Preparation of Highly Dispersed Copper Particles in Zeolite [in Japanese]
Access this Article
Search this Article
Temperature programmed reduction and desorption techniques have been used to investigate the reduction process of CuY. The reduction of Cu^2+ ions in zeolite with H_2 occurs via a two-step mechanism in which Cu^+ is first formed and then reduced to metal. In the first step of reduction NH_3 was used as the reducing agent instead of H_2. Cu particles in the reduced CuY with NH_3 pretreatment were uniformly dispersed compared with those of CuY without one. The average particle size of Cu metal was estimated to be 8.4 nm for the former and 18.5 nm for the latter. The detailed mechanism of reduction process of CuY has been discussed by the physico-chemical measurements, such as mass spectrometry, transmission electron microscope, infrared spectroscopy and electron spin resonance.
- Bulletin of the Faculty of Liberal Arts,Nagasaki University. Natural science
Bulletin of the Faculty of Liberal Arts,Nagasaki University. Natural science 27(1), p1-13, 1986-07