ChemInform Abstract: New Hydrotalcite-Type Anionic Clays Containing Noble Metals.

✍ Scribed by F. BASILE; L. BASINI; G. FORNASARI; M. GAZZANO; F. TRIFIRO; A. VACCARI

• Publisher: John Wiley and Sons
• Year: 2010
• Weight: 27 KB
• Volume: 28
• Category: Article
• ISSN: 0931-7597
• DOI: 10.1002/chin.199708237

✦ Synopsis

hydrotalcite-type anionic clays are prepared by the coprecipitation method followed by calcination. The smaller effect of the noble metal in the as-prepared Ru-containing precursor on the lattice parameters of hydrotalcite (rhombohedral, R3m) as compared to the Rh-containing precursor is suggested to be due to a lower degree of Ru3+ incorporation in the hydrotalcite lattice. The lower catalytic activity and selectivity for the syngas formation from CH4-O2-He mixtures of Ru/Mg/Al clays calcined at 1173 K is attributed to segregation of most of Ru as highly crystalline RuO2 whereas in the calcined Rh samples Rh3+ ions are mainly present in the lattice of spinel phases.