Graphene Oxide (GO) Supported Palladium (Pd) Nanocomposites for Enhanced Hydrogenation

Abstract

The present study is an attempt to discover the hydrogen storage capacity of graphene oxide-Palladium (GO-Pd) nanocomposite through Benkeser reaction. A new route has been developed to adsorb hydrogen using GO-Pd as storage medium. Graphite is oxidised using improved Hummer's method (soft chemistry synthetic route) to produce graphene oxide (GO) nanoparticles. GO-Pd composite is synthesized by ultrasonication, chemical treatment with potassium tetrachloropalladate (K 2 PdCl 4) and overnight heat treatment. The prepared GO-Pd nanocomposite is hydrogenated by using lithium, ethylene diamine in argon atmosphere under ambient conditions. The hydrogenated graphene oxide-Palladium (H-GO-Pd) nanocomposites were characterized by scanning electron microscope (SEM), Fourier transform infrared spectra (FTIR) analysis, thermo gravimetric analysis (TGA) and X-ray diffractogram analysis. The FTIR analysis reports that hydrogen is adsorbed at three positions (ortho, meta and para) of graphene. The TGA analysis is used to understand the degradation behaviour of H-GO-Pd nanocomposite. It is to be noted that the degree of hydrogenation (DH) or hydrogen storage of the prepared H-GO-Pd is 17.35 weight %. Although it is not surprising, the DH is quite higher than the previously reported values. Thus graphene oxide supported Palladium nanocomposites is a definite resource for improved hydrogenation than the earlier disclosed materials using graphene.

Activation by O2 of AgxPd1–x Alloy Catalysts for Ethylene Hydrogenation

“…Palladium oxide, PdO, has already been shown to be effective for catalyzing the combustion of organic compounds, , the dimerization of methane, and the methanation of CO 2 . However, to our knowledge, PdO has never explicitly been used for catalytic hydrogenation, despite the widespread use of oxide-supported Pd. − Our results show a clear enhancement of the ethylene hydrogenation activity in the presence of O 2 , even for the pure Pd catalyst. Thus, the results of this work show the potential of using O 2 to modify and activate Pd for catalytic processes involving hydrogenation reactions.…”

Performance Evaluation of the Green Surfactant-Treated Nanofluid in Enhanced Oil Recovery: Dill-Hop Extracts and SiO2/Bentonite Nanocomposites

“…16 On the other hand, the hydrophobic nature of the nanocomposites can alter the wettability of the rock surface toward the water-wet and reduce the capillary forces. 17 Recently, several nanocomposites were evaluated for their potential role in enhancing oil recovery applications, such as Fe 3 O 4 /mineral−soil NCs, 13 polymer nanofibers, 18 polyacrylamide-grafted silica NCs, 19 Fe 3 O 4 @ Chitosan NCs, 20 GO/Pd NCs, 21 TiO 2 /xanthan gum NCs, 23 and nanobentonite. 23 The mentioned studies stated the significant role of the nanomaterials in the interfacial tension (IFT) reduction, wettability alteration, foam stability, and improvement of the oil recovery.…”

Pd@GO catalyzed stereo- and regio-selective addition of arenes to alkynes and synthesis of coumarins via C–H functionalization

“…9 Pd@GO has been used in various other studies, such as gas detection, electrocatalysis, hydrogenation, oxidation, and reduction reactions etc . 10–14 Various coupling reactions are also reported, such as Ullmann, Heck, Sonogashira, and Suzuki-Miyaura coupling reactions, etc . 15–18 However, heterogeneous catalysis for C–H functionalization is currently being explored.…”