Preparation of Sn-modified silica-coated Pt catalysts: A new PtSn bimetallic model catalyst for selective hydrogenation of crotonaldehyde

Hydrogen Spillover in Encapsulated Metal Catalysts: New Opportunities for Designing Advanced Hydroprocessing Catalysts

“…If the supports can provide ap ath with ar easonably low activation barrier, or if the reaction temperature is high enough to overcome the activation barrier for the migration of atomich ydrogen, hydrogen spillover may still be able to participate in the catalytic hydrogenation reactions. Very recently,s everalw orks with well-definedm odel catalysts provided strong experimental evidences supporting the catalytic functions of hydrogen spillover in aluminosilicates [4] and SiO 2 [6,7] during hydrogenation.…”

“…Nishiyama and colleagues [7] reported an interesting SiO 2 -coated Pt nanoparticles (SP) that can act as an ideal model catalyst for studying hydrogens pillover on SiO 2 support. In this work, SP was prepared using water-in-oil microemulsion ac- www.chemcatchem.org cording to the previousl iterature.…”

“…SnO x -modified silica surface adsorbed crotonaldehydeb yu sing C=Of unctional groups insteado fC = C, and hence led to the selective hydrogenation of C=O. [7] In contrast, hydrogen spillover on ap ure silica surface dominantly produced products with C=Cb ond hydrogenation. In "Hydrogen spillover in carbon" section, we also saw that N-doped carbon surfaces howeds uperiors electivity to H 2 O 2 than pure carbon surface, because the former provides more stable binding sites for hydroperoxyr adical (HOOC).…”

“…By virtue of advanced materialc hemistry,s everal other groupsh ave also reported interesting model catalysts andc learly showed ap otential use of hydrogen spillover for the design of advanced hydrogenation catalysts. [6,7] In this Conceptp aper,w ew ill provide an overview of the recent progress made with these unique encapsulated metal catalysts, which can give new insight into designing advancedh ydroprocessing catalysts with enhanced chemoselectivity and catalyst lifetime.…”

Cutting-Edge Research at the Membrane Center in Kobe University in Japan

“…4. Advanced Membrane and Thin Film Catalyst Group (Prof. S. nishiyama, Associate Prof. Y. ichihashi) the research group studies the application of special membranes with catalytic function to solve environmental and energy problems and to develop industrial chemical processes (2,8).…”