淡江大學機構典藏:Item 987654321/71892
English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 62797/95867 (66%)
造訪人次 : 3733018      線上人數 : 381
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/71892


    題名: Electrocatalytic Activity of Pd−Co Bimetallic Mixtures for Formic Acid Oxidation Studied by Scanning Electrochemical Microscopy
    作者: Jung, Changhoon;Sánchez-Sánchez, Carlos M.;Lin, Cheng-Lan;Rodríguez-López, Joaquín;Bard, Allen J.
    貢獻者: 淡江大學化學工程與材料工程學系
    日期: 2009-07
    上傳時間: 2013-05-31 11:39:55 (UTC+8)
    出版者: Washington: American Chemical Society
    摘要: The electrochemical oxidation of formic acid was studied by the tip generation-substrate collection (TG-SC) mode of scanning electrochemical microscopy (SECM), extending the number of applications of SECM in electrocatalysis. Formic acid was generated at a Hg on Au ultramicroelectrode (UME) tip by reduction of CO2 in a 0.1 M KHCO3 solution saturated with this gas. The electrocatalytic activity of different Pd−Co bimetallic compositions was evaluated using a Pd−Co electrocatalyst array formed by spots deposited onto glassy carbon (GC) as a SECM substrate. The SECM tip, which generated a constant formic acid flux, was scanned above the array and the oxidation current generated when formic acid was collected by active electrocatalytic spots was displayed as a function of tip position. This generated a SECM image that showed the electrocatalytic activity of each spot. SECM screening identified Pd50Co50 (Pd/Co = 50:50, atomic ratio) as a better electrocatalyst toward the formic acid oxidation than pure Pd or Pt in 0.1 M KHCO3 solution and this result was confirmed by cyclic voltammetry. Positive feedback was observed for the most active compositions of Pd−Co which suggests fast reaction kinetics and chemical reversibility during the oxidation of formic acid to CO2. Moreover this feedback increases the contrast between active and non-active spots in this imaging mode.
    關聯: Analytical Chemistry 81(16), pp.7003-7008
    DOI: 10.1021/ac901096h
    顯示於類別:[化學工程與材料工程學系暨研究所] 期刊論文

    文件中的檔案:

    檔案 大小格式瀏覽次數
    index.html0KbHTML262檢視/開啟

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋