Palladium is one of the best anodic catalysts for Alkaline Direct Alcohol Fuel Cell (DAFC) applications. However, its adoption in Fuel Cells (FCs) is still limited because of the deactivation of the catalyst, which hinders the long-term performance stability of the devices. In this article, we report the results of a Fixed Energy X-Ray Absorption Voltammetry (FEXRAV) investigation of a carbon-supported palladium electrocatalyst operating in a complete alkaline direct ethanol fuel cell (DEFC). Our results show palladium dissolution unambiguously, especially at cell polarizations corresponding to high anodic stresses. We have also investigated the behaviour of Pd electrocatalyst in a direct alkaline formate fuel cell (DFFC). Data show that when using formate as a fuel, the electrode Pd loss is negligible compared to the case of DEFC.

Experimental evidence of palladium dissolution in anodes for alkaline direct ethanol and formate fuel cells / Berretti, E.; Pagliaro, M.V.; Giaccherini, A.; Montegrossi, G.; Di Benedetto, F.; Lepore, G.O.; D'Acapito, F.; Vizza, F.; Lavacchi, A.. - In: ELECTROCHIMICA ACTA. - ISSN 0013-4686. - ELETTRONICO. - 418:(2022), pp. 140351-140351. [10.1016/j.electacta.2022.140351]

Experimental evidence of palladium dissolution in anodes for alkaline direct ethanol and formate fuel cells

Lepore, G. O.;
2022

Abstract

Palladium is one of the best anodic catalysts for Alkaline Direct Alcohol Fuel Cell (DAFC) applications. However, its adoption in Fuel Cells (FCs) is still limited because of the deactivation of the catalyst, which hinders the long-term performance stability of the devices. In this article, we report the results of a Fixed Energy X-Ray Absorption Voltammetry (FEXRAV) investigation of a carbon-supported palladium electrocatalyst operating in a complete alkaline direct ethanol fuel cell (DEFC). Our results show palladium dissolution unambiguously, especially at cell polarizations corresponding to high anodic stresses. We have also investigated the behaviour of Pd electrocatalyst in a direct alkaline formate fuel cell (DFFC). Data show that when using formate as a fuel, the electrode Pd loss is negligible compared to the case of DEFC.
2022
418
140351
140351
Berretti, E.; Pagliaro, M.V.; Giaccherini, A.; Montegrossi, G.; Di Benedetto, F.; Lepore, G.O.; D'Acapito, F.; Vizza, F.; Lavacchi, A.
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1270260
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