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Study of 2-Propanol, 1-Propanol, and Acetone Electrochemical Oxidation on Pt in Gelled Phosphoric Acid at 170 °C

Authors
  • Modestov, Alexander D.1
  • Tarasevich, Mikhail R.1
  • Pu, Hongting2
  • 1 Russian Academy of Sciences, A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Leninsky prosp. 31, Moscow, 119071, Russia , Moscow (Russia)
  • 2 Tongji University, Institute of Functional Polymers, School of Materials Science & Engineering, Shanghai, 201804, China , Shanghai (China)
Type
Published Article
Journal
Electrocatalysis
Publisher
Springer US
Publication Date
Sep 10, 2015
Volume
7
Issue
1
Pages
42–49
Identifiers
DOI: 10.1007/s12678-015-0280-z
Source
Springer Nature
Keywords
License
Yellow

Abstract

Electrochemical oxidation of acetone, 2-propanol, and 1-propanol on Pt was studied by slow scan rate voltammetry at 170 °C using fuel cell with the membrane of the H3PO4 doped polybenzimidazole. Reaction rate orders with respect to partial pressures of the aliphatic compounds and water vapors were determined at E = 0.5 V and at E = 0.9 V, which correspond to low and high surface oxide coverages on Pt. At E = 0.5 V close to zero reaction rate orders in respect to vapor pressures of aliphatic reactants were found. At E = 0.5 V reaction, rate orders with respect to water vapor pressure were slightly higher than unity in all cases. At E = 0.9 V oxidation, reaction rate orders with respect to aliphatic reactant vapor pressure ranged within 0.6–1. Close to zero reaction rate orders with respect to water vapor pressure were found in all cases at E = 0.9 V.

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