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

Abstract

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 NaBH 4 . 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.

Multivariate Porphyrinic MOFs as Precursors of Nanoalloy Catalysts for Efficient Dehydrogenation of Hydrogen Molecular Carriers

“…On the contrary, a partial BE upshift is observed in the overlapped Zr 3p − Pd 3d spectrum for red.-Pd−Ni/ZrO 2 , compared to monometallic red.-Pd/ZrO 2 , clearly visible in Figure S13. This BE upshifts are often associated with Pd oxides species, 42 but the absence of these in the PXRD data suggest electron donation from Pd δ+ to NiO species, as previously observed for Pd−Ni alloys. 43…”

New Palladium – ZrO2 Nano‐Architectures from Thermal Transformation of UiO‐66‐NH2 for Carbonylative Suzuki and Hydrogenation Reactions

“…The Raman spectra (Figure S2A-B) for Pd-2 and Pd-3 composites revealed the characteristic peak centered at 641 cm À 1 assigned to the first-order scattering from the Raman-active B1 g phonon mode for PdO. [17] For Pd-4 (Figure S2C), two prominent peaks at 1355 and 1570 cm À 1 correspond to the D band of the disordered carbon and the G band of the graphitic carbon. [18] The surface area of all composites was explored by the N 2 adsorption-desorption technique, and the data were shown in Figure S3 and Table S1.…”

[Pd(2‐pymo)2]n/Al2O3 as MOF Single Site Catalyst for the Selective Hydrogenation of Acetylene**

“…[2,4,11] Here metal-organic frameworks (MOFs) with their chemical versatility, high surface area and pore size variability, offer the possibility of directing selectivity and enhance the activity of the selective acetylene hydrogenation. [13][14][15] Recent studies on this reaction with specially designed MOFs for the separation of acetylene [16][17][18][19][20][21] and MOFs as catalysts, e. g. with open Fe III sites, [22] show promising results. Research on palladium catalysts supported on MOF structures has also been in the focus with Pd supported on MOF-5, [23] Pd/UiO-67, [24] Pd@Mil-53 [25] or Pd@ZIF-L. [26] To the best of our knowledge, no studies on acetylene hydrogenation with favourable Pd 2 + nodes as part of a MOF itself have been reported, yet.…”