A highly efficient rod-like-CeO₂-supported palladium catalyst for the oxidative carbonylation of glycerol to glycerol carbonate

Abstract

Pd/CeO2-r was prepared by a two-step hydrothermal-impregnation method for oxidative carbonylation of glycerol. It exhibited high activity, and glycerol conversion was 93% and glycerol carbonate selectivity was 98% with a TOF of 1240 h−1 under optimized conditions.

Chemical kinetics and promoted Co-immobilization for efficient catalytic carbonylation of ethylene oxide into methyl 3-hydroxypropionate

“…The much lower H 2 consumption by Co/CNT-C (2,500 μmol/g) than Co/CNT-I (3815 μmol/g) during H 2 -TPR (Figure 5E) further confirmed the accumulation of oxidative Co species in the Co/CNT-I. The combination results of XRD and XPS suggested a higher dispersion of Co particles with more Co 0 sites exposed on the surface, which may correlated with the faster reaction rate via Co/CNT-C samples as reported by many carbonylation research works using supported metal catalysts (Xu et al, 2011;Zhang, 2012;Ibrahim and Denmark, 2018;Wang et al, 2021). The Co/CNT-C was further tested as a recycle catalyst for the EO carbonylation.…”

Sustainable valorisation of renewables through dialkyl carbonates and isopropenyl esters

“…In a recent example, the OCG process was carried out using a rod-like CeO 2 -supported Pd catalyst (Pd/CeO 2 -r) and NaI as a co-catalyst [Scheme 8(a)]. 96 Under optimized conditions, at 140 °C and 50 bar total pressure [ p (O 2 ) = 17 bar; p (CO) = 33 bar], the GC selectivity was 98% at 93% conversion. The redox cycle responsible for the catalytic activity was based on two subsequent oxidations, 2I − → I 2 + 2e − and Pd(0) → Pd 2+ , mediated by O 2 and I 2 , respectively.…”

Efficient and biocompatible new palladium-supported boehmite nanoparticles: synthesis, characterization and application in Suzuki–Miura and Mizoroki–Heck coupling reactions

“…35 The peaks in the areas of 39.75, 46.65, 67.85, 82.19 and 87.45 correspond with reection planes 111, 200, 220, 311 and 222 in the XRD pattern and well show that the palladium zero nanoparticles are stabilized on the boehmite substrate (JCPDS card 46-1043). [36][37][38][39][40][41] The presence of these peaks in the catalysts used in Heck and Suzuki reactions shows that the palladium in the sample has maintained its neutrality aer the catalytic activity. Calculating the size of nanoparticles using Scherer's formula shows that the size of nanoparticles is about 13 nm.…”