Explaining the Size Dependence in Platinum‐Nanoparticle‐Catalyzed Hydrogenation Reactions |
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| Authors: | Licheng Bai Xin Wang Dr. Qiang Chen Yifan Ye Dr. Haoquan Zheng Prof. Jinghua Guo Prof. Yadong Yin Prof. Chuanbo Gao |
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| Affiliation: | 1. Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, Shaanxi, China;2. Department of Chemistry, University of California, Riverside, Riverside, CA, USA;3. School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, China;4. Advanced Light Source Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA;5. Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, Sweden |
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| Abstract: | Hydrogenation reactions are industrially important reactions that typically require unfavorably high H2 pressure and temperature for many functional groups. Herein we reveal surprisingly strong size‐dependent activity of Pt nanoparticles (PtNPs) in catalyzing this reaction. Based on unambiguous spectral analyses, the size effect has been rationalized by the size‐dependent d‐band electron structure of the PtNPs. This understanding enables production of a catalyst with size of 1.2 nm, which shows a sixfold increase in turnover frequency and 28‐fold increase in mass activity in the regioselective hydrogenation of quinoline, compared with PtNPs of 5.3 nm, allowing the reaction to proceed under ambient conditions with unprecedentedly high reaction rates. The size effect and the synthesis strategy developed herein may provide a general methodology in the design of metal‐nanoparticle‐based catalysts for a broad range of organic syntheses. |
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| Keywords: | d-band electron structure heterogeneous catalysis hydrogenation reactions platinum nanoparticles size effects |
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