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Title: Catalytic graphitization of carbon aerogels by transition metals

Abstract

Carbon aerogels and Cr-, Fe-, Co-, and Ni-containing carbon aerogels were obtained by pyrolysis, at temperatures between 500 and 1,800 C, of the corresponding aerogels prepared by the sol-gel method from polymerization of resorcinol with formaldehyde. All samples were characterized by mercury porosimetry, nitrogen adsorption, X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and Raman spectroscopy. Results obtained show that carbon aerogels are, essentially, macroporous materials that maintain large pore volumes even after pyrolysis at 1,800 C. For pyrolysis at temperatures higher than 1,000 C, the presence of the transition metals produced graphitized areas with three-dimensional stacking order, as shown by HRTEM, XRD, and Raman spectroscopy. HRTEM also showed that the metal-carbon containing aerogels were formed by polyhedral structures. Cr and Fe seem to be the best catalysts for graphitization of carbon aerogels.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Univ. de Granada (ES)
OSTI Identifier:
20075544
Resource Type:
Journal Article
Journal Name:
Langmuir
Additional Journal Information:
Journal Volume: 16; Journal Issue: 9; Other Information: PBD: 2 May 2000; Journal ID: ISSN 0743-7463
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; GELS; CARBON; CAPACITIVE ENERGY STORAGE EQUIPMENT; CHROMIUM; IRON; COBALT; NICKEL; PORE STRUCTURE; CATALYSTS

Citation Formats

Maldonado-Hodar, F.J., Moreno-Castilla, C., Rivera-Utrilla, J., Hanzawa, Y., and Yamada, Y. Catalytic graphitization of carbon aerogels by transition metals. United States: N. p., 2000. Web. doi:10.1021/la991080r.
Maldonado-Hodar, F.J., Moreno-Castilla, C., Rivera-Utrilla, J., Hanzawa, Y., & Yamada, Y. Catalytic graphitization of carbon aerogels by transition metals. United States. doi:10.1021/la991080r.
Maldonado-Hodar, F.J., Moreno-Castilla, C., Rivera-Utrilla, J., Hanzawa, Y., and Yamada, Y. Tue . "Catalytic graphitization of carbon aerogels by transition metals". United States. doi:10.1021/la991080r.
@article{osti_20075544,
title = {Catalytic graphitization of carbon aerogels by transition metals},
author = {Maldonado-Hodar, F.J. and Moreno-Castilla, C. and Rivera-Utrilla, J. and Hanzawa, Y. and Yamada, Y.},
abstractNote = {Carbon aerogels and Cr-, Fe-, Co-, and Ni-containing carbon aerogels were obtained by pyrolysis, at temperatures between 500 and 1,800 C, of the corresponding aerogels prepared by the sol-gel method from polymerization of resorcinol with formaldehyde. All samples were characterized by mercury porosimetry, nitrogen adsorption, X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and Raman spectroscopy. Results obtained show that carbon aerogels are, essentially, macroporous materials that maintain large pore volumes even after pyrolysis at 1,800 C. For pyrolysis at temperatures higher than 1,000 C, the presence of the transition metals produced graphitized areas with three-dimensional stacking order, as shown by HRTEM, XRD, and Raman spectroscopy. HRTEM also showed that the metal-carbon containing aerogels were formed by polyhedral structures. Cr and Fe seem to be the best catalysts for graphitization of carbon aerogels.},
doi = {10.1021/la991080r},
journal = {Langmuir},
issn = {0743-7463},
number = 9,
volume = 16,
place = {United States},
year = {2000},
month = {5}
}