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146 Chapter 5
5.6 Conclusions
In summary, via one-pot synthesis crystalline porous Pd@[Cu3-xPdx(BTC)2]n MOFs with
various doping levels of Pd have been successfully obtained. On the basis of entire
experimental data, structural incorporation of Pd 2+ serving as frameworks-nodes (within
Cu-Pd or/and Pd-Pd paddlewheels) as well as Pd 0 NPs dispersion in the framework of
HKUST-1 are concluded. To best of our knowledge, it is the singular case of MOFs bearing
both Pd 2+ -paddlewheels and Pd NPs known so far. Curiously, certain dependency of the
crystals morphology of Cu/Pd-BTC and extent of relative ratio of Pd-NPs and Pd 2+ -nodes
on the employed Pd-precursors could be traced. Moreover, distinct Pd sites, especially
Pd 2+ /M-CUS considerably enhances MOFs performance in the aqueous-phase
hydrogenation of PNP to PAP comparing to the “Pd-free” Cu-BTC catalysts, which affords
a perspective way to tune their catalytic activity. Furthermore, a synthesis of HKUST-1
analogs excluding Pd 0 formation and featuring exclusive Pd 2+ /Cu 2+ mixed-metal PWs
would lead to highly active catalysts.