One-Pot Synthesis of Pd Nanoparticles Supported on Carbide-Derived Carbon for Oxygen Reduction Reaction

We explored two methods for synthesizing Pd nanoparticles using three different carbide-derived carbon (CDC) support materials, one of which was nitrogen-doped. These materials were studied for oxygen reduction reaction (ORR) in 0.1 M KOH solution, and the resulting CDC/Pd catalysts were characteriz...

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Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2024-06, Vol.14 (12), p.994
Main Authors: Lüsi, Madis, Erikson, Heiki, Käärik, Maike, Piirsoo, Helle-Mai, Aruväli, Jaan, Kikas, Arvo, Kisand, Vambola, Leis, Jaan, Kukli, Kaupo, Tammeveski, Kaido
Format: Article
Language:English
Subjects:
Analysis
carbide-derived carbon
Carbides
Carbon
Carbon black
Catalysts
Cdc2 protein
Chemical reduction
Citric acid
Doping
electrocatalysis
Ethanol
Ethylene glycol
Graphene
Nanoparticles
Nitrogen
Oxidation-reduction reaction
oxygen reduction reaction
Oxygen reduction reactions
Palladium
palladium catalyst
Palladium catalysts
Particle size
Pd nanoparticles
Polyvinylpyrrolidone
Povidone
Spectrum analysis
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Summary:We explored two methods for synthesizing Pd nanoparticles using three different carbide-derived carbon (CDC) support materials, one of which was nitrogen-doped. These materials were studied for oxygen reduction reaction (ORR) in 0.1 M KOH solution, and the resulting CDC/Pd catalysts were characterized using TEM, XRD, and XPS. The citrate method and the polyol method using polyvinylpyrrolidone (PVP) as a capping agent were employed to elucidate the impact of the support material on the final catalyst. The N-doping of the CDC material resulted in smaller Pd nanoparticles, but only in the case of the citrate method. This suggests that the influence of support is weaker when using the polyol method. The citrate method with CDC1, which is predominantly microporous, led to a higher degree of agglomeration and formation of larger particles in comparison to supports, which possessed a higher degree of mesoporosity. We achieved smaller Pd particle sizes using citrate and NaBH compared to the ethylene glycol PVP method. Pd deposited on CDC2 and CDC3 supports showed similar specific activity (SA), suggesting that the N-doping did not significantly influence the ORR process. The highest SA value was observed for CDC1/Pd_Cit, which could be attributed to the formation of larger Pd particles and agglomerates.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano14120994