Few layer graphene synthesis on transition metal ferrite catalysts. (August 2015)

• Record Type: Journal Article
• Authors: Bacsa, Revathi R.; Cameán, Ignacio; Ramos, Alberto; Garcia, Ana B.; Tishkova, Victoria; Bacsa, Wolfgang S.; Gallagher, James R.; Miller, Jeffrey T.; Navas, Hugo; Jourdain, Vincent; Girleanu, Maria; Ersen, Ovidiu; Serp, Philippe
• Is Part Of: Carbon. Volume 89(2015)
• Page Start: 350
• Page End: 360
• Publication Date: 2015-08
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2015.03.054
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Development of cheap, green and up scalable production methods for graphene is one of the most challenging problems in its manufacture on an industrial scale. We report here a large scale substrate-free fluidized bed catalytic chemical vapour deposition (FB-CCVD) process for few layer graphene (FLG) powder production that uses a crystalline oxide catalyst of the general formula A x B3− x O4, wherein the FLG layer thickness and domain sizes can be varied. A and B can be chosen from a list of transition elements including Co, Fe, Ni, Mn, Cu and Zn. The best results in terms of activity and selectivity are obtained for the Co x Fe3− x O4 system. We also investigated the reaction mechanism using in situ EXAFS and Raman spectroscopy, and electron tomography. Since FB-CCVD processes are already used for industrial scale production of carbon nanotubes, this process should enable the large scale production of free standing FLG in the near future.