Spinel CuFe2O4: a precursor for copper catalyst with high thermal stability and activity View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2005-03

AUTHORS

Satoshi Kameoka, Toyokazu Tanabe, An Pang Tsai

ABSTRACT

Spinel CuFe2O4 has been studied as a precursor for copper catalyst. The spinel CuFe2O4 was effectively formed on the SiO2 by calcination in air at 800 °C with the atomic ratio of Fe/Cu = 2. The spinel CuFe2O4 on the SiO2 was reduced to fine dispersion of Cu and Fe3O4 particles by the H2 reduction at 240 °C. After H2 reduction at 600 °C, sintering of Cu particles over the CuFe2O4/SiO2 (Fe/Cu = 2) was inhibited significantly, while fatal sintering of Cu particles over the Cu/SiO2 (Fe/Cu = 0) occurred. The CuFe2O4/SiO2 catalyst exhibited much higher activity and thermal stability for steam reforming of methanol (SRM), compared with the Cu/SiO2 catalyst. The spinel CuFe2O4 on the SiO2 can be regenerated after an intentional sintering treatment by calcination in air at 800 °C where the activity is also restored completely. Based on these findings, we propose that spinel CuFe2O4 is an effective precursor for a high performance copper catalyst in which the immiscible interaction between Cu and Fe (or Fe oxide) plays an important role in the stabilization of Cu particles. More... »

PAGES

89-93

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10562-004-3091-z

DOI

http://dx.doi.org/10.1007/s10562-004-3091-z

DIMENSIONS

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