甲酸在纳米Pt/PdNWAs电极上的电催化氧化

Electrocatalytic oxidation of formic acid on Pt nanoparticle/Pd nanowire electrode

用多孔氧化铝为模板,通过恒电位法沉积制得钯(Pd)纳米线,再用循环伏安法在Pd纳米线表面沉积铂(Pt)纳米粒子,制得纳米Pt/PdNWAs复合催化剂,并用扫描电镜进行了表征。结果表明,纳米Pt/PdNWAs电极相比PdNWAs电极和纳米Pt电极,对甲酸具有更高的电催化氧化活性和稳定性,甲酸的浓度为1.00mol/L时,经直接途径氧化的峰电流达到12.33mA,而经间接途径氧化的峰电流达到10.85mA。

Highly ordered Pd nanowires were prepared by constant potential deposition method using the porous a- nodic aluminum oxide （AAO） template and Pt nanoparticles were deposited on the Pd nanowires to prepare Pt nanoparti- cles/Pd nanowires composite catalyst,then characterized by scanning electron microscopy. The results showed that the Pt nanoparticles/Pd nanowires electrode exhibited higher electroeatalytic activity and better stability than that of Pt nanoparti- cles electrode and Pd nanowires electrode. When the concentration of formic acid was 1.00mol/L, the peak currents were 12.33mA and 10.85mA obtained from direct and indirect oxidation respectively.