Effective Hydrodechlorination of 4-Chlorophenol Over Pd Deposited on Multiwall Carbon Nanotubes

Abstract

Multiwall carbon nanotubes (MWCNTs) supported Pd nanoparticles were prepared by impregnation method and characterized by TEM, XRD, XPS, and FT-IR. The as-prepared catalyst Pd/MWCNTs exhibited excellent catalytic property for the hydrodechlorination (HDC) of 4-chlorophenol (4-CP) in aqueous medium without any additives under mild conditions. The results indicated that the choice of support and the introduction of metal ions played a significant role in the catalytic property for HDC of 4-CP. The high catalytic performance of Pd/MWCNTs was attributed to the highly dispersed Pd nanoparticles on the support MWCNTs and the interaction between support and metal actives.

Aqueous-phase hydrodechlorination and further hydrogenation of chlorophenols to cyclohexanone in water over palladium nanoparticles modified dendritic mesoporous silica nanospheres catalyst

“…This is in agreement with other researchers' work under low Pd dosage and low temperature. 21,30,[32][33][34] When increasing the catalyst dosage from 10 mg to 20 mg and the reaction temperature from 20 C to 40 C or 65 C, phenol and further hydrogenation products are detected in the process of HDC of 4-CP. This result indicates that the amount of activity phase (Pd) and the temperature have a strong effect on the selectivity of the experiment (Fig.…”

Catalysis of the hydro-dechlorination of 4-chlorophenol by Pd(0)-modified MCM-48 mesoporous microspheres with an ultra-high surface area

“…This result was in agreement with a previous study using the same reaction system in which phenol was detected as the major product. [32][33][34][35][36] The catalytic properties of the Pd-M48N catalysts were investigated using the HDC of 4-CP as a model reaction. This has been proved to be an effective way to evaluate the removal efficiency of noble metal nanocatalysts.…”