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Wang C, Herranz J, Hübner R, Schmidt TJ, Eychmüller A. Element Distributions in Bimetallic Aerogels. Acc Chem Res 2023; 56:237-247. [PMID: 36700845 DOI: 10.1021/acs.accounts.2c00491] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
ConspectusMetal aerogels assembled from nanoparticles have captured grand attention because they combine the virtues of metals and aerogels and are regarded as ideal materials to address current environmental and energy issues. Among these aerogels, those composed of two metals not only display combinations (superpositions) of the properties of their individual metal components but also feature novel properties distinctly different from those of their monometallic relatives. Therefore, quite some effort has been invested in refining the synthetic methods, compositions, and structures of such bimetallic aerogels as to boost their performance for the envisaged application(s). One such use would be in the field of electrocatalysis, whereby it is also of utmost interest to unravel the element distributions of the (multi)metallic catalysts to achieve a ratio of their bottom-to-up design. Regarding the element distributions in bimetallic aerogels, advanced characterization techniques have identified alloys, core-shells, and structures in which the two metal particles are segregated (i.e., adjacent but without alloy or core-shell structure formation). While an almost infinite number of metal combinations to form bimetallic aerogels can be envisaged, the knowledge of their formation mechanisms and the corresponding element distributions is still in its infancy. The evolution of the observed musters is all but well understood, not to mention the positional changes of the elements observed in operando or in beginning- vs end-of-life comparisons (e.g., in fuel cell applications).With this motivation, in this Account we summarize the endeavors made in element distribution monitoring in bimetallic aerogels in terms of synthetic methods, expected structures, and their evolution during electrocatalysis. After an introductory chapter, we first describe briefly the two most important characterization techniques used for this, namely, scanning transmission electron microscopy (STEM) combined with element mapping (e.g., energy-dispersive X-ray spectroscopy (EDXS)) and X-ray absorption spectroscopy (XAS). We then explain the universal methods used to prepare bimetallic aerogels with different compositions. Those are divided into one-step methods in which gels formed from mixtures of the respective metal salts are coreduced and two-step approaches in which monometallic nanoparticles are mixed and gelated. Subsequently, we summarize the current state-of-knowledge on the element distributions unraveled using diverse characterization methods. This is extended to investigations of the element distributions being altered during electrochemical cycling or other loads. So far, a theoretical understanding of these processes is sparse, not to mention predictions of element distributions. The Account concludes with a series of remarks on current challenges in the field and an outlook on the gains that the field would earn from a solid understanding of the underlying processes and a predictive theoretical backing.
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Affiliation(s)
- Cui Wang
- Physical Chemistry, Technische Universität Dresden, Zellescher Weg 19, 01069 Dresden, Germany
| | - Juan Herranz
- Electrochemistry Laboratory, Paul Scherrer Institut, 5232 Villigen, Switzerland
| | - René Hübner
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - Thomas J Schmidt
- Electrochemistry Laboratory, Paul Scherrer Institut, 5232 Villigen, Switzerland.,Laboratory of Physical Chemistry, ETH Zurich, CH-8093 Zurich, Switzerland
| | - Alexander Eychmüller
- Physical Chemistry, Technische Universität Dresden, Zellescher Weg 19, 01069 Dresden, Germany
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2
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Modification with platinum of silver-deposited nickel wire electrodes for electrocatalytic oxidation of alcohols. Electrochem commun 2021. [DOI: 10.1016/j.elecom.2021.106939] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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3
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Yao K, Zhao C, Wang N, Li T, Lu W, Wang J. An aqueous synthesis of porous PtPd nanoparticles with reversed bimetallic structures for highly efficient hydrogen generation from ammonia borane hydrolysis. NANOSCALE 2020; 12:638-647. [PMID: 31829363 DOI: 10.1039/c9nr07144j] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Fine construction of porous bimetallic nanomaterials with tunable components and structures is of great importance for their catalytic performance and durability. Herein, we present a facile and mild one-pot route for the preparation of porous PtPd bimetallic nanoparticles (NPs) with reversed structures in aqueous solution for the first time. To this end, a common ionic liquid (IL) 1-hexadecyl-3-methylimidazolium chloride ([C16mim]Cl) is utilized to direct the growth and assembly of porous structures of PtPd NPs. It is shown that the as-prepared porous Pt25Pd75 NPs have obvious hierarchical structures with nanoflowers as subunits and nanorods as basic units. The elemental components and structures of the porous PtPd NPs can be tuned by the precursor ratio and the [C16mim]Cl concentration. Furthermore, various porous PtPd bimetallic structures from Pd-on-Pt to Pt-on-Pd may be efficiently switched by controlling the concentration of glycine. Owing to their high specific surface area, porous hierarchical structures (including mesopores and micropores), and probable electronic effects between Pt and Pd, the porous Pt25Pd75 NPs (Pd-on-Pt structure) are found to exhibit prominent catalytic activity and high stability for hydrogen production from hydrolysis of ammonia borane.
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Affiliation(s)
- Kaisheng Yao
- School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan 471023, P. R. China.
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4
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Zhang X, Ossufo IGA, Ye H, Huang Y, Ge S, Xiang Z, Cui Y, Wang R. Efficient Synthesis of Bimetallic Pt
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Zn Alloy Nanocrystals with Different Shapes and their Enhanced Electrocatalytic Activity. ChemCatChem 2019. [DOI: 10.1002/cctc.201900649] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Xinran Zhang
- Beijing Advanced Innovation Center of Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science School of Mathematics and PhysicsUniversity of Science and Technology Beijing Beijing 100083 P.R. China
- Key Laboratory of Micro-nano Measurement-Manipulation and Physics Ministry of Education Department of PhysicsBeihang University Beijing 100191 P.R. China
| | - Iahaia Gomes Ali Ossufo
- Key Laboratory of Micro-nano Measurement-Manipulation and Physics Ministry of Education Department of PhysicsBeihang University Beijing 100191 P.R. China
| | - Huanyu Ye
- Beijing Advanced Innovation Center of Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science School of Mathematics and PhysicsUniversity of Science and Technology Beijing Beijing 100083 P.R. China
| | - Yunxia Huang
- Key Laboratory of Micro-nano Measurement-Manipulation and Physics Ministry of Education Department of PhysicsBeihang University Beijing 100191 P.R. China
| | - Shuaipeng Ge
- Key Laboratory of Micro-nano Measurement-Manipulation and Physics Ministry of Education Department of PhysicsBeihang University Beijing 100191 P.R. China
| | - Zhongcheng Xiang
- Key Laboratory of Micro-nano Measurement-Manipulation and Physics Ministry of Education Department of PhysicsBeihang University Beijing 100191 P.R. China
| | - Yimin Cui
- Key Laboratory of Micro-nano Measurement-Manipulation and Physics Ministry of Education Department of PhysicsBeihang University Beijing 100191 P.R. China
| | - Rongming Wang
- Beijing Advanced Innovation Center of Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science School of Mathematics and PhysicsUniversity of Science and Technology Beijing Beijing 100083 P.R. China
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Chen XL, Wen GL, Huang H, Wang AJ, Wang ZG, Feng JJ. Uric acid supported one-pot solvothermal fabrication of rhombic-like Pt 35Cu 65 hollow nanocages for highly efficient and stable electrocatalysis. J Colloid Interface Sci 2019; 540:486-494. [PMID: 30665171 DOI: 10.1016/j.jcis.2019.01.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/04/2019] [Accepted: 01/05/2019] [Indexed: 11/19/2022]
Abstract
High activity and good durability of electrocatalysts are of significance in practical applications of fuel cells. Among them, multi-component metallic hollow nanocages/nanoframes show great potential as advanced catalysts because of their highly open structures, large surface area and good stability. Herein, we report a general uric acid-mediated solvothermal method for shape-controlled synthesis of rhombic-like Pt35Cu65 hollow nanocages (HNCs) with uric acid as co-reductant and co-structure-directing agent. Uric acid and cetyltrimethylammonium chloride (CTAC) played important roles in the hollow cages. The specific architectures showed remarkably enhanced catalytic properties towards glycerol oxidation reaction (GOR), ethylene glycol oxidation reaction (EGOR) and oxygen reduction reaction (ORR) with the enhanced specific activity, outperforming commercial Pt/C (20 wt%). This work provides a new avenue for rational design of novel bimetallic nanocatalysts with enhanced characters in energy storage and conversion.
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Affiliation(s)
- Xue-Lu Chen
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Gui-Lin Wen
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Hong Huang
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, China
| | - Ai-Jun Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
| | - Zhi-Gang Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Jiu-Ju Feng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
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6
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Sun N, Yao K, Wang C, Zhao C, Lu W, Zhao S, Wang H, Wang J. Synthesis of various gold hierarchical architectures assisted by functionalized ionic liquids in aqueous solutions and their efficient SERS responses. J Colloid Interface Sci 2018; 531:194-203. [DOI: 10.1016/j.jcis.2018.07.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Revised: 06/25/2018] [Accepted: 07/11/2018] [Indexed: 10/28/2022]
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7
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Liu F, Qi P, Liang X, Chen W, Li B, Zhang L, Yang Y, Huang S. Tuning Ion Complexing To Rapidly Prepare Hollow Ag-Pt Nanowires with High Activity toward the Methanol Oxidization Reaction. Chemistry 2018; 24:17345-17355. [PMID: 30222221 DOI: 10.1002/chem.201804250] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Indexed: 11/06/2022]
Abstract
Hollow Pt-based nanowires (NWs) have important applications in catalysis. Their preparation often involves a two-step process in which M (M=Ag, Pd, Co, Ni) NWs are prepared and subsequently subjected to galvanic reaction in solution containing a Pt precursor. It is challenging to achieve a simple one-step preparation, because the redox potential of PtIV /Pt or PtII /Pt to Pt is high, and therefore, Pt atoms always form first. This work demonstrates that an appropriate pH can decrease the redox potential of PtIV /Pt and allows the one-step preparation of high-quality hollow Pt-Ag NWs rapidly (10 min). Moreover, it is easy to realize large-scale preparation with this method. The NW composition can be adjusted readily to optimize their performance in the electrocatalytic methanol oxidization reaction (MOR). Compared with commercial Pt/C, NWs with appropriate Ag/Pt ratios exhibit high stability, activity, and CO tolerance ability.
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Affiliation(s)
- Fangyan Liu
- Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Xueyuan road 276, WenZhou, Zhejiang, 325027, P.R. China
| | - Peimei Qi
- Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Xueyuan road 276, WenZhou, Zhejiang, 325027, P.R. China
| | - Xiaoli Liang
- Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Xueyuan road 276, WenZhou, Zhejiang, 325027, P.R. China
| | - Wei Chen
- Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Xueyuan road 276, WenZhou, Zhejiang, 325027, P.R. China
| | - Benxia Li
- Department of Chemistry, College of Science, Zhejiang Sci-Tech University, Hangzhou, 310018, P.R. China
| | - Lijie Zhang
- Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Xueyuan road 276, WenZhou, Zhejiang, 325027, P.R. China
| | - Yun Yang
- Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Xueyuan road 276, WenZhou, Zhejiang, 325027, P.R. China
| | - Shaoming Huang
- Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Xueyuan road 276, WenZhou, Zhejiang, 325027, P.R. China.,School of Materials and Energy, Guangdong University of Technology, Guangzhou, Guangdong, 510006, P.R. China
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8
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Pillegowda M, Periyasamy G. Influence of Ionic Liquid Solvation on Various Size Homo- and Heterometallic Clusters [M’ m
M n
] (M and M’= Au, Cu, Ag, Ni, Pd and Pt). ChemistrySelect 2017. [DOI: 10.1002/slct.201701889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Ganga Periyasamy
- Department of Chemistry; Bangalore University; Bangalore- 560001 India
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