Citation: Jiangyong Liu, Tingting Chen, Panming Jian, Lixia Wang. Hierarchical 0D/2D Co₃O₄ hybrids rich in oxygen vacancies as catalysts towards styrene epoxidation reaction[J]. Chinese Journal of Catalysis, ;2018, 39(12): 1942-1950. doi: 10.1016/S1872-2067(18)63133-X shu

Hierarchical 0D/2D Co₃O₄ hybrids rich in oxygen vacancies as catalysts towards styrene epoxidation reaction

School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, Jiangsu, China

Received Date: 4 June 2018
Revised Date: 3 July 2018

Fund Project: This work was supported by the Natural Science Foundation for High Education of Jiangsu Province (17KJB530011), the Science and Technology Innovation Foundation of Yangzhou University (2017CXJ015), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

Great efforts have been devoted to the developing of simple, efficient and stable heterogeneous catalysts for the styrene epoxidation reaction (SER). Metal oxides can be of industrial importance by offering an economic and green route for selectively converting styrene into styrene oxide (SO). Herein, by treating the pristine porous 2D Co₃O₄ sheets with NaBH₄ solution, a novel hierarchical structure, i.e., 0D Co₃O₄ nanoparticles decorated on 2D porous Co₃O₄ sheets, was obtained. This simple solution reduction strategy not only realizes the morphology evolution, but also induces the modification of the valence states of metal ions and the simultaneous generation of surface oxygen vacancies. The hierarchical 0D/2D Co₃O₄ hybrids rich in oxygen vacancies (OV-Co₃O₄) exhibit a much better SER performance than the Co₃O₄ sheets (P-Co₃O₄), with the yield of SO more than doubled. The excellent catalytic performance of the OV-Co₃O₄ can be ascribed to the synergistic effects regarding the hierarchical porous structure, the modification of surface chemical composition and the creation of surface oxygen vacancies.
- Co₃O₄,
- Reduction,
- Oxygen vacancies,
- Styrene,
- Epoxidation
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Hierarchical 0D/2D Co₃O₄ hybrids rich in oxygen vacancies as catalysts towards styrene epoxidation reaction