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A direct borohydride–peroxide fuel cell using a Pd/Ir alloy coated microfibrous carbon cathode

By C. Ponce de León, F.C. Walsh, C.J. Patrissi, M.G. Madeiros, R.R. Bessette, R.R Reeve, J.B. Lakeman, A. Rose and D. Browning

Abstract

A direct borohydride fuel cell with a Pd/Ir catalysed microfibrous carbon cathode and a gold-catalysed microporous carbon cloth anode is reported. The fuel and oxidant were NaBH4 and H2O2, at concentrations within the range of 0.1–2.0 mol dm-3 and 0.05–0.45 mol dm-3, respectively. Different combinations of these reactants were examined at 10, 25 and 42 oC. At constant current density between 0 and 113 mA cm-2, the Pd/Ir coated microfibrous carbon electrode proved more active for the reduction of peroxide ion than a platinised-carbon one. The maximum power density achieved was 78mWcm2 at a currentdensity of 71 mA cm-2 and a cell voltage of 1.09 V

Topics: TP, QD
OAI identifier: oai:eprints.soton.ac.uk:63183
Provided by: e-Prints Soton

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