کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1529140 | 995739 | 2012 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Cyclic voltammetry response of an undoped CVD diamond electrodes Cyclic voltammetry response of an undoped CVD diamond electrodes](/preview/png/1529140.png)
The polycrystalline undoped diamond layers were deposited on tungsten wire substrates by using hot filament chemical vapor deposition (HFCVD) technique. As a working gas the mixture of methanol in excess of hydrogen was used. The morphologies and quality of as-deposited films were monitored by means of scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy respectively. The electrochemical activity of the obtained diamond layers was monitored by using cyclic voltammetry measurements. Analysis of the ferrocyanide–ferricyanide couple at undoped diamond electrode suggests that electrochemical reaction at diamond electrode has a quasireversibile character. The ratio of the anodic and cathodic peak currents was always close to unity. In this work we showed that the amorphous carbon admixture in the CVD diamond layer has a crucial influence on its electrochemical performance.
► Correlation was found between diamond quality and its electrochemical performance.
► The electrode sensitivity depends on the content of sp2 carbon phase in diamond layer.
► The sp2 carbon phase content has little influence on the CV peak separation (ΔEp).
Journal: Materials Science and Engineering: B - Volume 177, Issue 15, 1 September 2012, Pages 1243–1247