纳米Pd的六角相液晶模板合成及对乙醇的电催化氧化*

doi:10.11901/1005.3093.2013.869

材料研究学报

2014, Vol. 28

Issue (6): 413-419 DOI: 10.11901/1005.3093.2013.869

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纳米Pd的六角相液晶模板合成及对乙醇的电催化氧化*

王艳丽¹(

),谭德新²,陈森¹,卞玲¹

1. 安徽理工大学材料科学与工程学院淮南 232001
2. 安徽理工大学化学工程学院淮南 232001

Synthesis of Nano-Pd Particles in a Quaternary System with a Hexagonal Liquid Crystal as Template and Their Electrocatalytic Activity for Oxidation of Ethanol

Yanli WANG^1,^**(

),Dexin TAN²,Sen CHEN¹,Ling BIAN¹

1. Institute of Materials Science and Engineering, Anhui University of Science and
Technology, Huainan 232001
2. Institute of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001

引用本文:

王艳丽,谭德新,陈森,卞玲. 纳米Pd的六角相液晶模板合成及对乙醇的电催化氧化*[J]. 材料研究学报, 2014, 28(6): 413-419.
Yanli WANG, Dexin TAN, Sen CHEN, Ling BIAN. Synthesis of Nano-Pd Particles in a Quaternary System with a Hexagonal Liquid Crystal as Template and Their Electrocatalytic Activity for Oxidation of Ethanol[J]. Chinese Journal of Materials Research, 2014, 28(6): 413-419.

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摘要:

构建盐水、环己烷、表面活性剂和助表面活性剂四元体系, 采用六角相液晶为模板在避光温和条件下将Pd²⁺还原制备出纳米Pd催化剂, 用偏光显微分析、XRD、TEM、选区电子衍射 (SAED)和HRTEM等手段对其进行表征, 研究了反应时间对纳米Pd微观形貌和尺寸的影响, 并用循环伏安法研究了纳米Pd修饰玻碳电极对乙醇的电催化活性。结果表明, 避光反应24 h后制备出呈规则形貌的纳米Pd材料, 平均粒径为(31±1) nm, 对乙醇有较高的电催化活性和抗中毒能力。

关键词 ：金属材料, 六角相, 钯, 乙醇, 电催化

Abstract：

Nano-Pd catalyst have been synthesized by slow reduction of Pd²⁺ in a quaternary system of brine-cyclohexane-surfactant-cosurfactant with a hexagonal lyotropic liquid crystal as template in a dark place under soft condition. Then the synthesized Pd nano-particles were characterized by optical microscopy、XRD、TEM、and HRTEM with selected area electron diffraction (SAED). The electrocatalytic properties of the nano-Pd modified glassy carbon electrode (Pd/GCE) for ethanol oxidation had been also investigated by cyclic voltammetry. The results show that the synthesized nano-Pd particles after reaction for 24 h show more or less the same shape with regular morphology with a mean size of (31±1) nm. This material exhibits the excellent electrocatalytic activity and anti-poisoning ability for the ethanol oxidation.

Key words： metallic materials hexagonal mesophases palladium ethanol electrocatalysis

收稿日期: 2013-11-19

基金资助:* 国家自然科学基金51303005, 安徽省教育厅重点基金KJ2013A087、KJ2013A095和安徽理工大学博士启动基金资助项目。

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https://www.cjmr.org/CN/10.11901/1005.3093.2013.869 或 https://www.cjmr.org/CN/Y2014/V28/I6/413

图1 SDS/盐水/正戊醇/环己烷体系拟三元相图

图2 A1、A2、A3、A4和A5等五个样品的偏光纹理照片

图3 样品的小角XRD谱

图4 纳米Pd的XRD图

图5 纳米Pd颗粒在不同放大倍数的TEM和HRTEM照片(ED插图)

图6 不同反应时间时纳米Pd的TEM像

图7 乙醇在不同电极上的电催化氧化循环伏安曲线

表1 不同电极上循环伏安测试数据

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