Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7738986 | Journal of Power Sources | 2014 | 10 Pages |
Abstract
The electrocatalytic oxidation of ethanol was investigated in a Proton Exchange Membrane Electrolysis Cell (PEMEC) working at low temperature (20°C) on several Pt-based catalysts (Pt/C, PtSn/C, PtSnRu/C) in order to produce very clean hydrogen by electrolysis of a biomass compound. The electrocatalytic activity was determined by cyclic voltammetry and the rate of hydrogen evolution was measured for each catalyst at different current densities. The cell voltages UEtOH were recorded as a function of time for each current density. At 100 mA cmâ2, i.e. 0.5 A with the 5 cm2 surface area PEMEC used, the cell voltage did not exceed 0.9 V for an evolution rate of about 220 cm3 of hydrogen per hour and the electrical energy consumed was less than 2.3 kWh (Nm3)â1, i.e. less than one half of the energy needed for water electrolysis (4.7 kWh (Nm3)â1 at UH2O = 2 V). This result is valid for the decomposition of any organic compound, particularly those originated from biomass resource, provided that their electro-oxidation rate is sufficient (>100 mA cmâ2) at a relatively low cell voltage (Ucell < 1 V) which necessitates the development of efficient electrocatalysts for the electrochemical decomposition of this compound.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Claude Lamy, Thomas Jaubert, Stève Baranton, Christophe Coutanceau,