电化学制备二维“花状”Pt纳米结构及其对甲醇的电催化氧化

doi:10.13208/j.electrochem.131166

电化学（中英文） ›› 2014, Vol. 20 ›› Issue (4): 365-369. doi: 10.13208/j.electrochem.131166

• 电化学近期研究专辑（厦门大学姜艳霞教授主编） • 上一篇下一篇

电化学制备二维“花状”Pt纳米结构及其对甲醇的电催化氧化

王霞，胡俊，李永军^*

platinum; methanol; nanostructure; electrodeposition; electrocatalytic; oxidation

收稿日期:2013-12-30 修回日期:2014-03-16 出版日期:2014-08-28 发布日期:2014-03-22
通讯作者: 李永军 E-mail:liyongjunef@gmail.com
基金资助:
国家自然科学基金项目(No. 21170606)及湖南大学化学科学基地研究项目(No. J1210040，No. J1103312)资助

Electrochemical Fabrication of Two-Dimensional Flower-like Pt Nanostructures for Methanol Electrocatalytic Oxidation

WANG Xia, HU Jun, LI Yong-Jun^*

College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China

Received:2013-12-30 Revised:2014-03-16 Published:2014-08-28 Online:2014-03-22
Contact: LI Yong-Jun E-mail:liyongjunef@gmail.com

摘要/Abstract

摘要： 采用恒电流电化学技术在玻碳基底上制得二维“花状”Pt纳米结构（2D FPNs）样品，所用的电解液为HAuCl₄ + HClO₄溶液，无需添加任何表面结构诱导的有机试剂，Pt纳米结构表面更“洁净”，有较高的反应活性. 扫描电子显微镜测试显示，2D FPNs样品是由球状纳米花构成，纳米叶子是构筑纳米花的最小单元. 通过控制电沉积时间可调控球状Pt纳米花数的密度. 高倍透射电子显微镜测试表明每个叶状纳米片沿着Pt(111)晶面定向生长. 甲醇电催化氧化活性与电沉积时间有关. 2D FPNs电极的甲醇的电催化活性稍高于商业Pt/C电极，却有更好的抗毒化能力，这可能归因于其特定的暴露晶面及表面的“洁净性”.

关键词: 铂, 甲醇, 纳米结构, 电沉积, 电催化氧化

Abstract: Two-dimensional flower-like Pt nanostructures (2D FPNs) were fabricated on glassy carbon substrates by galvanostatical electrochemical technique. The electrolyte was the HAuCl₄ + HClO₄ aqueous solution without addition of any structure-directing organic reagent, which made as-prepared Pt nanostructures cleaner, exhibiting much higher reactivity. Scanning electron microscopic images revealed that 2D FPNs were spherical Pt nano-flowers constructed by the smallest building blocks, nano-leaves. The number density of spherical Pt nano-flowers can be tuned by controlling the electrodeposition time. High resolution transmission electron microscopic images indicated that each nano-leaf was formed by growing along Pt(111) direction. Electrocatalytic activities of as-prepared 2D FPNs were closely linked with the electrodeposition time. The electrocatalytic activity of 2D FPNs under the optimized electrodeposition time was slightly higher than that of the commercial Pt/C catalyst with much better tolerance to CO-like poisoning molecules. It may be attributed to the exposure of specified facets and the cleanness of surface.

Key words: platinum, methanol, nanostructure, electrodeposition, electrocatalytic, oxidation

中图分类号:

O646

王霞，胡俊，李永军*. 电化学制备二维“花状”Pt纳米结构及其对甲醇的电催化氧化[J]. 电化学（中英文）, 2014, 20(4): 365-369.

WANG Xia, HU Jun, LI Yong-Jun*. Electrochemical Fabrication of Two-Dimensional Flower-like Pt Nanostructures for Methanol Electrocatalytic Oxidation[J]. Journal of Electrochemistry, 2014, 20(4): 365-369.

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https://electrochem.xmu.edu.cn/CN/Y2014/V20/I4/365

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电化学制备二维“花状”Pt纳米结构及其对甲醇的电催化氧化

Electrochemical Fabrication of Two-Dimensional Flower-like Pt Nanostructures for Methanol Electrocatalytic Oxidation

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