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Hatch KKA, Burrell RE, Ward CN. Effect of a Novel sputtering process on the chemical and biological properties of silver-gold alloys. Int Wound J 2023; 21:e14475. [PMID: 37948116 PMCID: PMC10898371 DOI: 10.1111/iwj.14475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 10/16/2023] [Accepted: 10/17/2023] [Indexed: 11/12/2023] Open
Abstract
Silver-gold nanocrystalline films were sputtered on HDPE substrates by a physical vapour deposition process using alloys with a nominal composition of 65% silver/35% gold or 35% silver/65% gold by weight, with comparison to a 100% silver target. Novel process conditions were introduced to include both water and oxygen as reactive gases. X-ray diffraction and chemical digests were used to assess the structure and chemical composition of the films. Log reductions and corrected zone of inhibition tests were used to measure the biological properties. Despite a range of physical and chemical properties, biological tests showed that the bactericidal properties of all silver-gold films were comparable with silver-only films in the short term and 65% silver films made with Novel sputtering conditions had comparable bacteriostatic abilities to silver-only over a 7-day period. The benefit of including gold may be seen in future studies of anti-inflammatory activity.
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Affiliation(s)
| | - Robert Edward Burrell
- Department of Biomedical Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - Colleen Nancy Ward
- Department of Biomedical Engineering, University of Alberta, Edmonton, Alberta, Canada
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2
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Shen Y, Chen Y, Du M, Zhang Y, Wang B. Non-radical transformation of oxytetracycline by Vo-MnO@C/Pt0.8Au0.2-anode-activated peroxymonosulfate: influencing factors, mechanism, and toxicity assessment. Chem Eng Sci 2023. [DOI: 10.1016/j.ces.2023.118666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
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3
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Derbalah A, Essa T, Kamel SM, Omara RI, Abdelfatah M, Elshaer A, Elsharkawy MM. Silver oxide nanostructures as a new trend to control strawberry charcoal rot induced by Macrophomina phaseolina. PEST MANAGEMENT SCIENCE 2022; 78:4638-4648. [PMID: 35866210 DOI: 10.1002/ps.7084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 06/03/2022] [Accepted: 07/22/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Silver oxide (Ag2 O) nanostructures were fabricated and their ability to induce antifungal activity against Macrophomina phaseolina, which causes charcoal rot disease in strawberries, was evaluated under laboratory, greenhouse and field conditions. A real-time quantitative polymerase chain reaction was used to monitor expression of defense-related genes, which is essential to evaluate the potential of the manufactured nanoparticles to promote strawberry resistance against charcoal rot. The effect of Ag2 O nanoparticles on growth characteristics in strawberry plants was also studied. RESULTS The results showed that Ag2 O significantly inhibited M. phaseolina growth compared with untreated controls under in vitro conditions. Strawberry plants treated with Ag2 O showed a significant decrease in the severity of charcoal rot disease in the greenhouse compared with untreated plants. Strawberry plants treated with Ag2 O nanoparticles expressed defense gene (PR-1) involved in the salicylic acid signaling pathways at levels three to five times higher than in the control group. Ag2 O nanoparticles significantly improved the growth and yield of the strawberry crop. CONCLUSION Use of Ag2 O nanoparticles can be considered a new strategy to control M. phaseolina and this is the first report of this effect. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Aly Derbalah
- Pesticides Chemistry and Toxicology Department, Kafrelsheikh University, 33516, Kafr Elsheikh, Egypt
| | - Tarek Essa
- Plant Pathology Research Institute, Agricultural Research Center, Giza, 12619, Egypt
| | - Said Mohamed Kamel
- Plant Pathology Research Institute, Agricultural Research Center, Giza, 12619, Egypt
| | - Reda Ibrahim Omara
- Plant Pathology Research Institute, Agricultural Research Center, Giza, 12619, Egypt
| | - Mahmoud Abdelfatah
- Physics Department, Kafrelsheikh University, 33516, Kafr Elsheikh, Egypt
| | - Abdelhamed Elshaer
- Physics Department, Kafrelsheikh University, 33516, Kafr Elsheikh, Egypt
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4
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Chen D, He X, Chen X, Wang Z, Wang X. Bimetallic Au-Ag catalysts in HCHO catalytic oxidation: No synergetic effect? Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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5
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AuAg Nanoparticles Grafted on TiO 2@N-Doped Porous Carbon: Improved Depletion of Ciprofloxacin under Visible Light through Plasmonic Photocatalysis. NANOMATERIALS 2022; 12:nano12152524. [PMID: 35893492 PMCID: PMC9329855 DOI: 10.3390/nano12152524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/17/2022] [Accepted: 07/20/2022] [Indexed: 02/04/2023]
Abstract
TiO2 nanoparticles (NPs) were modified to obtain photocatalysts with different composition sophistication and displaying improved visible light activity. All of them were evaluated in the photodegradation of ciprofloxacin. The band gap of TiO2 NPs was successfully tailored by the formation of an N-doped porous carbon (NPC)-TiO2 nanohybrid through the pyrolysis of melamine at 600 °C, leading to a slight red-shift of the absorption band edge for nanohybrid NPC-TiO2 1. In addition, the in-situ formation and grafting of plasmonic AuAg NPs at the surface of NPC sheets and in close contact with TiO2 NPs leads to AuAg-NPC-TiO2 nanohybrids 2−3. These nanohybrids showed superior photocatalytic performance for the degradation of ciprofloxacin under visible light irradiation, compared to pristine P25 TiO2 NPs or to AuAg-PVP-TiO2 nanohybrid 4 in which polyvinylpyrrolidone stabilized AuAg NPs were directly grafted to TiO2 NPs. The materials were characterized by transmission electron microscope (TEM), High Angle Annular Dark Field—Scanning Transmission Electron Microscopy—Energy Dispersive X-ray Spectroscopy HAADF-STEM-EDS, X-ray photoelectron spectroscopy and solid UV-vis spectroscopy. Moreover, the active species involved in the photodegradation of ciprofloxacin using AuAg-NCS-TiO2 nanohybrids were evaluated by trapping experiments to propose a mechanism for the degradation.
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6
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Wan Q, Lin S, Guo H. Frustrated Lewis Pairs in Heterogeneous Catalysis: Theoretical Insights. Molecules 2022; 27:molecules27123734. [PMID: 35744860 PMCID: PMC9227528 DOI: 10.3390/molecules27123734] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/06/2022] [Accepted: 06/07/2022] [Indexed: 12/10/2022] Open
Abstract
Frustrated Lewis pair (FLP) catalysts have attracted much recent interest because of their exceptional ability to activate small molecules in homogeneous catalysis. In the past ten years, this unique catalysis concept has been extended to heterogeneous catalysis, with much success. Herein, we review the recent theoretical advances in understanding FLP-based heterogeneous catalysis in several applications, including metal oxides, functionalized surfaces, and two-dimensional materials. A better understanding of the details of the catalytic mechanism can help in the experimental design of novel heterogeneous FLP catalysts.
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Affiliation(s)
- Qiang Wan
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, China;
| | - Sen Lin
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, China;
- Correspondence: (S.L.); (H.G.)
| | - Hua Guo
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, NM 87131, USA
- Correspondence: (S.L.); (H.G.)
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7
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Ag/Ce0.5Zr0.5O2 nanofibers: Visible light photocatalysts for degradation of p-nitrophenol. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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García-Cruz R, Gonzalez-Torres J, Montoya-Moreno A, Domínguez-Soria V, Luna-García H, Poulain E, Arellano J, Olvera-Neria O. The π back-donation influence in CO oxidation on small and oxidized Au–Ag clusters. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Johnson HM, Dasher AM, Monahan M, Seifert S, Moreau LM. Mapping the effects of physical and chemical reduction parameters on local atomic distributions within bimetallic nanoparticles. NANOSCALE 2022; 14:4519-4530. [PMID: 35266465 DOI: 10.1039/d1nr06231j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Bimetallic nanoparticles prove advantageous over their monometallic counterparts due to the tunable, hybrid properties that result from combining different atomic species in a controlled way. The favorable optical and catalytic properties resulting from AgAu nanoparticle formation have been widely attributed to the existence of Ag-Au bonds, the maximization of which assumes the formation of a homogeneous alloy. Despite the importance of atomic scale structure in these systems, synthetic studies are typically not paired with structural characterization at the atomic scale. Herein, a comprehensive synthetic exploration of physical and chemical reduction parameters of resulting nanoparticle products is complemented with thorough X-ray characterization to probe how these parameters affect atomic scale alloy distributions within AgAu nanoparticles. Presented evidence shows Ag is substantially underincorporated into nanoparticle constructs compared with solution Ag : Au ratios regardless of precursor : reductant ratio or volume of reductant added. Both Ag and Au exhibit significant local clustering, with Ag distributed preferentially towards the nanoparticle surface. Most significantly, the results of this investigation suggest that reduction parameters alone can affect the local alloy distributions and homogeneity within bimetallic nanoparticles, even when the ratio of metallic precursors remains constant. Overall, this investigation presents the ability to control alloy distributions using kinetics and provides new considerations for optimizing synthetic methods to produce functional bimetallic nanoparticles.
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Affiliation(s)
- Hannah M Johnson
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA.
| | - Acacia M Dasher
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA.
| | - Madison Monahan
- Department of Chemistry, University of Washington, Seattle, WA 98195, USA
| | - Soenke Seifert
- X-ray Sciences Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Liane M Moreau
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA.
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10
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Miola M, Vernè E. In situ reduction of Ag on magnetic nanoparticles with gallic acid: effect of the synthesis parameters on morphology. Nanomedicine (Lond) 2022; 17:499-511. [PMID: 35293220 DOI: 10.2217/nnm-2021-0479] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Aim: Synthesis of Fe3O4-Ag composite nanoparticles (NPs) by a new in situ reduction of Ag NPs on the surface of Fe3O4 NPs using gallic acid as a reducing agent. Materials & methods: The influence of process parameters on NP morphology and functionalization was evaluated by means of field-emission scanning/scanning transmission electron microscopy and Fourier-transform IR spectroscopy. Results & conclusion: The synthesis conditions affected the morphology of the obtained NPs, evidence of the formation of polydispersed aggregates, nanoflower-like or nanodumbbell nanocomposites. In particular, well-defined nanodumbbells were obtained in aqueous media, with an NP/gallic acid ratio of 10:1, while the presence of a silica shell did not improve the morphology of Ag NPs nucleated on the Fe3O4 core.
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Affiliation(s)
- Marta Miola
- Department of Applied Science & Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino, 10129, Italy.,PolitoBioMED Lab, Politecnico di Torino, Politecnico di Torino, Via Piercarlo Boggio 59, Torino, 10138, Italy
| | - Enrica Vernè
- Department of Applied Science & Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino, 10129, Italy.,PolitoBioMED Lab, Politecnico di Torino, Politecnico di Torino, Via Piercarlo Boggio 59, Torino, 10138, Italy
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11
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Lee JD, Miller JB, Shneidman AV, Sun L, Weaver JF, Aizenberg J, Biener J, Boscoboinik JA, Foucher AC, Frenkel AI, van der Hoeven JES, Kozinsky B, Marcella N, Montemore MM, Ngan HT, O'Connor CR, Owen CJ, Stacchiola DJ, Stach EA, Madix RJ, Sautet P, Friend CM. Dilute Alloys Based on Au, Ag, or Cu for Efficient Catalysis: From Synthesis to Active Sites. Chem Rev 2022; 122:8758-8808. [PMID: 35254051 DOI: 10.1021/acs.chemrev.1c00967] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The development of new catalyst materials for energy-efficient chemical synthesis is critical as over 80% of industrial processes rely on catalysts, with many of the most energy-intensive processes specifically using heterogeneous catalysis. Catalytic performance is a complex interplay of phenomena involving temperature, pressure, gas composition, surface composition, and structure over multiple length and time scales. In response to this complexity, the integrated approach to heterogeneous dilute alloy catalysis reviewed here brings together materials synthesis, mechanistic surface chemistry, reaction kinetics, in situ and operando characterization, and theoretical calculations in a coordinated effort to develop design principles to predict and improve catalytic selectivity. Dilute alloy catalysts─in which isolated atoms or small ensembles of the minority metal on the host metal lead to enhanced reactivity while retaining selectivity─are particularly promising as selective catalysts. Several dilute alloy materials using Au, Ag, and Cu as the majority host element, including more recently introduced support-free nanoporous metals and oxide-supported nanoparticle "raspberry colloid templated (RCT)" materials, are reviewed for selective oxidation and hydrogenation reactions. Progress in understanding how such dilute alloy catalysts can be used to enhance selectivity of key synthetic reactions is reviewed, including quantitative scaling from model studies to catalytic conditions. The dynamic evolution of catalyst structure and composition studied in surface science and catalytic conditions and their relationship to catalytic function are also discussed, followed by advanced characterization and theoretical modeling that have been developed to determine the distribution of minority metal atoms at or near the surface. The integrated approach demonstrates the success of bridging the divide between fundamental knowledge and design of catalytic processes in complex catalytic systems, which can accelerate the development of new and efficient catalytic processes.
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Affiliation(s)
- Jennifer D Lee
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Jeffrey B Miller
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Anna V Shneidman
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Lixin Sun
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Jason F Weaver
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Joanna Aizenberg
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States.,John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States.,Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Juergen Biener
- Nanoscale Synthesis and Characterization Laboratory, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - J Anibal Boscoboinik
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Alexandre C Foucher
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Anatoly I Frenkel
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States.,Division of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Jessi E S van der Hoeven
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States.,John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Boris Kozinsky
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Nicholas Marcella
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Matthew M Montemore
- Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, Louisiana 70118, United States
| | - Hio Tong Ngan
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Christopher R O'Connor
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Cameron J Owen
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States.,John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Dario J Stacchiola
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Eric A Stach
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Robert J Madix
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Philippe Sautet
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States.,Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Cynthia M Friend
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States.,John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
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12
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Park JW, Choi W, Noh J, Park W, Gu GH, Park J, Jung Y, Song H. Bimetallic Gold-Silver Nanostructures Drive Low Overpotentials for Electrochemical Carbon Dioxide Reduction. ACS APPLIED MATERIALS & INTERFACES 2022; 14:6604-6614. [PMID: 35077146 DOI: 10.1021/acsami.1c20852] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Alloy formation is an advanced approach to improve desired properties that the monoelements cannot achieve. Alloys are usually designed to tailor intrinsic natures or induce synergistic effects by combining materials with distinct properties. Indeed, unprecedented properties have emerged in many cases, superior to a simple sum of pure elements. Here, we present Au-Ag alloy nanostructures with prominent catalytic properties in an electrochemical carbon dioxide reduction reaction (eCO2RR). The Au-Ag hollow nanocubes are prepared by galvanic replacement of Au on Ag nanocubes. When the Au-to-Ag ratio is 1:1 (Au1Ag1), the alloy hollow nanocubes exhibit maximum Faradaic efficiencies of CO production in a wide potential range and high mass activity and CO current density superior to those of the bare metals. In particular, overpotentials are estimated to be similar to or lower than that of the Au catalyst under various standard metrics. Density functional theory calculations, machine learning, and a statistical consideration demonstrate that the optimal configuration of the *COOH intermediate is a bidentate coordination structure where C binds to Au and O binds to Ag. This active Au-Ag neighboring configuration has a maximum population and enhanced intrinsic catalytic activity on the Au1Ag1 surface among other Au-to-Ag compositions, in good agreement with the experimental results. Further application of Au1Ag1 to a membrane electrode assembly cell at neutral conditions shows enhanced CO Faradaic efficiency and current densities compared to Au or Ag nanocubes, indicating the possible extension of Au-Ag alloys to larger electrochemical systems. These results give a new insight into the synergistic roles of Au and Ag in the eCO2RR and offer a fresh direction toward a rational design of bimetallic catalysts at a practical scale.
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Affiliation(s)
- Joon Woo Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Woong Choi
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Juhwan Noh
- Department of Chemical and Biomolecular Engineering (BK21 Four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Woonghyeon Park
- Department of Chemical and Biomolecular Engineering (BK21 Four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Geun Ho Gu
- Department of Chemical and Biomolecular Engineering (BK21 Four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Jonghyeok Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Yousung Jung
- Department of Chemical and Biomolecular Engineering (BK21 Four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Hyunjoon Song
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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13
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Taherkhani F, Fortunelli A. Chemical ordering and temperature effects on the thermal conductivity of Ag–Au and Ag–Pd bimetallic bulk and nanocluster systems. NEW J CHEM 2022. [DOI: 10.1039/d2nj02899a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Understanding the heat transfer mechanisms in bimetallic nanoparticles, e.g. to promote heat transfer in a nanofluid, is a significant problem for industrial and fluid mechanics related applications.
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Affiliation(s)
- Farid Taherkhani
- Departments of Production Engineering, Universität Bremen, Bibliothekstraße 1, 28359, Germany
- Universtät Bremen, Energiespeicher-und Energiewandlersysteme, Bibliotechkstraße 1, Bremen, 28359, Germany
| | - Alessandro Fortunelli
- CNR-ICCOM, Istituto per la Chimica dei Composti Organometallici del Consiglio Nazionale delle Ricerche, via G. Moruzzi 1, 56124, Pisa, Italy
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14
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Yu X, Williams CT. Recent Advances in the Applications of Mesoporous Silica in Heterogenous Catalysis. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00001f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mesoporous silica is a class of silica material with a large specific surface area, high specific pore volume and meso-sized pores. These properties make mesoporous silica a good choice of...
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15
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Huang L, Liu W, Hu J, Xing X. Exploring the Effects of a Doping Silver Atom on Anionic Gold Clusters' Reactivity with O 2. J Phys Chem A 2021; 125:9995-10005. [PMID: 34784715 DOI: 10.1021/acs.jpca.1c06507] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reactivities of AgAun-1- (n = 3-10) with O2 at a low temperature were studied using an instrument combining a magnetron sputter cluster source, a microflow reactor, and a time-of-flight mass spectrometer. Their reaction products as well as size-dependent kinetic rates were nearly identical to those of corresponding Aun- (n = 3-10). Previous experiments showed that the Ag atom in AgAun-1- (n = 3-10) was fully or partially enclosed by the gold atoms. We studied the adsorption of O2 on these reported structures using the B3LYP theory with relatively large basis sets. The theoretical results indicate that the adsorption sites as well as the adsorption energies of O2 on AgAun-1- (n = 3-10) are nearly identical to those on the corresponding Aun- (n = 3-10). The O2 adsorption on a series of proposed isomers of AgAun-1- (denoted as Aun-1Ag-), in which the silver atom was on the protruding site, was explored using the same theoretical methods. The O2 tends to bond with the protruding Ag atoms, and the binding energies are apparently higher than those on the corresponding Aun- and AgAun-1-. The adsorption and activation of O2 on Aun-, AgAun-1-, and Aun-1Ag- were correlated with their global electron detachment energies (VDEs) as well as the element types of the adsorption sites. Generally, low VDE values and silver sites facilitate the O2 adsorption, and these two factors separately dominate in various cluster species. The revealed effects of a doping silver atom in small gold clusters are helpful to understand the role of the residual silver components in many nano gold catalysts.
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Affiliation(s)
- Lulu Huang
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. China
| | - Wen Liu
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. China
| | - Jin Hu
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. China
| | - Xiaopeng Xing
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. China
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Effect of the Metal Deposition Order on Structural, Electronic and Catalytic Properties of TiO2-Supported Bimetallic Au-Ag Catalysts in 1-Octanol Selective Oxidation. Catalysts 2021. [DOI: 10.3390/catal11070799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Au and Ag were deposited on TiO2 modified with Ce, La, Fe or Mg in order to obtain bimetallic catalysts to be used for liquid-phase oxidation of 1-octanol. The effects of the deposition order of gold and silver, and the nature of the support modifying additives and redox pretreatments on the catalytic properties of the bimetallic Au-Ag catalysts were studied. Catalysts were characterized by low-temperature nitrogen adsorption–desorption, energy dispersive spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, high-resolution transmission electron microscopy and ultraviolet-visible diffuse reflectance spectroscopy. It was found that pretreatments with hydrogen and oxygen at 300 °C significantly decreased the activity of AuAg catalysts (silver was deposited first) and had little effect on the catalytic properties of AgAu samples (gold was deposited first). The density functional theory method demonstrated that the adsorption energy of 1-octanol increased for all positively charged AuxAgyq (x + y = 10, with a charge of q = 0 or +1) clusters compared with the neutral counterparts. Lanthanum oxide was a very effective promoter for both monometallic and bimetallic gold and silver catalysts in the studied process.
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17
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Mo S, Peng P, Pei Y, Shen T, Xie Q, Fu M, Chen Y, Ye D. Immobilizing ultrafine bimetallic PtAg alloy onto uniform MnO2 microsphere as a highly active catalyst for CO oxidation. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.11.062] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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18
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Zhu B, Zhang LY, Liu JL, Zhang XM, Li XS, Zhu AM. TiO 2-supported Au-Ag plasmonic nanocatalysts achieved by plasma restructuring and activation. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123508. [PMID: 32721641 DOI: 10.1016/j.jhazmat.2020.123508] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 06/29/2020] [Accepted: 07/15/2020] [Indexed: 06/11/2023]
Abstract
Plasmonic Au-Ag/TiO2 bimetallic nanocatalyst is regarded as a promising visible-light (VL) photocatalyst due to its wide light absorption and potentially enhanced activity. For its preparation, Au precursors usually contain Cl and co-impregnation/co-deposition suffers from AgCl precipitation, and consequently Au and Ag have to be sequentially supported. However, Au and Ag species of the sequential preparation are individually isolated and difficult to be homogeneously mixed. Here we report an Au-Ag plasmonic nanocatalyst achieved by plasma restructuring and activation from the sequential preparation. The isolated cationic Au and Ag species on the sequentially-prepared Au-Ag/TiO2 sample are restructured to be homogeneously mixed and highly activated by O2 plasma, which can be partially auto-reduced to Au-Ag bimetallic nanoparticles within the induction period of a few minutes in VL photocatalytic oxidation of CO. The Au-Ag plasmonic nanocatalyst exhibits a strongly enhanced activity in the VL photocatalytic reaction. The contribution of O2 plasma treatment and the enhancement mechanism for the Au-Ag plasmonic nanocatalyst are disclosed.
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Affiliation(s)
- Bin Zhu
- College of Environmental Sciences and Engineering, Dalian Maritime University, Dalian, 116026, China
| | - Lu-Yao Zhang
- College of Environmental Sciences and Engineering, Dalian Maritime University, Dalian, 116026, China
| | - Jing-Lin Liu
- College of Environmental Sciences and Engineering, Dalian Maritime University, Dalian, 116026, China; Laboratory of Plasma Physical Chemistry, Dalian University of Technology, Dalian, 116024, China
| | - Xiao-Min Zhang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Xiao-Song Li
- Laboratory of Plasma Physical Chemistry, Dalian University of Technology, Dalian, 116024, China
| | - Ai-Min Zhu
- Laboratory of Plasma Physical Chemistry, Dalian University of Technology, Dalian, 116024, China.
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19
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X-ray Photoelectron Spectra of Ag-Au Colloidal Nanoparticles after Interaction with Linear Carbon Chains. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11020685] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The results of X-ray photoelectron spectra (XPS) characterization of the surface of Ag-Au colloidal nanoparticles (Ag-Au NPs), prepared by laser ablation in water before and after interaction with linear carbon chains (LCC), are presented. No additional features appear in high-energy resolved XPS core level spectra of Ag-Au NPs which indicates that surface is not oxidized. The measurements of XPS Ag 3d-spectrum of (Ag-Au)@LCC manifests the additional low-energy structure that is associated with the formation of Ag–C bonds. The charge transfer between Au atoms on the NPs surface and LCC was established. Additionally, some oxidation of the Ag atoms on the surface of (Ag-Au)@LCC is observed which arises during laser ablation in water. We assume that oxidative species will preferably interact with the areas outside the LCC instead of oxidizing the carbon chains which was confirmed by XPS C 1s spectra.
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20
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Zhao G, Zou J, Zhang T, Li C, Zhou S, Jiao F. Recent progress on removal of indoor air pollutants by catalytic oxidation. REVIEWS ON ENVIRONMENTAL HEALTH 2020; 35:311-321. [PMID: 32598323 DOI: 10.1515/reveh-2019-0102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Accepted: 05/11/2020] [Indexed: 06/11/2023]
Abstract
Indoor air pollutant is a serious problem due to its wide diversity and variability. The harmful substances from construction materials and decorative materials may make the indoor air pollution become more and more serious and cause serious health problems. In this paper, the review summarizes the advanced technologies for the removal of indoor air pollutants and the development in the treatment of indoor air pollution by catalytic oxidation technologies. Meanwhile, some catalytic oxidation mechanisms of indoor air pollutants are proposed in detail, and suggestions for the indoor air pollution treatment are also presented, in order to provide some reference for subsequent research.
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Affiliation(s)
- Guoqing Zhao
- School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China
| | - Jiao Zou
- School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China
| | - Taiheng Zhang
- School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China
| | - Caifeng Li
- School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China
| | - Shu Zhou
- School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China
| | - Feipeng Jiao
- School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China
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21
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Wisniewska J, Grzelak K, Huang SP, Sobczak I, Yang CM, Ziolek M. The influence of Zr presence in short channel SBA-15 on state and activity of metallic modifiers (Ag, Au, Cu, Fe). Catal Today 2020. [DOI: 10.1016/j.cattod.2019.05.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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22
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Kaskow I, Sobczak I, Yang CM, Ziolek M. Bimetallic gold-silver catalysts based on ZnO and Zn/SBA-15 – The effect of various treatments on surface and catalytic properties. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.06.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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23
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Kaskow I, Wojtaszek-Gurdak A, Sobczak I. Methanol oxidation on AuAg-Zn/MCM-36 – The effect of catalyst components and pretreatment. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.04.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Meng X, Yan R, Zuo S, Zhang Y, Li Z, Wang H. Synthesis of Bimetallic Au-Ag/CMK-3 Catalysts and Their Catalytic Activity for the Oxidation of Amino Alcohol. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c01694] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiangzhan Meng
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Ruiyi Yan
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Shouwei Zuo
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Yongqiang Zhang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Zengxi Li
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Hui Wang
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P.R. China
- Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, P.R. China
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25
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A novel modification method via in-situ reduction of AuAg bimetallic nanoparticles by polydopamine on carbon fiber microelectrode for H2O2 detection. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104595] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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26
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Abu-Safe HH, Al-Esseili R, El-Nasser H, Sarollahi M, Refaei M, Zamani-Alavijeh M, Naseem H, Ware ME. Au-Ag-Al Nano-Alloy Thin Films as an Advanced Material for Photonic Applications: XPS Analysis, Linear and Nonlinear Optical Properties Under CW Regime. CRYSTAL RESEARCH AND TECHNOLOGY 2020. [DOI: 10.1002/crat.201900228] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Husam H. Abu-Safe
- School of Basic Sciences and Humanities; German Jordanian University; Amman 11180 Jordan
| | - Razan Al-Esseili
- School of Basic Sciences and Humanities; German Jordanian University; Amman 11180 Jordan
| | - Husam El-Nasser
- Physics Department; Al al-Bayt University; Mafraq 25113 Jordan
| | - Mirsaeid Sarollahi
- Department of Electrical Engineering; University of Arkansas; Fayetteville AR 72701 USA
| | - Malak Refaei
- Institute for Nanoscience and Engineering; University of Arkansas; Fayetteville AR 72701 USA
| | | | - Hameed Naseem
- Department of Electrical Engineering; University of Arkansas; Fayetteville AR 72701 USA
| | - Morgan E. Ware
- Department of Electrical Engineering; University of Arkansas; Fayetteville AR 72701 USA
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27
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Nellaiappan S, Katiyar NK, Kumar R, Parui A, Malviya KD, Pradeep KG, Singh AK, Sharma S, Tiwary CS, Biswas K. High-Entropy Alloys as Catalysts for the CO2 and CO Reduction Reactions: Experimental Realization. ACS Catal 2020. [DOI: 10.1021/acscatal.9b04302] [Citation(s) in RCA: 120] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Subramanian Nellaiappan
- Department of Chemistry, Indian Institute of Technology Gandhinagar, Gandhinagar 382355, India
| | - Nirmal Kumar Katiyar
- Department of Materials Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Ritesh Kumar
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Arko Parui
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Kirtiman Deo Malviya
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - K. G. Pradeep
- Department of Materials Science and Metallurgical Engineering, Indian Institute of Technology Madras, Chennai 600036, India
| | - Abhishek K. Singh
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Sudhanshu Sharma
- Department of Chemistry, Indian Institute of Technology Gandhinagar, Gandhinagar 382355, India
| | - Chandra Sekhar Tiwary
- Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 382355, India
| | - Krishanu Biswas
- Department of Materials Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
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28
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Kavyani S, Baharfar R. Design and characterization of Fe
3
O
4
/GO/Au‐Ag nanocomposite as an efficient catalyst for the green synthesis of spirooxindole‐dihydropyridines. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5560] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Sara Kavyani
- Faculty of ChemistryUniversity of Mazandaran 4741695447 Babolsar Iran
| | - Robabeh Baharfar
- Faculty of ChemistryUniversity of Mazandaran 4741695447 Babolsar Iran
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29
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Kaskow I, Sobczak I, Ziolek M, Corberán VC. The effect of support properties on n-octanol oxidation performed on gold – silver catalysts supported on MgO, ZnO and Nb2O5. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2019.110674] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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30
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The Use of Tunable Optical Absorption Plasmonic Au and Ag Decorated TiO2 Structures as Efficient Visible Light Photocatalysts. Catalysts 2020. [DOI: 10.3390/catal10010139] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Exploring solar-excited heterogeneous photocatalysts by taking advantage of surface plasmon resonance (SPR) has drawn growing research attention. As it could help to pave the way for global sustainable development. The decoration of TiO2 particles with noble metals possessing SPR effects is regarded as one of the most effective solutions. The perfect match of the SPR absorption band with the spectrum of incident light is an essential factor for plasmonic enhancement. However, modifying with sole noble metal is often limited as it tunes wavelength of only several nanometers. To overcome this drawback, an alternative approach can be offered by decoration with more than one noble metal. For instance, Au-Ag co-decoration displays greatly adjustable, composition-dependent SPR agent over a broad range of the visible light spectrum (ca. from 415 to 525 nm). Hence Au-Ag complex is a remarkable candidate for tuning the photo adsorption of TiO2 from UV to visible light. This study presents a novel and tailored method for the fabrication of Au-Ag co-modified TiO2 particles, and how Au-Ag dependent SPR was applied as the visible light-responsive TiO2 based photocatalysts in a simple but reliable way. The fabricated Au-Ag co-decorated TiO2 (AuxAg(1−x)/TiO2) was characterized and proved to own excellent stability and large specific surface area. The optimization of these particles against the wavelength of maximal solar light intensity was confirmed by photo degradation of methylene blue under visible light radiation. This work may provide further insight into the design of TiO2-based composites with improved photocatalytic properties for environmental remediation and renewable energy utilization.
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31
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Liu M, Yu T, Huang R, Qi W, He Z, Su R. Fabrication of nanohybrids assisted by protein-based materials for catalytic applications. Catal Sci Technol 2020. [DOI: 10.1039/c9cy02466b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Protein units and architectures were applied as supports in the synthesis of metal and metal oxide nanoparticles for environmentally benign catalytic applications.
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Affiliation(s)
- Mingyue Liu
- School of Pharmaceutical and Chemical Engineering
- Taizhou University
- Taizhou 318000
- China
| | - Tao Yu
- State Key Laboratory of Chemical Engineering
- Tianjin Key Laboratory of Membrane Science and Desalination Technology
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
| | - Renliang Huang
- School of Environmental Science and Engineering
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Wei Qi
- State Key Laboratory of Chemical Engineering
- Tianjin Key Laboratory of Membrane Science and Desalination Technology
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
| | - Zhimin He
- State Key Laboratory of Chemical Engineering
- Tianjin Key Laboratory of Membrane Science and Desalination Technology
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
| | - Rongxin Su
- State Key Laboratory of Chemical Engineering
- Tianjin Key Laboratory of Membrane Science and Desalination Technology
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
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32
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Xiao Z, Chen J, Duan S, Lv X, Wang J, Ma X, Tang J, Wang W. Bimetallic coatings synergistically enhance the speeds of photocatalytic TiO2 micromotors. Chem Commun (Camb) 2020; 56:4728-4731. [DOI: 10.1039/d0cc00212g] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A bimetallic cap containing sputtered silver is a better catalyst that significantly improves the performance of catalytically powered micromotors.
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Affiliation(s)
- Zuyao Xiao
- School of Materials Science and Engineering
- Harbin Institute of Technology (Shenzhen)
- Shenzhen
- China
| | - Jingyuan Chen
- School of Materials Science and Engineering
- Harbin Institute of Technology (Shenzhen)
- Shenzhen
- China
| | - Shifang Duan
- School of Materials Science and Engineering
- Harbin Institute of Technology (Shenzhen)
- Shenzhen
- China
| | - Xianglong Lv
- School of Materials Science and Engineering
- Harbin Institute of Technology (Shenzhen)
- Shenzhen
- China
| | - Jizhuang Wang
- Department of Chemistry
- The University of Hong Kong
- Hong Kong 999077
- China
| | - Xing Ma
- School of Materials Science and Engineering
- Harbin Institute of Technology (Shenzhen)
- Shenzhen
- China
- Flexible Printed Electronic Technology Center
| | - Jinyao Tang
- Department of Chemistry
- The University of Hong Kong
- Hong Kong 999077
- China
- State Key Laboratory of Synthetic Chemistry
| | - Wei Wang
- School of Materials Science and Engineering
- Harbin Institute of Technology (Shenzhen)
- Shenzhen
- China
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33
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Smirnov MY, Kalinkin AV, Klembovsky IO, Bukhtiyarov VI. Changes in the Spatial Distribution of Metals Under the Influence of Reaction Medium in the System Formed by a Gold Film Supported on the Surface of a Silver Foil. J STRUCT CHEM+ 2019. [DOI: 10.1134/s0022476619110106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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34
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Chen S, Liang S, Wu B, Lan Z, Guo Z, Kobayashi H, Yan X, Li R. Ultrasmall Silver Clusters Stabilized on MgO for Robust Oxygen-Promoted Hydrogen Production from Formaldehyde Reforming. ACS APPLIED MATERIALS & INTERFACES 2019; 11:33946-33954. [PMID: 31462039 DOI: 10.1021/acsami.9b11023] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Efficient molecular hydrogen generation from renewable biomass-derived resources and water is of great importance to the sustainable development of the future society. Herein, ultrasmall Ag nanoclusters supported on a defect-rich MgO matrix (AgUCs/MgO) are synthesized by a facile impregnation/calcination method and are applied to robust oxygen-promoted formaldehyde reforming into H2 at room temperature. Density functional theory calculations and experimental observations show that the catalyst spatially builds up a channel for directional electron transfer from electron-rich Ag sites to the anti-bonding π orbital of chemisorbed bridged O2 molecules, leading to the implementation of low-temperature O2 adsorption and activation. The catalytically active species, •OOH, is thus selectively generated via a preferential two-electron reduction of O2 with a low energy barrier on Ag sites, involving an unusual long-range proton-coupled electron transfer process. The •OOH-AgUCs/MgO active center is efficient for the subsequent C-H activation and H2 generation, leading to a 3-fold improvement of the turnover frequency as compared with its analogous AgNPs/MgO catalyst. Our atomic-level design and synthetic strategy provide a platform that facilitates the construction of an electron-proton transfer channel for catalysis, altered adsorption configurations of activated reactants, and enhancement of catalytic hydrogen generation activity, extending a promising direction for the development of next-generation energy catalysts.
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Affiliation(s)
- Shuang Chen
- Department of Materials Engineering, College of Material and Textiles , Zhejiang Sci-Tech University , Hangzhou 310018 , China
| | - Shipan Liang
- Department of Materials Engineering, College of Material and Textiles , Zhejiang Sci-Tech University , Hangzhou 310018 , China
| | - Biling Wu
- Department of Materials Engineering, College of Material and Textiles , Zhejiang Sci-Tech University , Hangzhou 310018 , China
| | - Zhuohuang Lan
- Department of Materials Engineering, College of Material and Textiles , Zhejiang Sci-Tech University , Hangzhou 310018 , China
| | - Ziwei Guo
- Department of Materials Engineering, College of Material and Textiles , Zhejiang Sci-Tech University , Hangzhou 310018 , China
| | - Hisayoshi Kobayashi
- Emeritus Professor of Department of Chemistry and Materials Technology , Kyoto Institute of Technology , Matsugasaki , Sakyo-ku, Kyoto 606-8585 , Japan
| | - Xiaoqing Yan
- Department of Chemistry, College of Science , Zhejiang Sci-Tech University , Hangzhou 310018 , China
| | - Renhong Li
- Department of Materials Engineering, College of Material and Textiles , Zhejiang Sci-Tech University , Hangzhou 310018 , China
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35
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Luo B, Wu T, Zhang L, Diao F, Zhang Y, Ci L, Ulstrup J, Zhang J, Si P. Monometallic nanoporous nickel with high catalytic performance towards hydrazine electro-conversion and its DFT calculations. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.05.123] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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Silver catalysts for liquid-phase oxidation of alcohols in green chemistry: Challenges and outlook. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.06.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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37
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Joshi N, da Silva LF, Shimizu FM, Mastelaro VR, M'Peko JC, Lin L, Oliveira ON. UV-assisted chemiresistors made with gold-modified ZnO nanorods to detect ozone gas at room temperature. Mikrochim Acta 2019; 186:418. [PMID: 31187269 DOI: 10.1007/s00604-019-3532-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 05/19/2019] [Indexed: 11/25/2022]
Abstract
Two kinds of flexible ozone (O3) sensors were obtained by placing pristine ZnO nanorods and gold-modified ZnO nanorods (NRs) on a bi-axially oriented poly(ethylene terephthalate) substrate. The chemiresistive sensor is operated at typically 1 V at room temperature under the UV-light illumination. The ZnO nanorods were prepared via a hydrothermal route and have a highly crystalline wurtzite structure, with diameters ranging between 70 and 300 nm and a length varying from 1 to 3 μm. The ZnO NRs were then coated with a ca. 10 nm gold layer whose presence was confirmed with microscopy analysis. This sensor is found to be superior to detect ozone at a room temperature. Typical figures of merit include (a) a sensor response of 108 at 30 ppb ozone for gold-modified ZnO NRs, and (b) a linear range that extends from 30 to 570 ppb. The sensor is stable, reproducible and selective for O3 compared to other oxidizing and reducing gases. The enhanced performance induced by the modification of ZnO nanorods with thin layer of gold is attributed to the increased reaction kinetics compared to pristine ZnO NRs. The sensing mechanism is assumed to be based on the formation of a nano-Schottky type barrier junction at the interface between gold and ZnO. Graphical abstract Room temperature, flexible UV-enhanced gold modified ZnO nanorods can detect ppb levels of ozone.
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Affiliation(s)
- Nirav Joshi
- São Carlos Institute of Physics, University of São Paulo, 369, São Carlos, São Paulo, CP, 13560-970, Brazil.
- Department of Mechanical Engineering, University of California, Berkeley, CA, USA.
| | - Luís F da Silva
- Department of Physics, Federal University of São Carlos, Rodovia Washington Luis km 235, São Carlos, SP, 13565-905, Brazil
| | - Flavio M Shimizu
- São Carlos Institute of Physics, University of São Paulo, 369, São Carlos, São Paulo, CP, 13560-970, Brazil
- Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, São Paulo, 13083-970, Brazil
| | - Valmor R Mastelaro
- São Carlos Institute of Physics, University of São Paulo, 369, São Carlos, São Paulo, CP, 13560-970, Brazil
| | - Jean-Claude M'Peko
- São Carlos Institute of Physics, University of São Paulo, 369, São Carlos, São Paulo, CP, 13560-970, Brazil
| | - Liwei Lin
- Department of Mechanical Engineering, University of California, Berkeley, CA, USA.
| | - Osvaldo N Oliveira
- São Carlos Institute of Physics, University of São Paulo, 369, São Carlos, São Paulo, CP, 13560-970, Brazil.
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38
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The role of gold dopant in AP-Nb/MCF and AP-MCF on the Knoevenagel condensation of ethyl cyanoacetate with benzaldehyde and 2,4-dichlorobenzaldehyde. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.07.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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39
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Shimasaki Y, Kitahara M, Shoji M, Shimojima A, Wada H, Kuroda K. Preparation of Ordered Mesoporous Au using Double Gyroid Mesoporous Silica KIT-6 via a Seed-Mediated Growth Process. Chem Asian J 2018; 13:3935-3941. [PMID: 30398026 DOI: 10.1002/asia.201801455] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 10/30/2018] [Indexed: 11/07/2022]
Abstract
Ordered mesoporous Au was prepared using double gyroid (cubic Ia-3d) mesoporous silica KIT-6 as a template. The Au frameworks were formed within the template via a seed-mediated growth process. Au nanoparticles were initially prepared as seeds within the mesopores, and subsequently, they were grown under mild and controlled reducing conditions. The transmission electron micrographs and scanning electron micrographs of mesoporous Au after the removal of the template revealed the formation of mesoporous Au replicas. The small-angle X-ray scattering pattern of mesoporous Au reveals that the obtained mesoporous Au has a cubic I41 32 mesostructure, which is different from that of the original template, implying that Au was deposited within only one mesochannel of the two interconnected ones. The seed-mediated growth process is a key factor in the successful formation of ordered mesoporous Au using a mesoporous silica template. Our preparative method can serve as a guide for further development of synthetic and materials chemistry of mesoporous Au.
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Affiliation(s)
- Yuta Shimasaki
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Ohkubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Masaki Kitahara
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Ohkubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Miho Shoji
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Ohkubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Atsushi Shimojima
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Ohkubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Hiroaki Wada
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Ohkubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Kazuyuki Kuroda
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Ohkubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan.,Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, Nishiwaseda-2, Shinjuku-ku, Tokyo, 169-0051, Japan
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Yonezawa T, Čempel D, Nguyen MT. Microwave-Induced Plasma-In-Liquid Process for Nanoparticle Production. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20180285] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Tetsu Yonezawa
- Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
| | - David Čempel
- Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
| | - Mai Thanh Nguyen
- Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
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41
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Zhang Y, Deng D, Zhu X, Liu S, Zhu Y, Han L, Luo L. Electrospun bimetallic Au-Ag/Co3O4 nanofibers for sensitive detection of hydrogen peroxide released from human cancer cells. Anal Chim Acta 2018; 1042:20-28. [DOI: 10.1016/j.aca.2018.07.065] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 07/13/2018] [Accepted: 07/26/2018] [Indexed: 02/08/2023]
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Feng X, Yang J, Duan X, Cao Y, Chen B, Chen W, Lin D, Qian G, Chen D, Yang C, Zhou X. Enhanced Catalytic Performance for Propene Epoxidation with H2 and O2 over Bimetallic Au–Ag/Uncalcined Titanium Silicate-1 Catalysts. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01324] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiang Feng
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China
| | - Jia Yang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Xuezhi Duan
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yueqiang Cao
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Bingxu Chen
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Wenyao Chen
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Dong Lin
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China
| | - Gang Qian
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - De Chen
- Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim 7491, Norway
| | - Chaohe Yang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China
| | - Xinggui Zhou
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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43
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Barroso-Martín I, Infantes-Molina A, Talon A, Storaro L, Rodríguez-Aguado E, Rodríguez-Castellón E, Moretti E. CO Preferential Photo-Oxidation in Excess of Hydrogen in Dark and Simulated Solar Light Irradiation over AuCu-Based Catalysts on SBA-15 Mesoporous Silica-Titania. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1203. [PMID: 30011796 PMCID: PMC6073442 DOI: 10.3390/ma11071203] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 06/26/2018] [Accepted: 07/10/2018] [Indexed: 12/13/2022]
Abstract
In this work, SBA-15 silica and silica-titania have been used as supports for photocatalysts based on AuCu alloy (Au:Cu = 1) to be used in the preferential oxidation of CO (CO-PROX) in excess of hydrogen at room temperature and atmospheric pressure both in the dark and under simulated solar light irradiation. To study their textural, structural, chemical and optical properties, the samples were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), adsorption-desorption of N₂ at -196 °C, 13C and 29Si solid state nuclear magnetic resonance (NMR), X-ray photoelectron spectroscopy (XPS) and diffuse reflectance ultraviolet-visible (DRUV-vis) spectroscopy. Titanium was present mainly in the form of titania aggregates, but also as small particles interacting with the SBA support. In both catalysts, the metal alloy nanoparticles displayed an average size of 4 nm as demonstrated by TEM measurements. AuCu/Ti-SBA turned out to be photoactive and selective in the photo-CO-PROX reaction showing the highest activity, with conversion and selectivity towards CO₂ of 80%, due both to the presence of titania incorporated in SBA-15 and to the synergistic effect of Cu when alloyed with Au.
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Affiliation(s)
- Isabel Barroso-Martín
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
| | - Antonia Infantes-Molina
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
| | - Aldo Talon
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, National Interuniversity Consortium of Materials Science and Technology (INSTM) Venice Research Unit, Via Torino 155/B, Mestre, 30172 Venezia, Italy.
| | - Loretta Storaro
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, National Interuniversity Consortium of Materials Science and Technology (INSTM) Venice Research Unit, Via Torino 155/B, Mestre, 30172 Venezia, Italy.
| | - Elena Rodríguez-Aguado
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
| | - Enrique Rodríguez-Castellón
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
| | - Elisa Moretti
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, National Interuniversity Consortium of Materials Science and Technology (INSTM) Venice Research Unit, Via Torino 155/B, Mestre, 30172 Venezia, Italy.
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Barroso-Martín I, Moretti E, Talon A, Storaro L, Rodríguez-Castellón E, Infantes-Molina A. Au and AuCu Nanoparticles Supported on SBA-15 Ordered Mesoporous Titania-Silica as Catalysts for Methylene Blue Photodegradation. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E890. [PMID: 29799498 PMCID: PMC6025472 DOI: 10.3390/ma11060890] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 05/18/2018] [Accepted: 05/22/2018] [Indexed: 01/14/2023]
Abstract
The photocatalytic degradation of methylene blue (MB) dye has been performed under UV irradiation in aqueous suspension, employing photocatalysts based on Au (1.5 wt %) and AuCu (Au/Cu = 1, 2.0 wt %), and supported on SBA-15-ordered mesoporous silica, with and without titania (Si/Ti = 3), in order to evaluate the versatility of this mesoporous support in this type of reaction of great impact from the environmental point of view. Samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N₂ adsorption-desorption at -196 °C, and X-ray photoelectron spectroscopy (XPS), so as to study their structural, optical, and chemical properties. All the prepared catalysts were found to be active in the test reaction. The bimetallic AuCu-based catalysts attained very high MB degradation values, in particular AuCu/SBA-15 titania-silica sample reached 100% of dye oxidation after the monitored reaction period (120 min).
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Affiliation(s)
- Isabel Barroso-Martín
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
| | - Elisa Moretti
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, National Interuniversity Consortium of Materials Science and Technology (INSTM) Venice Research Unit, Via Torino 155/B, 30172 Mestre Venezia, Italy.
| | - Aldo Talon
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, National Interuniversity Consortium of Materials Science and Technology (INSTM) Venice Research Unit, Via Torino 155/B, 30172 Mestre Venezia, Italy.
| | - Loretta Storaro
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, National Interuniversity Consortium of Materials Science and Technology (INSTM) Venice Research Unit, Via Torino 155/B, 30172 Mestre Venezia, Italy.
| | - Enrique Rodríguez-Castellón
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
| | - Antonia Infantes-Molina
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
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45
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Suwannarat K, Thongthai K, Ananta S, Srisombat L. Synthesis of hollow trimetallic Ag/Au/Pd nanoparticles for reduction of 4-nitrophenol. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.12.046] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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46
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Kang JS, Sohn Y, Pradhan D, Leung KT. Bimetallic Au@M (M = Ag, Pd, Fe, and Cu) Nanoarchitectures Mediated by 1,4-Phenylene Diisocyanide Functionalization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:2849-2855. [PMID: 29400974 DOI: 10.1021/acs.langmuir.7b02705] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Hybridization with gold has attracted a lot of attention in many application areas such as energy, nanomedicine, and catalysts. Here, we demonstrate electrochemical hybridization of two different metals by using bare and 1,4-phenylene diisocyanide (PDI) functionalized gold nanoislands (GNIs) supported on a Si substrate. As pristine GNIs are not tightly locked on the Si surface, bimetallic Au@M (M = Ag, Pd, Fe, and Cu) core-shell type nanostructures are produced by an electric-field-induced clustering of GNIs and metal deposition. On the other hand, upon functionalization of GNIs by PDI, 3D island growth on the functionalized GNI template is observed as PDI acts as a protector against the electric-field-induced clustering. Depth-profiling X-ray photoelectron spectroscopy reveals no discernible difference in the interfacial electronic structures of hybrid metals prepared by using pristine and PDI-functionalized GNI templates. This work demonstrates a new approach to produce a secured template and to manipulate growth of hybrid nanoparticles on this template supported on a Si substrate by using electrodeposition and organic functionalization.
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Affiliation(s)
- Jung-Soo Kang
- WATLab and Department of Chemistry, University of Waterloo , Waterloo, Ontario N2L 3G1, Canada
| | - Youngku Sohn
- WATLab and Department of Chemistry, University of Waterloo , Waterloo, Ontario N2L 3G1, Canada
| | - Debabrata Pradhan
- WATLab and Department of Chemistry, University of Waterloo , Waterloo, Ontario N2L 3G1, Canada
| | - Kam Tong Leung
- WATLab and Department of Chemistry, University of Waterloo , Waterloo, Ontario N2L 3G1, Canada
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Hong W, Cai Q, Ban R, He X, Jian C, Li J, Li J, Liu W. High-Performance Silicon Photoanode Enhanced by Gold Nanoparticles for Efficient Water Oxidation. ACS APPLIED MATERIALS & INTERFACES 2018; 10:6262-6268. [PMID: 29384361 DOI: 10.1021/acsami.7b16749] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Ni catalyst is a low-cost catalyst for oxygen evolution reaction (OER) on silicon metal-insulator-semiconductor photoanode. We found that Au nanoparticles incorporated with Ni nanoparticles can enhance the OER activity and stability of Ni nanoparticles due to the local surface plasmon resonance (LSPR) effect of the Au nanoparticles. The efficiency of NiAu/TiO2/n-Si photoanode can be boosted at least three times under the illumination (100 mW/cm2) by LSPR effect of the Au nanoparticles. A small onset potential of 1.03 V versus reversible hydrogen electrode (overpotential, η0 = -0.20 V) and a current density of 18.80 mA/cm2 at 1.23 V versus reversible hydrogen electrode can be obtained. The NiAu/TiO2/n-Si photoanode exhibits a high saturation current density of 35 mA/cm2, which is greater than that of most of the state-of-the-art silicon photoanodes.
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Affiliation(s)
- Wenting Hong
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Qian Cai
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, China
| | - Rongcheng Ban
- Department of Physics/Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University , Xiamen, Fujian 361005, China
| | - Xu He
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, China
| | - Chuanyong Jian
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, China
| | - Jing Li
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, China
| | - Jing Li
- Department of Physics/Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University , Xiamen, Fujian 361005, China
| | - Wei Liu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, China
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Huang H, Tan M, Wang X, Zhang M, Guo S, Zou X, Lu X. Synthesis of Mesoporous γ-Alumina-Supported Co-Based Catalysts and Their Catalytic Performance for Chemoselective Reduction of Nitroarenes. ACS APPLIED MATERIALS & INTERFACES 2018; 10:5413-5428. [PMID: 29368913 DOI: 10.1021/acsami.7b14513] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Mesoporous γ-alumina (γ-MA)-supported cobalt oxides (Co3O4) with large surface areas and narrow pore size distributions were first prepared through one-pot hydrolysis of metal nitrates. The obtained Co3O4/γ-MA materials were impregnated with a water-ethanol solution of 1,10-phenanthroline, followed by treatment at 700 °C in N2 atmosphere, generating Co-NC/γ-MA catalysts containing N-doped graphitic carbon (NC). The Co-NC/γ-MA catalysts maintained the mesoporous structure of γ-MA, and Co3O4 was reduced to metallic Co nanoparticles highly dispersed in the γ-MA frameworks. Metallic Co species had a strong interaction with NC in the matrices, avoiding the surface oxidation of Co particles. The Co-NC/γ-MA catalysts exhibited superior catalytic activity and quantitatively reduced a variety of functionalized nitroarenes to the corresponding arylamines with hydrazine hydrate in ethanol at near room temperature, affording yields of >99%. The recycling test of 2-chloronitrobenzene as a model reaction showed no detectable change in catalyst performance after 10 cycle reactions.
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Affiliation(s)
- Haigen Huang
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University , Shanghai 200072, China
| | - Mingwu Tan
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
| | - Xueguang Wang
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University , Shanghai 200072, China
| | - Man Zhang
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University , Shanghai 200072, China
| | - Shuoqiang Guo
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University , Shanghai 200072, China
| | - Xiujing Zou
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University , Shanghai 200072, China
| | - Xionggang Lu
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University , Shanghai 200072, China
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Wang LC, Zhong Y, Widmann D, Weissmüller J, Behm RJ. Oxygen Adsorption and Low-Temperature CO Oxidation on a Nanoporous Au Catalyst: Reaction Mechanism and Foreign Metal Effects. Top Catal 2018. [DOI: 10.1007/s11244-017-0881-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Čempel D, Nguyen MT, Ishida Y, Tokunaga T, Yonezawa T. Ligand free green plasma-in-liquid synthesis of Au/Ag alloy nanoparticles. NEW J CHEM 2018. [DOI: 10.1039/c7nj05154a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Au/Ag alloy nanoparticles were successfully prepared by a microwave-induced plasma in liquid process without any organic protecting or reducing agents.
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Affiliation(s)
- David Čempel
- Division of Materials Science and Engineering
- Faculty of Engineering
- Hokkaido University
- Hokkaido 060-8628
- Japan
| | - Mai Thanh Nguyen
- Division of Materials Science and Engineering
- Faculty of Engineering
- Hokkaido University
- Hokkaido 060-8628
- Japan
| | - Yohei Ishida
- Division of Materials Science and Engineering
- Faculty of Engineering
- Hokkaido University
- Hokkaido 060-8628
- Japan
| | - Tomoharu Tokunaga
- Department of Materials Science and Engineering
- Faculty of Engineering
- Nagoya University
- Furo-cho
- Chikusa
| | - Tetsu Yonezawa
- Division of Materials Science and Engineering
- Faculty of Engineering
- Hokkaido University
- Hokkaido 060-8628
- Japan
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