Search

The synthesis of phosphine‐based functional covalent organic frameworks (COFs) has attracted great attention recently. Herein, we present two examples of triphenylphosphine‐based COFs (termed P‐COFs) with well‐defined crystalline structures, high specific surface areas, and good thermal stability. Furthermore, rhodium catalysts with these P‐COFs as support material show high turnover frequency for the hydroformylation of olefins, as well as excellent recycling performance. This work not only extends the phosphine‐based COF family, but also demonstrates their application in immobilizing homogeneous metal‐based (e.g. Rh‐phosphine) catalysts for application in heterogeneous catalysis. [ABSTRACT FROM AUTHOR]

The structure and catalytic properties of Pd catalyst supported on the outer surface or inner surface of carbon nanotubes (CNTs) have been investigated by using various experimental techniques combined with acetylene selective hydrogenation tests. It has been shown that Pd/CNTs-out catalyst exhibits higher ethylene selectivity than Pd/CNTs-in catalyst for acetylene selective hydrogenation. The electron interaction between CNTs support and palladium particles is responsible for higher ethylene selectivity over Pd/CNTs-out catalyst. Graphical Abstract: It is found that Pd/CNTs-out catalyst exhibits higher ethylene selectivity than Pd/CNTs-in catalyst for acetylene selective hydrogenation. The electron interaction between CNTs support and palladium particles is responsible for higher ethylene selectivity over Pd/CNTs-out catalyst.[Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR]