Javier Parrondo - Electrocatalytic Performance of In2O3-Supported Pt/C Nanoparticles for Ethanol Electro-oxidation in Direct Ethanol Fuel Cells

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      Publication Details (including relevant citation   information):

      Parrondo, J., Santhanam, R., Mijangos, F., Rambabu, B.   International Journal of Electrochemical Science, 2010, 5,   1342-1354


      In2O3 supported Pt/C (Pt/C-   In2O3) composite electrocatalysts has been   prepared from In2O3 nanoparticles prepared   by chemical reduction process and the commercially available   Pt/C. X-ray diffraction, scanning electron microscopy-energy   dispersive spectroscopy (SEM-EDS) show that   In2O3 nanoparticles are well distributed on   Pt/C and In2O3 has the crystallite size of   20 nm. High resolution transmission electron microscopy (HR-TEM)   also indicates that the In2O3 particles   with a crystallite size of 5 nm are highly dispersed on the   surface of the Pt/C. The Pt/C- In2O3  nanoparticles demonstrate a higher activity towards ethanol   oxidation than Pt/C despite lower electrochemical surface area.   Since Nafion membrane is not suitable for high operating   temperature, the experiments are conducted using phosphoric acid   doped polybenzimidazole (PBI) membrane. Fuel cell polarization   data are obtained using Pt/C and Pt/C-In2O3  at different high operating temperatures with oxygen as oxidant   and ethanol as fuel. In all the test conditions, the performance   of Pt/C-In2O3 is found to be higher   compared to that of Pt/C. This result indicates the active   participation of In2O3 significantly   improves the catalytic activity of Pt/C in the ethanol oxidation   process. Hence, these results suggest that   In2O3 supported Pt/C assembled with PBI   membrane could be considered as an effective composite   electrocatalyst for ethanol oxidation at high temperature in   direct ethanol fuel cells.

      Address (URL): http://www.electrochemsci.org/papers/vol5/5091342.pdf