Journal of Siberian Federal University. Chemistry / The Oxidation Glucose to Gluconic Acid by Use of Redox-Mediator - the Nickel Oxides Hydroxide Coating at the Anode Surface in Basic Solutions

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Issue
Journal of Siberian Federal University. Chemistry. 2012 5 (1)
Authors
Chaenko, Natalya V.; Kornienko, Galina V.; Pavlenko, Nina I.; Kornienko, Vasily L.
Contact information
Chaenko, Natalya V. : Institute of Chemistry and Chemical Technology SB RAS Siberian Federal University , 42 K. Marx st., Krasnoyarsk, 660049 Russia 79 Svobodny, Krasnoyarsk, 660041 Russia , e-mail: ; Kornienko, Galina V. : Institute of Chemistry and Chemical Technology SB RAS , 42 K. Marx st., Krasnoyarsk, 660049 Russia; Pavlenko, Nina I. : Institute of Chemistry and Chemical Technology SB RAS , 42 K. Marx st., Krasnoyarsk, 660049 Russia; Kornienko, Vasily L. : Institute of Chemistry and Chemical Technology SB RAS , 42 K. Marx st., Krasnoyarsk, 660049 Russia
Keywords
indirect oxidation; anode; hydrogen peroxide; oxygen; higher nickel oxides; glucose; gluconic acid
Abstract

The oxidation of glucose to gluconic acid on anodes with the redox- mediators system deposited of the higher nickel oxides in an alkaline medium, to use in situ generated active forms of oxygen has been investigated. Electrodes are designed for the depositing of higher nickel oxide at the porous matrix, which represents the composite material (carbon black and teflon). The effect of current density, temperature, reagent concentration, the scheme of the introduction of active form of oxygen on the kinetics and the selectivity of indirect oxidation of glucose to gluconic acid has been investigated. The studies have shown that active sites on the electrode surface, responsible for the regeneration of the higher oxides of nickel are blocked by glucose and its oxidation products, and it is to reduce the electrochemical activity of the electrode. Additional introduction of active forms of oxygen by the addition of hydrogen peroxide in the electrolyte promotes deeper oxidation of intermediate products, and leads to the mineralization of glucose to carbon dioxide and water. In the scheme with the cathodic reduction of oxygen to hydrogen peroxide and regeneration of NiOOH at the anode, the oxidation of glucose proceeds with the current yield is 28.7 % for the production of gluconic acid.

Pages
105-112
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/2857