期刊
APPLIED CATALYSIS A-GENERAL
卷 592, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcata.2020.117431
关键词
Ru-based catalysts; Azole ligands; Coordination; Enhanced performance
资金
- National Natural Science Foundation of China [21706167, 21776179]
- College Young Teachers Fund of the Fok Ying Tung Education Foundation [161108]
- Program for Young and Middle-aged Scientific and Technological Innovation Leaders in Bingtuan [2018CB013]
- Shihezi university Young Innovative Talents Training Program Project [CXRC201803]
- Major Science and Technology Project of Xinjiang Bingtuan [2017AA007/01]
- Start-Up Foundation for Young Scientists of Shihezi University [RCSX201728]
- China Scholarship Council -Special Program for Talent Training in Western China [201805215035]
Supported Ru-L-x/AC catalysts were synthesised by coordinating a Ru precursor with several azole ligands and assessed for acetylene hydrochlorination. The results demonstrated that the coordinated Ru-imidazole/AC (Ru-L-1/AC) catalyst exhibited superior catalytic activity compared to that of catalysts coordinated with other ligands. In addition, the substitution of hydrogen on the imidazole ring by electron-donating substituents further improved the catalytic performance. Specifically, the coordination between the ruthenium precursor and heteroatom in the ligands, which contain a conjugated structure and an electron-donating substituent, promoted the transfer of electrons from the heteroatom to Ru cation and augmented the electron cloud density around the active centres, which helps stabilise high-valence Ru and produce more active Run+ species. In addition, the coordination contributed to the anchoring and dispersion of active species, which improved the catalytic hydrochlorination of acetylene. Thus, the as-designed Ru-1-isopropyl imidazole/AC (Ru-L-8/AC) catalyst exhibits a superior performance and good application prospect.
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