Dynamics of electrocatalytic oxidation of ethylene glycol, methanol and formic acid at MWCNT platform electrochemically modified with Pt/Ru nanoparticles

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

doi:10.1002/elan.200900397

Dynamics of electrocatalytic oxidation of ethylene glycol, methanol and formic acid at MWCNT platform electrochemically modified with Pt/Ru nanoparticles

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

Chemical Sciences

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

28 Citations (Scopus)

Abstract

Comparative electrocatalytic behavior of functionalized multiwalled carbon nanotubes (fMWCNTs) electrodecorated with Pt/Ru nanoparticles towards the oxidation of methanol (MeOH), ethylene glycol (EG) and formic acid (FA) has been investigated. The catalytic current density decreased approximately as MeOH≈EG gt; FA. Result revealed that BPPGE-fMWCNT-Pt/Ru tolerates CO poisoning for FA electrooxidation than when used for the oxidation of the EG or MeOH. Electrochemical impedance spectra are dependent on the oxidation potentials, with equivalent circuit models characteristic of adsorption-controlled charge transfer kinetics. The results provide important insights into the electrochemical response of these small organic molecules useful in fuel cell technology.

Original language	English
Pages (from-to)	519-529
Number of pages	11
Journal	Electroanalysis
Volume	22
Issue number	5
DOIs	https://doi.org/10.1002/elan.200900397
Publication status	Published - Mar 2010

Keywords

Adsorption-controlled kinetics
Cyclic voltammetry
Electrocatalytic oxidation
Impedance spectroscopy
MWCNT-Pt/Ru nanoparticles
Nanoparticles
Small organic molecules

ASJC Scopus subject areas

Analytical Chemistry
Electrochemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/elan.200900397

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title = "Dynamics of electrocatalytic oxidation of ethylene glycol, methanol and formic acid at MWCNT platform electrochemically modified with Pt/Ru nanoparticles",

abstract = "Comparative electrocatalytic behavior of functionalized multiwalled carbon nanotubes (fMWCNTs) electrodecorated with Pt/Ru nanoparticles towards the oxidation of methanol (MeOH), ethylene glycol (EG) and formic acid (FA) has been investigated. The catalytic current density decreased approximately as MeOH≈EG gt; FA. Result revealed that BPPGE-fMWCNT-Pt/Ru tolerates CO poisoning for FA electrooxidation than when used for the oxidation of the EG or MeOH. Electrochemical impedance spectra are dependent on the oxidation potentials, with equivalent circuit models characteristic of adsorption-controlled charge transfer kinetics. The results provide important insights into the electrochemical response of these small organic molecules useful in fuel cell technology.",

keywords = "Adsorption-controlled kinetics, Cyclic voltammetry, Electrocatalytic oxidation, Impedance spectroscopy, MWCNT-Pt/Ru nanoparticles, Nanoparticles, Small organic molecules",

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

year = "2010",

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doi = "10.1002/elan.200900397",

language = "English",

volume = "22",

pages = "519--529",

journal = "Electroanalysis",

issn = "1040-0397",

publisher = "Wiley-VCH Verlag",

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T1 - Dynamics of electrocatalytic oxidation of ethylene glycol, methanol and formic acid at MWCNT platform electrochemically modified with Pt/Ru nanoparticles

AU - Maxakato, Nobanathi W.

AU - Ozoemena, Kenneth I.

AU - Arendse, Christopher J.

PY - 2010/3

Y1 - 2010/3

N2 - Comparative electrocatalytic behavior of functionalized multiwalled carbon nanotubes (fMWCNTs) electrodecorated with Pt/Ru nanoparticles towards the oxidation of methanol (MeOH), ethylene glycol (EG) and formic acid (FA) has been investigated. The catalytic current density decreased approximately as MeOH≈EG gt; FA. Result revealed that BPPGE-fMWCNT-Pt/Ru tolerates CO poisoning for FA electrooxidation than when used for the oxidation of the EG or MeOH. Electrochemical impedance spectra are dependent on the oxidation potentials, with equivalent circuit models characteristic of adsorption-controlled charge transfer kinetics. The results provide important insights into the electrochemical response of these small organic molecules useful in fuel cell technology.

AB - Comparative electrocatalytic behavior of functionalized multiwalled carbon nanotubes (fMWCNTs) electrodecorated with Pt/Ru nanoparticles towards the oxidation of methanol (MeOH), ethylene glycol (EG) and formic acid (FA) has been investigated. The catalytic current density decreased approximately as MeOH≈EG gt; FA. Result revealed that BPPGE-fMWCNT-Pt/Ru tolerates CO poisoning for FA electrooxidation than when used for the oxidation of the EG or MeOH. Electrochemical impedance spectra are dependent on the oxidation potentials, with equivalent circuit models characteristic of adsorption-controlled charge transfer kinetics. The results provide important insights into the electrochemical response of these small organic molecules useful in fuel cell technology.

KW - Adsorption-controlled kinetics

KW - Cyclic voltammetry

KW - Electrocatalytic oxidation

KW - Impedance spectroscopy

KW - MWCNT-Pt/Ru nanoparticles

KW - Nanoparticles

KW - Small organic molecules

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DO - 10.1002/elan.200900397

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VL - 22

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JO - Electroanalysis

JF - Electroanalysis

IS - 5

ER -

Dynamics of electrocatalytic oxidation of ethylene glycol, methanol and formic acid at MWCNT platform electrochemically modified with Pt/Ru nanoparticles

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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