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Electro-oxidation and reduction of H2 on platinum studied by scanning electrochemical microscopy for the purpose of local detection of H2 evolution

Journal Article


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Abstract


  • Electrochemical detection of H-2 using scanning electrochemical microscopy (SECM) has shown to hold great promise as a sensitive characterization method with high spatial resolution for active surfaces generating H-2. Herein, the factors contributing to the current that is measured by SECM in generation/collection mode for H-2 detection are studied. In particular, the concentration gradient of H-2 at the substrate, the H-2/H+ recycling between the SECM tip and substrate and hemispherical profile of H-2 diffusion has been discussed. It was postulated that H-2/H+ recycling plays a dominant role in the oxidative current measured in generation/collection mode of SECM when the microelectrode is positioned in close vicinity of substrate. Copyright (C) 2015 John Wiley & Sons, Ltd.

Publication Date


  • 2015

Citation


  • Jamali, S. S., Moulton, S. E., Tallman, D. E., Weber, J. & Wallace, G. G. (2015). Electro-oxidation and reduction of H2 on platinum studied by scanning electrochemical microscopy for the purpose of local detection of H2 evolution. Surface and Interface Analysis, 47 (13), 1187-1191.

Scopus Eid


  • 2-s2.0-84978891306

Ro Full-text Url


  • http://ro.uow.edu.au/context/aiimpapers/article/2739/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1737

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 1187

End Page


  • 1191

Volume


  • 47

Issue


  • 13

Place Of Publication


  • United Kingdom

Abstract


  • Electrochemical detection of H-2 using scanning electrochemical microscopy (SECM) has shown to hold great promise as a sensitive characterization method with high spatial resolution for active surfaces generating H-2. Herein, the factors contributing to the current that is measured by SECM in generation/collection mode for H-2 detection are studied. In particular, the concentration gradient of H-2 at the substrate, the H-2/H+ recycling between the SECM tip and substrate and hemispherical profile of H-2 diffusion has been discussed. It was postulated that H-2/H+ recycling plays a dominant role in the oxidative current measured in generation/collection mode of SECM when the microelectrode is positioned in close vicinity of substrate. Copyright (C) 2015 John Wiley & Sons, Ltd.

Publication Date


  • 2015

Citation


  • Jamali, S. S., Moulton, S. E., Tallman, D. E., Weber, J. & Wallace, G. G. (2015). Electro-oxidation and reduction of H2 on platinum studied by scanning electrochemical microscopy for the purpose of local detection of H2 evolution. Surface and Interface Analysis, 47 (13), 1187-1191.

Scopus Eid


  • 2-s2.0-84978891306

Ro Full-text Url


  • http://ro.uow.edu.au/context/aiimpapers/article/2739/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1737

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 1187

End Page


  • 1191

Volume


  • 47

Issue


  • 13

Place Of Publication


  • United Kingdom