Palladium is one of the best anodic catalysts for Alkaline Direct Alcohol Fuel Cell (DAFC) applications. However, its adoption in Fuel Cells (FC) 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
E Berretti;MV Pagliaro;G Montegrossi;F D'Acapito;F Vizza;A Lavacchi
2022
Abstract
Palladium is one of the best anodic catalysts for Alkaline Direct Alcohol Fuel Cell (DAFC) applications. However, its adoption in Fuel Cells (FC) 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.| File | Dimensione | Formato | |
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prod_466090-doc_183184.pdf
Open Access dal 06/04/2024
Descrizione: “This document is the Accepted Manuscript version of a Published Work that appeared in final form in https://doi.org/10.1016/j.electacta.2022.140351."
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Descrizione: Experimental evidence of Palladium dissolution in anodes for alkaline Direct Ethanol and Formate Fuel Cells
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