Gold nano-particles stabilized in mesoporous MCM-48 as active CO-oxidation catalyst

✍ Scribed by M. Bandyopadhyay; O. Korsak; M.W.E. van den Berg; W. Grünert; A. Birkner; W. Li; F. Schüth; H. Gies

• Book ID: 104055335
• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 327 KB
• Volume: 89
• Category: Article
• ISSN: 1387-1811
• DOI: 10.1016/j.micromeso.2005.09.029

✦ Synopsis

Gold in nano-crystal size is known as highly active CO-oxidation catalyst. Using simple deposition techniques gold has been deposited as $3 nm particles inside the channels of mesoporous silica-TiO 2 -MCM-48. In the presence of gold nano-particles the catalyst converts CO to CO 2 at 50% level at À20 °C. The composite is stable against sintering up to at least 200 °C. XANES and EXAFS confirm the coexistence of elementary and ionic gold during the catalytic activity.