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Tuff WJ, Hughes RA, Golze SD, Neretina S. Ion Beam Milling as a Symmetry-Breaking Control in the Synthesis of Periodic Arrays of Identically Aligned Bimetallic Janus Nanocrystals. ACS NANO 2023; 17:4050-4061. [PMID: 36799807 DOI: 10.1021/acsnano.3c00149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Bimetallic Janus nanostructures represent a highly functional class of nanomaterials due to important physicochemical properties stemming from the union of two chemically distinct metal segments where each maintains a partially exposed surface. Essential to their synthesis is the incorporation of a symmetry-breaking control that is able to induce the regioselective deposition of a secondary metal onto a preexisting nanostructure even though such depositions are, more often than not, in opposition to the innate tendencies of heterogeneous growth modes. Numerous symmetry-breaking controls have been forwarded but the ensuing Janus structure syntheses have not yet achieved anywhere near the same level of control over nanostructure size, shape, and composition as their core-shell and single-element counterparts. Herein, a collimated ion beam is demonstrated as a symmetry-breaking control that allows for the selective removal of a passivating oxide shell from one side of a metal nanostructure to create a configuration that is transformable into a substrate-bound Au-Ag Janus nanostructure. Two different modalities are demonstrated for achieving Janus structures where in one case the oxide dissolves in the growth solution while in the other it remains affixed to form a three-component system. The devised procedures distinguish themselves in their ability to realize complex Janus architectures arranged in periodic arrays where each structure has the same alignment relative to the underlying substrate. The work, hence, provides an avenue for forming precisely tailored Janus structures and, in a broader sense, advances the use of oxides as an effective means for directing nanometal syntheses.
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Affiliation(s)
- Walker J Tuff
- College of Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Robert A Hughes
- College of Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Spencer D Golze
- College of Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Svetlana Neretina
- College of Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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2
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Fahes A, Naciri AE, Navvabpour M, Shoker MB, Jradi S, Akil S. Anisotropic Ag@Au architectures through real-time surface-based strategy of synthesis: Large-area enhanced nanosensors. SENSING AND BIO-SENSING RESEARCH 2022. [DOI: 10.1016/j.sbsr.2022.100528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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3
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Vafaeezadeh M, Thiel WR. Task-Specific Janus Materials in Heterogeneous Catalysis. Angew Chem Int Ed Engl 2022; 61:e202206403. [PMID: 35670287 PMCID: PMC9804448 DOI: 10.1002/anie.202206403] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Indexed: 01/05/2023]
Abstract
Janus materials are anisotropic nano- and microarchitectures with two different faces consisting of distinguishable or opposite physicochemical properties. In parallel with the discovery of new methods for the fabrication of these materials, decisive progress has been made in their application, for example, in biological science, catalysis, pharmaceuticals, and, more recently, in battery technology. This Minireview systematically covers recent and significant achievements in the application of task-specific Janus nanomaterials as heterogeneous catalysts in various types of chemical reactions, including reduction, oxidative desulfurization and dye degradation, asymmetric catalysis, biomass transformation, cascade reactions, oxidation, transition-metal-catalyzed cross-coupling reactions, electro- and photocatalytic reactions, as well as gas-phase reactions. Finally, an outlook on possible future applications is given.
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Affiliation(s)
- Majid Vafaeezadeh
- Fachbereich ChemieTechnische Universität KaiserslauternErwin-Schrödinger-Strasse 5467663KaiserslauternGermany
| | - Werner R. Thiel
- Fachbereich ChemieTechnische Universität KaiserslauternErwin-Schrödinger-Strasse 5467663KaiserslauternGermany
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Vafaeezadeh M, Thiel WR. Task‐Specific Janus Materials in Heterogeneous Catalysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Majid Vafaeezadeh
- Technische Universitat Kaiserslautern Chemistry Erwin-Schrödinger-Str. 54 67663 Kaiserslautern GERMANY
| | - Werner R. Thiel
- Kaiserslautern University of Technology: Technische Universitat Kaiserslautern Chemistry Erwin-Schrödinger-Str. 54 67663 Kaiserslautern GERMANY
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Qiu J, Chen Z, Chi M, Xia Y. Swelling-Induced Symmetry Breaking: A Versatile Approach to the Scalable Production of Colloidal Particles with a Janus Structure. Angew Chem Int Ed Engl 2021; 60:12980-12984. [PMID: 33822452 DOI: 10.1002/anie.202102164] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/19/2021] [Indexed: 11/08/2022]
Abstract
Janus particles are widely sought for applications related to colloidal assembly, stabilization of emulsions, and development of active colloids, among others. Here we report a versatile route to the fabrication of well-controlled Janus particles by simply breaking the symmetry of spherical particles with swelling. When a polystyrene (PS) sphere covered by a rigid shell made of silica or polydopamine is exposed to a good solvent for PS, a gradually increased pressure will be created inside the shell. If the pressure becomes high enough to poke a hole in the shell, the spherical symmetry will break while pushing out the swollen PS through the opening to generate a Janus particle comprised of two distinct components. One of the components is made of PS and its size is controlled by the extent of swelling. The other component is comprised of the rigid shell and remaining PS, with its overall diameter determined by the original PS sphere and the rigid shell. This solution-based route holds promises for the scalable production of complex Janus particles with a variety of compositions and in large quantities.
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Affiliation(s)
- Jichuan Qiu
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, 30332, USA
| | - Zitao Chen
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, 30332, USA
| | - Miaofang Chi
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, USA
| | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, 30332, USA.,School of Chemistry and Biochemistry, School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA
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6
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Qiu J, Chen Z, Chi M, Xia Y. Swelling‐Induced Symmetry Breaking: A Versatile Approach to the Scalable Production of Colloidal Particles with a Janus Structure. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102164] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jichuan Qiu
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta Georgia 30332 USA
| | - Zitao Chen
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta Georgia 30332 USA
| | - Miaofang Chi
- Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA
| | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta Georgia 30332 USA
- School of Chemistry and Biochemistry School of Chemical and Biomolecular Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA
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Zhu J, Xu L, Lyu Z, Xie M, Chen R, Jin W, Mavrikakis M, Xia Y. Janus Nanocages of Platinum-Group Metals and Their Use as Effective Dual-Electrocatalysts. Angew Chem Int Ed Engl 2021; 60:10384-10392. [PMID: 33600031 DOI: 10.1002/anie.202102275] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Indexed: 11/07/2022]
Abstract
Janus nanocages with distinctive platinum-group metals on the outer and inner surfaces can naturally catalyze at least two different reactions. Here we report a general method based on successive deposition and then selective etching for the facile synthesis of such nanocages. We have fabricated 11 different types of Janus nanocages characterized by a uniform size and well-defined {100} facets, together with porous, ultrathin, asymmetric walls up to 1.6 nm thick. When tested as dual-electrocatalysts toward oxygen reduction and evolution reactions, the Janus nanocages based on Pt and Ir exhibited superior activities depending on the thickness and relative position of the metal layer. Density functional theory studies suggest that the alloy composition and surface structure of the nanocages both play important roles in enhancing the electrocatalytic activities by modulating the stability of key reaction intermediates.
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Affiliation(s)
- Jiawei Zhu
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA.,State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu, 211816, P. R. China.,Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
| | - Lang Xu
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Zhiheng Lyu
- School of Chemistry and Biochemistry, School of Chemical and Bimolecular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Minghao Xie
- School of Chemistry and Biochemistry, School of Chemical and Bimolecular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Ruhui Chen
- School of Chemistry and Biochemistry, School of Chemical and Bimolecular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Wanqin Jin
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu, 211816, P. R. China
| | - Manos Mavrikakis
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA.,School of Chemistry and Biochemistry, School of Chemical and Bimolecular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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Zhu J, Xu L, Lyu Z, Xie M, Chen R, Jin W, Mavrikakis M, Xia Y. Janus Nanocages of Platinum‐Group Metals and Their Use as Effective Dual‐Electrocatalysts. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102275] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jiawei Zhu
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 USA
- State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Nanjing Jiangsu 211816 P. R. China
- Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University Wuxi Jiangsu 214122 P. R. China
| | - Lang Xu
- Department of Chemical and Biological Engineering University of Wisconsin-Madison Madison WI 53706 USA
| | - Zhiheng Lyu
- School of Chemistry and Biochemistry School of Chemical and Bimolecular Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Minghao Xie
- School of Chemistry and Biochemistry School of Chemical and Bimolecular Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Ruhui Chen
- School of Chemistry and Biochemistry School of Chemical and Bimolecular Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Wanqin Jin
- State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Nanjing Jiangsu 211816 P. R. China
| | - Manos Mavrikakis
- Department of Chemical and Biological Engineering University of Wisconsin-Madison Madison WI 53706 USA
| | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 USA
- School of Chemistry and Biochemistry School of Chemical and Bimolecular Engineering Georgia Institute of Technology Atlanta GA 30332 USA
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Bai L, Ouyang Y, Song J, Xu Z, Liu W, Hu J, Wang Y, Yuan F. Synthesis of Metallic Nanocrystals: From Noble Metals to Base Metals. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E1497. [PMID: 31071982 PMCID: PMC6539706 DOI: 10.3390/ma12091497] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 05/03/2019] [Accepted: 05/03/2019] [Indexed: 11/17/2022]
Abstract
Metallic nanocrystals exhibit superior properties to their bulk counterparts because of the reduced sizes, diverse morphologies, and controllable exposed crystal facets. Therefore, the fabrication of metal nanocrystals and the adjustment of their properties for different applications have attracted wide attention. One of the typical examples is the fabrication of nanocrystals encased with high-index facets, and research on their magnified catalytic activities and selections. Great accomplishment has been achieved within the field of noble metals such as Pd, Pt, Ag, and Au. However, it remains challenging in the fabrication of base metal nanocrystals such as Ni, Cu, and Co with various structures, shapes, and sizes. In this paper, the synthesis of metal nanocrystals is reviewed. An introduction is briefly given to the metal nanocrystals and the importance of synthesis, and then commonly used synthesis methods for metallic nanocrystals are summarized, followed by specific examples of metal nanocrystals including noble metals, alloys, and base metals. The synthesis of base metal nanocrystals is far from satisfactory compared to the tremendous success achieved in noble metals. Afterwards, we present a discussion on specific synthesis methods suitable for base metals, including seed-mediated growth, ligand control, oriented attachment, chemical etching, and Oswald ripening, based on the comprehensive consideration of thermodynamics, kinetics, and physical restrictions. At the end, conclusions are drawn through the prospect of the future development direction.
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Affiliation(s)
- Liuyang Bai
- Zhumadian Academy of Industry Innovation and Development, Huanghuai University, Zhumadian 463000, China.
- State Key Laboratory of Multi-Phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
| | - Yuge Ouyang
- State Key Laboratory of Multi-Phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
| | - Jun Song
- Zhumadian Academy of Industry Innovation and Development, Huanghuai University, Zhumadian 463000, China.
| | - Zhi Xu
- Zhumadian Academy of Industry Innovation and Development, Huanghuai University, Zhumadian 463000, China.
| | - Wenfu Liu
- Department of Mechanical and Energy Engineering, Huanghuai University, Zhumadian 463000, China.
| | - Jingyu Hu
- Department of Mechanical and Energy Engineering, Huanghuai University, Zhumadian 463000, China.
| | - Yinling Wang
- Department of Mechanical and Energy Engineering, Huanghuai University, Zhumadian 463000, China.
| | - Fangli Yuan
- State Key Laboratory of Multi-Phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
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Affiliation(s)
- Zhen Zhou
- Department of National Defense Architectural Planning and Environment Engineering; Logistical Engineering University; 401311 Chongqing China
- State Key Laboratory of Environmental Chemistry and Ecotoxicology; Research Center for Eco-Environmental Sciences; Chinese Academy of Sciences; 100085 Beijing China
| | - Yaqin Yu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology; Research Center for Eco-Environmental Sciences; Chinese Academy of Sciences; 100085 Beijing China
- University of Chinese Academy of Sciences; 100049 Beijing China
| | - Zhaoxia Ding
- Department of National Defense Architectural Planning and Environment Engineering; Logistical Engineering University; 401311 Chongqing China
| | - Meimei Zuo
- Department of National Defense Architectural Planning and Environment Engineering; Logistical Engineering University; 401311 Chongqing China
| | - Chuanyong Jing
- State Key Laboratory of Environmental Chemistry and Ecotoxicology; Research Center for Eco-Environmental Sciences; Chinese Academy of Sciences; 100085 Beijing China
- University of Chinese Academy of Sciences; 100049 Beijing China
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Xia Y, Gilroy KD, Peng H, Xia X. Keimvermitteltes Wachstum kolloidaler Metallnanokristalle. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604731] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 USA
- School of Chemistry and Biochemistry School of Chemical and Biomolecular Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Kyle D. Gilroy
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 USA
| | - Hsin‐Chieh Peng
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 USA
| | - Xiaohu Xia
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 USA
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12
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Xia Y, Gilroy KD, Peng HC, Xia X. Seed-Mediated Growth of Colloidal Metal Nanocrystals. Angew Chem Int Ed Engl 2016; 56:60-95. [PMID: 27966807 DOI: 10.1002/anie.201604731] [Citation(s) in RCA: 355] [Impact Index Per Article: 44.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Revised: 06/18/2016] [Indexed: 11/08/2022]
Abstract
Seed-mediated growth is a powerful and versatile approach for the synthesis of colloidal metal nanocrystals. The vast allure of this approach mainly stems from the staggering degree of control one can achieve over the size, shape, composition, and structure of nanocrystals. These parameters not only control the properties of nanocrystals but also determine their relevance to, and performance in, various applications. The ingenuity and artistry inherent to seed-mediated growth offer extensive promise, enhancing a number of existing applications and opening the door to new developments. This Review demonstrates how the diversity of metal nanocrystals can be expanded with endless opportunities by using seeds with well-defined and controllable internal structures in conjunction with a proper combination of capping agent and reduction kinetics. New capabilities and future directions are also highlighted.
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Affiliation(s)
- Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA.,School of Chemistry and Biochemistry, School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Kyle D Gilroy
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
| | - Hsin-Chieh Peng
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
| | - Xiaohu Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
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Fan Z, Zhu Y, Huang X, Han Y, Wang Q, Liu Q, Huang Y, Gan CL, Zhang H. Synthesis of Ultrathin Face-Centered-Cubic Au@Pt and Au@Pd Core-Shell Nanoplates from Hexagonal-Close-Packed Au Square Sheets. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500993] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Fan Z, Zhu Y, Huang X, Han Y, Wang Q, Liu Q, Huang Y, Gan CL, Zhang H. Synthesis of Ultrathin Face-Centered-Cubic Au@Pt and Au@Pd Core-Shell Nanoplates from Hexagonal-Close-Packed Au Square Sheets. Angew Chem Int Ed Engl 2015; 54:5672-6. [DOI: 10.1002/anie.201500993] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Indexed: 01/27/2023]
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Wang Y, He J, Liu C, Chong WH, Chen H. Thermodynamik und Kinetik in der Nanosynthese. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402986] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Wang Y, He J, Liu C, Chong WH, Chen H. Thermodynamics versus Kinetics in Nanosynthesis. Angew Chem Int Ed Engl 2014; 54:2022-51. [DOI: 10.1002/anie.201402986] [Citation(s) in RCA: 329] [Impact Index Per Article: 32.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Indexed: 12/29/2022]
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Bai S, Wang C, Deng M, Gong M, Bai Y, Jiang J, Xiong Y. Surface Polarization Matters: Enhancing the Hydrogen-Evolution Reaction by Shrinking Pt Shells in Pt-Pd-Graphene Stack Structures. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406468] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Bai S, Wang C, Deng M, Gong M, Bai Y, Jiang J, Xiong Y. Surface polarization matters: enhancing the hydrogen-evolution reaction by shrinking Pt shells in Pt-Pd-graphene stack structures. Angew Chem Int Ed Engl 2014; 53:12120-4. [PMID: 25155584 DOI: 10.1002/anie.201406468] [Citation(s) in RCA: 222] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2014] [Indexed: 11/06/2022]
Abstract
Surface charge state plays an important role in tuning the catalytic performance of nanocrystals in various reactions. Herein, we report a synthetic approach to unique Pt-Pd-graphene stack structures with controllable Pt shell thickness. These unique hybrid structures allow us to correlate the Pt thickness with performance in the hydrogen-evolution reaction (HER). The HER activity increases with a decrease in the Pt thickness, which is well explained by surface polarization mechanism as suggested by first-principles simulations. In this hybrid system, the difference in work functions of Pt and Pd results in surface polarization on the Pt surface, tuning its charge state for hydrogen reduction. Meanwhile, the supporting graphene provides two-dimensional channels for efficient charge transport, improving the HER activities. This work opens up possibilities of reducing Pt usage while achieving high HER performance.
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Affiliation(s)
- Song Bai
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials, School of Chemistry and Materials Science, and Laboratory of Engineering and Material Science, University of Science and Technology of China, Hefei, Anhui 230026 (P. R. China) http://staff.ustc.edu.cn/∼yjxiong/
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Zheng Y, Liu W, Lv T, Luo M, Hu H, Lu P, Choi SI, Zhang C, Tao J, Zhu Y, Li ZY, Xia Y. Seed-Mediated Synthesis of Gold Tetrahedra in High Purity and with Tunable, Well-Controlled Sizes. Chem Asian J 2014; 9:2635-40. [DOI: 10.1002/asia.201402499] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Indexed: 11/09/2022]
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Wang W, Zhang J, Yang S, Ding B, Song X. Au@Pd core-shell nanobricks with concave structures and their catalysis of ethanol oxidation. CHEMSUSCHEM 2013; 6:1945-1951. [PMID: 23929810 DOI: 10.1002/cssc.201300454] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2013] [Revised: 06/08/2013] [Indexed: 06/02/2023]
Abstract
Au@Pd core-shell nanobricks (CNBs) with concave surfaces and Pd shells with a thickness of approximately 5 nm were synthesized by co-reduction of HAuCl4 and H2 PdCl4 in the presence of Au seeds and Ag ions. These as-synthesized concave CNBs exhibit significantly enhanced catalytic activity for the electrooxidation of ethanol in alkaline media compared to the commercially-used Pd black. The improved performance of the Au@Pd CNBs can be attributed to the exposed stepped surfaces, high-index facets, and the synergistic effects of the core and shell metals.
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Affiliation(s)
- Wenjin Wang
- MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, School of Science, Xi'an Jiaotong University, Shann Xi, 710049 (PR China)
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Xie S, Lu N, Xie Z, Wang J, Kim MJ, Xia Y. Synthesis of Pd-Rh Core-Frame Concave Nanocubes and Their Conversion to Rh Cubic Nanoframes by Selective Etching of the Pd Cores. Angew Chem Int Ed Engl 2012; 51:10266-70. [DOI: 10.1002/anie.201206044] [Citation(s) in RCA: 209] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Indexed: 01/25/2023]
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22
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Xie S, Lu N, Xie Z, Wang J, Kim MJ, Xia Y. Synthesis of Pd-Rh Core-Frame Concave Nanocubes and Their Conversion to Rh Cubic Nanoframes by Selective Etching of the Pd Cores. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201206044] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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23
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Huang X, Li Y, Zhou H, Zhong X, Duan X, Huang Y. Simplifying the Creation of Dumbbell-Like Cu-Ag Nanostructures and Their Enhanced Catalytic Activity. Chemistry 2012; 18:9505-10. [DOI: 10.1002/chem.201200817] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2012] [Indexed: 11/09/2022]
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