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Carbon nanotubes-based PdM bimetallic catalysts through N(4)-system for efficient ethanol oxidation and hydrogen evolution reaction

Transitional metal-nitrogen-carbon system is a promising candidate to replace the Pt-based electrocatalyst due to its superior activity, durability and cost effectiveness. In this study, we have designed a simple strategy to fabricate carbon nanotubes-supported binary-nitrogen-carbon catalyst via we...

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Detalles Bibliográficos
Autores principales: Begum, Halima, Ahmed, Mohammad Shamsuddin, Lee, Dong-Weon, Kim, Young-Bae
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6667450/
https://www.ncbi.nlm.nih.gov/pubmed/31363157
http://dx.doi.org/10.1038/s41598-019-47575-w
Descripción
Sumario:Transitional metal-nitrogen-carbon system is a promising candidate to replace the Pt-based electrocatalyst due to its superior activity, durability and cost effectiveness. In this study, we have designed a simple strategy to fabricate carbon nanotubes-supported binary-nitrogen-carbon catalyst via wet-chemical method. Palladium and transitional metals (M, i.e. manganese cobalt and copper) nanoparticles are anchored through four-nitrogen system onto carbon nanotubes (denoted as PdM-N(4)/CNTs). This material has been used as bifunctional electrocatalyst for electrochemical ethanol oxidation reaction and hydrogen evolution reaction for the first time. The N(4)-linked nanoparticles onto carbon nanotubes plays a crucial role in intrinsic catalytic activity for both reactions in 1 M KOH electrolyte. Among three PdM-N(4)/CNTs catalysts, the PdMn-N(4)/CNTs catalyst exhibits higher catalytic activity in terms of current density, mass activity and stability compared to the benchmark Pt/C. The robust electrocatalysis are inherited from the better attachment of PdMn through N(4)-system onto carbon nanotubes, comparatively smaller particles formation with better dispersion and higher electrical conductivity.