シリカ被覆Pd 触媒の開発に関する国際共同研究 : 回分式シクロヘキサン脱水素反応におけるシンタリング耐性と触媒活性

Here we developed silica-coated Pd catalysts and applied to liquid phase catalytic reaction such as dehydrogenation of cyclohexane. Carbon black (CB)-supported Pd catalysts (Pd/CB) were covered with organosilica layers via the hydrolysis of phenyltriethoxysilane (PhTES). Coverage of Pd nanoparticles with organosilica layers suppressed particle sintering of Pd, as compared to the case of uncovered Pd/CB. The organosilica layers had hydrophobic properties because of the presence of phenyl groups. As a result, the organosilica-coated Pd catalysts prepared using PhTES showed superior catalytic performance for cyclohexane dehydrogenation, even after reduction at 623K under H2 atmosphere.