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

Nobanathi W. Maxakato; Christopher J. Arendse; Kenneth I. Ozoemena

doi:10.1016/j.elecom.2008.12.038

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

Nobanathi W. Maxakato, Christopher J. Arendse, Kenneth I. Ozoemena

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

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 (β) and the free energy change (ΔG^o) being 1.47 M^-1 and -0.95 kJ mol^-1, respectively.

Original language	English
Pages (from-to)	534-537
Number of pages	4
Journal	Electrochemistry Communications
Volume	11
Issue number	3
DOIs	https://doi.org/10.1016/j.elecom.2008.12.038
Publication status	Published - Mar 2009
Externally published	Yes

Keywords

Adsorption-controlled kinetics
Cyclic voltammetry
Ethylene glycol oxidation
Impedance spectroscopy
Pt/Ru nanoparticles

ASJC Scopus subject areas

Electrochemistry

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10.1016/j.elecom.2008.12.038

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

abstract = "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 (β) and the free energy change (ΔGo) being 1.47 M-1 and -0.95 kJ mol-1, respectively.",

keywords = "Adsorption-controlled kinetics, Cyclic voltammetry, Ethylene glycol oxidation, Impedance spectroscopy, Pt/Ru nanoparticles",

author = "Maxakato, {Nobanathi W.} and Arendse, {Christopher J.} and Ozoemena, {Kenneth I.}",

year = "2009",

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T1 - Insights into the electro-oxidation of ethylene glycol at Pt/Ru nanocatalysts supported on MWCNTs

T2 - Adsorption-controlled electrode kinetics

AU - Maxakato, Nobanathi W.

AU - Arendse, Christopher J.

AU - Ozoemena, Kenneth I.

PY - 2009/3

Y1 - 2009/3

N2 - 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 (β) and the free energy change (ΔGo) being 1.47 M-1 and -0.95 kJ mol-1, respectively.

AB - 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 (β) and the free energy change (ΔGo) being 1.47 M-1 and -0.95 kJ mol-1, respectively.

KW - Adsorption-controlled kinetics

KW - Cyclic voltammetry

KW - Ethylene glycol oxidation

KW - Impedance spectroscopy

KW - Pt/Ru nanoparticles

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DO - 10.1016/j.elecom.2008.12.038

M3 - Article

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SN - 1388-2481

VL - 11

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JO - Electrochemistry Communications

JF - Electrochemistry Communications

IS - 3

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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