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This thesis focuses on the controlled synthesis of Pt–Ni bimetallic nanoparticles and the study of their catalytic properties. It discusses in detail the nucleation mechanism and the growth process of bimetallic systems, which is vital for a deeper understanding of the design of bimetallic catalysts. The author presents four pioneering studies: (1) syntheses of water-soluble octahedral, truncated octahedral, and cubic Pt–Ni nanocrystals and the study of their structure-activity relationship in model hydrogenation reactions; (2) a strategy for designing a concave Pt–Ni alloy using controllable chemical etching; (3) defect-dominated shape recovery of nanocrystals, which is a new synthesis strategy for trimetallic catalysts; (4) a sophisticated construction of Au islands on Pt−Ni, which is an ideal trimetallic nanoframe catalyst. This thesis inspires researchers working in materials, catalysis as well as other interdisciplinary areas. 

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Area of work: synthesis of bimetallic nanocrystals and study of their catalytic properties Degree: 9/2009-7/2014 Ph. D of Chemistry, Tsinghua University 9/2005-7/2009 B.S. of Chemistry, Tsinghua University Awards: 2014 Honor of Excellent thesis in Tsinghua University 2014 Honor of Excellent graduate student in Beijing 2014 Principal Tsinghua scholarship (10 persons each year) 2014 and 2013: National Scholarship 2013 Best Poster Prize on Sino-US nano symposium 2013 JiaXi Lu Scholarship 2012 Aoqing Tang Scholarship 2012 The Ministry of Education Academic Newcomer Award Publications: [1] Wu Y E; Wang D S; Li Y D. Nanocrystals from Solutions: Catalysts. Chem. Soc. Rev. 2014, 43: 2112-2124. [2] Wu Y E; Wang D S; Zhou G; Yu R; Chen C; Li Y D. Sophisticated Construction of Au Islands on Pt Ni: An Ideal Trimetallic Nanoframe Catalyst. J. Am. Chem. Soc. 2014, 136, (33): 11594-11597. [3] Wu Y E; Wang D S; Chen X B, Zhou G; Yu R; Li Y D. Defect-Dominated Shape Recovery of Nanocrystals: A New Strategy for Trimetallic Catalysts. J. Am. Chem. Soc. 2013, 135, (33): 12220-12223. [4] Wu Y E; Wang D S; Niu Z Q; Chen P C; Zhou G; Li Y D. A Strategy for Designing a Concave Pt Ni Alloy through Controllable Chemical Etching. Angew. Chem. Int. Edit. 2012, 51, (50): 12524-12528. [5] Wu Y E; Cai S F; Wang D S; He W; Li Y D. Syntheses of Water-Soluble Octahedral, Truncated Octahedral, and Cubic Pt Ni Nanocrystals and Their Structure Activity Study in Model Hydrogenation Reactions. J. Am. Chem. Soc. 2012, 134, (21): 8975-8981. [6] Wu Y E; Wang D S; Zhao P; Niu Z Q; Peng Q; Li Y D. Monodispersed Pd-Ni Nanoparticles: Composition Control Synthesis and Catalytic Properties in the Miyaura-Suzuki Reaction. Inorg. Chem. 2011, 50, (6): 2046-2048.

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