Ni and NiO catalytic nanoparticles were precipitated onto mesoporous silica and zeolite by rotary chemical vapor deposition (RCVD) using NiCp2 as a precursor. The diameter of the nanoparticles precipitated onto zeolite increased from 5 to 50 nm when the oxygen flow rate (RO2) increased from 0 to 0.33 × 10-6m3 s-1, whereas that of the nanoparticles precipitated onto mesoporous silica was 5 nm, independent of RO2. The nanoparticles could be precipitated inside of the mesoporous silica pores but outside the zeolite pores. The highest H2 production rate in the methanolsteam reforming reaction was 1150 × 10-3 mol kg-1 s-1 at 633 K, which was achieved with a Ni/NiO catalyst on mesoporous silica, and this H2 production rate is almost six times greater than that of the best Ni catalysts reported in literature.
ASJC Scopus subject areas
- 化学 (全般)