In Direct Alcohols Fuel Cells (DAFCs), the oxidation of alcohols happens at the expenses of the Oxygen Reduction Reaction (ORR) at the cathode. DAFCs cathodes use a significant amount of platinum that is an expensive critical raw material. Moreover, platinum oxidizes alcohols a fact that combined with alcohol crossover decreases significantly the performance of the cells. The use of Fe-based (Fe-N-C) platinum group metal-free (PGM-free) cathodes is a convenient strategy to overcome these limitations. This review analyzes the application of PGM-free cathodes to DAFCs. The discussion focuses on acidic systems and covers the following subjects: i) the breakdown of DAFC cell potential in its components; ii) the analysis of the advantages from the use of PGM-freecathode; ii) a review of the performance and durability of DAFCs. The review closes with a view of the author of the future perspective for the research.
Platinum Group Metal-free (PGM-free) Fe-based (Fe-N-C) Oxygen Reduction Electrocatalysts for Direct Alcohol Fuel Cells
Enrico Berretti;Vincenzo Baglio;Andrea Marchionni;Francesco Vizza;Alessandro Lavacchi
2021
Abstract
In Direct Alcohols Fuel Cells (DAFCs), the oxidation of alcohols happens at the expenses of the Oxygen Reduction Reaction (ORR) at the cathode. DAFCs cathodes use a significant amount of platinum that is an expensive critical raw material. Moreover, platinum oxidizes alcohols a fact that combined with alcohol crossover decreases significantly the performance of the cells. The use of Fe-based (Fe-N-C) platinum group metal-free (PGM-free) cathodes is a convenient strategy to overcome these limitations. This review analyzes the application of PGM-free cathodes to DAFCs. The discussion focuses on acidic systems and covers the following subjects: i) the breakdown of DAFC cell potential in its components; ii) the analysis of the advantages from the use of PGM-freecathode; ii) a review of the performance and durability of DAFCs. The review closes with a view of the author of the future perspective for the research.File | Dimensione | Formato | |
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Descrizione: Platinum Group Metal-free (PGM-free) Fe-based (Fe-N-C) Oxygen Reduction Electrocatalysts for Direct Alcohol Fuel Cells
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