnO2/C纳米催化剂的峰电流密度(131.05 m A·cm-2)是Pt/C催化剂的峰电流密度(65.48 m A·cm-2)的2倍;Pt-SnO2/C催化的电化学表面积(108.4 m2·g-1)远高于Pt/C催化剂的电化学表面积(99.14 m2·g-1);Pt-SnO2/C纳米粒子比Pt/C纳米粒子具有更强的抗CO中毒能力和更高的电催化活性。