Efficient Interfacial Sites between Metallic and Oxidized Cobalt for Propene Hydroformylation
Zhengtian Pu1, Jiankang Zhao1, Haibin Yin1
1Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
This study introduces a novel cobalt catalyst for olefin hydroformylation, offering a cost-effective alternative to rhodium. The catalyst efficiently converts propene using syngas under moderate conditions.
Area of Science:
- Catalysis
- Organometallic Chemistry
- Green Chemistry
Background:
- Rhodium catalysts dominate short olefin hydroformylation.
- High cost and scarcity of rhodium necessitate alternative catalysts.
- Developing non-noble metal catalysts is crucial for sustainable chemistry.
Purpose of the Study:
- To develop an efficient and cost-effective cobalt-based catalyst for propene hydroformylation.
- To investigate the role of interfacial sites in catalytic activity.
- To provide a sustainable alternative to rhodium in hydroformylation.
Main Methods:
- Synthesis of a cobalt-based catalyst with metallic and oxidized cobalt species.
- Hydroformylation of propene using syngas (CO/H2) under moderate pressure.
- Mechanistic studies involving adsorption and energy barrier analysis.
Main Results:
- The cobalt catalyst achieved a high specific activity of 252 mol molCo-1 h-1.
- Optimal performance was observed under 2 bar propene and 40 bar syngas at 160 °C.
- Mechanistic studies revealed that interfacial sites enhance CO and propene adsorption and lower energy barriers for key reactions.
Conclusions:
- The developed cobalt catalyst is highly efficient for propene hydroformylation.
- Interfacial sites between metallic and oxidized cobalt are key to the catalyst's performance.
- This work presents a promising non-noble metal alternative for industrial hydroformylation processes.
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