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https://dspace.ffh.bg.ac.rs/handle/123456789/415| Title: | Platinum-rare earth cathodes for direct borohydride-peroxide fuel cells | Authors: | Cardoso, D. S.P. Santos, D. M.F. Šljukić Paunković, Biljana Sequeira, C. A.C. Macciò, D. Saccone, A. |
Keywords: | Direct borohydride fuel cells;Electrocatalytic activity;Hydrogen peroxide reduction reaction;Platinum-rare earth alloys | Issue Date: | 1-Mar-2016 | Journal: | Journal of Power Sources | Abstract: | Hydrogen peroxide (H2O2) is being actively investigated as an oxidant for direct borohydride fuel cells. Herein, platinum-rare earth (RE = Sm, Dy, Ho) alloys are prepared by arc melting and their activity for hydrogen peroxide reduction reaction (HPRR) is studied in alkaline media. Cyclic voltammetry and chronoamperometry measurements show that Pt-Sm electrode displays the highest catalytic activity for HPRR with the lowest activation energy, followed by Pt-Ho, while Pt-Dy alloys show practically no activity. Laboratory direct borohydride-peroxide fuel cells (DBPFCs) are assembled using these alloys. The DBPFC with Pt-Sm cathode gives the highest peak power density of 85 mW cm-2, which is more than double of that obtained in a DBPFC with Pt electrodes. |
URI: | https://dspace.ffh.bg.ac.rs/handle/123456789/415 | ISSN: | 0378-7753 | DOI: | 10.1016/j.jpowsour.2015.12.131 |
| Appears in Collections: | Journal Article |
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