期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 59, 期 49, 页码 21322-21332出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.0c04095
关键词
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资金
- National Natural Science Foundation of China [51601223, 21991091]
- National Key Technologies R&D program of China [2018YFE0118200]
- Shandong Provincial Natural Science Foundation [ZR2017MB003]
- PetroChina Innovation Foundation [2018D-5007-0504]
- Fundamental Research Funds for the Central Universities [17CX05018, 17CX02056, 19CX05001A]
- Sino-French International Laboratory (LIA) Zeolites
- China Scholarship Council
Perovskite-type LaCoO3 catalysts were studied for cyclohexane oxidation with molecular oxygen in a solvent-free system. Catalysts with various lanthanum to cobalt molar ratios were prepared through a modified citric acid procedure and characterized by different techniques. Among all catalysts, the best cyclohexane conversion results (8.3%) with a K/A oil (cyclohexanone and cyclohexanol) selectivity of 90% were obtained over LaCoO3 with a La to Co molar ratio of 1:1. The high catalytic activity on the perovskite-type LaCoO3 catalyst was explored by experimental and theoretical methods. Density functional theory-based calculations clarified the role of La and Co ions in oxygen and cyclohexane adsorption, respectively. The characterization results indicated that a single-phase LaCoO3 perovskite with a dominance of surface Co3+ species and relatively high concentration of adsorbed oxygen species on the catalyst surface enhances the catalytic performance. This study presents insights into the design of a highly active, cost-effective, and green catalyst for cyclohexane partial oxidation.
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