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Title: Role of Surface Cobalt Silicate in Single-Walled Carbon Nanotube Synthesis from Silica-Supported Cobalt Catalysts

Abstract

A silica-supported cobalt catalyst has been developed via incipient wetness impregnation for high-yield synthesis of single-walled carbon nanotubes (SWNTs). Co/SiO{sub 2}-impregnated catalysts have not been observed to be efficient for SWNT synthesis. Using an appropriately chosen precursor, we show that effective catalysts can be obtained for SWNT synthesis with yields up to 75 wt %. Detailed characterization indicates that the active sites for SWNT synthesis are small cobalt particles resulting from the reduction of a highly dispersed surface cobalt silicate species. The SWNTs produced by this catalyst are of high quality and easy to purify, and the process is simple and scalable.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
DOE - OFFICE OF SCIENCE
OSTI Identifier:
1020158
Report Number(s):
BNL-96008-2011-JA
Journal ID: ISSN 1936-0851; TRN: US201116%%138
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
ACS Nano
Additional Journal Information:
Journal Volume: 4; Journal Issue: 3; Journal ID: ISSN 1936-0851
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CARBON; CATALYSTS; CHEMICAL VAPOR DEPOSITION; COBALT; COBALT SILICATES; IMPREGNATION; NANOTUBES; PRECURSOR; SYNTHESIS; national synchrotron light source

Citation Formats

Li, N, Wang, X, Derrouiche, S, Haller, G, and Pfefferle, L. Role of Surface Cobalt Silicate in Single-Walled Carbon Nanotube Synthesis from Silica-Supported Cobalt Catalysts. United States: N. p., 2010. Web. doi:10.1021/nn901812t.
Li, N, Wang, X, Derrouiche, S, Haller, G, & Pfefferle, L. Role of Surface Cobalt Silicate in Single-Walled Carbon Nanotube Synthesis from Silica-Supported Cobalt Catalysts. United States. doi:10.1021/nn901812t.
Li, N, Wang, X, Derrouiche, S, Haller, G, and Pfefferle, L. Fri . "Role of Surface Cobalt Silicate in Single-Walled Carbon Nanotube Synthesis from Silica-Supported Cobalt Catalysts". United States. doi:10.1021/nn901812t.
@article{osti_1020158,
title = {Role of Surface Cobalt Silicate in Single-Walled Carbon Nanotube Synthesis from Silica-Supported Cobalt Catalysts},
author = {Li, N and Wang, X and Derrouiche, S and Haller, G and Pfefferle, L},
abstractNote = {A silica-supported cobalt catalyst has been developed via incipient wetness impregnation for high-yield synthesis of single-walled carbon nanotubes (SWNTs). Co/SiO{sub 2}-impregnated catalysts have not been observed to be efficient for SWNT synthesis. Using an appropriately chosen precursor, we show that effective catalysts can be obtained for SWNT synthesis with yields up to 75 wt %. Detailed characterization indicates that the active sites for SWNT synthesis are small cobalt particles resulting from the reduction of a highly dispersed surface cobalt silicate species. The SWNTs produced by this catalyst are of high quality and easy to purify, and the process is simple and scalable.},
doi = {10.1021/nn901812t},
journal = {ACS Nano},
issn = {1936-0851},
number = 3,
volume = 4,
place = {United States},
year = {2010},
month = {1}
}