Insights into the electro-oxidation of ethylene glycol at Pt/Ru nanocatalysts supported on MWCNTs: Adsorption-controlled electrode kinetics

被引：28
|
作者：
Maxakato, Nobanathi W. [1 ,2 ]
Arendse, Christopher J. [1 ,3 ]
Ozoemena, Kenneth I. [1 ]
机构：
[1] Univ Pretoria, Dept Chem, Mol & Nanomat Electrochem Lab, ZA-0002 Pretoria, South Africa
[2] CSIR, Natl Ctr Nanostruct Mat, ZA-0001 Pretoria, South Africa
[3] Univ Western Cape, Dept Phys, ZA-7535 Bellville, South Africa
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2009年 / 11卷 / 03期
关键词：
Pt/Ru nanoparticles; Ethylene glycol oxidation; Cyclic voltammetry; Impedance spectroscopy; Adsorption-controlled kinetics; ELECTROCHEMICAL OXIDATION; METHANOL; PRODUCTS;
D O I：
10.1016/j.elecom.2008.12.038
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Electrocatalytic properties of Pt/Ru nanoparticle-electrodecorated MWCNT platform towards the oxidation of ethylene glycol (EG) have been interrogated using cyclic voltammetry and electrochemical impedance spectroscopy. Both forward and reverse oxidative reactions exhibited distinct electrochemical behaviour following changes in EG concentrations, scan rates and during repetitive cyclic voltammetric scanning. Our results suggest that the overall electro-oxidation reaction of EG is governed mainly by adsorption kinetics, with the electrochemical adsorption equilibrium constant (beta) and the free energy change (Delta G(o)) being 1.47 M-1 and -0.95 kJ mol(-1), respectively. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：534 / 537
页数：4
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