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
相关论文
共 50 条
  • [1] The impact of the alkali cation on the mechanism of the electro-oxidation of ethylene glycol on Pt
    Sitta, Elton
    Batista, Bruno C.
    Varela, Hamilton
    [J]. CHEMICAL COMMUNICATIONS, 2011, 47 (13) : 3775 - 3777
  • [2] ELECTRO-OXIDATION OF ETHYLENE-GLYCOL ON RU MODIFIED BY COPPER-DEPOSITS
    URETAZANARTU, S
    PINTO, ME
    ZAGAL, J
    [J]. BOLETIN DE LA SOCIEDAD CHILENA DE QUIMICA, 1988, 33 (02): : 83 - 87
  • [3] Nanostructured Pt and Pt-Sn catalysts supported on oxidized carbon nanotubes for ethanol and ethylene glycol electro-oxidation
    Sieben, J. M.
    Duarte, M. M. E.
    [J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2011, 36 (05) : 3313 - 3321
  • [4] Ethanol electro-oxidation with Pt and Pt-Ru catalysts supported on carbon nanotubes
    Wang, MY
    Chen, JH
    Fan, Z
    Tang, H
    Deng, GH
    He, DL
    Kuang, YF
    [J]. CARBON, 2004, 42 (15) : 3257 - 3260
  • [5] Methanol, ethanol and ethylene glycol electro-oxidation at Pt and Pt-Ru catalysts electrodeposited over oxidized carbon nanotubes
    Sieben, J. M.
    Duarte, M. M. E.
    [J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2012, 37 (13) : 9941 - 9947
  • [6] Kinetics of dissociative adsorption of ethylene glycol on Pt(111) electrode
    Fan, YJ
    Fan, CH
    Zhen, CH
    Chen, SP
    Sun, SG
    [J]. ACTA PHYSICO-CHIMICA SINICA, 2004, 20 (04) : 382 - 385
  • [7] The promoting effect of Pb on carbon supported Pt and Pt/Ru catalysts for electro-oxidation of ethanol
    Li, Guangchun
    Pickup, Peter G.
    [J]. ELECTROCHIMICA ACTA, 2006, 52 (03) : 1033 - 1037
  • [8] Electro-oxidation of ethanol and ethylene glycol on carbon-supported nano-Pt and -PtRu catalyst in acid solution
    Chatterjee, Moitrayee
    Chatterjee, Abhik
    Ghosh, Susanta
    Basumallick, I.
    [J]. ELECTROCHIMICA ACTA, 2009, 54 (28) : 7299 - 7304
  • [9] Promising ethylene glycol electro-oxidation at tailor-designed NiOx/Pt nanocatalyst
    El-Nowihy, Ghada H.
    Mohammad, Ahmad M.
    Khalil, Mostafa M. H.
    Sadek, Mohamed A.
    El-Deab, Mohamed S.
    [J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2017, 42 (08) : 5095 - 5104
  • [10] Methanol Electro-Oxidation on Pt-Ru Alloy Nanoparticles Supported on Carbon Nanotubes
    Li, Liang
    Xing, Yangchuan
    [J]. ENERGIES, 2009, 2 (03) : 789 - 804
12345