Pt nanoparticle modified single walled carbon nanotube network electrodes for electrocatalysis: Control of the specific surface area over three orders of magnitude

Thomas S. Miller, Siriwat Sansuk, Pei San (Sharel) E, Stanley C. S. Lai, Julie V. Macpherson, Patrick R. Unwin

    Research output: Contribution to journalArticle

    Abstract

    The electrodeposition of Pt nanoparticles (NPs) on two-dimensional single walled carbon nanotube (SWNT) network electrodes is investigated as a means of tailoring electrode surfaces with a well-defined amount of electrocatalytic material. Both Pt NP deposition and electrocatalytic studies are undertaken using the microcapillary electrochemical method (MCEM), enabling multiple microscale measurements to be performed quickly and easily on the same SWNT sample. Using this approach, Pt catalysts with high specific surface areas relative to the geometric electrode area (defined by the meniscus contact of the MCEM probe with the Si/SiO2 substrate bearing the SWNT network) can be controlled precisely over three orders of magnitude. This enables the influence of the specific surface area of an electrocatalyst on activity to be investigated, as demonstrated by studies of the oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR).
    Original languageEnglish
    Pages (from-to)136–145
    Number of pages10
    JournalCatalysis Today
    Volume244
    DOIs
    Publication statusPublished - 25 Jul 2014

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