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A Single-Atom Manipulation Approach for Synthesis of Atomically Mixed Nanoalloys as Efficient Catalysts |
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| Authors: | Xuan Zhou Dr Kai Li Yunxiang Lin Prof Li Song Jincheng Liu Yu Liu Lingling Zhang Prof Zhijian Wu Prof Shuyan Song Prof Jun Li Prof Hongjie Zhang |
| Institution: | 1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China
School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026 China These authors contributed equally to this work.;2. National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, 230026 China These authors contributed equally to this work.;3. National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, 230026 China;4. Department of Chemistry, Tsinghua University, Beijing, 100084 China;5. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026 China;6. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China;7. Department of Chemistry, Tsinghua University, Beijing, 100084 China Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055 China;8. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026 China Department of Chemistry, Tsinghua University, Beijing, 100084 China |
| Abstract: | Synthesis of well-defined atomically mixed alloy nanoparticles on desired substrates is an ultimate goal for their practical application. Herein we report a general approach for preparing atomically mixed AuPt, AuPd, PtPd, AuPtPd NAs(nanoalloys) through single-atom level manipulation. By utilizing the ubiquitous tendency of aggregation of single atoms into nanoparticles at elevated temperatures, we have synthesized nanoalloys on a solid solvent with CeO2 as a carrier and transition-metal single atoms as an intermediate state. The supported nanoalloys/CeO2 with ultra-low noble metal content (containing 0.2 wt % Au and 0.2 wt % Pt) exhibit enhanced catalytic performance towards complete CO oxidation at room temperature and remarkable thermostability. This work provides a general strategy for facile and rapid synthesis of well-defined atomically mixed nanoalloys that can be applied for a range of emerging techniques. |
| Keywords: | atomic mixing CeO2 CO oxidation nanoalloy single-atom catalyst |