Porous Hollow PtNi/C Electrocatalysts: Carbon Support Considerations To Meet Performance and Stability Requirements
| Autor: | Yan Busby, Plamen Atanassov, Vincent Martin, Frédéric Maillard, Raphaël Chattot, Tristan Asset, Aleksey Serov, Céline Bonnaud, Nathalie Job, Vaios Stergiopoulos, Laetitia Dubau, Alexandre Crisci |
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| Přispěvatelé: | Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces (LEPMI ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Chimie du CNRS (INC)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire de Génie Chimique (LGC), Université de Liège, Centre de Recherche en Physique de la Matière et du Rayonnement [Namur] (PMR), Université de Namur [Namur] (UNamur), Science et Ingénierie des Matériaux et Procédés (SIMaP ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Center For Emerging Energy Technologies [Albuquerque] (CEET), The University of New Mexico [Albuquerque] |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
chemistry.chemical_element Proton exchange membrane fuel cell Nanoparticle 02 engineering and technology Carbon nanotube 010402 general chemistry Electrochemistry 01 natural sciences Catalysis law.invention law carbon supported porous hollow Pt-based nanoparticles Electrochemical potential oxygen reduction reaction Graphene technology industry and agriculture General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] startup/shutdown events Surface modification 0210 nano-technology Carbon |
| Zdroj: | ACS Catalysis ACS Catalysis, American Chemical Society, 2018, 8 (2), pp.893-903. ⟨10.1021/acscatal.7b03539⟩ |
| ISSN: | 2155-5435 |
| Popis: | The influence of the texture, structure, and chemistry of different carbon supports on the morphological properties, oxygen reduction reaction (ORR) activity, and stability of porous hollow PtNi nanoparticles (NPs) was investigated. The carbon nanomaterials included carbon blacks, carbon nanotubes, graphene nanosheets, and carbon xerogel and featured different specific surface areas, degrees of graphitization, and extent of surface functionalization. The external and inner diameters of the supported porous hollow PtNi/C NPs were found to decrease with an increase in the carbon mesopore surface area. Despite these differences, similar morphological properties and electrocatalytic activities for the ORR were reported. The stability of the synthesized electrocatalysts was assessed by simulating electrochemical potential variations occurring at a proton exchange membrane fuel cell (PEMFC) cathode during startup/shutdown events. Identical location transmission electron microscopy (IL-TEM) and electrochemical methods revealed the occurrence of a carbon-specific degradation mechanism: carbon corrosion into CO2 and particle detachment were noticed on carbon xerogels and graphene nanosheets while, on carbon blacks, surface oxidation prevailed (C → COsurf) and did not result in modified electrical resistance of the catalytic layers, rendering these carbon supports better suited to prepare highly active and stable ORR electrocatalysts. |
| Databáze: | OpenAIRE |
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