Effect of impregnation solutions on the synthesis of Ni-Cu/Al2O3 catalyst to obtain carbon nanofibers

Jonathan Joseph Almiron Baca, Hermann Alcazar, Rossibel Dileydi Churata Añasco, Francine Roudet, Katir Ziouche, Didier Chicot

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The present work reports on the influence of nickel molar loading and impregnation solutions, nitrate salts and copper and nickel ammonium complexes, on the synthesis of Ni-Cu catalyst supported on alumina for obtaining carbon nanofibers by catalytic chemical vapor deposition of methane. These catalysts were characterized by N2 adsorption-desorption, x-ray Diffraction, Thermo-Gravimetric Analysis and Scanning Electron Microscopy for the carbon nanostructures analysis. The catalytic activity was studied through the carbon deposition under different conditions of temperature (600 °C and 650 °C) and pressure (in ultra-low pressure conditions and 0.5 bar). As a main result, catalyst using nitrate salts impregnation leads to the major carbon nanofibers yielding at the temperature of 600 °C. On the other hand, catalysts synthesized by ammonium complexes impregnation present also improved characteristics compared to conventional catalysts that allows considering this methodology as an interesting alternative in carbon nanofibers producing.

Original languageEnglish
Article number125010
JournalMaterials Research Express
Volume5
Issue number12
DOIs
StatePublished - Dec 2018
Externally publishedYes

Bibliographical note

Funding Information:
The authors are grateful to FONDECYT-CONCYTEC and to the Catholic University of Saint Mary (UCSM) by co-financing this research and to the University Federal of Paraiba and University of Lille for their help and technical support. This work was partly supported by the French RENATECH network.

Publisher Copyright:
© 2018 IOP Publishing Ltd.

Keywords

  • carbon nanofiber
  • catalyst
  • catalytic chemical vapor deposition
  • complex
  • impregnation
  • methane

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