Electrochemical Quartz Crystal Impedance Study of Glucose Oxidation on a Nickel Hydroxide Modified Au Electrode in Alkaline Solution
✍ Scribed by CanHui Xiang; QingJi Xie; Shouzhuo Yao
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 144 KB
- Volume
- 15
- Category
- Article
- ISSN
- 1040-0397
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✦ Synopsis
The electrochemical quartz crystal impedance (EQCI) technique has been applied to investigate glucose oxidation on bare and Ni(OH) 2 -modified Au electrodes in 0.2 mol L À1 KOH aqueous solution. The EQCI responses suggest different contributions of H -release and OH À -incorporation reactions of the Ni(OH) 2 -film redox process in 0.2 mol L À1 aqueous KOH at different potentials. Glucose adsorption on the Ni(OH) 2 -modified Au electrode was studied. A mechanism for potential cyclic redox process of glucose at Ni(OH) 2 -modified Au electrode is suggested, mainly based on a comparative EQCI analysis with direct glucose oxidation on bare gold and glucose ad-/desorption on Ni(OH) 2 film.