The role of Pt loading on reduced graphene oxide support in the polyol synthesis of catalysts for oxygen reduction reaction

Common carbon-blacks have shown insufficient stability as cathodic catalyst supports for proton exchange membrane fuel cells (PEMFCs). In this regard, alternative supports have been proposed and, specifically graphene or reduced graphene oxide (rGO), have attracted special attention. Herein, a set o...

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Bibliographic Details
Published in:International journal of hydrogen energy 2020-08, Vol.45 (40), p.20594-20604
Main Authors: Lagarteira, Tiago, Delgado, Sofia, Fernandes, Celina, Azenha, Cátia, Mateos-Pedrero, Cecilia, Mendes, Adélio
Format: Article
Language:English
Subjects:
Catalyst durability
Oxygen reduction reaction
Proton exchange membrane fuel cell
Reduced graphene oxide support
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Summary:Common carbon-blacks have shown insufficient stability as cathodic catalyst supports for proton exchange membrane fuel cells (PEMFCs). In this regard, alternative supports have been proposed and, specifically graphene or reduced graphene oxide (rGO), have attracted special attention. Herein, a set of electrocatalysts using reduced graphene oxide (rGO) as support is synthetized by a modified polyol method. The influence of Pt loading on the support is studied and compared with conventional supports, considering Pt particle morphologies and oxygen reduction reaction (ORR) performance in rotating disk electrode (RDE). Despite Pt average particle size typically increases with the Pt loading, 30 wt% of Pt on rGO is the optimal Pt loading, yielding the highest ORR activity among the rGO-supported electrocatalysts. These results show that both Pt loading and type of support greatly impact on the morphology and electrochemical performance of Pt nanoparticles. [Display omitted] •30 wt.% of Pt/rGO presented the best Pt particle dispersion on the support.•rGO-supported catalysts displayed impressive area-specific ORR activities.•Increasing Pt loading on rGO led to higher Pt average particle size.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2020.02.022