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EPR characterisation of platinum nanoparticle functionalised carbon

Journal Article


Abstract


  • The use of nanostructured carbon materials as electrodes for energy storage and conversion is an

    expanding area of research in recent years. Herein, platinum nanoparticles have been deposited

    onto both multi-walled and single-walled carbon nanotubes via a microwave assisted polyol

    reduction method. This interaction has been probed with electron paramagnetic resonance (EPR)

    and Raman spectroscopies to elucidate the charge/electron transfer interactions between the Pt

    nanoparticles and the CNTs. Observed shifts in the g factors of the CNTs are indicative of such

    an electronic interaction, strongly suggesting the covalent attachment of the nanoparticles with

    the carboxylic groups on the CNTs, formed during the microwave-assisted reduction process. The

    Pt decorated CNTs show a dramatic increase in electrochemical behaviour in terms of high

    reversible capacity and relatively stable cycle performance compared to unmodified CNTs

    increasing their applicability in energy storage devices. For instance, significant increases in the

    electrochemical double layer capacitance are observed for the CNT–NP composite electrode

    (80% for SWNTs and 50% for MWNT).

Publication Date


  • 2010

Citation


  • Dennany, L., Sherrell, P., Chen, J., Innis, P. C., Wallace, G. G. & Minett, A. I. (2010). EPR characterisation of platinum nanoparticle functionalised carbon. Physical Chemistry Chemical Physics, 12 (16), 4135-4141.

Scopus Eid


  • 2-s2.0-77950796568

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 4135

End Page


  • 4141

Volume


  • 12

Issue


  • 16

Abstract


  • The use of nanostructured carbon materials as electrodes for energy storage and conversion is an

    expanding area of research in recent years. Herein, platinum nanoparticles have been deposited

    onto both multi-walled and single-walled carbon nanotubes via a microwave assisted polyol

    reduction method. This interaction has been probed with electron paramagnetic resonance (EPR)

    and Raman spectroscopies to elucidate the charge/electron transfer interactions between the Pt

    nanoparticles and the CNTs. Observed shifts in the g factors of the CNTs are indicative of such

    an electronic interaction, strongly suggesting the covalent attachment of the nanoparticles with

    the carboxylic groups on the CNTs, formed during the microwave-assisted reduction process. The

    Pt decorated CNTs show a dramatic increase in electrochemical behaviour in terms of high

    reversible capacity and relatively stable cycle performance compared to unmodified CNTs

    increasing their applicability in energy storage devices. For instance, significant increases in the

    electrochemical double layer capacitance are observed for the CNT–NP composite electrode

    (80% for SWNTs and 50% for MWNT).

Publication Date


  • 2010

Citation


  • Dennany, L., Sherrell, P., Chen, J., Innis, P. C., Wallace, G. G. & Minett, A. I. (2010). EPR characterisation of platinum nanoparticle functionalised carbon. Physical Chemistry Chemical Physics, 12 (16), 4135-4141.

Scopus Eid


  • 2-s2.0-77950796568

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 4135

End Page


  • 4141

Volume


  • 12

Issue


  • 16