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Low load Pt catalyst with surface functionalised carbon supports for PEM fuel cells: half and full cell asssessments
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ABSTRACT: Current US DOE 2020 targets for electrocatalysts aim for a total platinum group metals (PGM) loading of 0.125 mgcm-2 on membrane-electrode assemblies. The catalysts are expected to endure an elevated number of load cycles in order to comply with the expected 5000 h stack lifetime. At the stated PGM low loading attributes of performance, power and durability, as well as costs, are simultaneously required. The
present paper deals with performance assessment of new catalyst using Pt nanoparticles and a surface functionalized carbon support. Due to its relevance to fuel cell operation, the stability and durability were assessed in half cell mode, through the application of demanding aging cycling protocols (30000 cycles). Full fuel cell assessments were also conducted entailing power density curves and cell electrochemical impedance. Results denote significant improvements in cell performance as well as in catalyst stability, regarding a commercial catalyst tested in the same conditions, at Pt loadings of 0.1 mgcm-2.
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Materials Platinum-group metals Electrocatalyst Fuel cells Electrochemical properties
Contexto Educativo
Citação
Capelo, A... [et.al.] - Low load Pt catalyst with surface functionalised carbon supports for PEM fuel cells: half and full cell asssessments. In: HYPOTHESIS XIV: XIV Hydrogen Power Theoretical and Engineering Solutions International Symposium, Book of Abstracts, Foz do Iguaçu, Brazil, 24-26 april, 2019.