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电化学（中英文） ›› 2014, Vol. 20 ›› Issue (5): 416-425.  doi: 10.13208/j.electrochem.131174

• 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

阵列纳米管中铂:钌原子比对甲醇电催化氧化活性的影响（英文）

袁金华, 王凤彬, 夏兴华*   

  1. 生命分析化学国家重点实验室，南京大学化学化工学院，南京210093
  • 收稿日期:2014-02-13 修回日期:2014-05-14 出版日期:2014-10-28 发布日期:2014-05-19
  • 通讯作者: 夏兴华 E-mail:xhxia@nju.edu.cn
  • 基金资助:

    This work was financially supported by the National 973 Basic Research Program (2012CB933800), the National Natural Science Foundation of China (21035002, 21275070, 21205059), the National Science Fund for Creative Research Groups (21121091), Nanjing Medical Science and technique Development Foundation(QRX11129)

Influence of Pt:Ru Ratio in Nanotubes Array Structures on the Electrocatalytic Activity of Methanol Oxidation

YUAN Jin-Hua, WANG Feng-Bin, XIA Xing-Hua*   

  1. State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
  • Received:2014-02-13 Revised:2014-05-14 Published:2014-10-28 Online:2014-05-19
  • Contact: XIA Xing-Hua E-mail:xhxia@nju.edu.cn
  • Supported by:

    This work was financially supported by the National 973 Basic Research Program (2012CB933800), the National Natural Science Foundation of China (21035002, 21275070, 21205059), the National Science Fund for Creative Research Groups (21121091), Nanjing Medical Science and technique Development Foundation(QRX11129)

PDF (PC)

814

摘要： 采用电化学沉积技术在3-氨丙基三甲基硅氧烷修饰的多孔氧化铝膜板中制备了具有不同Pt/Ru原子比的双元Pt/Ru阵列纳米管电极（NTAEs）。分别用X-射线衍射和扫描电镜表征了催化剂结构和形态。电化学结果表明：通过控制前驱沉积液的浓度可得到不同PtRu原子比的NTAEs。所制备的Pt 或 Pt/Ru合金阵列纳米电极的真实表面积大，催化活性强，有利于物质传输，对甲醇电氧化显示出显著的催化性能。实验中还系统研究了催化剂组成与CO和CH3OH电催化氧化性能的关系，发现Pt/Ru=50:50的阵列纳米管电极对CO电氧化显示出最好的催化活性；对甲醇电氧化，则Ru原子比为40%的催化剂显示最佳催化性能。

关键词: 催化剂, 铂钌合金, 纳米管, 甲醇, 一氧化碳

Abstract: Bimetallic PtRu nanotubes array electrodes (NTAEs) with varied Pt to Ru atomic ratios have been prepared by electrochemical codeposition in 3-aminopropyltri-methoxysilane modified porous anodic alumina (PAA) membranes. The structure and morphology of the catalysts were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. Electrochemical results showed that the NTAEs with varied atomic ratios could be achieved by controlling the precursor concentration for deposition. The prepared nanoarrays composed of Pt or PtRu alloy promoted the mass-normalized activity toward the sluggish electrooxidation reaction of methanol due to the increased catalytic activity and real surface area, as well as the improved mass transport through the catalysts. Correlations between the anode composition and the electrocatalytic activity of the catalysts toward the electrooxidations of CO and CH3OH were systemically investigated. The PtRu NTAEs containing ca. 50% Ru showed the highest activity for CO electrooxidation, while the PtRu NATEs of 40% Ru for CH3OH electrooxidation.

Key words: electrocatalysts, PtRu, Nanotubes, Methanol, CO

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