Augmented formic acid electro-oxidation at a co-electrodeposited Pd/Au nanoparticle catalyst |
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| Affiliation: | 1. Department of Chemical Engineering, Faculty of Engineering, The British University in Egypt, Cairo 11837, Egypt;2. Chemistry Department, Faculty of Science, Cairo University, Cairo 12613, Egypt;3. Chemistry Department, Faculty of Science, Ain Shams University, 11566 Abbassia, Cairo, Egypt |
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| Abstract: | In this study, the formic acid electro-oxidation reaction (FAEOR) was catalyzed on a Pd-Au co-electrodeposited binary catalyst. The kinetics of FAEOR were intensively impacted by changing the Pd2+:Au3+ molar ratio in the deposition medium. The Pd1-Au1 catalyst (for which the Pd2+:Au3+ molar ratio was 1:1) acquired the highest activity with a peak current density for the direct FAEOR (Ip) of 4.14 mA cm?2 (ca. 13- times higher than that (ca. 0.33 mA cm?2) of the pristine Pd1-Au0 catalyst). It also retained the highest stability that was denoted in fulfilling ca. 0.292 mA cm?2 (ca. 19-times higher than 0.015 mA cm?2 of the pristine Pd1-Au0 catalyst) after 3600 s of continuous electrolysis at 0.05 V. The CO stripping and impedance measurements confirmed, respectively, the geometrical and electronic enhancements in the proposed catalyst. |
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| Keywords: | Pd-Au Co-electrodeposition Fuel Cells Formic acid oxidation Poisoning |
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