- Title
- Correlation between film structures and potential limits for hydrogen and oxygen evolutions at a-C:N film electrochemical electrodes
- Creator
- Zeng, Aiping; Bilek, Marcela M. M.; McKenzie, David R.; Lay, Peter A.; La Fontaine, Alexandre; Keast, Vicki J.
- Relation
- Carbon Vol. 46, Issue 4, p. 663-670
- Publisher Link
- http://dx.doi.org/10.1016/j.carbon.2008.01.022
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2008
- 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.
- Subject
- doped diamond electrodes; amorphous carbon films; surface chemistry; behaviour; oxides; acid; spectroscopy; termination; reduction; resonance
- Identifier
- http://hdl.handle.net/1959.13/42891
- Identifier
- uon:5031
- Identifier
- ISSN:0008-6223
- Language
- eng
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