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- W4366992896 abstract "Graphene has been proposed as support or as co-support for Proton Exchange Membrane Fuel cells (PEMFCs) electrocatalysts due to its high electronic conductivity, corrosion stability and high specific surface area compared to common carbon blacks, such as Vulcan. Despite such outstanding properties, comprehensive studies on long-term stability of graphene-supported Oxygen Reduction Reaction (ORR) catalysts are still unavailable or limited. The stability of graphene as support is now studied and compared with carbon black in terms of electrochemical performance and degradation mechanisms. Catalytic layers with Pt/G were prepared and subjected to a set of three different Accelerated Stress Tests (ASTs): cycling at high potentials, Open Circuit Potential (OCP) holding and cycling at low potentials. This study aims to assess if and why graphene is a better candidate as support. The Pt/G catalyst outperformed the reference catalyst in all ASTs, delivering both higher electrochemical active surface area (ECSA) and ORR mass-specific activity. Such electrochemical performance was correlated with morphological evidences associated to the support itself and with Pt nanoparticles." @default.
- W4366992896 created "2023-04-27" @default.
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- W4366992896 date "2023-06-01" @default.
- W4366992896 modified "2023-09-30" @default.
- W4366992896 title "Oxygen reduction stability of graphene-supported electrocatalyst: Electrochemical and morphological evidences" @default.
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- W4366992896 doi "https://doi.org/10.1016/j.ijhydene.2023.03.359" @default.
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