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Investigation of the electrocatalytic activity of boron-doped diamond electrodes modified with palladium or gold nanoparticles for oxygen reduction reaction in basic medium |
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| Institution: | 1. Laboratoire d''électrochimie et de physicochimie des matériaux et des interfaces (LEPMI), CNRS–INPG–UJF, 1130, rue de la Piscine, BP 75, 38402 Saint-Martin-d''Hères cedex, France;2. Institut de recherche interdisciplinaire (IRI, USR CNRS-3078) and électronique, de microélectronique et de nanotechnologie (IEMN), UMR CNRS 8520, Cité scientifique, avenue Poincaré, BP 60069, 59652 Villeneuve-d''Ascq, France |
| Abstract: | The paper reports on the electrocatalytic activity of boron-doped diamond (BDD) electrodes electrochemically modified with palladium (Pd) or gold nanoparticles (Au NPs) towards oxygen reduction reaction (ORR) in alkaline medium. The BDD/Pd NP interface shows a well-defined diffusion-controlled voltammetric oxygen reduction peak at −0.25 V vs. Ag/AgCl. This is more positive than the ORR peak at −0.59 V vs. Ag/AgCl observed on BDD/Au-NP composite electrodes. The ORR proceeds via a four-electron process in both cases. |
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