Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/42891

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Title
Correlation between film structures and potential limits for hydrogen and oxygen evolutions at a-C:N film electrochemical electrodes
Author/Creator
Zeng, Aiping;  Bilek, Marcela M. M.;  McKenzie, David R.;  Lay, Peter A.;  La Fontaine, Alexandre;  Keast, Vicki J.
Institution
The University of Newcastle. Faculty of Science & Information Technology, School of Mathematical and Physical Sciences
Description
A correlation between film structures and the width of the potential windows defined by the dihydrogen and dioxygen evolutions in aqueous media at nitrogen-doped amorphous carbon thin film electrodes prepared using a filtered cathodic vacuum arc system is reported. A range of film structures were obtained by changing the nitrogen mass flow rate during deposition, and the film structures were determined using electron energy-loss spectroscopy. For the film electrodes, the width of the potential windows in 0.1 M NaOH and in 0.1 M H₂SO₄ at a current density of 100 μA/cm² exceed those for glassy carbon electrodes, and increase with an increase in the sp³C fraction in the a-C:N materials. A film electrode with a rich sp²C content, has a lower electrical resistance, but still possesses a relatively large potential window. These features combined allow the materials to be tailored for particular electroanalysis.
Relation
Carbon Vol. 46, Issue 4, p. 663-670
Publisher Link
http://dx.doi.org/10.1016/j.carbon.2008.01.022
Date
2008
Publisher
Elsevier
Keyword(s)
doped diamond electrodes;  amorphous carbon films;  surface chemistry;  behaviour;  oxides;  acid;  spectroscopy;  termination;  reduction;  resonance
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/42891
Identifier
ISSN:0008-6223
Reviewed
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Subject
"Carbon"
 
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