Adsorption and electrokinetics of glucose reduction

✍ Scribed by Tse-Chaun Chou; Wen-Janq Chen; Hsien-Ju Tien; Jiin-Jiang Jow; Tsutomu Nonaka

• Book ID: 103065481
• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 896 KB
• Volume: 30
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(85)87013-4

✦ Synopsis

The kinetics of cathodic reduction of glucose were studied by a rotating disk electrode at rotation speeds from 500 to 6000 rpm and zero to 2.0 M ooncentration of ghtcose. sodium sulfite was used as the supporting electrolyte as well as the reducing mediator. Both the experimental results and the theoretical analysis indicated that several reactidn steps occurred for the cathodic reduction of glucose. The results also revealed that the adsorption of glucose on a cathode played an important role during the electrolysis. The reaction mechanism was proposed and a mathematical model was developed. The model correlated well with the experimental results. The rate determining step was found to be the cathodic reduction of the sodium cation. The rate current of the electroreduction of glucose can be expressed as i = 2.147 x iOm3 exp(-0063Ftj/RT) TSE-CHUAN CHOU et al. 0 rotating speed of the working electrode, rpm p viscosity of electrolyte, g cm-' s-I PO viscosity of water, g cm-I Y kinematic viscosity, cm's_' P density of electrolyte, g cm-3