Hsien-Ju Tien

Kinetics of oxygen reduction at oxide-derived Pd electrodes in alkaline solution

Oxygen reduction at oxide-derived Pd electrodes is investigated by using the rotating disc electrode technique. On the basis of these experiments along with further data analysis (ie reaction orders, Tafel slopes, etc.), a mechanism of oxygen reduction on an oxide-derived Pd electrode is proposed to explain the observed rate equation.

Adsorption and electrokinetics of glucose reduction

Abstract 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 concentration of glucose. 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 reaction 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

Electroorganic reactions on organic electrodes—XII. Functional group-selective reduction using electrodes coated with LB-films of a quaternary ammonium salt: selective reduction of hydroxyl groups of α-hydroxyaldehydes

Abstract Glassy carbon electrodes coated with LB(Langmuir—Blodgett)-films of a dimethyldioctadecylammonium salt were found to reduce selectively the hydroxyl groups of α-hydroxyaldehydes having reducible hydroxyl and formyl groups at the same carbon atoms. Similar selective reduction was also observed at an uncoated glassy carbon electrode in a cathodic solution containing a tetraethylammonium salt as a co-supporting electrolyte in high concentrations such as 500 mM. Reduction mechanism was also discussed from electrochemical and organic-chemical aspects.