The Effect of Support on Advanced Pt-based Cathodes towards the Oxygen Reduction Reaction. State of the Art

TOC: This mini-review summarizes advanced Pt catalysts towards enhanced ORR activity and stability. Tunable ORR activity and stability can be achieved in tailoring Pt active center, depending on nature of supporting materials. [Display omitted] •Substrate effect leads to ORR activity and stability e...

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Bibliographic Details
Published in:Electrochimica acta 2015-10, Vol.179, p.108-118
Main Authors: Luo, Yun, Alonso-Vante, Nicolas
Format: Article
Language:English
Subjects:
Activity
Nanoalloys
Platinum
Stability
Substrates
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Summary:TOC: This mini-review summarizes advanced Pt catalysts towards enhanced ORR activity and stability. Tunable ORR activity and stability can be achieved in tailoring Pt active center, depending on nature of supporting materials. [Display omitted] •Substrate effect leads to ORR activity and stability enhancement of catalyst centers.•Carbon-based materials and oxide-carbon composite influences favorably the Pt electronic environment.•Pt surface modification induced via ligand effect, geometric effect, metal-substrate strong interaction, and interaction of rare earth oxide and Pt surface atoms.•Sources for enhancement of ORR activity and stability were identified. This work summarizes the advanced materials developed by various research groups for improving the stability of platinum (Pt), and Pt-based catalysts center toward the oxygen reduction reaction (ORR) in acid medium. The ORR stability enhancement of Pt catalytic center can be classified according to the different nature of the supporting materials, namely, carbon-, oxide-based-, and oxide-carbon composites. The enhancement and stability of a catalytic center can be related to either its electronic modification induced by a strong interaction with the support, another metal (alloy), or to geometric effects. In addition, other parameters come into play, the size, the morphology of the catalytic center, the temperature, the dispersion, and mass loading, along with the measuring methods. This mini-review mainly focusses on the stability improvement, depending on the substrate nature. This latter can be further modified via functionalization or by the chemical interaction nature between the substrate and catalyst.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2015.04.098