title: Enhanced CO oxidation on CeO2/Co3O4nanojunctions derived from annealing of metal organic frameworks.
abstract: The interface of nanojunctions plays an important role in the performance of heterogeneous catalysts. However, it is highly challenging to construct nanojunctions which are usually prepared by complex multistep processes. Metal-organic frameworks (MOFs), with designable metal centers and tunable organic ligands, are promising precursors for the one-step synthesis of nanojunctions. Herein, we prepared porous CeO2/Co3O4nanojunctions by direct annealing of MOFs in air. These unique nanojunctions exhibit remarkable catalytic activity for CO oxidation, which can achieve complete oxidization of CO to CO2at 110 °C. In contrast, the temperature required for 100% CO oxidation is 190 °C for pure Co3O4. Moreover, the nanojunctions can maintain complete CO conversion after 16 h at 110 °C. Density functional theory calculations revealed that the enhancement in the catalytic activity of CeO2/Co3O4nanojunctions can be attributed to the charge transfer through the interfaces of the nanojunctions.
authors.affiliation: Department of Materials Science & Engineering, Hefei National Laboratory for Physical Science at Microscale & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, China. cqw@ustc.edu.cn.
authors.forename: Changlai
authors.initials: C
authors.lastname: Wang
authors.affiliation: Department of Materials Science & Engineering, Hefei National Laboratory for Physical Science at Microscale & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, China. cqw@ustc.edu.cn.
authors.forename: Dongdong
authors.initials: D
authors.lastname: Wang
authors.affiliation: Department of Materials Science & Engineering, Hefei National Laboratory for Physical Science at Microscale & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, China. cqw@ustc.edu.cn.
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Department of Materials Science & Engineering, Hefei National Laboratory for Physical Science at Microscale & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, China. cqw@ustc.edu.cn.
authors.forename: Ren
authors.initials: R
authors.lastname: Li
authors.affiliation: Department of Polymer Science & Engineering, University of Science and Technology of China, Hefei 230031, China. changle@ustc.edu.cn.
authors.forename: Changle
authors.initials: C
authors.lastname: Chen
authors.affiliation: Department of Materials Science & Engineering, Hefei National Laboratory for Physical Science at Microscale & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, China. cqw@ustc.edu.cn and High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
authors.forename: Qianwang
authors.initials: Q
authors.lastname: Chen