| Autor: |
Alvarenga, Gabriel M., Palombarini, Julio, Gonçalves, Rosana A., Berengue, Olivia M., Nunes, Ronaldo S., Santos, Sydney F., Villullas, Hebe M., Ciapina, Eduardo G. |
| Předmět: |
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| Zdroj: |
Journal of Solid State Electrochemistry; Sep2023, Vol. 27 Issue 9, p2465-2477, 13p |
| Abstrakt: |
The aim of this work was to study the effect of a RuO2 support on the activity of Pd nanoparticles for formic acid oxidation, comparing the results with those obtained for Pd/C. In contrast with reports of enhancing effects of RuO2 for other systems, such as methanol oxidation on Pt particles, our data reveal a detrimental effect of the RuO2 support on the activity of Pd nanoparticles for the oxidation of formic acid. FTIR spectra show CO2 formation at potentials as low as 0.10 V and absence of adsorbed CO signals, suggesting that a bifunctional mechanism involving OH species on the oxide support surface does not occur nor has a significant contribution and that formic acid oxidation on Pd/RuO2 and Pd/C takes place by the direct pathway. The unfavorable effect of the RuO2 support on activity seems likely to be due to metal-support interactions that modify the Pd electronic properties. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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