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Chatterjee P, Wang H, Manzano JS, Kanbur U, Sadow AD, Slowing II. Surface ligands enhance the catalytic activity of supported Au nanoparticles for the aerobic α-oxidation of amines to amides. Catal Sci Technol 2022. [DOI: 10.1039/d1cy02121d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The catalytic aerobic α-oxidation of amines in water is an atom economic and green alternative to current methods of amide synthesis. The reaction uses O2 as terminal oxidant, avoids hazardous...
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Gallo IBC, Carbonio EA, Villullas HM. What Determines Electrochemical Surface Processes on Carbon-Supported PdAu Nanoparticles? ACS Catal 2018. [DOI: 10.1021/acscatal.7b03734] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Irã B. C. Gallo
- Universidade Estadual Paulista (UNESP), Instituto de
Química, Araraquara, 14800-060 Sao Paulo, Brazil
| | - Emilia A. Carbonio
- Helmholtz-Zentrum Berlin für Materialien und Energie, BESSY-II, Albert-Einstein-Straße
15, 12489 Berlin, Germany
| | - Hebe M. Villullas
- Universidade Estadual Paulista (UNESP), Instituto de
Química, Araraquara, 14800-060 Sao Paulo, Brazil
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Oliveira Silva AC, de Oliveira LCF, Vieira Delfino A, Meneghetti MR, Caxico de Abreu F. Electrochemical Study of Carbon Nanotubes/Nanohybrids for Determination of Metal Species Cu 2+ and Pb 2+ in Water Samples. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2016; 2016:9802738. [PMID: 27882263 PMCID: PMC5108864 DOI: 10.1155/2016/9802738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Accepted: 10/10/2016] [Indexed: 06/06/2023]
Abstract
The use of nanomaterials, such as nanoparticles and nanotubes, for electrochemical detection of metal species has been investigated as a way of modifying electrodes by electrochemical stripping analysis. The present study develops a new methodology based on a comparative study of nanoparticles and nanotubes with differential pulse anodic stripping voltammetry (DPASV) and examines the simultaneous determination of copper and lead. The glassy carbon electrode modified by gold nanoparticles demonstrated increased sensitivity and decreased detection limits, among other improvements in analytical performance data. Under optimized conditions (deposition potential -0.8 V versus Ag/AgCl; deposition time, 300 s; resting time, 10 s; pulse amplitude, 50 mV; and voltage step height, 4 mV), the detection limits were 0.2279 and 0.3321 ppb, respectively, for determination of Pb2+ and Cu2+. The effects of cations and anions on the simultaneous determination of metal ions do not exhibit significant interference, thereby demonstrating the selectivity of the electrode for simultaneous determination of Pb2+ and Cu2+. The same method was also used to determine Cu2+ in water samples.
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Affiliation(s)
| | | | - Angladis Vieira Delfino
- Instituto de Química e Biotecnologia, Universidade Federal de Alagoas (UFAL), 57072-970 Maceió, AL, Brazil
| | - Mario Roberto Meneghetti
- Instituto de Química e Biotecnologia, Universidade Federal de Alagoas (UFAL), 57072-970 Maceió, AL, Brazil
| | - Fabiane Caxico de Abreu
- Instituto de Química e Biotecnologia, Universidade Federal de Alagoas (UFAL), 57072-970 Maceió, AL, Brazil
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Villa A, Dimitratos N, Chan-Thaw CE, Hammond C, Veith GM, Wang D, Manzoli M, Prati L, Hutchings GJ. Characterisation of gold catalysts. Chem Soc Rev 2016; 45:4953-94. [DOI: 10.1039/c5cs00350d] [Citation(s) in RCA: 118] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Au-based catalysts have established a new important field of catalysis, revealing specific properties in terms of both high activity and selectivity for many reactions.
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Affiliation(s)
- Alberto Villa
- Dipartimento di Chimica
- Università degli studi di Milano
- Milano
- Italy
| | | | | | | | - Gabriel M. Veith
- Materials Science and Technology Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
| | - Di Wang
- Institute of Nanotechnology and Karlsruhe Nano Micro Facility Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Maela Manzoli
- Dipartimento di Chimica
- Università degli Studi di Torino
- Torino
- Italy
| | - Laura Prati
- Dipartimento di Chimica
- Università degli studi di Milano
- Milano
- Italy
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Liu X, Zhang X, Bo M, Li L, Tian H, Nie Y, Sun Y, Xu S, Wang Y, Zheng W, Sun CQ. Coordination-resolved electron spectrometrics. Chem Rev 2015; 115:6746-810. [PMID: 26110615 DOI: 10.1021/cr500651m] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Xinjuan Liu
- †Institute of Coordination Bond Metrology and Engineering, College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China
| | - Xi Zhang
- ‡Institute of Nanosurface Science and Engineering, Shenzhen University, Shenzhen 518060, China
| | - Maolin Bo
- §Key Laboratory of Low-Dimensional Materials and Application Technologies (Ministry of Education) and School of Materials Science and Engineering, Xiangtan University, Hunan 411105, China
| | - Lei Li
- ∥School of Materials Science, Jilin University, Changchun 130012, China
| | - Hongwei Tian
- ∥School of Materials Science, Jilin University, Changchun 130012, China
| | - Yanguang Nie
- ⊥School of Science, Jiangnan University, Wuxi 214122, China
| | - Yi Sun
- #Harris School of Public Policy, University of Chicago, Chicago, Illinois 60637, United States
| | - Shiqing Xu
- †Institute of Coordination Bond Metrology and Engineering, College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China
| | - Yan Wang
- ∇School of Information Technology, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Weitao Zheng
- ∥School of Materials Science, Jilin University, Changchun 130012, China
| | - Chang Q Sun
- ○NOVITAS, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
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Liu J, Krishna KS, Losovyj YB, Chattopadhyay S, Lozova N, Miller JT, Spivey JJ, Kumar CSSR. Ligand-Stabilized and Atomically Precise Gold Nanocluster Catalysis: A Case Study for Correlating Fundamental Electronic Properties with Catalysis. Chemistry 2013; 19:10201-8. [DOI: 10.1002/chem.201300600] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 05/14/2013] [Indexed: 11/08/2022]
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Sans V, Moskalenko A, Wilson K, Kozhevin V, Yavsin D, Kuzmin I, Gurevich S, Lapkin A. SE(R)RS devices fabricated by a laser electrodispersion method. Analyst 2011; 136:3295-302. [DOI: 10.1039/c1an15378a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ferrara MC, Mirenghi L, Mevoli A, Tapfer L. Synthesis and characterization of sol-gel silica films doped with size-selected gold nanoparticles. NANOTECHNOLOGY 2008; 19:365706. [PMID: 21828887 DOI: 10.1088/0957-4484/19/36/365706] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Homogeneous nanocomposite silica films uniformly doped with size-selected gold nanoparticles (AuNPs) have been prepared by a combined use of colloidal chemistry and the sol-gel process. For this purpose, stable thiol-functionalized AuNPs (DDT-AuNPs) were first synthesized by a two-phase aqueous/organic system and, subsequently, dispersed in an acid-catalysed sol-gel silica solution. The microstructural morphology of the samples was investigated by x-ray diffraction and field emission scanning electron microscopy. X-ray photoelectron spectroscopy (XPS) and UV-vis optical spectrophotometry were instead employed to investigate the elemental chemical behaviour and the evolution of the surface plasmon resonance (SPR) band of the AuNPs from their synthesis up to the formation of the Au-doped silica films. The results show that the size, shape and crystalline domains of the AuNPs remain unchanged during the entire preparation process, indicating that their aggregation or decomposition was prevented. XPS results show that the DDT-AuNPs lose the capping shells and oxidize themselves when dispersed in acid-catalysed sol-gel solutions, and that bare AuNPs are embedded in the SiO(2) films. A large broadening of the SPR band, observed for systems with DDT-AuNPs, suggests the presence of interface effects which cause a surface electron density lowering. Thiol chain detachment from the AuNPs determines an increase of the SPR peak intensity while the oxidation of the Au surfaces causes a red shift of its position. The latter is no longer observed in doped films, suggesting that no interfacial effects between bare AuNPs and the host medium are present.
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Nie M, Tang H, Wei Z, Jiang SP, Shen PK. Highly efficient AuPd–WC/C electrocatalyst for ethanol oxidation. Electrochem commun 2007. [DOI: 10.1016/j.elecom.2007.07.006] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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