Pd-Nanocomposites Formed by Calcination of [Pd(2-pymo)(2)](n) Framework as Catalysts of Phenylacetylene Semihydrogenation in Water

摘要

The novel Pd-nanocomposites, fabricated via calcination of the MOF [Pd(2-pymo)(2)](n) (2-pymo=2-pyrimidinolate), were used for the first time in the transfer hydrogenation of phenylacetylene with NaBH4. The presence of Pd NPs or PdO in the studied materials was evidenced by XPRD, Raman spectroscopy, XPS and HR-TEM. Under mild reaction conditions, in water as a solvent, Pd-nanocomposites, Pd/C-PYMO and PdO/Pd/C-PYMO, provided better catalytic results than the pristine [Pd(2-pymo)(2)](n), producing styrene with good selectivity. These two catalysts showed also good durability in subsequent reuses, while the productivity of PdO/C-PYMO decreased after the second run.