25-27 November 2015
National Centre for Synchrotron Science
Australia/Melbourne timezone

Growth of catalytic Au nanoparticles upon electrochemical ageing

26 Nov 2015, 13:30
Exhibition space (National Centre for Synchrotron Science)

Exhibition space

National Centre for Synchrotron Science

Australian Synchrotron 800 Blackburn Road Clayton VIC 3168
Board: EM-15
Poster Energy Materials Poster Session 1


Bernt Johannessen (Australian Synchrotron)


Au nanoparticles, potential catalysts in fuel cells, were produced following a published chemical method. As-made nanoparticles were then adsorbed to carbon black supports and an electrochemical ageing sequence was applied. Of interest to this study was to observe and quantify the long term stability of Au nanoparticles upon ageing and as a function of nanoparticle size. To this end X-ray absorption spectroscopy and complementary methods were applied. Interestingly, it was found that small (2.4 and 3.1 nm diameter) nanoparticles grew in size as a result of the ageing process, whilst larger (4.6 nm) nanoparticles did not grow appreciably. Our results have implication on the suitability of Au nanoparticles as commercially viable catalytic material.
Keywords nanoparticles, catalysis, electrochemistry

Primary author

Mr Jared Steven (University of Canterbury)


Dr Aaron Marshall (University of Canterbury) Bernt Johannessen (Australian Synchrotron) Dr Vladimir Golovko (University of Canterbury)

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