1
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Zhao X, Zhu X, Wang K, Lv J, Chen S, Yao G, Lang J, Lv F, Pu Y, Yang R, Zhang B, Jiang Z, Wan Y. Palladium catalyzed radical relay for the oxidative cross-coupling of quinolines. Nat Commun 2022; 13:4180. [PMID: 35853877 PMCID: PMC9296488 DOI: 10.1038/s41467-022-31967-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 07/06/2022] [Indexed: 02/03/2023] Open
Abstract
Traditional approaches for transition-metal catalyzed oxidative cross-coupling reactions rely on sp2-hybridized starting materials, such as aryl halides, and more specifically, homogeneous catalysts. We report a heterogeneous Pd-catalyzed radical relay method for the conversion of a heteroarene C(sp3)–H bond into ethers. Pd nanoparticles are supported on an ordered mesoporous composite which, when compared with microporous activated carbons, greatly increases the Pd d charge because of their strong interaction with N-doped anatase nanocrystals. Mechanistic studies provide evidence that electron-deficient Pd with Pd–O/N coordinations efficiently catalyzes the radical relay reaction to release diffusible methoxyl radicals, and highlight the difference between this surface reaction and C–H oxidation mediated by homogeneous catalysts that operate with cyclopalladated intermediates. The reactions proceed efficiently with a turn-over frequency of 84 h−1 and high selectivity toward ethers of >99%. Negligible Pd leaching and activity loss are observed after 7 catalytic runs. Traditional approaches for transition-metal catalyzed oxidative cross-coupling reactions rely on sp2-hybridized starting materials. Here the authors report a heterogeneous Pd-catalyzed radical relay method for the conversion of a heteroarene C(sp3)–H bond into ethers.
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Affiliation(s)
- Xiaorui Zhao
- The Education Ministry Key Laboratory of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, P. R. China.,School of Chemistry and Chemical Engineering, Taishan University, Shandong, P. R. China
| | - Xiaojuan Zhu
- The Education Ministry Key Laboratory of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, P. R. China
| | - Kang Wang
- The Education Ministry Key Laboratory of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, P. R. China
| | - Junqian Lv
- The Education Ministry Key Laboratory of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, P. R. China
| | - Shangjun Chen
- The Education Ministry Key Laboratory of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, P. R. China
| | - Guohua Yao
- The Education Ministry Key Laboratory of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, P. R. China
| | - Junyu Lang
- School of Physical Science and Technology, Shanghai Tech University, Shanghai, P. R. China
| | - Fei Lv
- The Education Ministry Key Laboratory of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, P. R. China
| | - Yinghui Pu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, P. R. China
| | - Ruoou Yang
- State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Hubei, P. R. China
| | - Bingsen Zhang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, P. R. China.
| | - Zheng Jiang
- Shanghai Synchrotron Radiation Facility, Zhangjiang National Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, P. R. China.
| | - Ying Wan
- The Education Ministry Key Laboratory of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, P. R. China.
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2
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Tierney GF, Alijani S, Panchal M, Decarolis D, Gutierrez MB, Mohammed KMH, Callison J, Gibson EK, Thompson PBJ, Collier P, Dimitratos N, Corbos EC, Pelletier F, Villa A, Wells PP. Controlling the Production of Acid Catalyzed Products of Furfural Hydrogenation by Pd/TiO
2. ChemCatChem 2021. [DOI: 10.1002/cctc.202101036] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- George F. Tierney
- School of Chemistry University of Southampton Southampton SO17 1BJ UK
- UK Catalysis Hub Research Complex at Harwell Rutherford Appleton Laboratory Harwell, Didcot OX11 0FA UK
| | - Shahram Alijani
- Dipartimento di Chimica Universitá degli Studi di Milano 20133 Milano Italy
| | - Monik Panchal
- UK Catalysis Hub Research Complex at Harwell Rutherford Appleton Laboratory Harwell, Didcot OX11 0FA UK
- Department of Chemistry University College London London WC1H OAJ UK
| | - Donato Decarolis
- UK Catalysis Hub Research Complex at Harwell Rutherford Appleton Laboratory Harwell, Didcot OX11 0FA UK
- Cardiff Catalysis Institute School of Chemistry Cardiff University Cardiff CF10 3AT UK
| | | | | | - June Callison
- UK Catalysis Hub Research Complex at Harwell Rutherford Appleton Laboratory Harwell, Didcot OX11 0FA UK
- Cardiff Catalysis Institute School of Chemistry Cardiff University Cardiff CF10 3AT UK
| | - Emma K. Gibson
- School of Chemistry University of Glasgow Glasgow G12 8QQ UK
| | - Paul B. J. Thompson
- BM28/XMaS UK CRG ESRF 38043 Grenoble France
- Oliver Lodge Laboratory Department of Physics University of Liverpool Liverpool L69 7ZE UK
| | - Paul Collier
- Johnson Matthey Technology Centre Sonning Common, Reading RG4 9NH UK
| | - Nikolaos Dimitratos
- Dipartimento di Chimica Industriale “Toso Montanari” Alma Mater Studiorum Universitá di Bologna 40136 Bologna Italy
| | - E. Crina Corbos
- Johnson Matthey Technology Centre Sonning Common, Reading RG4 9NH UK
| | | | - Alberto Villa
- Dipartimento di Chimica Universitá degli Studi di Milano 20133 Milano Italy
| | - Peter P. Wells
- School of Chemistry University of Southampton Southampton SO17 1BJ UK
- UK Catalysis Hub Research Complex at Harwell Rutherford Appleton Laboratory Harwell, Didcot OX11 0FA UK
- Diamond Light Source Harwell Science and Innovation Campus Chilton, Didcot OX11 0DE UK
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3
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Cano I, Weilhard A, Martin C, Pinto J, Lodge RW, Santos AR, Rance GA, Åhlgren EH, Jónsson E, Yuan J, Li ZY, Licence P, Khlobystov AN, Alves Fernandes J. Blurring the boundary between homogenous and heterogeneous catalysis using palladium nanoclusters with dynamic surfaces. Nat Commun 2021; 12:4965. [PMID: 34404801 PMCID: PMC8371125 DOI: 10.1038/s41467-021-25263-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 07/29/2021] [Indexed: 11/26/2022] Open
Abstract
Using a magnetron sputtering approach that allows size-controlled formation of nanoclusters, we have created palladium nanoclusters that combine the features of both heterogeneous and homogeneous catalysts. Here we report the atomic structures and electronic environments of a series of metal nanoclusters in ionic liquids at different stages of formation, leading to the discovery of Pd nanoclusters with a core of ca. 2 nm surrounded by a diffuse dynamic shell of atoms in [C4C1Im][NTf2]. Comparison of the catalytic activity of Pd nanoclusters in alkene cyclopropanation reveals that the atomically dynamic surface is critically important, increasing the activity by a factor of ca. 2 when compared to compact nanoclusters of similar size. Catalyst poisoning tests using mercury and dibenzo[a,e]cyclooctene show that dynamic Pd nanoclusters maintain their catalytic activity, which demonstrate their combined features of homogeneous and heterogeneous catalysts within the same material. Additionally, kinetic studies of cyclopropanation of alkenes mediated by the dynamic Pd nanoclusters reveal an observed catalyst order of 1, underpinning the pseudo-homogeneous character of the dynamic Pd nanoclusters. Establishing a structure-property relationship for nanoclusters and the link with their catalytic performance remain challenging. Here the authors show palladium nanocluster with a core of 2 nm surrounded by a diffuse dynamic shell of Pd atoms exhibit features of heterogeneous and homogenous catalyst at the same time.
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Affiliation(s)
- Israel Cano
- School of Chemistry, University of Nottingham, Nottingham, UK
| | | | - Carmen Martin
- School of Chemistry, University of Nottingham, Nottingham, UK
| | - Jose Pinto
- School of Chemistry, University of Nottingham, Nottingham, UK.,GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Nottingham, UK
| | - Rhys W Lodge
- School of Chemistry, University of Nottingham, Nottingham, UK
| | - Ana R Santos
- GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Nottingham, UK
| | - Graham A Rance
- School of Chemistry, University of Nottingham, Nottingham, UK.,Nanoscale and Microscale Research Centre, University of Nottingham, Nottingham, UK
| | | | - Erlendur Jónsson
- Department of Chemistry, University of Cambridge, Cambridge, UK.,Department of Physics, Chalmers University of Technology, Gothenburg, Sweden
| | - Jun Yuan
- Department of Physics, University of York, York, UK
| | - Ziyou Y Li
- Nanoscale Physics Research Laboratory, School of Physics and Astronomy, University of Birmingham, Birmingham, UK
| | - Peter Licence
- GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Nottingham, UK
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4
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Cheng H, Yang N, Liu X, Yun Q, Goh MH, Chen B, Qi X, Lu Q, Chen X, Liu W, Gu L, Zhang H. Aging amorphous/crystalline heterophase PdCu nanosheets for catalytic reactions. Natl Sci Rev 2019; 6:955-961. [PMID: 34691956 PMCID: PMC8291566 DOI: 10.1093/nsr/nwz078] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 06/12/2019] [Accepted: 06/12/2019] [Indexed: 01/13/2023] Open
Abstract
Phase engineering is arising as an attractive strategy to tune the properties and functionalities of nanomaterials. In particular, amorphous/crystalline heterophase nanostructures have exhibited some intriguing properties. Herein, the one-pot wet-chemical synthesis of two types of amorphous/crystalline heterophase PdCu nanosheets is reported, in which one is amorphous phase-dominant and the other one is crystalline phase-dominant. Then the aging process of the synthesized PdCu nanosheets is studied, during which their crystallinity increases, accompanied by changes in some physicochemical properties. As a proof-of-concept application, their aging effect on catalytic hydrogenation of 4-nitrostyrene is investigated. As a result, the amorphous phase-dominant nanosheets initially show excellent chemoselectivity. After aging for 14 days, their catalytic activity is higher than that of crystalline phase-dominant nanosheets. This work demonstrates the intriguing properties of heterophase nanostructures, providing a new platform for future studies on the regulation of functionalities and applications of nanomaterials by phase engineering.
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Affiliation(s)
- Hongfei Cheng
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Nailiang Yang
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaozhi Liu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qinbai Yun
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Min Hao Goh
- Singapore Institute of Manufacturing Technology, A*STAR, Singapore 638075, Singapore
| | - Bo Chen
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Xiaoying Qi
- Singapore Institute of Manufacturing Technology, A*STAR, Singapore 638075, Singapore
| | - Qipeng Lu
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Xiaoping Chen
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
| | - Wen Liu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Songshan Lake Materials Laboratory, Dongguan 523808, China
| | - Hua Zhang
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
- Department of Chemistry, City University of Hong Kong, Hong Kong, China
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5
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Zhang P, Zhang X, Kang X, Liu H, Chen C, Xie C, Han B. Salt-mediated synthesis of bimetallic networks with structural defects and their enhanced catalytic performances. Chem Commun (Camb) 2018; 54:12065-12068. [DOI: 10.1039/c8cc07029f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Bimetallic alloys with abundant of structural defects and enhanced catalytic performances were prepared tailoring by salts.
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Affiliation(s)
- Pei Zhang
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid and Interface and Thermodynamics
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Xiudong Zhang
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid and Interface and Thermodynamics
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Xinchen Kang
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid and Interface and Thermodynamics
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Huizhen Liu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid and Interface and Thermodynamics
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Chunjun Chen
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid and Interface and Thermodynamics
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Chao Xie
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid and Interface and Thermodynamics
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Buxing Han
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid and Interface and Thermodynamics
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
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6
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Elgorban AM, El-Samawaty AERM, Abd-Elkader OH, Yassin MA, Sayed SRM, Khan M, Farooq Adil S. Bioengineered silver nanoparticles using Curvularia pallescens and its fungicidal activity against Cladosporium fulvum. Saudi J Biol Sci 2016; 24:1522-1528. [PMID: 30294221 PMCID: PMC6169509 DOI: 10.1016/j.sjbs.2016.09.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 08/27/2016] [Accepted: 09/25/2016] [Indexed: 11/25/2022] Open
Abstract
Microorganisms based biosynthesis of nanomaterials has triggered significant attention, due to their great potential as vast source of the production of biocompatible nanoparticles (NPs). Such biosynthesized functional nanomaterials can be used for various biomedical applications. The present study investigates the green synthesis of silver nanoparticles (Ag NPs) using the fungus Curvularia pallescens (C. pallescens) which is isolated from cereals. The C. pallescens cell filtrate was used for the reduction of AgNO3 to Ag NPs. To the best of our knowledge C. pallescens is utilized first time for the preparation of Ag NPs. Several alkaloids and proteins present in the phytopathogenic fungus C. pallescens were mainly responsible for the formation of highly crystalline Ag NPs. The as-synthesized Ag NPs were characterized by using UV–Visible spectroscopy, X-ray diffraction and transmission electron microscopy (TEM). The TEM micrographs have revealed that spherical shaped Ag NPs with polydisperse in size were obtained. These results have clearly suggested that the biomolecules secreted by C. pallescens are mainly responsible for the formation and stabilization of nanoparticles. Furthermore, the antifungal activity of the as-prepared Ag NPs was tested against Cladosporium fulvum, which is the major cause of a serious plant disease, known as tomato leaf mold. The synthesized Ag NPs displayed excellent fungicidal activity against the tested fungal pathogen. The extreme zone of reduction occurred at 50 μL, whereas, an increase in the reduction activity is observed with increasing the concentration of Ag NPs. These encouraging results can be further exploited by employing the as synthesized Ag NPs against various pathogenic fungi in order to ascertain their spectrum of fungicidal activity.
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Affiliation(s)
- Abdallah M Elgorban
- Botany and Microbiology Department, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia.,Plant Pathology Research Institute, Agricultural Research Center, Giza, Egypt
| | - Abd El-Rahim M El-Samawaty
- Botany and Microbiology Department, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia.,Plant Pathology Research Institute, Agricultural Research Center, Giza, Egypt
| | - Omar H Abd-Elkader
- Zoology Department, EM Unit, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia.,Electron Microscope and Thin Films Department, National Research Centre, El-Behooth St., 12622 Dokki, Cairo, Egypt
| | - Mohamed A Yassin
- Botany and Microbiology Department, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia.,Plant Pathology Research Institute, Agricultural Research Center, Giza, Egypt
| | - Shaban R M Sayed
- Zoology Department, EM Unit, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia.,Department Botany and Microbiology, College of Science, Minia University, El-Minia 61511, Egypt
| | - Mujeeb Khan
- Chemistry Department, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia
| | - Syed Farooq Adil
- Chemistry Department, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia
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7
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Liu Y, Sun C, Bolin T, Wu T, Liu Y, Sternberg M, Sun S, Lin XM. Kinetic pathway of palladium nanoparticle sulfidation process at high temperatures. NANO LETTERS 2013; 13:4893-4901. [PMID: 24067076 DOI: 10.1021/nl402768b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A significant issue related to Palladium (Pd) based catalysts is that sulfur-containing species, such as alkanethiols, can form a PdSx underlayer on nanoparticle surface and subsequently poison the catalysts. Understanding the exact reaction pathway, the degree of sulfidation, the chemical stoichiometry, and the temperature dependence of this process is critically important. Combining energy-filtered transmission electron microscopy (EFTEM), X-ray diffraction (XRD), and X-ray absorption spectroscopy experiments at the S K-, Pd K-, and L2,3-edges, we show the kinetic pathway of Pd nanoparticle sulfidation process with the addition of excess amount of octadecanethiol at different temperatures, up to 250 °C. We demonstrate that the initial polycrystalline Pd-oleylamine nanoparticles gradually become amorphous PdSx nanoparticles, with the sulfur atomic concentration eventually saturating at Pd/S = 66:34 at 200 °C. This final chemical stoichiometry of the sulfurized nanoparticles closely matches that of the crystalline P16S7 phase (30.4% S), albeit being structurally amorphous. Sulfur diffusion into the nanoparticle depends strongly on the temperature. At 90 °C, sulfidation remains limited at the surface of nanoparticles even with extended heating time; whereas at higher temperatures beyond 125 °C, sulfidation occurs rapidly in the interior of the particles, far beyond what can be described as a core-shell model. This indicates sulfur diffusion from the surface to the interior of the particle is subject to a diffusion barrier and likely first go through the grain boundaries of the nanoparticle.
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Affiliation(s)
- Yi Liu
- Center for Nanoscale Materials and ‡Advanced Photon Source, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
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8
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Kibata T, Mitsudome T, Mizugaki T, Jitsukawa K, Kaneda K. Investigation of size-dependent properties of sub-nanometer palladium clusters encapsulated within a polyamine dendrimer. Chem Commun (Camb) 2013; 49:167-9. [DOI: 10.1039/c2cc37038g] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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9
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Sasaki K, Naohara H, Choi Y, Cai Y, Chen WF, Liu P, Adzic RR. Highly stable Pt monolayer on PdAu nanoparticle electrocatalysts for the oxygen reduction reaction. Nat Commun 2012; 3:1115. [DOI: 10.1038/ncomms2124] [Citation(s) in RCA: 348] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Accepted: 09/06/2012] [Indexed: 01/24/2023] Open
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10
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Tang S, Vongehr S, Zheng Z, Ren H, Meng X. Facile and rapid synthesis of spherical porous palladium nanostructures with high catalytic activity for formic acid electro-oxidation. NANOTECHNOLOGY 2012; 23:255606. [PMID: 22652508 DOI: 10.1088/0957-4484/23/25/255606] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Highly uniform, spherical porous palladium nanostructures (SPPNs) with rough surfaces were prepared by a facile and rapid ultrasound assisted reduction. The synthesis involves sonicating a solution of K(2)PdCl(4) and ascorbic acid for only 7 min at 40 °C without any additives. The products are isolated structures with a narrow size distribution, and their average diameters are controllable in a range from 40 to 100 nm via the K(2)PdCl(4) concentration. Typical products have a diameter of 52 nm and consist of loosely packed grains of 2-3 nm. They are thus very porous, with a specific surface area of 47 m(2) g(-1). The growth mechanism of SPPNs is discussed on the basis of varying relevant reaction parameters and characterizations from different microscopy techniques, nitrogen absorption analysis, and time-dependent UV-vis spectra. The electrocatalytic performance of the SPPNs was evaluated by electro-oxidation of formic acid. The mass current density per mass of SPPNs (1.88 A mg(-1)) exceeds that of commercial Pd black (1.69 A mg(-1)) and is more than twice that of commercial Pd/C catalyst (0.79 A mg(-1)). Long-term stability of the activity makes this material a promising anode catalyst for direct formic acid fuel cells.
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Affiliation(s)
- Shaochun Tang
- National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, Nanjing University, Nanjing, People's Republic of China
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11
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Christensen SL, Chatt A, Zhang P. Biomolecule-coated metal nanoparticles on titanium. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:2979-2985. [PMID: 22200112 DOI: 10.1021/la204398q] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Immobilizations of nanoparticles and biomolecules on biocompatible substrates such as titanium are two promising approaches to bringing new functionalities to Ti-based biomaterials. Herein, we used a variety of X-ray spectroscopic techniques to study and better understand metal-thiolate interactions in biofunctionalized metal nanoparticle systems supported on Ti substrates. Using a facile one-step procedure, a series of Au nanoparticle samples with varied biomolecule coatings ((2-mercatopropionyl)glycine (MPG) and bovine serum albumin (BSA)) and biomolecule concentrations are prepared. Ag and Pd systems are also studied to observe change with varying metal composition. The structure and properties of these biomolecule-coated nanoparticles are investigated with scanning electron microscopy (SEM) and element-specific X-ray techniques, including extended X-ray absorption fine structure (Au L(3)-edge), X-ray absorption near-edge structure (Au L(3), Ag L(3), Pd L(3), and S K-edge), and X-ray photoelectron spectroscopy (Au 4f, Ag 3d, Pd 3d, and S 2p core level). It was found that, by comparison of SEM and X-ray spectroscopy results, the coating of metal nanoparticles with varying model biomolecule systems can have a significant effect on both surface coverage and organization. This work offers a facile chemical method for bio- and nanofunctionalization of Ti substrates as well as provides a physical picture of the structure and bonding of biocoated metal nanoparticles, which may lead to useful applications in orthopedics and biomedicine.
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Affiliation(s)
- Stephen L Christensen
- Department of Chemistry and Institute for Research in Materials, Dalhousie University, Halifax, NS B3M 4J3, Canada
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12
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Carro P, Corthey G, Rubert AA, Benitez GA, Fonticelli MH, Salvarezza RC. The complex thiol-palladium interface: a theoretical and experimental study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:14655-14662. [PMID: 20726614 DOI: 10.1021/la102505c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
This paper presents a theoretical study of the surface structures and thermodynamic stability of different thiol and sulfide structures present on the palladium surface as a function of the chemical potential of the thiol species. It has been found that as the chemical potential of the thiol is increased, the initially clean palladium surface is covered by a (√3 × √3)R30° sulfur lattice. Further increase in the thiol pressure or concentration leads to the formation of a denser (√7 × √7)R19.1° sulfur lattice, which finally undergoes a phase transition to form a complex (√7 × √7)R19.1° sulfur + thiol adlayer (3/7 sulfur + 2/7 thiol coverage). This transition is accompanied by a strong reconstruction of the Pd(111) surface. The formation of these surface structures has been explained in terms of the catalytic properties of the palladium surface. These results have been compared with X-ray photoelectron spectroscopy results obtained for thiols adsorbed on different palladium surfaces.
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Affiliation(s)
- Pilar Carro
- Departamento de Química Física, Universidad de La Laguna, Tenerife, Spain.
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13
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Thomson JW, Cademartiri L, MacDonald M, Petrov S, Calestani G, Zhang P, Ozin GA. Ultrathin Bi2S3 Nanowires: Surface and Core Structure at the Cluster-Nanocrystal Transition. J Am Chem Soc 2010; 132:9058-68. [DOI: 10.1021/ja101908k] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Jordan W. Thomson
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, Canada, Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts, Department of Chemistry, Dalhousie University, Halifax, NS, Canada, and Dipartimento di Chimica GIAF, Universita’ di Parma, viale Usberti 17, Parma, Italy
| | - Ludovico Cademartiri
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, Canada, Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts, Department of Chemistry, Dalhousie University, Halifax, NS, Canada, and Dipartimento di Chimica GIAF, Universita’ di Parma, viale Usberti 17, Parma, Italy
| | - Mark MacDonald
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, Canada, Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts, Department of Chemistry, Dalhousie University, Halifax, NS, Canada, and Dipartimento di Chimica GIAF, Universita’ di Parma, viale Usberti 17, Parma, Italy
| | - Srebri Petrov
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, Canada, Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts, Department of Chemistry, Dalhousie University, Halifax, NS, Canada, and Dipartimento di Chimica GIAF, Universita’ di Parma, viale Usberti 17, Parma, Italy
| | - Gianluca Calestani
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, Canada, Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts, Department of Chemistry, Dalhousie University, Halifax, NS, Canada, and Dipartimento di Chimica GIAF, Universita’ di Parma, viale Usberti 17, Parma, Italy
| | - Peng Zhang
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, Canada, Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts, Department of Chemistry, Dalhousie University, Halifax, NS, Canada, and Dipartimento di Chimica GIAF, Universita’ di Parma, viale Usberti 17, Parma, Italy
| | - Geoffrey A. Ozin
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, Canada, Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts, Department of Chemistry, Dalhousie University, Halifax, NS, Canada, and Dipartimento di Chimica GIAF, Universita’ di Parma, viale Usberti 17, Parma, Italy
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14
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Bayindir Z, Duchesne PN, Cook SC, MacDonald MA, Zhang P. X-ray spectroscopy studies on the surface structural characteristics and electronic properties of platinum nanoparticles. J Chem Phys 2009; 131:244716. [DOI: 10.1063/1.3276917] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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15
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Murphy PB, Liu F, Cook SC, Jahan N, Marangoni DG, Grindley TB, Zhang P. Structural control of Au and Au–Pd nanoparticles by selecting capping ligands with varied electronic and steric effects. CAN J CHEM 2009. [DOI: 10.1139/v09-127] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Weakly interacting ligands including three Gemini surfactants, didodecyldimethylammonium bromide (DDAB), and amines (RNH2, R2NH, and R3N) were used to prepare Au nanoparticles (NPs). Aqueous Au NPs capped with DDAB and Gemini surfactants showed similar sizes (3–4 nm), whereas toluene-based NPs stabilized with DDAB, amines, and their mixtures range from 2.5 to 9.3 nm. Ligand effect on Au–Pd NP structure was also studied with EXAFS. These findings were consistently accounted for by considering the ligand’s electronic/steric effects and mixed ligands coadsorption, and suggest useful ways to control NP structure by manipulating the two effects and using mixed capping ligands.
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Affiliation(s)
- Patrick B. Murphy
- Department of Chemistry and Institute for Research in Materials, Dalhousie University, Halifax, NS B3H 4J3, Canada
- Department of Chemistry, St. Francis Xavier University, Antigonish, NS B2G 2W5, Canada
| | - Feng Liu
- Department of Chemistry and Institute for Research in Materials, Dalhousie University, Halifax, NS B3H 4J3, Canada
- Department of Chemistry, St. Francis Xavier University, Antigonish, NS B2G 2W5, Canada
| | - Stephen C. Cook
- Department of Chemistry and Institute for Research in Materials, Dalhousie University, Halifax, NS B3H 4J3, Canada
- Department of Chemistry, St. Francis Xavier University, Antigonish, NS B2G 2W5, Canada
| | - Nusrat Jahan
- Department of Chemistry and Institute for Research in Materials, Dalhousie University, Halifax, NS B3H 4J3, Canada
- Department of Chemistry, St. Francis Xavier University, Antigonish, NS B2G 2W5, Canada
| | - D. Gerrard Marangoni
- Department of Chemistry and Institute for Research in Materials, Dalhousie University, Halifax, NS B3H 4J3, Canada
- Department of Chemistry, St. Francis Xavier University, Antigonish, NS B2G 2W5, Canada
| | - T. Bruce Grindley
- Department of Chemistry and Institute for Research in Materials, Dalhousie University, Halifax, NS B3H 4J3, Canada
- Department of Chemistry, St. Francis Xavier University, Antigonish, NS B2G 2W5, Canada
| | - Peng Zhang
- Department of Chemistry and Institute for Research in Materials, Dalhousie University, Halifax, NS B3H 4J3, Canada
- Department of Chemistry, St. Francis Xavier University, Antigonish, NS B2G 2W5, Canada
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16
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Kim JH, Bryan WW, Chung HW, Park CY, Jacobson AJ, Lee TR. Gold, palladium, and gold-palladium alloy nanoshells on silica nanoparticle cores. ACS APPLIED MATERIALS & INTERFACES 2009; 1:1063-1069. [PMID: 20355892 DOI: 10.1021/am900039a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The synthesis of gold, palladium, and gold-palladium alloy nanoshells (approximately 15-20 nm thickness) was accomplished by the reduction of gold and palladium ions onto dielectric silica core particles (approximately 100 nm in diameter) seeded with small gold nanoparticles (approximately 2-3 nm in diameter). The size, morphology, elemental composition, and optical properties of the nanoshells were characterized using field-emission scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and ultraviolet-visible spectroscopy. The results demonstrate the successful growth of gold, palladium, and gold-palladium alloy nanoshells, where the optical properties systematically vary with the relative content of gold and palladium. The alloy nanoshells are being prepared for use in applications that stand to benefit from photoenhanced catalysis.
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Affiliation(s)
- Jun-Hyun Kim
- Department of Chemistry and Texas Center for Superconductivity, University of Houston, 4800 Calhoun Road, Houston, Texas 77204-5003, USA
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17
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Liu F, Wechsler D, Zhang P. Alloy-structure-dependent electronic behavior and surface properties of Au–Pd nanoparticles. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.07.029] [Citation(s) in RCA: 112] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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