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首页> 外文期刊>Materials Chemistry and Physics. >Preparation of Pt/multiwalled carbon nanotubes modified Au electrodes via Pt-Cu co-electrodeposition/Cu stripping protocol for high-performance electrocatalytic oxidation of methanol
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Preparation of Pt/multiwalled carbon nanotubes modified Au electrodes via Pt-Cu co-electrodeposition/Cu stripping protocol for high-performance electrocatalytic oxidation of methanol

机译：通过Pt-Cu共电沉积/ Cu汽提协议制备Pt /多壁碳纳米管修饰的Au电极，用于甲醇的高效电催化氧化

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摘要

Pt nanoparticles well dispersed on multiwalled carbon nanotubes (MWCNTs) were prepared for high-performance electrocatalytic oxidation of methanol in both acidic and alkaline media via the co-electrodeposition/stripping (CS) protocol, namely, co-electrodeposition of Pt and Cu followed by electrochemical stripping of Cu, as examined by cyclic voltammetry (CV), electrochemical quartz crystal microbalance (EQCM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The Pt catalyst prepared by the CS protocol on MWCNTs (Pt_(cs)/MWCNTs/Au) exhibited a specific electrocatalytic activity of 519 and 2210 A g~(-1) toward cyclic voltammetric electrooxidation (50 mV s~1) of methanol in 0.5 M CH_3OH + 0.5M H_2SO_4 and 0.5M CH_3OH + I.0M NaOH media, respectively, which are larger than those prepared by conventional electrodeposition from chloroplatinic acid on Au and MWCNTs/Au, as well as that by a CS protocol on Au. The Pt_(cs)/MWCNTs/Au electrode also possessed the highest stability, which maintained 91% and 90% of its initial catalytic activity after 120-cycle CV in 0.5 M CH_3OH + 0.5 M H_2SO_4 and 0.5 M CH_3OH + 1.0M NaOH, respectively. The electrode kinetics of methanol oxidation is also briefly discussed. The nanosubstrate-based CS protocol is simple, convenient and efficient, which is expected to find wide applications in film electrochemistry and electrocatalysis.
机译：制备了分散在多壁碳纳米管（MWCNTs）上的Pt纳米颗粒，用于通过共电沉积/剥离（CS）协议，即Pt和Cu的共电沉积，然后在酸性和碱性介质中对甲醇进行高效电催化氧化。循环伏安法（CV），电化学石英晶体微量天平（EQCM），扫描电子显微镜（SEM）和X射线衍射（XRD）检查了铜的电化学剥离。 CS协议在MWCNTs（Pt_（cs）/ MWCNTs / Au）上制备的Pt催化剂对甲醇在甲醇中的循环伏安电氧化（50 mV s〜1）表现出519和2210 A g〜（-1）的比电催化活性。分别使用0.5 M CH_3OH + 0.5M H_2SO_4和0.5M CH_3OH + 1.0M NaOH介质，它们比通过常规的电沉积方法在Au和MWCNTs / Au上由氯铂酸电沉积，以及在Au上通过CS协议制备的介质要大。 Pt_（cs）/ MWCNTs / Au电极也具有最高的稳定性，在0.5 M CH_3OH + 0.5 M H_2SO_4和0.5 M CH_3OH + 1.0M NaOH中进行120次循环CV后，其初始催化活性保持91％和90％，分别。还简要讨论了甲醇氧化的电极动力学。基于纳米底物的CS协议简单，方便，高效，有望在薄膜电化学和电催化中找到广泛的应用。

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  • 来源
    《Materials Chemistry and Physics.》 |2009年第3期|371-378|共8页
  • 作者

    Jinhua Huang; Qingji Xie; Yueming Tan; Yingchun Fu; Zhaohong Su; Yi Huang; Shouzhuo Yao;

  • 作者单位

    Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China;

    Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China;

    Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China;

    Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China;

    Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China;

    Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China;

    Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Pt catalysts; Pt-Cu co-electrodeposition/Cu stripping protocol; multiwalled carbon nanotubes; high-performance electrocatalytic oxidation of methanol;

    机译：铂催化剂;Pt-Cu共电沉积/ Cu剥离协议;多壁碳纳米管;甲醇的高效电催化氧化;

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