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采用溶剂热法制备了SnO_2纳米棒,以其为载体,采用溶剂热还原法制备Pd-X/SnO_2复合催化剂,通过X射线衍射(XRD)、扫描电镜(SEM)及X射线能谱仪(EDS)对复合催化剂进行表征,采用循环伏安法考察了Pd/SnO_2掺杂非贵金属Co、Zn、Fe和Sb复合催化剂对乙醇氧化电催化性能的影响。结果表明:SnO_2纳米棒呈针尖状,大小均匀,长度为600nm,平均直径约为100nm,Pd粒子高度分散在SnO_2纳米棒表面;在1mol/L KOH+1mol/L C_2H_5OH溶液中,制得的Pd-X(Co、Zn、Fe、Sb)复合催化剂对乙醇氧化均具有较好的催化活性,其中Pd-Zn/SnO_2催化剂表现了最佳的催化性能;当E=-0.2V时,Pd-Zn/SnO_2催化乙醇氧化的峰电流密度可达为30.7mA/cm~2。
SnO 2 nanorods were prepared by solvothermal method. Pd-X / SnO 2 composite catalysts were prepared by solvothermal reduction method using X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray energy dispersive spectroscopy ) Were used to characterize the composite catalysts. The effects of Pd / SnO 2 -doped non-noble metal catalysts Co, Zn, Fe and Sb on the electrocatalytic oxidation of ethanol were investigated by cyclic voltammetry. The results showed that the SnO 2 nanorods were needle-like and uniform in size with a length of 600 nm and an average diameter of about 100 nm. The Pd particles were highly dispersed on the surface of the SnO 2 nanorods. In the solution of 1 mol / L KOH + 1 mol / L C 2 H 5 OH, -X (Co, Zn, Fe, Sb) catalysts exhibited good catalytic activity for the oxidation of ethanol, and the Pd-Zn / SnO 2 catalyst exhibited the best catalytic performance. When E = -0.2V, / SnO 2 catalytic ethanol oxidation peak current density of up to 30.7mA / cm ~ 2.