Facile Preparation of Pd/UiO-66-v for the Conversion of Furfuryl Alcohol to Tetrahydrofurfuryl Alcohol under Mild Conditions in Water

Abstract

The hydrogenation of furan ring in the biomass-derived furans is of great importance for the conversion of biomass to valuable chemicals. Fabrication of high activity and selectivity catalyst for this hydrogenation under mild conditions was one of the focuses of this research. In this manuscript, UiO-66-v, in which vinyl bonded to the benzene ring, was first prepared. Then, the uniformly distributed vinyl was used as the reductant for the preparation of Pd/UiO-66-v. The catalyst was characterized by X-ray diffraction, thermogravimetric, N2 physical adsorption/desorption, X-ray photoelectron spectroscopy, scanning electron microscope, transmission electron microscopy, energy dispersive spectrometer elemental mappings, and inductively coupled plasma atomic emission spectroscopy to find the Pd/UiO-66-v had a narrow palladium nanoparticles size of 3–5 nm and maintained the structure and thermal stability of UiO-66-v. The Pd/UiO-66-v was used for the hydrogenation of furfuryl alcohol to tetrahydrofurfuryl alcohol in water. 99% conversion of furfuryl alcohol was obtained with 90% selectivity to tetrahydrofurfuryl alcohol after reacted at 0.5 MPa H2, 303 K for 12 h. The Pd/UiO-66-v was proved to be effective for the hydrogenation of furan ring in furans and could be used for at least five times.

Preparation of 1-Hydroxy-2,5-hexanedione from HMF by the Combination of Commercial Pd/C and Acetic Acid

“…After the deconvolution process, the high-resolution spectrum of Pd 3d for fresh Pd/C showed binding energy peaks at 335.5 and 337.3 eV for Pd 3d 5/2 and 340.9 and 342.6 eV for Pd 3d 3/2 (Figure 5b). The 335.5 and 340.9 eV results can be attributed to Pd (0), while the other two peaks are the signal of Pd (II) [58][59][60][61]. The Pd (II) should generate in the passivation process of Pd/C.…”

Cu@Pd/C with Controllable Pd Dispersion as a Highly Efficient Catalyst for Hydrogen Evolution from Ammonia Borane

“…As a result, how to control the distribution of noble metals on the surface of non-noble metals needs further consideration. In this manuscript, based on our previous work on the preparation of Pd catalysts [ 73 , 74 , 75 , 76 , 77 , 78 ], we synthesized Cu@Pd/C with controllable Pd dispersion through the galvanic reduction method. The dispersion of Pd atoms on the surface of Cu nanoparticles was regulated by partial oxidation of the surface of Cu nanoparticles.…”

Preparation of PdAuCu/C as a Highly Active Catalyst for the Reduction of 4‐Nitrophenol by Controlling the Deposition of Noble Metals

“…The high‐resolution spectrum of Pd for PdCu/C and PdAuCu/C had two peaks at 341.0 eV and 335.7 eV, respectively (Figure 2b). The two peaks correspond to the 3d 3/2 and 3d 5/2 of metallic Pd [52–59] . The spectrum of Au showed binding energy peaks for metallic Au at 87.5 eV and 83.8 eV (Figure 2c).…”

“…The mass spectra were collected on a Shimadzu GC/MS‐TQ8040 equipped with an InerCap 17MS column (30 m×0.25 mm×0.25 μm). The analysis procedure has been reported previously [56] . The UV‐Vis spectra were collected on Agilent Cary 60 UV‐Vis spectrophotometer.…”

“…The two peaks correspond to the 3d 3/2 and 3d 5/2 of metallic Pd. [52][53][54][55][56][57][58][59] The spectrum of Au showed binding energy peaks for metallic Au at 87.5 eV and 83.8 eV ( Figure 2c). These prove that the Cu was an effective reductant for the production of metallic Pd and Au.…”