期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 10, 期 42, 页码 13991-14000出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.2c04210
关键词
acetylene hydrochlorination; Ru-N active domains; single-site catalysts; improved stability
资金
- National Natural Science Foundation of China [22068031, 21706167]
- 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]
Several single-site catalysts have been synthesized by chelating polyethyleneimine (PEI) with Ru precursors, resulting in durable active sites. The presence of metal and highly electronegative heteroatomic sites enhances the activation ability of reactant molecules. The modified catalyst shows improved stability and catalytic efficiency, making it suitable for industrial applications.
Several single-site catalysts have been synthesized through the chelation of polyethyleneimine (PEI) with Ru precursors because of the lack of durable active sites in Ru catalysts for acetylene hydrochlorination. Proper thermal activation successfully constructed the local active domains of Ru-N. Ru species were stabilized in their active states by coordinating N in PEI with the central atom Ru in the Ru/activated carbon (AC) catalyst. The metal and highly electronegative heteroatomic sites in the Ru-N domains augmented the activation ability of reactant molecules synergistically. The synthetic strategy developed led to the dispersion of active metal at the level of a single site. Additionally, more Ru-N-C interfaces formed after appropriate pyrolysis of the catalyst (Ru/AC@PEI-T), increasing the contact area to reactants and improving the catalytic efficiency. The modified Ru/ AC@PEI catalyst has significantly enhanced catalytic stability over time, allowing for possible industrial applications.
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