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Updated: Jun 27, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
Hydrogen adsorption onto nickel modified carbon nanotubes
M C Coelho1, E Titus, G Cabral
1Centre of Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro 3810-193, Portugal.
Nickel-doped multi-walled carbon nanotubes (MWCNTs) show enhanced hydrogen adsorption. This surface adsorption is attributed to nickel
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Carbon nanotubes (CNTs) are promising materials for hydrogen storage.
- Surface modification can enhance hydrogen adsorption properties of CNTs.
Purpose of the Study:
- To investigate hydrogen adsorption on nickel-doped multi-walled carbon nanotubes (MWCNTs).
- To explore the effect of nickel doping on the structural and adsorption properties of MWCNTs.
Main Methods:
- Hot Filament Chemical Vapour Deposition (HFCVD) for nickel doping of MWCNTs.
- Functionalization using HNO3/H2O2.
- Characterization via SEM, EDS, FTIR, and Raman spectroscopy.
Main Results:
- Nickel doping was confirmed by EDS.
- Raman spectroscopy indicated increased defects in nickel-modified MWCNTs, evidenced by a higher D and G band intensity ratio (ID/IG).
- FTIR spectra confirmed surface adsorption of hydrogen, with no C-H band formation.
Conclusions:
- Nickel doping enhances hydrogen adsorption on MWCNTs.
- Increased defects and nickel's catalytic activity facilitate hydrogen access.
- Hydrogen adsorption primarily occurs via surface interaction on the modified MWCNTs.
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