• 中文
    • English
  • English 
    • 中文
    • English
  • Login
View Item 
  •   DSpace Home
  • 化学化工学院
  • 化学化工-已发表论文
  • View Item
  •   DSpace Home
  • 化学化工学院
  • 化学化工-已发表论文
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Studies of Oxidation Processes of Methanol on Hollow CoPt Nanospheres and In situ Electrochemical Fourier Transform Infrared Spectroscopy

Thumbnail
Full Text
Studies of Oxidation Processes of Methanol on Hollow CoPt Nanospheres and In situ Electrochemical Fourier Transform Infrared Spectroscopy.htm (402bytes)
Date
2012-09
Author
Zhou Xin-Wen
Gan Ya-Li
Sun Shi-Gang
孙世刚
Collections
  • 化学化工-已发表论文 [14469]
Show full item record
Abstract
Hollow CoPt nanospheres were synthesized by chemical reduction and galvanic displacement reactions. The catalyst showed good electrocatalytic activity for methanol oxidation. The results of transmission electron microscopy (TEM), energy dispersive spectromenter (EDS), and electrochemical cyclic voltammograms indicated that, in the process of electrochemical experiments carried in 0.1 mol . L-1 H2SO4 and 0.1 mol . L-1 CH3OH, hollow CoPt nanospheres were dealloying, which induced the dissolution of elemental Co from the surface of the catalyst. After the dealloying process, more Pt active sites were exposed on the surface of the catalyst and the catalyst showed better catalytic activity, as well as enhanced structural stability. The electrooxidation of methanol on the hollow CoPt nanospheres was studied on the molecular level using in situ electrochemical Fourier transform infrared (FTIR) spectroscopy. The toxic intermediate CO observed on the CoPt nanorods displayed abnormal infrared effects (AIREs). The FTIR results were similar to those obtained in an earlier experiment on the hollow CoPt nanospheres using CO as a probe molecule. All the results suggested that the dealloying method would be a useful technique for regulating the composition and performance of the catalyst. In situ electrochemical FTIR was highlighted as a potential method for studying the oxidation processes of organic molecules. It is envisaged that these methods will be widely used in the field of fuel cell research.
Citation
ACTA PHYSICO-CHIMICA SINICA,2012,18(9):2071-2076
URI
http://dx.doi.org/10.3866/PKU.WHXB201205031
WOS:000308627200009
https://dspace.xmu.edu.cn/handle/2288/14715

copyright © 2002-2016  Duraspace  Theme by @mire  厦门大学图书馆  
About | Policies
 

 

Browse

All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

LoginRegister

copyright © 2002-2016  Duraspace  Theme by @mire  厦门大学图书馆  
About | Policies