A study on the rules of ligands in highly efficient Ru–amide/AC catalysts for acetylene hydrochlorination

Abstract

To explore the role of substituents on ligands on the modification of metal catalysts, a series of Ru-amide/AC catalysts are synthesized with various amide ligands derived from formamide and assessed...

Construction of Highly Dispersed Cu–P/Cl Active Sites Using Methyldiphenyloxophosphine for Efficient Acetylene Hydrochlorination

“…Moreover, the metal catalytic active centers formed by the interaction between the ligands and the metal precursor also increased the VCM selectivity of the catalyst from 98% to about 99% (Figure b). The ligand’s ability to enhance the catalytic activity followed the order MDPO > MMDPO > DPC > DPA > ODPHA, which indicates that the presence of electron-withdrawing or electron-donating groups and the steric hindrance affected the coordination ability and electronic properties of the central Cu atom (Figure S1), with the concomitant effect on the adsorption and activation of reactant molecules by the catalyst . The effect of the electronic structure of the ligand on the catalytic activity requires further investigation.…”

“…The ligand's ability to enhance the catalytic activity followed the order MDPO > MMDPO > DPC > DPA > ODPHA, which indicates that the presence of electron-withdrawing or electron-donating groups and the steric hindrance affected the coordination ability and electronic properties of the central Cu atom (Figure S1), with the concomitant effect on the adsorption and activation of reactant molecules by the catalyst. 43 The effect of the electronic structure of the ligand on the catalytic activity requires further investigation. Furthermore, the optimal ligand dosage was screened.…”

Competing on the same stage: Ru-based catalysts modified by basic ligands and organic chlorine salts for acetylene hydrochlorination

“…Consistent with many previous studies, Ru n + ( n ≥ 3) played a more important role in catalyzing the hydrochlorination of acetylene. 14,16 To roughly assess the coking amount of each catalyst in a 24 h reaction, low-temperature N 2 adsorption–desorption experiments were performed, which can be visualized in Table 1 and Fig. S3 †.…”

“…As shown in Fig. 1 14,16 To roughly assess the coking amount of each catalyst in a 24 h reaction, low-temperature N 2 adsorptiondesorption experiments were performed, which can be visualized in Table 1 and Fig. S3.…”

“…Recently, multiple amide ligands have been studied and a rule that substituents with strong electron-donating ability can enhance the modification effect of amide ligands is presented. 16 Despite many efficient ligands developed, the search for effective ligands, however, still remains challenging. Moreover, for ligands that can be converted to organic chlorine salts (i.e., ILs), the difference between these ligands and the corresponding organic chlorine salts in modifying catalysts for acetylene hydrochlorination has never been studied up to now.…”