Mechanistic effects of blending formic acid with ethanol on Pd activity towards formic acid oxidation in acidic media
Author's Department
Computer Science & Engineering Department
Second Author's Department
Physics Department
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https://doi.org/10.1039/d1ra01209f
Document Type
Research Article
Publication Title
RSC Advances
Publication Date
6-29-2021
doi
10.1039/d1ra01209f
Abstract
The direct formic acid fuel cell (DFAFC) is one of the most promising direct liquid fuel cells. Pd is the most active catalyst towards formic oxidation, however, it suffers from CO-like poisoning and instability in acidic media. Blending formic acid with ethanol is known to synergistically enhance the Pt catalytic activity of Pt. However, it has not been studied in the case of Pd. In this study, ethanol/formic acid blends were tested, aiming at understanding the effect of ethanol on the formic acid oxidation mechanism at Pd and how the direct and indirect pathways could be affected. The blends consisted of different formic acid (up to 4 M) and ethanol (up to 0.5 M) concentrations. The catalytic activity of a 40% Pd/C catalyst was tested in 0.1 M H2SO4 + XFA + YEtOH using cyclic voltammetry, while the catalyst resistance to poisoning in the presence and absence of ethanol was tested using chronopotentiometry. The use of these blends is found to not only eliminate the indirect pathway but also slowly decrease the direct pathway activity too. That is believed to be due to the different ethanol adsorption orientations at different potentials. This study should open the door for further studying the oxidation of FA/ethanol blends using different pHs and different Pd-based catalysts. This journal is
First Page
22842
Last Page
22848
Recommended Citation
APA Citation
Al Najjar, T.
Ahmed, N.
&
El Sawy, E.
(2021). Mechanistic effects of blending formic acid with ethanol on Pd activity towards formic acid oxidation in acidic media. RSC Advances, 11(37), 22842–22848.
10.1039/d1ra01209f
https://fount.aucegypt.edu/faculty_journal_articles/2420
MLA Citation
Al Najjar, Taher, et al.
"Mechanistic effects of blending formic acid with ethanol on Pd activity towards formic acid oxidation in acidic media." RSC Advances, vol. 11,no. 37, 2021, pp. 22842–22848.
https://fount.aucegypt.edu/faculty_journal_articles/2420