摘要
将CeO2溶胶与Pt／C催化剂机械混合制备了Pt-CeO2／C催化剂，研究了酸性条件下Pt-CeO2／C催化剂对甲醇氧化的电催化活性。结果表明，与Pt／C催化剂相比，Pt-CeO2／C催化剂对甲醇展现出更好的催化活性。XRD和TEM测试结果表明，Pt-CeO2／C催化剂中Pt与CeO2的平均粒径均为3-4nm。对CeO2含量不同的Pl-CeO2／C催化剂在CH3OH-H2SO4中进行循环伏安测试发现，Pt-CeO2／C催化剂对甲醇氧化的电催化活性较高，其中Pt与CeO2质量比为1：1时，催化剂的催化活性最高，对甲醇氧化的峰电流密度达到0．112A／cm^2。
Highly dispersed Pt-CeO2/C elecaode was prepared by mixing ceria sol with Pt/C powder, and electro-oxidation of methanol was studied in sulfuric acid electrolyte at room temperature on Pt-CeO2/C catalyst. It was found that the Pt-CeO2/C catalyst exhibited a higher catalytic activity towards methanol electro-oxidation than Pt/C catalyst. Transmission electron microscopy （TEM） and X-ray diffraction （XRD） analyses indicated the formation of homogenous mixtures of ceria and Pt nanometer particles with size of around 3-4 nm on carbon support. Electro-oxidation of methanol was studied on the Pt-CeO2/C electrodes employing various amounts of CeO2 in sulfuric acid electrolyte at room temperature. The electrochemical characterization by cyclic vohammetry（CV） and chronoamperometry demonstrated that the catalytic activity of the Pt-CeO2/C was highest when the mass ratio of Pt： CeO2 was 1 ： 1, where the current density for electro-oxidation of methanol was 0.112 A/cm^2.
出处
《应用化学》
CAS
CSCD
北大核心
2007年第12期1378-1382,共5页
Chinese Journal of Applied Chemistry
基金
黑龙江省科技攻关项目(GC04A207)
黑龙江大学学生学术科技创新项目资金资助
