Adsorbed Hydrogen as a Site-Occupying Species in the Electrocatalytic Oxidation of Formate on Pd/C in Alkaline Medium

2018 ◽  
Vol 165 (15) ◽  
pp. J3266-J3270 ◽  
Author(s):  
Myounghoon Choun ◽  
Sujik Hong ◽  
Jaeyoung Lee
Keyword(s):  
Alkaline Medium ◽  
Electrocatalytic Oxidation ◽  
Adsorbed Hydrogen ◽  
A Site

Adsorption and Oxidation of Thiosulfate on the Platinum Electrode in a Slightly Alkaline Medium

2000 ◽  
Vol 65 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Tomáš Loučka
Keyword(s):  
Alkaline Medium ◽  
Oxidation Reaction ◽  
Open Circuit Potential ◽  
Platinum Electrode ◽  
Adsorbed Layer ◽  
Open Circuit ◽  
Adsorbed Hydrogen ◽  
Oxidation Number ◽  
Hydrogen Electrode ◽  
Layer Region

The aim of this research was to study the oxidation and reduction of the adsorbed thiosulfate on the platinum electrode in a slightly alkaline medium. The adsorption was performed at the open circuit conditions. The reduction of the adsorbed layer in the hydrogen region is slower in a slightly alkaline medium than in acid. The mechanism of reduction and oxidation of adsorbed molecules is probably the same. The nonstationary currents measured in presence of thiosulfates showed that the change in the oxidation number does not take place during the adsorption in the double layer region. In the hydrogen region, thiosulfate replaces the adsorbed hydrogen while beeing reduced. Nonstationary currents at higher concentrations of thiosulfate indicate the presence of more layers on the electrode. Upon reaching higher concentrations of thiosulfate the oxidation reaction takes place between thiosulfate in solution and adsorbed product of its reduction. The open circuit potential of the platinum electrode measured in a thiosulfate solution was 0.780 and 0.783 V against the hydrogen electrode in the same solution.

Electrocatalytic oxidation of readily available disaccharides in alkaline medium at gold electrode

2010 ◽  
Vol 55 (9) ◽  
pp. 3157-3163 ◽  
Author(s):  
P. Parpot ◽  
V.P. Muiuane ◽  
V. Defontaine ◽  
A.P. Bettencourt
Keyword(s):  
Alkaline Medium ◽  
Gold Electrode ◽  
Electrocatalytic Oxidation
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