ELECTROOXIDATION OF D-SORBITOL ON PLATINUM IN PERCHLORIC MEDIUM - A VOLTAMMETRIC STUDY

Authors
FONSECA I LOPES MIS SANTOS JL PROENCA L
Citation
I. Fonseca et al., ELECTROOXIDATION OF D-SORBITOL ON PLATINUM IN PERCHLORIC MEDIUM - A VOLTAMMETRIC STUDY, Electrochimica acta, 40(17), 1995, pp. 2701-2706
Citations number
18
Categorie Soggetti
Electrochemistry
Journal title
Electrochimica acta → ACNP
ISSN journal
00134686
Volume
40
Issue
17
Year of publication
1995
Pages
2701 - 2706
Database
ISI
SICI code
0013-4686(1995)40:17<2701:EODOPI>2.0.ZU;2-P
Abstract
The electrocatalytic oxidation of D-sorbitol on a polycrystalline plat inum electrode, in perchloric aqueous medium, was studied by cyclic vo ltammetry under varying sweep rate, potential limits, stirring, temper ature, pH and concentration of D-sorbitol. A value of about 50 kJ mol( -1) was obtained for the apparent activation enthalpy of the oxidation reaction at 0.1 V vs. sme. The experimental rate equation is i = kC(D -sorb)(0.4) C-H+(-0.3).exp[0.4 FE/RT], valid for [D-sorbitol] < 0.1 mo l dm(-3) and pH < 1.