采用溶剂热法制备了SnO2纳米棒载体,用溶剂热还原法制备了Pd/SnO2催化剂和不同Pd/Sb原子数比的系列PdSb/SnO2复合催化剂.用XRD、SEM、TEM、EDS等手段对样品进行分析表征,并以循环伏安法对比评价催化剂对甲酸的电催化氧化性能.表征结果表明,制备所得SnO2纳米棒载体为针状,大小均匀,平均直径为100 nm;负载所得催化剂中活性粒子大小约为13.5 nm,掺杂Sb后,粒径约为9.5 nm.电催化氧化性能对比结果表明,Pd/Sb原子数比为4:1的Pd4Sb/SnO2复合催化剂对甲酸的氧化具有较好的催化能力,当E=0.25 V(vs SCE)时,Pd4Sb/SnO2上甲酸氧化的峰电流密度达到25 mA/cm2,远远高于Pd/SnO2催化剂.
SnO2 nanorod carrier was prepared by the solvothermal method, and the Pd/SnO2 catalysts and a series of PdSb/SnO2 composite catalysts with different Pd/Sb atomic ratios were prepared by the solvothermal reduction method. The samples were characterized by XRD, SEM, TEM and EDS. Cyclic voltammetry was used to investigate the catalytic activity of the Pd/SnO2 and PdSb/SnO2 catalysts on the formic acid oxidation. The results revealed that SnO2 nanorod carrier was needle-shaped and its average diameter was about 100 nm; The active particle size of the supported catalyst was about 13.5 nm, while it was about 9.5 nm after the addition of Sb. The comparison results of electrocatalytic oxidation showed that Pd4Sb/SnO2 (withnPd:nSb=4:1) catalyst exhibited the best catalytic activity. And the current density of the Pd4Sb/SnO2 catalyst was about 25 mA/cm2 whenE= 0.25 V (vs SCE) which is far higher than that of the Pd/SnO2.
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