Preparation and Catalytic Performance of Carbon Nanotube Supported Palladium Catalyst

Abstract

Two carbon nanotube supported palladium catalysts were prepared using a chemical reduction technique (Pd/CR-CNT) and a conventional impregnation method (Pd/CNT) respectively, and their catalytic performances for Heck reaction were investigated. The catalysts were characterized by TEM and XPS techniques and the products were characterized by 1 H NMR. Research results showed that the (Pd/CR-CNT) catalyst showed a better catalytic activity than the (Pd/CNT) catalyst, owing to better dispersion of palladium nanoparticles and stronger interaction between the active palladium species and carbon nanotube. Meanwhile, the product yield maintained 99.93% of its initial value at five-times re-use, compared with that at the first time use. The catalyst prepared with the chemical reduction method represented a better reusing performance.

Superior Formic Acid Oxidation Using Carbon Nanotube-Supported Palladium Catalysts

“…Decreased interaction strength can cause an increase in the catalytic rate. Similar binding energies have been reported by another group . The binding energy shift is likely due to the electronic properties of the carbon nanotubes as well as their oxophilicity …”

“…Similar binding energies have been reported by another group. 71 The binding energy shift is likely due to the electronic properties of the carbon nanotubes as well as their oxophilicity. 72 Electrochemical Activities of the Pd and Pd-Decorated CNT.…”

Carbon‐Derived Supports for Palladium Nanoparticles as Catalysts for Carbon‐Carbon Bonds Formation

“…The Suzuki reaction of iodobenzene and 4‐iodoanisole with phenylboronic acid was performed with 0.25 mol % of Pd loading in DMF and with Na 2 CO 3 as base at 110 °C during 2 h. Recycling experiments were carried out during five runs without appreciable lowing of yields. In 2010, Chu and co‐workers reported the preparation and catalytic activity of Pd supported on double CNTs in Heck reaction . They used a chemical reduction technique and a conventional impregnation method to generate Pd@CR‐MWCNT and Pd@MWCNT, respectively.…”

“…In 2010, Chu and co-workers reported the preparation and catalytic activity of Pd supported on double CNTs in Heck reaction. [62] They used a chemical reduction technique and a conventional impregnation method to generate Pd@CR-MWCNT and Pd@MWCNT, respectively. The former hybrid material gave slightly better results than the later one for the reaction of bromobenzene with acrylic acid using Et 3 N as base and DMF as solvent at 120°C due to a better dispersion of the Pd NPs.…”

Polylactic Acid Nanofiber Membranes Grafted with Carbon Nanotubes with Enhanced Mechanical and Electrical Properties

“…Since their discovery in 1991, CNTs have been extensively studied because of their unique advantages in terms of large specific surface area, good biocompatibility, high electrical conductivity, excellent thermomechanical properties, and good chemical stability due to their unique structure and high aspect ratio. – Thus, CNTs have been widely applied to a large number of fields, such as advanced composites; – energy storage and management and microelectronics; – chemical processing; – tissue engineering, medicine, and biosensors; – textiles; , aerospace; , and environmental protection . CNTs can be prepared in different ways, such as arc discharge, chemical vapor deposition, the sol–gel method, and laser ablation.…”