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Self-assembly of CNTs@Ni foam electrode material and its activation effect during catalytic reforming of bio-oil model compound for hydrogen at different temperatures.
- Source :
-
Fuel . Mar2023, Vol. 336, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- [Display omitted] • Carbon nanotubes (CNTs) with tip-growth mechanism were generated at 600 °C. • More amorphous carbon and carbon nanofibers (CNFs) were formed at 700 °C. • H 2 yield exhibited the "N" type trend as temperature increasing from 500 °C to 800 °C. • H 2 yield at 600 °C was higher than that at 700 °C due to the self-activation of CNTs. • Self-assembled CNTs@Ni foam at 600 °C performed best electrochemical performance. The H 2 production and self-assembly CNTs over Ni-Fe/Ni foam catalyst were investigated at different temperatures during steam reforming of bio-oil model compound. The formation of CNTs, CNFs and amorphous carbon and their different effects on catalytic activity were analyzed. With the temperature increasing from 500 °C to 800 °C, the amount of carbon deposition firstly increased and then decreased. It showed the highest amount of carbon deposition and largest proportion of CNTs (over 60 %) at 600 °C. The average diameter of CNTs was 15.18 nm. By contrast, more than 70 % of carbon deposition was amorphous carbon, and the CNFs with larger diameter (over 100 nm) were formed at 700 °C, which attributed to the agglomeration of metal particles at high temperature. The high reaction temperatures increased H 2 yield and pyrrole conversion, but differently, those at 600 °C was remarkably higher than that at 700 °C. It revealed that tip-growth of CNTs at 600 °C performed the self-activation effect to increase the catalytic activity, while the amorphous carbon generated at 700 °C deactivated the catalyst. After the reaction at 600 °C, the self-assemble of CNTs@Ni foam material showed the highest electrochemistry performance. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00162361
- Volume :
- 336
- Database :
- Academic Search Index
- Journal :
- Fuel
- Publication Type :
- Academic Journal
- Accession number :
- 161210152
- Full Text :
- https://doi.org/10.1016/j.fuel.2022.127155