1
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Paunović V, Hemberger P, Bodi A, Hauert R, van Bokhoven JA. Impact of Nonzeolite-Catalyzed Formation of Formaldehyde on the Methanol-to-Hydrocarbons Conversion. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vladimir Paunović
- Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Patrick Hemberger
- Laboratory for Synchrotron Radiation and Femtochemistry, Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Andras Bodi
- Laboratory for Synchrotron Radiation and Femtochemistry, Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Roland Hauert
- Swiss Federal Laboratories for Materials Science and Technology, EMPA, Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Jeroen A. van Bokhoven
- Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
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2
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Paunović V, Sushkevich V, Rzepka P, Artiglia L, Hauert R, Sik Lee S, van Bokhoven JA. Reactivation of catalysts for methanol–to–hydrocarbons conversion with hydrogen. J Catal 2022. [DOI: 10.1016/j.jcat.2022.01.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Faust Akl D, Ruiz‐Ferrando A, Fako E, Hauert R, Safonova O, Mitchell S, López N, Pérez‐Ramírez J. Cover Feature: Precursor Nuclearity and Ligand Effects in Atomically‐Dispersed Heterogeneous Iron Catalysts for Alkyne Semi‐Hydrogenation (ChemCatChem 14/2021). ChemCatChem 2021. [DOI: 10.1002/cctc.202100888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Dario Faust Akl
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Andrea Ruiz‐Ferrando
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Edvin Fako
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Roland Hauert
- Empa-Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 8600 Dübendorf Switzerland
| | - Olga Safonova
- Paul Scherrer Institute Forschungsstrasse 111 5232 Villigen Switzerland
| | - Sharon Mitchell
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Núria López
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Javier Pérez‐Ramírez
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
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4
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Faust Akl D, Ruiz‐Ferrando A, Fako E, Hauert R, Safonova O, Mitchell S, López N, Pérez‐Ramírez J. Precursor Nuclearity and Ligand Effects in Atomically‐Dispersed Heterogeneous Iron Catalysts for Alkyne Semi‐Hydrogenation. ChemCatChem 2021. [DOI: 10.1002/cctc.202100235] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Dario Faust Akl
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Andrea Ruiz‐Ferrando
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Edvin Fako
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Roland Hauert
- Empa-Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 8600 Dübendorf Switzerland
| | - Olga Safonova
- Paul Scherrer Institute Forschungsstrasse 111 5232 Villigen Switzerland
| | - Sharon Mitchell
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Núria López
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Javier Pérez‐Ramírez
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
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5
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Sánta B, Balogh Z, Pósa L, Krisztián D, Török TN, Molnár D, Sinkó C, Hauert R, Csontos M, Halbritter A. Noise Tailoring in Memristive Filaments. ACS Appl Mater Interfaces 2021; 13:7453-7460. [PMID: 33533590 PMCID: PMC7899176 DOI: 10.1021/acsami.0c21156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 01/25/2021] [Indexed: 06/12/2023]
Abstract
In this study, the possibilities of noise tailoring in filamentary resistive switching memory devices are investigated. To this end, the resistance and frequency scaling of the low-frequency 1/f-type noise properties are studied in representative mainstream material systems. It is shown that the overall noise floor is tailorable by the proper material choice, as demonstrated by the order-of-magnitude smaller noise levels in Ta2O5 and Nb2O5 transition-metal oxide memristors compared to Ag-based devices. Furthermore, the variation of the resistance states allows orders-of-magnitude tuning of the relative noise level in all of these material systems. This behavior is analyzed in the framework of a point-contact noise model highlighting the possibility for the disorder-induced suppression of the noise contribution arising from remote fluctuators. These findings promote the design of multipurpose resistive switching units, which can simultaneously serve as analog-tunable memory elements and tunable noise sources in probabilistic computing machines.
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Affiliation(s)
- Botond Sánta
- Department of Physics, Budapest
University of Technology and Economics, Budafoki út 8, 1111
Budapest, Hungary
- MTA-BME Condensed Matter Research
Group, Budafoki út 8, 1111 Budapest,
Hungary
| | - Zoltán Balogh
- Department of Physics, Budapest
University of Technology and Economics, Budafoki út 8, 1111
Budapest, Hungary
- MTA-BME Condensed Matter Research
Group, Budafoki út 8, 1111 Budapest,
Hungary
| | - László Pósa
- Department of Physics, Budapest
University of Technology and Economics, Budafoki út 8, 1111
Budapest, Hungary
- Institute of Technical Physics and
Materials Science, Centre for Energy Research, Konkoly-Thege M. út
29-33, 1121 Budapest, Hungary
| | - Dávid Krisztián
- Department of Physics, Budapest
University of Technology and Economics, Budafoki út 8, 1111
Budapest, Hungary
| | - Tímea Nóra Török
- Department of Physics, Budapest
University of Technology and Economics, Budafoki út 8, 1111
Budapest, Hungary
- MTA-BME Condensed Matter Research
Group, Budafoki út 8, 1111 Budapest,
Hungary
| | - Dániel Molnár
- Department of Physics, Budapest
University of Technology and Economics, Budafoki út 8, 1111
Budapest, Hungary
- MTA-BME Condensed Matter Research
Group, Budafoki út 8, 1111 Budapest,
Hungary
| | - Csaba Sinkó
- Department of Physics, Budapest
University of Technology and Economics, Budafoki út 8, 1111
Budapest, Hungary
| | - Roland Hauert
- Laboratory for Joining Technologies & Corrosion,
Empa, Swiss Federal Laboratories for Materials Science and
Technology, Überlandstrasse 129, CH-8600 Dübendorf,
Switzerland
| | - Miklós Csontos
- Department of Physics, Budapest
University of Technology and Economics, Budafoki út 8, 1111
Budapest, Hungary
- Transport at Nanoscale Interfaces Laboratory,
Empa, Swiss Federal Laboratories for Materials Science and
Technology, Überlandstrasse 129, CH-8600 Dübendorf,
Switzerland
| | - András Halbritter
- Department of Physics, Budapest
University of Technology and Economics, Budafoki út 8, 1111
Budapest, Hungary
- MTA-BME Condensed Matter Research
Group, Budafoki út 8, 1111 Budapest,
Hungary
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6
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Vorobyeva E, Gerken VC, Mitchell S, Sabadell-Rendón A, Hauert R, Xi S, Borgna A, Klose D, Collins SM, Midgley PA, Kepaptsoglou DM, Ramasse QM, Ruiz-Ferrando A, Fako E, Ortuño MA, López N, Carreira EM, Pérez-Ramírez J. Activation of Copper Species on Carbon Nitride for Enhanced Activity in the Arylation of Amines. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03164] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Evgeniya Vorobyeva
- Department of Chemistry and Applied Biosciences, ETH Zürich,, Vladimir-Prelog-Weg 1-5, Zürich 8093, Switzerland
| | - Viktoria C. Gerken
- Department of Chemistry and Applied Biosciences, ETH Zürich,, Vladimir-Prelog-Weg 1-5, Zürich 8093, Switzerland
| | - Sharon Mitchell
- Department of Chemistry and Applied Biosciences, ETH Zürich,, Vladimir-Prelog-Weg 1-5, Zürich 8093, Switzerland
| | - Albert Sabadell-Rendón
- Institute of Chemical Research of Catalonia and The Barcelona Institute of Science and Technology, Tarragona 43007, Spain
| | - Roland Hauert
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf 8600, Switzerland
| | - Shibo Xi
- Institute of Chemical and Engineering Sciences, A*STAR, 1 Pesek Road, Jurong Island, Singapore 627833
| | - Armando Borgna
- Institute of Chemical and Engineering Sciences, A*STAR, 1 Pesek Road, Jurong Island, Singapore 627833
| | - Daniel Klose
- Department of Chemistry and Applied Biosciences, ETH Zürich,, Vladimir-Prelog-Weg 1-5, Zürich 8093, Switzerland
| | - Sean M. Collins
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS, U.K
- School of Chemical and Process Engineering and School of Physics, University of Leeds, Leeds LS2 9JT, U.K
| | - Paul A. Midgley
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS, U.K
| | - Demie M. Kepaptsoglou
- SuperSTEM Laboratory, SciTech Daresbury Campus, Daresbury WA4 4AD, U.K
- Department of Physics, University of York, York YO10 5DD, U.K
| | - Quentin M. Ramasse
- SuperSTEM Laboratory, SciTech Daresbury Campus, Daresbury WA4 4AD, U.K
- School of Chemical and Process Engineering and School of Physics, University of Leeds, Leeds LS2 9JT, U.K
| | - Andrea Ruiz-Ferrando
- Institute of Chemical Research of Catalonia and The Barcelona Institute of Science and Technology, Tarragona 43007, Spain
| | - Edvin Fako
- Institute of Chemical Research of Catalonia and The Barcelona Institute of Science and Technology, Tarragona 43007, Spain
| | - Manuel A. Ortuño
- Institute of Chemical Research of Catalonia and The Barcelona Institute of Science and Technology, Tarragona 43007, Spain
| | - Núria López
- Institute of Chemical Research of Catalonia and The Barcelona Institute of Science and Technology, Tarragona 43007, Spain
| | - Erick M. Carreira
- Department of Chemistry and Applied Biosciences, ETH Zürich,, Vladimir-Prelog-Weg 1-5, Zürich 8093, Switzerland
| | - Javier Pérez-Ramírez
- Department of Chemistry and Applied Biosciences, ETH Zürich,, Vladimir-Prelog-Weg 1-5, Zürich 8093, Switzerland
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7
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Büchele S, Chen Z, Fako E, Krumeich F, Hauert R, Safonova OV, López N, Mitchell S, Pérez‐Ramírez J. Carrier‐Induced Modification of Palladium Nanoparticles on Porous Boron Nitride for Alkyne Semi‐Hydrogenation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005842] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Simon Büchele
- Institute for Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zürich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
| | - Zupeng Chen
- Institute for Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zürich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
| | - Edvin Fako
- Institute of Chemical Research of Catalonia and The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Frank Krumeich
- Laboratory of Inorganic Chemistry Department of Chemistry and Applied Biosciences ETH Zürich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
| | - Roland Hauert
- Empa— Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 8600 Dübendorf Switzerland
| | - Olga V. Safonova
- Paul Scherrer Institute Forschungsstrasse 111 5232 Villigen Switzerland
| | - Núria López
- Institute of Chemical Research of Catalonia and The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Sharon Mitchell
- Institute for Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zürich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
| | - Javier Pérez‐Ramírez
- Institute for Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zürich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
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8
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Büchele S, Chen Z, Fako E, Krumeich F, Hauert R, Safonova OV, López N, Mitchell S, Pérez-Ramírez J. Carrier-Induced Modification of Palladium Nanoparticles on Porous Boron Nitride for Alkyne Semi-Hydrogenation. Angew Chem Int Ed Engl 2020; 59:19639-19644. [PMID: 32628798 DOI: 10.1002/anie.202005842] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Indexed: 11/06/2022]
Abstract
Chemical modifiers enhance the efficiency of metal catalysts in numerous applications, but their introduction often involves toxic or expensive precursors and complicates the synthesis. Here, we show that a porous boron nitride carrier can directly modify supported palladium nanoparticles, originating unparalleled performance in the continuous semi-hydrogenation of alkynes. Analysis of the impact of various structural parameters reveals that using a defective high surface area boron nitride and ensuring a palladium particle size of 4-5 nm is critical for maximizing the specific rate. The combined experimental and theoretical analyses point towards boron incorporation from defects in the support to the palladium subsurface, creating the desired isolated ensembles determining the selectivity. This practical approach highlights the unexplored potential of using tailored carriers for catalyst design.
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Affiliation(s)
- Simon Büchele
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093, Zürich, Switzerland
| | - Zupeng Chen
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093, Zürich, Switzerland
| | - Edvin Fako
- Institute of Chemical Research of Catalonia and, The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Frank Krumeich
- Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093, Zürich, Switzerland
| | - Roland Hauert
- Empa-, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600, Dübendorf, Switzerland
| | - Olga V Safonova
- Paul Scherrer Institute, Forschungsstrasse 111, 5232, Villigen, Switzerland
| | - Núria López
- Institute of Chemical Research of Catalonia and, The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Sharon Mitchell
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093, Zürich, Switzerland
| | - Javier Pérez-Ramírez
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093, Zürich, Switzerland
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9
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Scharfe M, Paunović V, Mitchell S, Hauert R, Xi S, Borgna A, Pérez-Ramírez J. Dual catalyst system for selective vinyl chloride production via ethene oxychlorination. Catal Sci Technol 2020. [DOI: 10.1039/c9cy01801h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A dual system featuring ZrO2-supported CeO2 and Ca-doped Al2O3 catalysts enables the direct production of vinyl chloride via ethene oxychlorination.
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Affiliation(s)
- Matthias Scharfe
- Institute for Chemical and Bioengineering
- Department of Chemistry and Applied Biosciences
- ETH Zurich
- 8093 Zurich
- Switzerland
| | - Vladimir Paunović
- Institute for Chemical and Bioengineering
- Department of Chemistry and Applied Biosciences
- ETH Zurich
- 8093 Zurich
- Switzerland
| | - Sharon Mitchell
- Institute for Chemical and Bioengineering
- Department of Chemistry and Applied Biosciences
- ETH Zurich
- 8093 Zurich
- Switzerland
| | - Roland Hauert
- EMPA
- Swiss Federal Laboratories for Materials Science and Technology
- 8600 Dübendorf
- Switzerland
| | - Shibo Xi
- Institute of Chemical and Engineering Sciences
- Agency for Science, Technology and Research in Singapore
- Jurong Island
- 627833 Singapore
| | - Armando Borgna
- Institute of Chemical and Engineering Sciences
- Agency for Science, Technology and Research in Singapore
- Jurong Island
- 627833 Singapore
| | - Javier Pérez-Ramírez
- Institute for Chemical and Bioengineering
- Department of Chemistry and Applied Biosciences
- ETH Zurich
- 8093 Zurich
- Switzerland
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10
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Frei MS, Mondelli C, Cesarini A, Krumeich F, Hauert R, Stewart JA, Curulla Ferré D, Pérez-Ramírez J. Role of Zirconia in Indium Oxide-Catalyzed CO2 Hydrogenation to Methanol. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03305] [Citation(s) in RCA: 100] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Matthias S. Frei
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Cecilia Mondelli
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Alessia Cesarini
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Frank Krumeich
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Roland Hauert
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Joseph A. Stewart
- Total Research & Technology Feluy, Zone Industrielle Feluy C, 7181 Seneffe, Belgium
| | - Daniel Curulla Ferré
- Total Research & Technology Feluy, Zone Industrielle Feluy C, 7181 Seneffe, Belgium
| | - Javier Pérez-Ramírez
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
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11
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Affiliation(s)
- Simon Büchele
- Department of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
| | - Zupeng Chen
- Department of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
| | - Sharon Mitchell
- Department of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
| | - Roland Hauert
- EmpaSwiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 8600 Dübendorf Switzerland
| | - Frank Krumeich
- Department of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
| | - Javier Pérez‐Ramírez
- Department of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
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12
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Vorobyeva E, Fako E, Chen Z, Collins SM, Johnstone D, Midgley PA, Hauert R, Safonova OV, Vilé G, López N, Mitchell S, Pérez-Ramírez J. Atom-by-Atom Resolution of Structure-Function Relations over Low-Nuclearity Metal Catalysts. Angew Chem Int Ed Engl 2019; 58:8724-8729. [PMID: 31050138 DOI: 10.1002/anie.201902136] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Indexed: 01/22/2023]
Abstract
Controlling the structure sensitivity of catalyzed reactions over metals is central to developing atom-efficient chemical processes. Approaching the minimum ensemble size, the properties enter a non-scalable regime in which each atom counts. Almost all trends in this ultra-small frontier derive from surface science approaches using model systems, because of both synthetic and analytical challenges. Exploiting the unique coordination chemistry of carbon nitride, we discriminate through experiments and simulations the interplay between the geometry, electronic structure, and reactivity of palladium atoms, dimers, and trimers. Catalytic tests evidence application-dependent requirements of the active ensemble. In the semi-hydrogenation of alkynes, the nuclearity primarily impacts activity, whereas the selectivity and stability are affected in Suzuki coupling. This powerful approach will provide practical insights into the design of heterogeneous catalysts comprising well-defined numbers of atoms.
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Affiliation(s)
- Evgeniya Vorobyeva
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093, Zürich, Switzerland
| | - Edvin Fako
- Institute of Chemical Research of Catalonia and Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Zupeng Chen
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093, Zürich, Switzerland
| | - Sean M Collins
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK
| | - Duncan Johnstone
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK
| | - Paul A Midgley
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK
| | - Roland Hauert
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600, Dübendorf, Switzerland
| | | | - Gianvito Vilé
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093, Zürich, Switzerland
| | - Núria López
- Institute of Chemical Research of Catalonia and Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Sharon Mitchell
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093, Zürich, Switzerland
| | - Javier Pérez-Ramírez
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093, Zürich, Switzerland
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13
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Vorobyeva E, Fako E, Chen Z, Collins SM, Johnstone D, Midgley PA, Hauert R, Safonova OV, Vilé G, López N, Mitchell S, Pérez‐Ramírez J. Atom‐by‐Atom Resolution of Structure–Function Relations over Low‐Nuclearity Metal Catalysts. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902136] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Evgeniya Vorobyeva
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
| | - Edvin Fako
- Institute of Chemical Research of Catalonia and Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Zupeng Chen
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
| | - Sean M. Collins
- Department of Materials Science and MetallurgyUniversity of Cambridge Cambridge CB3 0FS UK
| | - Duncan Johnstone
- Department of Materials Science and MetallurgyUniversity of Cambridge Cambridge CB3 0FS UK
| | - Paul A. Midgley
- Department of Materials Science and MetallurgyUniversity of Cambridge Cambridge CB3 0FS UK
| | - Roland Hauert
- EmpaSwiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 8600 Dübendorf Switzerland
| | | | - Gianvito Vilé
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
| | - Núria López
- Institute of Chemical Research of Catalonia and Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Sharon Mitchell
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
| | - Javier Pérez‐Ramírez
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
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14
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Pardo A, Ilic E, Thorwarth K, Stiefel M, Hauert R. Corrosion fatigue in DLC-coated articulating implants: an accelerated methodology to predict realistic interface lifetime. Sci Technol Adv Mater 2019; 20:173-186. [PMID: 30891104 PMCID: PMC6419647 DOI: 10.1080/14686996.2019.1580483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 01/25/2019] [Accepted: 01/25/2019] [Indexed: 06/09/2023]
Abstract
We present a methodology to accelerate and estimate the lifetime of an interlayer under dynamic loading in body-like media. It is based on accelerating corrosion fatigue processes taking place at the buried interface of a Si-based adhesion-promoting interlayer in articulating implants on a CoCrMo biomedical alloy; the implants are coated with diamond-like carbon (DLC). The number of interface loading cycles to delamination is determined by reciprocal loading in corrosive fluid. Its dependence on the load is summarized in a Wöhler-like curve of a DLC/DLC-Si/CoCrMo system in body working conditions: cyclic stresses at 37 °C in phosphate buffered saline (PBS). The presence of oxygen as a contaminant strongly affects the lifetime of the interface under corrosion fatigue. The main parameters acting on the prediction, with a special emphasis on simulated in vivo conditions, are analyzed and discussed: the media (PBS, Milli-Q water, NaCl, Ringers' solution and bovine calf serum), the load, the frequency and the composition of the interface determined by X-ray photoelectron spectroscopy.
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Affiliation(s)
- Ainhoa Pardo
- Laboratory for Joining Technologies and Corrosion, Empa, Swiss Federal Laboratories for Materials Science and Technology, CH-Dübendorf, Switzerland
| | - Emilija Ilic
- Laboratory for Joining Technologies and Corrosion, Empa, Swiss Federal Laboratories for Materials Science and Technology, CH-Dübendorf, Switzerland
| | - Kerstin Thorwarth
- Laboratory for Nanoscaled Materials Science, Empa, Swiss Federal Laboratories for Materials Science and Technology, CH-Dübendorf, Switzerland
| | - Michael Stiefel
- Laboratory for Transport at Nanoscale Interfaces, Empa, Swiss Federal Laboratories for Materials Science and Technology, CH-Dübendorf, Switzerland
| | - Roland Hauert
- Laboratory for Joining Technologies and Corrosion, Empa, Swiss Federal Laboratories for Materials Science and Technology, CH-Dübendorf, Switzerland
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15
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Kaiser SK, Lin R, Mitchell S, Fako E, Krumeich F, Hauert R, Safonova OV, Kondratenko VA, Kondratenko EV, Collins SM, Midgley PA, López N, Pérez-Ramírez J. Controlling the speciation and reactivity of carbon-supported gold nanostructures for catalysed acetylene hydrochlorination. Chem Sci 2018; 10:359-369. [PMID: 30746085 PMCID: PMC6334749 DOI: 10.1039/c8sc03186j] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 11/22/2018] [Indexed: 11/24/2022] Open
Abstract
Distinct gold nanostructures on activated and nitrogen-doped carbons are evaluated in acetylene hydrochlorination.
Carbon-supported gold catalysts have the potential to replace the toxic mercuric chloride-based system applied industrially for acetylene hydrochlorination, a key technology for the manufacture of polyvinyl chloride. However, the design of an optimal catalyst is essentially hindered by the difficulties in assessing the nature of the active site. Herein, we present a platform of carbon supported gold nanostructures at a fixed metal loading, ranging from single atoms of tunable oxidation state and coordination to metallic nanoparticles, by varying the structure of functionalised carbons and use of thermal activation. While on activated carbon particle aggregation occurs progressively above 473 K, on nitrogen-doped carbon gold single atoms exhibit outstanding stability up to temperatures of 1073 K and under reaction conditions. By combining steady-state experiments, density functional theory, and transient mechanistic studies, we assess the relation between the metal speciation, electronic properties, and catalytic activity. The results indicate that the activity of gold-based catalysts correlates with the population of Au(i)Cl single atoms and the reaction follows a Langmuir–Hinshelwood mechanism. Strong interaction with HCl and thermodynamically favoured acetylene activation were identified as the key features of the Au(i)Cl sites that endow their superior catalytic performance in comparison to N-stabilised Au(iii) counterparts and gold nanoparticles. Finally, we show that the carrier (activated carbon versus nitrogen-doped carbon) does not affect the catalytic response, but determines the deactivation mechanism (gold particle aggregation and pore blockage, respectively), which opens up different options for the development of stable, high-performance hydrochlorination catalysts.
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Affiliation(s)
- Selina K Kaiser
- Institute for Chemical and Bioengineering , Department of Chemistry and Applied Biosciences , ETH Zurich , Vladimir-Prelog-Weg 1 , 8093 Zurich , Switzerland .
| | - Ronghe Lin
- Institute for Chemical and Bioengineering , Department of Chemistry and Applied Biosciences , ETH Zurich , Vladimir-Prelog-Weg 1 , 8093 Zurich , Switzerland .
| | - Sharon Mitchell
- Institute for Chemical and Bioengineering , Department of Chemistry and Applied Biosciences , ETH Zurich , Vladimir-Prelog-Weg 1 , 8093 Zurich , Switzerland .
| | - Edvin Fako
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain
| | - Frank Krumeich
- Institute for Chemical and Bioengineering , Department of Chemistry and Applied Biosciences , ETH Zurich , Vladimir-Prelog-Weg 1 , 8093 Zurich , Switzerland .
| | - Roland Hauert
- Swiss Federal Laboratories for Materials Science and Technology , EMPA , Überlandstrasse 129 , 8600 Dübendorf , Switzerland
| | | | - Vita A Kondratenko
- Leibniz-Institut für Katalyse e. V. , Albert-Einstein-Straße 29a , 18059 Rostock , Germany
| | - Evgenii V Kondratenko
- Leibniz-Institut für Katalyse e. V. , Albert-Einstein-Straße 29a , 18059 Rostock , Germany
| | - Sean M Collins
- Department of Materials Science and Metallurgy , University of Cambridge , 27 Charles Babbage Road , Cambridge CB3 0FS , UK
| | - Paul A Midgley
- Department of Materials Science and Metallurgy , University of Cambridge , 27 Charles Babbage Road , Cambridge CB3 0FS , UK
| | - Núria López
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain
| | - Javier Pérez-Ramírez
- Institute for Chemical and Bioengineering , Department of Chemistry and Applied Biosciences , ETH Zurich , Vladimir-Prelog-Weg 1 , 8093 Zurich , Switzerland .
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16
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Molnár D, Török TN, Sánta B, Gubicza A, Magyarkuti A, Hauert R, Kiss G, Halbritter A, Csontos M. In situ impedance matching in Nb/Nb 2O 5/PtIr memristive nanojunctions for ultra-fast neuromorphic operation. Nanoscale 2018; 10:19290-19296. [PMID: 30325385 DOI: 10.1039/c8nr06226a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The dynamical aspects of bipolar resistive switchings have been investigated in Nb/Nb2O5/PtIr nanojunctions. We found that the widely tuneable ON and OFF state resistances are well separated at low bias. On the other hand, the high-bias regime of the resistive switchings coincides with the onset of a high nonlinearity in the current-voltage characteristics, where the impedance of both states rapidly decreases and becomes equivalent around 50 Ω. This phenomenon enables the overriding of the RC limitations of fast switchings between higher resistance ON and OFF states. Consequently, nanosecond switching times between multiple resistance states due to subnanosecond voltage pulses are demonstrated. Moreover, this finding provides the possibility of impedance engineering by the appropriate choice of voltage signals, which facilitates that both the set and reset transitions take place in an impedance matched manner to the surrounding circuit, demonstrating the merits of ultra-fast operation of Nb2O5 based neuromorphic networks.
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Affiliation(s)
- Dániel Molnár
- Department of Physics, Budapest University of Technology and Economics, Budafoki ut 8, 1111 Budapest, Hungary and MTA-BME Condensed Matter Research Group, Budafoki ut 8, 1111 Budapest, Hungary
| | - Tímea Nóra Török
- Department of Physics, Budapest University of Technology and Economics, Budafoki ut 8, 1111 Budapest, Hungary and MTA-BME Condensed Matter Research Group, Budafoki ut 8, 1111 Budapest, Hungary
| | - Botond Sánta
- Department of Physics, Budapest University of Technology and Economics, Budafoki ut 8, 1111 Budapest, Hungary and MTA-BME Condensed Matter Research Group, Budafoki ut 8, 1111 Budapest, Hungary
| | - Agnes Gubicza
- Department of Physics, Budapest University of Technology and Economics, Budafoki ut 8, 1111 Budapest, Hungary and Empa, Swiss Federal Laboratories for Materials Science and Technology, Transport at Nanoscale Interfaces Laboratory, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland.
| | - András Magyarkuti
- Department of Physics, Budapest University of Technology and Economics, Budafoki ut 8, 1111 Budapest, Hungary and MTA-BME Condensed Matter Research Group, Budafoki ut 8, 1111 Budapest, Hungary
| | - Roland Hauert
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Joining Technologies & Corrosion, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Gábor Kiss
- Department of Atomic Physics, Budapest University of Technology and Economics, Budafoki ut 8, 1111 Budapest, Hungary
| | - András Halbritter
- Department of Physics, Budapest University of Technology and Economics, Budafoki ut 8, 1111 Budapest, Hungary and MTA-BME Condensed Matter Research Group, Budafoki ut 8, 1111 Budapest, Hungary
| | - Miklós Csontos
- Department of Physics, Budapest University of Technology and Economics, Budafoki ut 8, 1111 Budapest, Hungary and Empa, Swiss Federal Laboratories for Materials Science and Technology, Transport at Nanoscale Interfaces Laboratory, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland.
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17
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Albani D, Shahrokhi M, Chen Z, Mitchell S, Hauert R, López N, Pérez-Ramírez J. Selective ensembles in supported palladium sulfide nanoparticles for alkyne semi-hydrogenation. Nat Commun 2018; 9:2634. [PMID: 29980682 PMCID: PMC6035185 DOI: 10.1038/s41467-018-05052-4] [Citation(s) in RCA: 126] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 06/07/2018] [Indexed: 11/08/2022] Open
Abstract
Ensemble control has been intensively pursued for decades to identify sustainable alternatives to the Lindlar catalyst (PdPb/CaCO3) applied for the partial hydrogenation of alkynes in industrial organic synthesis. Although the geometric and electronic requirements are known, a literature survey illustrates the difficulty of transferring this knowledge into an efficient and robust catalyst. Here, we report a simple treatment of palladium nanoparticles supported on graphitic carbon nitride with aqueous sodium sulfide, which directs the formation of a nanostructured Pd3S phase with controlled crystallographic orientation, exhibiting unparalleled performance in the semi-hydrogenation of alkynes in the liquid phase. The exceptional behavior is linked to the multifunctional role of sulfur. Apart from defining a structure integrating spatially-isolated palladium trimers, the active ensembles, the modifier imparts a bifunctional mechanism and weak binding of the organic intermediates. Similar metal trimers are also identified in Pd4S, evidencing the pervasiveness of these selective ensembles in supported palladium sulfides.
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Affiliation(s)
- Davide Albani
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093, Zürich, Switzerland
| | - Masoud Shahrokhi
- Institute of Chemical Research of Catalonia (ICIQ), and The Barcelona Institute of Technology Av., Països Catalans 16, 43007, Tarragona, Spain
| | - Zupeng Chen
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093, Zürich, Switzerland
| | - Sharon Mitchell
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093, Zürich, Switzerland
| | - Roland Hauert
- EMPA, Swiss Federal Laboratories for Materials Science and Technology, Uberlandstrasse129, 8600, Dübendorf, Switzerland
| | - Núria López
- Institute of Chemical Research of Catalonia (ICIQ), and The Barcelona Institute of Technology Av., Països Catalans 16, 43007, Tarragona, Spain.
| | - Javier Pérez-Ramírez
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093, Zürich, Switzerland.
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18
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Paunović V, Artusi M, Verel R, Krumeich F, Hauert R, Pérez-Ramírez J. Lanthanum vanadate catalysts for selective and stable methane oxybromination. J Catal 2018. [DOI: 10.1016/j.jcat.2018.04.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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19
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Chen Z, Vorobyeva E, Mitchell S, Fako E, López N, Collins SM, Leary RK, Midgley PA, Hauert R, Pérez-Ramírez J. Single-atom heterogeneous catalysts based on distinct carbon nitride scaffolds. Natl Sci Rev 2018. [DOI: 10.1093/nsr/nwy048] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Carbon nitrides integrating macroheterocycles offer unique potential as hosts for stabilizing metal atoms due to their rich electronic structure. To date, only graphitic heptazine-based polymers have been studied. Here, we demonstrate that palladium atoms can be effectively isolated on other carbon nitride scaffolds including linear melem oligomers and poly(triazine/heptazine imides). Increased metal uptake was linked to the larger cavity size and the presence of chloride ions in the polyimide structures. Changing the host structure leads to significant variation in the average oxidation state of the metal, which can be tuned by exchange of the ionic species as evidenced by X-ray photoelectron spectroscopy and supported by density functional theory. Evaluation in the semi-hydrogenation of 2-methyl-3-butyn-2-ol reveals an inverse correlation between the activity and the degree of oxidation of palladium, with oligomers exhibiting the highest activity. These findings provide new mechanistic insights into the influence of the carbon nitride structure on metal stabilization.
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Affiliation(s)
- Zupeng Chen
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Evgeniya Vorobyeva
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Sharon Mitchell
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Edvin Fako
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, 43007 Tarragona, Spain
| | - Núria López
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, 43007 Tarragona, Spain
| | - Sean M Collins
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK
| | - Rowan K Leary
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK
| | - Paul A Midgley
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK
| | - Roland Hauert
- Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Javier Pérez-Ramírez
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
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20
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Affiliation(s)
- Ronghe Lin
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Selina K. Kaiser
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Roland Hauert
- Swiss Federal Laboratories for Materials Science and Technology, EMPA, Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Javier Pérez-Ramírez
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
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21
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Affiliation(s)
- Vladimir Paunović
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8093 Zurich, Switzerland
| | - Guido Zichittella
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8093 Zurich, Switzerland
| | - Sharon Mitchell
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8093 Zurich, Switzerland
| | - Roland Hauert
- Swiss
Federal Laboratories for Materials Science and Technology, EMPA, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Javier Pérez-Ramírez
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8093 Zurich, Switzerland
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22
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Martín AJ, Mitchell S, Scholder O, Verel R, Hauert R, Bernard L, Jensen C, Schwefer M, Pérez-Ramírez J. Elucidating the Distribution and Speciation of Boron and Cesium in BCsX Zeolite Catalysts for Styrene Production. Chemphyschem 2017; 19:437-445. [DOI: 10.1002/cphc.201701086] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 10/27/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Antonio J. Martín
- ETH Zürich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
| | - Sharon Mitchell
- ETH Zürich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
| | - Olivier Scholder
- Empa, Department of Materials meet Life, Laboratory for Nanoscale Material Science; Überlandstrasse 129 8600 Dübendorf Switzerland
| | - René Verel
- ETH Zürich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
| | - Roland Hauert
- Empa, Department of Advanced Materials and Surfaces, Laboratory for Joining Technologies & Corrosion; Überlandstrasse 129 8600 Dübendorf Switzerland
| | - Laetitia Bernard
- Empa, Department of Materials meet Life, Laboratory for Nanoscale Material Science; Überlandstrasse 129 8600 Dübendorf Switzerland
| | - Christopher Jensen
- thyssenkrupp Industrial Solutions AG; Friedrich-Uhde-Strasse 15 44141 Dortmund Germany
| | - Meinhard Schwefer
- thyssenkrupp Industrial Solutions AG; Friedrich-Uhde-Strasse 15 44141 Dortmund Germany
| | - Javier Pérez-Ramírez
- ETH Zürich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
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23
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Paunović V, Lin R, Scharfe M, Amrute AP, Mitchell S, Hauert R, Pérez‐Ramírez J. Europium Oxybromide Catalysts for Efficient Bromine Looping in Natural Gas Valorization. Angew Chem Int Ed Engl 2017; 56:9791-9795. [DOI: 10.1002/anie.201704406] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 05/26/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Vladimir Paunović
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Ronghe Lin
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Matthias Scharfe
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Amol P. Amrute
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Sharon Mitchell
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Roland Hauert
- EmpaSwiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 8600 Dübendorf Switzerland
| | - Javier Pérez‐Ramírez
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
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24
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Paunović V, Lin R, Scharfe M, Amrute AP, Mitchell S, Hauert R, Pérez‐Ramírez J. Europium Oxybromide Catalysts for Efficient Bromine Looping in Natural Gas Valorization. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704406] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Vladimir Paunović
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Ronghe Lin
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Matthias Scharfe
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Amol P. Amrute
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Sharon Mitchell
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Roland Hauert
- EmpaSwiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 8600 Dübendorf Switzerland
| | - Javier Pérez‐Ramírez
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
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25
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Larrazábal GO, Martín AJ, Krumeich F, Hauert R, Pérez-Ramírez J. Solvothermally-Prepared Cu 2 O Electrocatalysts for CO 2 Reduction with Tunable Selectivity by the Introduction of p-Block Elements. ChemSusChem 2017; 10:1255-1265. [PMID: 27911498 DOI: 10.1002/cssc.201601578] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Indexed: 06/06/2023]
Abstract
The electroreduction of CO2 to fuels and chemicals is an attractive strategy for the valorization of CO2 emissions. In this study, a Cu2 O electrocatalyst prepared by a simple and potentially scalable solvothermal route effectively targeted CO evolution at low-to-moderate overpotentials [with a current efficiency for CO (CECO ) of ca. 60 % after 12 h at -0.6 V vs. reversible hydrogen electrode, RHE], and its selectivity was tuned by the introduction of p-block elements (In, Sn, Ga, Al) into the catalyst. SEM, HRTEM, and voltammetric analyses revealed that the Cu2 O catalyst undergoes extensive surface restructuring (favorable for CO evolution) under the reaction conditions. The modification of Cu2 O with Sn and In further enhanced the current efficiency (CE) for CO (ca. 75 % after 12 h at -0.6 V). In contrast, the introduction of Al altered the selectivity profile of the catalyst significantly, decreasing the selectivity toward CO but promoting the reduction of CO2 to ethylene (CE≈7 %), n-propanol, and ethanol (CE≈2 % each) at -0.8 V vs. RHE. This result is related to a decreased reducibility of Al-doped Cu2 O that might preserve Cu+ species (favorable for C2 H4 production) under the reaction conditions, which is supported by XRD, X-ray photoelectron spectroscopy, and H2 temperature-programmed reduction observations.
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Affiliation(s)
- Gastón O Larrazábal
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
| | - Antonio J Martín
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
| | - Frank Krumeich
- Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
| | - Roland Hauert
- EMPA, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600, Dübendorf, Switzerland
| | - Javier Pérez-Ramírez
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
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26
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Keller T, Arras J, Haus M, Hauert R, Kenvin A, Kenvin J, Pérez-Ramírez J. Synthesis-property-performance relationships of amorphous silica-alumina catalysts for the production of methylenedianiline and higher homologues. J Catal 2016. [DOI: 10.1016/j.jcat.2016.08.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Larrazábal GO, Martín AJ, Mitchell S, Hauert R, Pérez-Ramírez J. Synergistic effects in silver–indium electrocatalysts for carbon dioxide reduction. J Catal 2016. [DOI: 10.1016/j.jcat.2015.12.014] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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28
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Larrazábal GO, Martín AJ, Mitchell S, Hauert R, Pérez-Ramírez J. Enhanced Reduction of CO2 to CO over Cu–In Electrocatalysts: Catalyst Evolution Is the Key. ACS Catal 2016. [DOI: 10.1021/acscatal.6b02067] [Citation(s) in RCA: 130] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gastón O. Larrazábal
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8093 Zurich, Switzerland
| | - Antonio J. Martín
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8093 Zurich, Switzerland
| | - Sharon Mitchell
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8093 Zurich, Switzerland
| | - Roland Hauert
- EMPA, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Javier Pérez-Ramírez
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8093 Zurich, Switzerland
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29
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Tao Y, Hauert R, Degen CL. Exclusively Gas-Phase Passivation of Native Oxide-Free Silicon(100) and Silicon(111) Surfaces. ACS Appl Mater Interfaces 2016; 8:13157-13165. [PMID: 27153212 DOI: 10.1021/acsami.6b03326] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Reactions in the gas phase are of primary technological importance for applications in nano- and microfabrication technology and in the semiconductor industry. We present exclusively gas-phase protocols to chemically passivate oxide-free Si(111) and Si(100) surfaces with short-chain alkynes. The resulting surfaces showed equal or better oxidation resistance than most existing liquid-phase-derived surfaces and rivaled the outstanding stability of a full-coverage Si(111)-propenyl surface.1,2 The most stable surface (Si(111)-ethenyl) grew one-fifth of a monolayer of oxide (0.04 nm) after 1 month of air exposure. We monitored the regrowth of oxides on passivated Si(111) and Si(100) surfaces by X-ray photoelectron spectroscopy (XPS) and observed a significant crystal-orientation dependence of initial rates when total oxide thickness was below approximately one monolayer (0.2 nm). This difference was correlated with the desorption kinetics of residual surface Si-F bonds formed during HF treatment. We discuss applications of the technology and suggest future directions for process optimization.
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Affiliation(s)
- Ye Tao
- Department of Physics, ETH Zürich , 8093 Zürich, Switzerland
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Roland Hauert
- Empa, Swiss Federal Laboratories of Materials Science and Technology , 8600 Dübendorf, Switzerland
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Martin O, Martín AJ, Mondelli C, Mitchell S, Segawa TF, Hauert R, Drouilly C, Curulla-Ferré D, Pérez-Ramírez J. Titelbild: Indium Oxide as a Superior Catalyst for Methanol Synthesis by CO 2
Hydrogenation (Angew. Chem. 21/2016). Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Oliver Martin
- ETH Zurich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Antonio J. Martín
- ETH Zurich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Cecilia Mondelli
- ETH Zurich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Sharon Mitchell
- ETH Zurich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Takuya F. Segawa
- ETH Zurich; Department of Chemistry and Applied Biosciences; Laboratory of Physical Chemistry; Vladimir-Prelog-Weg 2 8093 Zurich Switzerland
| | - Roland Hauert
- Empa; Swiss Federal Laboratories for Materials Science and Technology; Überlandstrasse 129 8600 Dübendorf Switzerland
| | - Charlotte Drouilly
- Total Research & Technology Feluy; Zone Industrielle Feluy C 7181 Seneffe Belgium
| | - Daniel Curulla-Ferré
- Total Research & Technology Feluy; Zone Industrielle Feluy C 7181 Seneffe Belgium
| | - Javier Pérez-Ramírez
- ETH Zurich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
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31
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Martin O, Martín AJ, Mondelli C, Mitchell S, Segawa TF, Hauert R, Drouilly C, Curulla-Ferré D, Pérez-Ramírez J. Cover Picture: Indium Oxide as a Superior Catalyst for Methanol Synthesis by CO2
Hydrogenation (Angew. Chem. Int. Ed. 21/2016). Angew Chem Int Ed Engl 2016. [DOI: 10.1002/anie.201603172] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Oliver Martin
- ETH Zurich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Antonio J. Martín
- ETH Zurich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Cecilia Mondelli
- ETH Zurich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Sharon Mitchell
- ETH Zurich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Takuya F. Segawa
- ETH Zurich; Department of Chemistry and Applied Biosciences; Laboratory of Physical Chemistry; Vladimir-Prelog-Weg 2 8093 Zurich Switzerland
| | - Roland Hauert
- Empa; Swiss Federal Laboratories for Materials Science and Technology; Überlandstrasse 129 8600 Dübendorf Switzerland
| | - Charlotte Drouilly
- Total Research & Technology Feluy; Zone Industrielle Feluy C 7181 Seneffe Belgium
| | - Daniel Curulla-Ferré
- Total Research & Technology Feluy; Zone Industrielle Feluy C 7181 Seneffe Belgium
| | - Javier Pérez-Ramírez
- ETH Zurich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
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32
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Martin O, Martín AJ, Mondelli C, Mitchell S, Segawa TF, Hauert R, Drouilly C, Curulla-Ferré D, Pérez-Ramírez J. Indium Oxide as a Superior Catalyst for Methanol Synthesis by CO2 Hydrogenation. Angew Chem Int Ed Engl 2016; 55:6261-5. [PMID: 26991730 DOI: 10.1002/anie.201600943] [Citation(s) in RCA: 393] [Impact Index Per Article: 49.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 02/21/2016] [Indexed: 11/10/2022]
Abstract
Methanol synthesis by CO2 hydrogenation is attractive in view of avoiding the environmental implications associated with the production of the traditional syngas feedstock and mitigating global warming. However, there still is a lack of efficient catalysts for such alternative processes. Herein, we unveil the high activity, 100 % selectivity, and remarkable stability for 1000 h on stream of In2 O3 supported on ZrO2 under industrially relevant conditions. This strongly contrasts to the benchmark Cu-ZnO-Al2 O3 catalyst, which is unselective and experiences rapid deactivation. In-depth characterization of the In2 O3 -based materials points towards a mechanism rooted in the creation and annihilation of oxygen vacancies as active sites, whose amount can be modulated in situ by co-feeding CO and boosted through electronic interactions with the zirconia carrier. These results constitute a promising basis for the design of a prospective technology for sustainable methanol production.
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Affiliation(s)
- Oliver Martin
- ETH Zurich, Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
| | - Antonio J Martín
- ETH Zurich, Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
| | - Cecilia Mondelli
- ETH Zurich, Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
| | - Sharon Mitchell
- ETH Zurich, Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
| | - Takuya F Segawa
- ETH Zurich, Department of Chemistry and Applied Biosciences, Laboratory of Physical Chemistry, Vladimir-Prelog-Weg 2, 8093, Zurich, Switzerland
| | - Roland Hauert
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600, Dübendorf, Switzerland
| | - Charlotte Drouilly
- Total Research & Technology Feluy, Zone Industrielle Feluy C, 7181, Seneffe, Belgium
| | - Daniel Curulla-Ferré
- Total Research & Technology Feluy, Zone Industrielle Feluy C, 7181, Seneffe, Belgium
| | - Javier Pérez-Ramírez
- ETH Zurich, Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland.
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33
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Martin O, Martín AJ, Mondelli C, Mitchell S, Segawa TF, Hauert R, Drouilly C, Curulla-Ferré D, Pérez-Ramírez J. Indium Oxide as a Superior Catalyst for Methanol Synthesis by CO2
Hydrogenation. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600943] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Oliver Martin
- ETH Zurich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Antonio J. Martín
- ETH Zurich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Cecilia Mondelli
- ETH Zurich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Sharon Mitchell
- ETH Zurich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Takuya F. Segawa
- ETH Zurich; Department of Chemistry and Applied Biosciences; Laboratory of Physical Chemistry; Vladimir-Prelog-Weg 2 8093 Zurich Switzerland
| | - Roland Hauert
- Empa; Swiss Federal Laboratories for Materials Science and Technology; Überlandstrasse 129 8600 Dübendorf Switzerland
| | - Charlotte Drouilly
- Total Research & Technology Feluy; Zone Industrielle Feluy C 7181 Seneffe Belgium
| | - Daniel Curulla-Ferré
- Total Research & Technology Feluy; Zone Industrielle Feluy C 7181 Seneffe Belgium
| | - Javier Pérez-Ramírez
- ETH Zurich; Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
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34
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Huber L, Ruch P, Hauert R, Saucke G, Matam SK, Michel B, Koebel MM. Monolithic nitrogen-doped carbon as a water sorbent for high-performance adsorption cooling. RSC Adv 2016. [DOI: 10.1039/c6ra00548a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In the present study, we report on the development of monolithic, resin-based carbon adsorbents for adsorption heat pumps optimized for water as a sorbent.
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Affiliation(s)
- Lukas Huber
- Empa Swiss Federal Laboratories for Material Science & Technology
- Laboratory for Building Energy Materials and Components
- CH-8600 Dübendorf
- Switzerland
| | | | - Roland Hauert
- Empa Swiss Federal Laboratories for Material Science & Technology
- Laboratory for Joining Technologies and Corrosion
- CH-8600 Dübendorf
- Switzerland
| | - Gesine Saucke
- Empa Swiss Federal Laboratories for Material Science & Technology
- Materials for Energy Conversion Laboratory
- CH-8600 Dübendorf
- Switzerland
| | - Santhosh Kumar Matam
- Empa Swiss Federal Laboratories for Material Science & Technology
- Materials for Energy Conversion Laboratory
- CH-8600 Dübendorf
- Switzerland
| | | | - Matthias M. Koebel
- Empa Swiss Federal Laboratories for Material Science & Technology
- Laboratory for Building Energy Materials and Components
- CH-8600 Dübendorf
- Switzerland
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35
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Huber L, Ruch P, Hauert R, Matam SK, Saucke G, Yoon S, Zhang Y, Koebel MM. Water sorption behavior of physically and chemically activated monolithic nitrogen doped carbon for adsorption cooling. RSC Adv 2016. [DOI: 10.1039/c6ra18660b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this work, nitrogen doped resorcinol–melamine–formaldehyde (RMF) resins were synthesized, pyrolyzed and physically activated with CO2.
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Affiliation(s)
- Lukas Huber
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Laboratory for Building Energy Materials and Components
- CH-8600 Dübendorf
- Switzerland
| | | | - Roland Hauert
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Laboratory for Joining Technologies & Corrosion
- CH-8600 Dübendorf
- Switzerland
| | - Santhosh Kumar Matam
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Materials for Energy Conversion Laboratory
- CH-8600 Dübendorf
- Switzerland
| | - Gesine Saucke
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Materials for Energy Conversion Laboratory
- CH-8600 Dübendorf
- Switzerland
| | - Songhak Yoon
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Materials for Energy Conversion Laboratory
- CH-8600 Dübendorf
- Switzerland
| | - Yucheng Zhang
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Electron Microscopy Center
- CH-8600 Dübendorf
- Switzerland
| | - Matthias M. Koebel
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Laboratory for Building Energy Materials and Components
- CH-8600 Dübendorf
- Switzerland
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36
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Lin R, Amrute AP, Krumeich F, Lázár K, Hauert R, Yulikov M, Pérez-Ramírez J. Phase-controlled synthesis of iron phosphates via phosphation of β-FeOOH nanorods. CrystEngComm 2016. [DOI: 10.1039/c6ce00501b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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37
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Tao Y, Navaretti P, Hauert R, Grob U, Poggio M. Permanent reduction of dissipation in nanomechanical Si resonators by chemical surface protection. Nanotechnology 2015; 26:465501. [PMID: 26501931 DOI: 10.1088/0957-4484/26/46/465501] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report on mechanical dissipation measurements carried out on thin (∼100 nm), single-crystal silicon cantilevers with varying chemical surface termination. We find that the 1-2 nm-thick native oxide layer of silicon contributes about 85% to the friction of the mechanical resonance. We show that the mechanical friction is proportional to the thickness of the oxide layer and that it crucially depends on oxide formation conditions. We further demonstrate that chemical surface protection by nitridation, liquid-phase hydrosilylation, or gas-phase hydrosilylation can inhibit rapid oxide formation in air and results in a permanent improvement of the mechanical quality factor between three- and five-fold. This improvement extends to cryogenic temperatures. Presented recipes can be directly integrated with standard cleanroom processes and may be especially beneficial for ultrasensitive nanomechanical force- and mass sensors, including silicon cantilevers, membranes, or nanowires.
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Affiliation(s)
- Y Tao
- Department of Physics, ETH Zurich, Otto Stern Weg 1, 8093 Zurich, Switzerland. Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge MA 02139, USA
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38
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Martin O, Mondelli C, Curulla-Ferré D, Drouilly C, Hauert R, Pérez-Ramírez J. Zinc-Rich Copper Catalysts Promoted by Gold for Methanol Synthesis. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00877] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Oliver Martin
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8093 Zurich, Switzerland
| | - Cecilia Mondelli
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8093 Zurich, Switzerland
| | - Daniel Curulla-Ferré
- Total Research & Technology Feluy, Zone Industrielle Feluy C, B-7181 Seneffe, Belgium
| | - Charlotte Drouilly
- Total Research & Technology Feluy, Zone Industrielle Feluy C, B-7181 Seneffe, Belgium
| | - Roland Hauert
- Empa, Swiss Federal
Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Javier Pérez-Ramírez
- Institute
for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8093 Zurich, Switzerland
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39
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Fodor D, Krumeich F, Hauert R, van Bokhoven JA. Inside Back Cover: Differences Between Individual ZSM-5 Crystals in Forming Hollow Single Crystals and Mesopores During Base Leaching (Chem. Eur. J. 16/2015). Chemistry 2015. [DOI: 10.1002/chem.201590065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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40
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Fodor D, Krumeich F, Hauert R, van Bokhoven JA. Differences Between Individual ZSM-5 Crystals in Forming Hollow Single Crystals and Mesopores During Base Leaching. Chemistry 2015; 21:6272-7. [DOI: 10.1002/chem.201406182] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2014] [Indexed: 11/07/2022]
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41
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Janczak-Rusch J, Chiodi M, Cancellieri C, Moszner F, Hauert R, Pigozzi G, Jeurgens LPH. Structural evolution of Ag–Cu nano-alloys confined between AlN nano-layers upon fast heating. Phys Chem Chem Phys 2015; 17:28228-38. [DOI: 10.1039/c5cp00782h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The paper presents a first comprehensive experimental investigation of the structural evolution of eutectic Ag–Cu nano-alloys, as confined between inert AlN barriers in a nano-multilayered configuration, upon fast heating.
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Affiliation(s)
- J. Janczak-Rusch
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Laboratory for Joining and Interface Technology
- 8600 Dübendorf
- Switzerland
| | - M. Chiodi
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Laboratory for Joining and Interface Technology
- 8600 Dübendorf
- Switzerland
| | - C. Cancellieri
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Laboratory for Joining and Interface Technology
- 8600 Dübendorf
- Switzerland
| | - F. Moszner
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Laboratory for Joining and Interface Technology
- 8600 Dübendorf
- Switzerland
| | - R. Hauert
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Laboratory for Joining and Interface Technology
- 8600 Dübendorf
- Switzerland
| | - G. Pigozzi
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Laboratory for Joining and Interface Technology
- 8600 Dübendorf
- Switzerland
| | - L. P. H. Jeurgens
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- Laboratory for Joining and Interface Technology
- 8600 Dübendorf
- Switzerland
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42
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Dapsens PY, Mondelli C, Jagielski J, Hauert R, Pérez-Ramírez J. Hierarchical Sn-MFI zeolites prepared by facile top-down methods for sugar isomerisation. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00172a] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Ohashi K, Rosskopf T, Watanabe H, Loretz M, Tao Y, Hauert R, Tomizawa S, Ishikawa T, Ishi-Hayase J, Shikata S, Degen CL, Itoh KM. Negatively charged nitrogen-vacancy centers in a 5 nm thin 12C diamond film. Nano Lett 2013; 13:4733-4738. [PMID: 24020334 DOI: 10.1021/nl402286v] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report successful introduction of negatively charged nitrogen-vacancy (NV(-)) centers in a 5 nm thin, isotopically enriched ([(12)C] = 99.99%) diamond layer by CVD. The present method allows for the formation of NV(-) in such a thin layer even when the surface is terminated by hydrogen atoms. NV(-) centers are found to have spin coherence times of between T2 ~ 10-100 μs at room temperature. Changing the surface termination to oxygen or fluorine leads to a slight increase in the NV(-) density, but not to any significant change in T2. The minimum detectable magnetic field estimated by this T2 is 3 nT after 100 s of averaging, which would be sufficient for the detection of nuclear magnetic fields exerted by a single proton. We demonstrate the suitability for nanoscale NMR by measuring the fluctuating field from ~10(4) proton nuclei placed on top of the 5 nm diamond film.
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Affiliation(s)
- K Ohashi
- School of Fundamental Science and Technology, Keio University , Yokohama 223-8522, Japan
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44
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Amrute AP, Mondelli C, Schmidt T, Hauert R, Pérez-Ramírez J. Back Cover: Industrial RuO 2-Based Deacon Catalysts: Carrier Stabilization and Active Phase Content Optimization (ChemCatChem 3/2013). ChemCatChem 2013. [DOI: 10.1002/cctc.201390011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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45
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Amrute AP, Mondelli C, Schmidt T, Hauert R, Pérez-Ramírez J. Industrial RuO2-Based Deacon Catalysts: Carrier Stabilization and Active Phase Content Optimization. ChemCatChem 2013. [DOI: 10.1002/cctc.201200704] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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46
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Ammann M, Hauert R, Burtscher H, Siegmann HC. Photoelectric charging of ultrafine volcanic aerosols: Detection of Cu(I) as a tracer of chlorides in magmatic gases. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/92jb01870] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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47
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Hauert R, Falub CV, Thorwarth G, Thorwarth K, Affolter C, Stiefel M, Podleska LE, Taeger G. Retrospective lifetime estimation of failed and explanted diamond-like carbon coated hip joint balls. Acta Biomater 2012; 8:3170-6. [PMID: 22521966 DOI: 10.1016/j.actbio.2012.04.016] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Revised: 04/05/2012] [Accepted: 04/10/2012] [Indexed: 11/16/2022]
Abstract
Diamond-like carbon (DLC) coatings are known to have extremely low wear in many technical applications. The application of DLC as a coating has aimed at lowering wear and to preventing wear particle-induced osteolysis in artificial hip joints. In a medical study femoral heads coated with diamond-like amorphous carbon, a subgroup of DLC, articulating against polyethylene cups were implanted between 1993 and 1995. Within 8.5 years about half of the hip joints had to be revised due to aseptic loosening. The explanted femoral heads showed many spots of local coating delamination. Several of these explanted coated TiAlV femoral heads have been analyzed to investigate the reason for this failure. Raman analysis and X-ray photoelectron spectroscopy (XPS) depth profiling showed that the coating consists of diamond-like amorphous carbon, several Si-doped layers and an adhesion-promoting Si interlayer. Focused ion beam (FIB) transverse cuts revealed that the delamination of the coatings is caused by in vivo corrosion of the Si interlayer. Using a delamination test set-up dissolution of the silicon adhesion-promoting interlayer at a speed of more than 100 μm year(-1) was measured in vitro in solutions containing proteins. Although proteins are not directly involved in the corrosion reactions, they can block existing small cracks and crevices under the coating, hindering the exchange of liquid. This results in a build-up of crevice corrosion conditions in the crack, causing a slow dissolution of the Si interlayer.
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Affiliation(s)
- R Hauert
- Empa, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland.
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48
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Abstract
AbstractAmorphous hydrogenated carbon films are of technological interest as protection coatings due to their special properties such as high hardness, chemical inertness, electrical insulation and infrared transparency. However, some applications still suffer from the poor thermal stability and adhesion problems of these coatings. To ensure good adhesion, especially on hardened steels and non-carbide forming substrates, an extra interlayer has to be deposited first. Often a silicon containing interlayer, Si-a-C:H for example, is used for this purpose. This Si-a-C:H interface layer was deposited by rf plasma deposition from tetramethylsilane. Then a-C:H films containing Si-O with a varying silicon content were produced from a mixture of acetylene and hexamethyldisiloxane. The structural changes upon annealing of these films were investigated using Raman spectroscopy. The analysis of the development of the different peaks upon annealing temperature reveals the transition from the amorphous structure to the more graphitic-like structure. This transition temperature increases by as much as 100°C when silicon is incorporated into the DLC film. However, when Si-O is incorporated instead of only silicon the same increase in temperature stability is observed.
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49
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Tingaut P, Hauert R, Zimmermann T. Highly efficient and straightforward functionalization of cellulose films with thiol-ene click chemistry. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11620g] [Citation(s) in RCA: 108] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Wimmer MA, Fischer A, Büscher R, Pourzal R, Sprecher C, Hauert R, Jacobs JJ. Wear mechanisms in metal-on-metal bearings: the importance of tribochemical reaction layers. J Orthop Res 2010; 28:436-43. [PMID: 19877285 DOI: 10.1002/jor.21020] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Metal-on-metal (MoM) bearings are at the forefront in hip resurfacing arthroplasty. Because of their good wear characteristics and design flexibility, MoM bearings are gaining wider acceptance with market share reaching nearly 10% worldwide. However, concerns remain regarding potential detrimental effects of metal particulates and ion release. Growing evidence is emerging that the local cell response is related to the amount of debris generated by these bearing couples. Thus, an urgent clinical need exists to delineate the mechanisms of debris generation to further reduce wear and its adverse effects. In this study, we investigated the microstructural and chemical composition of the tribochemical reaction layers forming at the contacting surfaces of metallic bearings during sliding motion. Using X-ray photoelectron spectroscopy and transmission electron microscopy with coupled energy dispersive X-ray and electron energy loss spectroscopy, we found that the tribolayers are nanocrystalline in structure, and that they incorporate organic material stemming from the synovial fluid. This process, which has been termed "mechanical mixing," changes the bearing surface of the uppermost 50 to 200 nm from pure metallic to an organic composite material. It hinders direct metal contact (thus preventing adhesion) and limits wear. This novel finding of a mechanically mixed zone of nanocrystalline metal and organic constituents provides the basis for understanding particle release and may help in identifying new strategies to reduce MoM wear.
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Affiliation(s)
- Markus A Wimmer
- Department of Orthopedic Surgery, Rush University Medical Center, 1653 West Congress Parkway, Chicago, Illinois 60612, USA.
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