碱性介质中钯镍合金纳米线阵列电极对乙醇的电催化氧化  

Electrocatalytic Oxidation Palladium-Nickel Nanowires Arrays Electrode for Ethanol Electrooxidation in Alkaline Medium

作　　者：张敏 蔡志泉[2] 陈妹琼[2] 张燕[2] 孙二双[1] 程发良[1] 

机构地区：[1]东莞理工学院生物传感器研究中心,广东东莞523106 [2]东莞理工学院城市学院城环系,广东东莞523106

出　　处：《稀有金属》2014年第5期936-940,共5页Chinese Journal of Rare Metals

基　　金：国家自然科学基金项目(21375016);广东省自然科学基金项目(S2013010014324);东莞市科技计划项目(201010814013;2011108101016)资助

摘　　要：本文研究了一种简单、可控的方法制备直立金属纳米线阵列。采用恒电位法在多孔阳极氧化铝(AAO)模板中电沉积了钯镍(PdNi)合金纳米线阵列。高分辨扫描电子显微镜(HRSEM)图证明模板孔洞的填充率非常高,纳米线阵列的直径和模板的孔径一致,分布较均匀,纳米线的直径平均为60 nm。运用循环伏安法和计时电流法研究了钯镍纳米线阵列电极在碱性溶液中对乙醇的电催化氧化行为。结果表明,相比裸玻碳电极及PdNi膜电极,PdNi纳米线阵列电极在碱性溶液中对乙醇氧化具有更高的电催化活性,峰电流密度可达到32 mA·cm-2。研究了PdNi纳米线阵列电极对不同乙醇浓度的电催化氧化的影响。结果表明,乙醇的浓度从0.01 mol·L-1增加到2.00 mol·L-1,峰电流密度随乙醇的浓度增加而逐渐增大,峰电流密度与乙醇浓度存在一定的线性关系。Free-standing metal nanowire arrays were fabricated by a simple and controllable method in this study. Pd-Ni alloy nanowire arrays（ Pd-Ni NWAs） were fabricated in the nanopores of anodic aluminum oxide（ AAO） template by electrodeposition.High resolution scanning electron microscope（ HRSEM） images indicated that the Pd-Ni NWAs were highly uniform and ordered with high percentage of pore fillings. The average diameter of single Pd-Ni nanowire array was about 60 nm,which agreed well with the porous diameter of the template. Meanwhile,the electrocatalytic activity of Pd-Ni NWAs electrodes for ethanol oxidation in alkaline media was studied by cyclic voltammetry and chronoamperometry. The results showed that the obtained nanostructures exhibited better catalytic activity for ethanol electrooxidation compared with the glassy carbon electrode and PdNi film electrode,and the peak current density could reach 32 mA·cm^-2. The Pd-Ni NWAs electrodes in different concentrations of ethanol were studied. The results showed that the current density increased as the concentration increased. The linear regression equation was obtained for the ethanol concentration ranging from 0. 01 to 2. 00 mol·L^-1.

关 键 词：AAO模板 钯镍纳米线阵列 乙醇 电催化氧化 

分 类 号：O643.3[理学—物理化学]