Sintering Resistance and Catalytic Activity of Platinum Nanoparticles Covered with a Microporous Silica Layer Using Methyltriethoxysilane.

Carbon black (CB)-supported Pt metal nanoparticles were covered with microporous silica layers using successive hydrolysis of 3-aminopropyl-triethoxysilane (APTES) and methyltriethoxysilane (MTES). The Pt/CB nanoparticles covered with microporous silica layers showed the high sintering resistance of Pt metal particles to thermal treatment at 973 K in a H₂ atmosphere as compared with Pt/CB. As a result, this catalyst showed higher catalytic activity for cyclohexane decomposition than Pt/CB after thermal treatment. [Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR]