Nitrogen Doped Carbon Nanotubes and Nanofibers for Green Hydrogen Production: Similarities in the Nature of Nitrogen Species, Metal–Nitrogen Interaction, and Catalytic Properties

The effect of nitrogen doped bamboo-like carbon nanotubes (N–CNTs) on the properties of supported platinum (0.2 and 1 wt %) catalysts in formic acid decomposition for hydrogen production was studied. It was shown that both impregnation and homogeneous precipitation routes led to the formation of ele...

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Bibliographic Details
Published in:Energies (Basel) 2019-10, Vol.12 (20), p.3976
Main Authors: Podyacheva, Olga, Lisitsyn, Alexander, Kibis, Lidiya, Boronin, Andrei, Stonkus, Olga, Zaikovskii, Vladimir, Suboch, Arina, Sobolev, Vladimir, Parmon, Valentin
Format: Article
Language:English
Subjects:
Acetic acid
Acids
Aluminum
Carbon fibers
carbon nanofibers
carbon nanotubes
Catalysts
Cellulose
Chemical composition
Decomposition
Decomposition reactions
Energy
Experiments
Formic acid
Graphene
Green hydrogen
High temperature
hydrogen
Hydrogen production
Hydrogenation
Low level
Metals
Nanofibers
Nanomaterials
Nanoparticles
Nanotechnology
Nitrogen
nitrogen doped
Organic chemistry
Palladium
Platinum
Selectivity
Silicon dioxide
Spectrum analysis
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Summary:The effect of nitrogen doped bamboo-like carbon nanotubes (N–CNTs) on the properties of supported platinum (0.2 and 1 wt %) catalysts in formic acid decomposition for hydrogen production was studied. It was shown that both impregnation and homogeneous precipitation routes led to the formation of electron-deficient platinum stabilized by pyridinic nitrogen sites of the N–CNTs. The electron-deficient platinum species strongly enhanced the activity and selectivity of the Pt/N–CNTs catalysts when compared to the catalysts containing mainly metallic platinum nanoparticles. A comparison of bamboo-like N–CNTs and herring-bone nitrogen doped carbon nanofibers (N–CNFs) as the catalyst support allowed us to conclude that the catalytic properties of supported platinum are determined by its locally one-type interaction with pyridinic nitrogen sites of the N–CNTs or N–CNFs irrespective of substantial structural differences between nanotubes and nanofibers.
ISSN:1996-1073
1996-1073
DOI:10.3390/en12203976