...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Electrocatalysis >Spontaneous Deposition of Ag. Influence of Composition of Ag-Containing Solution on the Electrocatalytic Activity of Pt-Modified Surface
【24h】

Spontaneous Deposition of Ag. Influence of Composition of Ag-Containing Solution on the Electrocatalytic Activity of Pt-Modified Surface

机译：Ag的自发沉积。含银溶液组成对Pt修饰表面电催化活性的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Using spontaneous and electrochemical deposition of Ag, Ag-covered Pt polycrystalline electrodes were prepared. The behavior of these Pt-based composite catalysts depends on their morphology, the crystalline and electronic properties, and in a minor extent, the solution composition containing Ag ion. This work deals with the study of methanol and carbon monoxide electrooxidation using Pt surfaces modified by Ag through spontaneous deposition. The main objective is to investigate the influence of the counterion nature of Ag-containing electrolytic solutions. For this purpose, the electrooxidation of methanol adsorbed residues and also of carbon monoxide was studied applying conventional electrochemical methods in aqueous 1 M H2SO4. Those reactions exhibit different behavior which is highly dependent on the nature of the Ag-containing electrolytic solution used to carry out the deposition process. The results demonstrate that in the adsorption process of both methanol residues and carbon monoxide, the interaction with Pt surface is achieved through electrodeposited Ag, but the counterion plays a significant role. A theoretical model is proposed in which it is considered the coadsorption of the counterion with water molecules preadsorbed on Pt surface and the interaction of the anions with residues adsorbed from carbon monoxide and methanol.
机译：利用Ag的自发和电化学沉积，制备了覆盖Ag的Pt多晶电极。这些基于Pt的复合催化剂的行为取决于它们的形态，结晶和电子性质，并且在较小程度上取决于包含Ag离子的溶液组成。这项工作涉及使用由Ag通过自发沉积修饰的Pt表面对甲醇和一氧化碳进行电氧化的研究。主要目的是研究含银电解液抗衡离子性质的影响。为此，采用常规电化学方法在1 M H2 SO4 水溶液中研究了甲醇吸附的残留物以及一氧化碳的电氧化。这些反应表现出不同的行为，这很大程度上取决于用于进行沉积过程的含银电解液的性质。结果表明，在甲醇残渣和一氧化碳的吸附过程中，通过电沉积Ag可实现与Pt表面的相互作用，而抗衡离子起着重要的作用。提出了一种理论模型，其中考虑了抗衡离子与预吸附在Pt表面的水分子的共吸附以及阴离子与一氧化碳和甲醇吸附的残留物的相互作用。

著录项

  • 来源
    《Electrocatalysis》 |2011年第3期|p.172-180|共9页
  • 作者

    Silvana A. Martínez; María Elisa Martins; Carlos Fernando Zinola;

  • 作者单位

    Núcleo Interdisciplinario de Ingeniería Electroquímica, UDELAR, J. E. Rodó N° 1843, Montevideo, Uruguay;

    Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, Facultad de Ciencias Exactas, UNLP, CCT La Plata-CONICET, C.C. 16, Suc. 4 (1900), La Plata, Argentina;

    Núcleo Interdisciplinario de Ingeniería Electroquímica, UDELAR, J. E. Rodó N° 1843, Montevideo, Uruguay;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Spontaneous deposition; Silver; Methanol; Carbon monoxide;

    机译：自发沉积;银;甲醇;一氧化碳;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号