101
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Tao F(F, Crozier PA. Atomic-Scale Observations of Catalyst Structures under Reaction Conditions and during Catalysis. Chem Rev 2016; 116:3487-539. [DOI: 10.1021/cr5002657] [Citation(s) in RCA: 203] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Franklin (Feng) Tao
- Department
of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045, United States
- Department
of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Peter A. Crozier
- School
of Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287, United States
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102
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Zohar S, Venugopalan N, Kissick D, Becker M, Xu S, Makarov O, Stepanov S, Ogata C, Sanishvili R, Fischetti RF. Rapid in situ X-ray position stabilization via extremum seeking feedback. JOURNAL OF SYNCHROTRON RADIATION 2016; 23:443-447. [PMID: 26917131 PMCID: PMC4768767 DOI: 10.1107/s1600577516000679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 01/13/2016] [Indexed: 06/05/2023]
Abstract
X-ray beam stability is crucial for acquiring high-quality data at synchrotron beamline facilities. When the X-ray beam and defining apertures are of similar dimensions, small misalignments driven by position instabilities give rise to large intensity fluctuations. This problem is solved using extremum seeking feedback control (ESFC) for in situ vertical beam position stabilization. In this setup, the intensity spatial gradient required for ESFC is determined by phase comparison of intensity oscillations downstream from the sample with pre-existing vertical beam oscillations. This approach compensates for vertical position drift from all sources with position recovery times <6 s and intensity stability through a 5 µm aperture measured at 1.5% FWHM over a period of 8 hours.
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Affiliation(s)
- S Zohar
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, BLDG 436, Argonne, IL 60439, USA
| | - N Venugopalan
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, BLDG 436, Argonne, IL 60439, USA
| | - D Kissick
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, BLDG 436, Argonne, IL 60439, USA
| | - M Becker
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, BLDG 436, Argonne, IL 60439, USA
| | - S Xu
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, BLDG 436, Argonne, IL 60439, USA
| | - O Makarov
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, BLDG 436, Argonne, IL 60439, USA
| | - S Stepanov
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, BLDG 436, Argonne, IL 60439, USA
| | - C Ogata
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, BLDG 436, Argonne, IL 60439, USA
| | - R Sanishvili
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, BLDG 436, Argonne, IL 60439, USA
| | - R F Fischetti
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, BLDG 436, Argonne, IL 60439, USA
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103
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Baier S, Damsgaard CD, Scholz M, Benzi F, Rochet A, Hoppe R, Scherer T, Shi J, Wittstock A, Weinhausen B, Wagner JB, Schroer CG, Grunwaldt JD. In Situ Ptychography of Heterogeneous Catalysts using Hard X-Rays: High Resolution Imaging at Ambient Pressure and Elevated Temperature. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2016; 22:178-188. [PMID: 26914998 DOI: 10.1017/s1431927615015573] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A new closed cell is presented for in situ X-ray ptychography which allows studies under gas flow and at elevated temperature. In order to gain complementary information by transmission and scanning electron microscopy, the cell makes use of a Protochips E-chipTM which contains a small, thin electron transparent window and allows heating. Two gold-based systems, 50 nm gold particles and nanoporous gold as a relevant catalyst sample, were used for studying the feasibility of the cell. Measurements showing a resolution around 40 nm have been achieved under a flow of synthetic air and during heating up to temperatures of 933 K. An elevated temperature exhibited little influence on image quality and resolution. With this study, the potential of in situ hard X-ray ptychography for investigating annealing processes of real catalyst samples is demonstrated. Furthermore, the possibility to use the same sample holder for ex situ electron microscopy before and after the in situ study underlines the unique possibilities available with this combination of electron microscopy and X-ray microscopy on the same sample.
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Affiliation(s)
- Sina Baier
- 1Institute for Chemical Technology and Polymer Chemistry,Karlsruhe Institute of Technology,76131 Karlsruhe,Germany
| | - Christian D Damsgaard
- 2Center for Electron Nanoscopy,Technical University of Denmark,2800 Kgs. Lyngby,Denmark
| | - Maria Scholz
- 4Deutsches Elektronen-Synchrotron DESY,Notkestr. 85,22607 Hamburg,Germany
| | - Federico Benzi
- 1Institute for Chemical Technology and Polymer Chemistry,Karlsruhe Institute of Technology,76131 Karlsruhe,Germany
| | - Amélie Rochet
- 1Institute for Chemical Technology and Polymer Chemistry,Karlsruhe Institute of Technology,76131 Karlsruhe,Germany
| | - Robert Hoppe
- 5Institute of Structural Physics,Technische Universität Dresden,01062 Dresden,Germany
| | - Torsten Scherer
- 6Institute of Nanotechnology,Karlsruhe Institute of Technology,76021 Karlsruhe,Germany
| | - Junjie Shi
- 8Angewandte und Physikalische Chemie,University of Bremen,28359 Bremen,Germany
| | - Arne Wittstock
- 8Angewandte und Physikalische Chemie,University of Bremen,28359 Bremen,Germany
| | | | - Jakob B Wagner
- 2Center for Electron Nanoscopy,Technical University of Denmark,2800 Kgs. Lyngby,Denmark
| | | | - Jan-Dierk Grunwaldt
- 1Institute for Chemical Technology and Polymer Chemistry,Karlsruhe Institute of Technology,76131 Karlsruhe,Germany
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104
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Tay SER, Goode AE, Nelson Weker J, Cruickshank AA, Heutz S, Porter AE, Ryan MP, Toney MF. Direct in situ observation of ZnO nucleation and growth via transmission X-ray microscopy. NANOSCALE 2016; 8:1849-1853. [PMID: 26738407 DOI: 10.1039/c5nr07019h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The nucleation and growth of a nanostructure controls its size and morphology, and ultimately its functional properties. Hence it is crucial to investigate growth mechanisms under relevant growth conditions at the nanometer length scale. Here we image the nucleation and growth of electrodeposited ZnO nanostructures in situ, using a transmission X-ray microscope and specially designed electrochemical cell. We show that this imaging technique leads to new insights into the nucleation and growth mechanisms in electrodeposited ZnO including direct, in situ observations of instantaneous versus delayed nucleation.
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Affiliation(s)
- S E R Tay
- Department of Materials and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK.
| | - A E Goode
- Department of Materials and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK.
| | - J Nelson Weker
- Stanford Synchrotron Radiation Lightsource, Stanford University, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - A A Cruickshank
- Department of Materials and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK.
| | - S Heutz
- Department of Materials and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK.
| | - A E Porter
- Department of Materials and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK.
| | - M P Ryan
- Department of Materials and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK.
| | - M F Toney
- Stanford Synchrotron Radiation Lightsource, Stanford University, 2575 Sand Hill Road, Menlo Park, California 94025, USA
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105
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Karim W, Kleibert A, Hartfelder U, Balan A, Gobrecht J, van Bokhoven JA, Ekinci Y. Size-dependent redox behavior of iron observed by in-situ single nanoparticle spectro-microscopy on well-defined model systems. Sci Rep 2016; 6:18818. [PMID: 26732372 PMCID: PMC4702129 DOI: 10.1038/srep18818] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 11/26/2015] [Indexed: 11/24/2022] Open
Abstract
Understanding the chemistry of nanoparticles is crucial in many applications. Their synthesis in a controlled manner and their characterization at the single particle level is essential to gain deeper insight into chemical mechanisms. In this work, single nanoparticle spectro-microscopy with top-down nanofabrication is demonstrated to study individual iron nanoparticles of nine different lateral dimensions from 80 nm down to 6 nm. The particles are probed simultaneously, under same conditions, during in-situ redox reaction using X-ray photoemission electron microscopy elucidating the size effect during the early stage of oxidation, yielding time-dependent evolution of iron oxides and the mechanism for the inter-conversion of oxides in nanoparticles. Fabrication of well-defined system followed by visualization and investigation of singled-out particles eliminates the ambiguities emerging from dispersed nanoparticles and reveals a significant increase in the initial rate of oxidation with decreasing size, but the reactivity per active site basis and the intrinsic chemical properties in the particles remain the same in the scale of interest. This advance of nanopatterning together with spatially-resolved single nanoparticle X-ray absorption spectroscopy will guide future discourse in understanding the impact of confinement of metal nanoparticles and pave way to solve fundamental questions in material science, chemical physics, magnetism, nanomedicine and nanocatalysis.
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Affiliation(s)
- Waiz Karim
- Laboratory for Micro and Nanotechnology, Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland.,Institute for Chemical and Bioengineering, ETH Zurich, Switzerland
| | - Armin Kleibert
- Swiss Light Source, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Urs Hartfelder
- Institute for Chemical and Bioengineering, ETH Zurich, Switzerland
| | - Ana Balan
- Swiss Light Source, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Jens Gobrecht
- Laboratory for Micro and Nanotechnology, Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland
| | - Jeroen A van Bokhoven
- Institute for Chemical and Bioengineering, ETH Zurich, Switzerland.,Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland
| | - Yasin Ekinci
- Laboratory for Micro and Nanotechnology, Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland
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106
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107
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Cats KH, Andrews JC, Stéphan O, March K, Karunakaran C, Meirer F, de Groot FMF, Weckhuysen BM. Active phase distribution changes within a catalyst particle during Fischer–Tropsch synthesis as revealed by multi-scale microscopy. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01524c] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new combination of three chemical imaging methods has been developed and applied to fresh and spent co-based Fischer–Tropsch catalysts.
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Affiliation(s)
- K. H. Cats
- Inorganic Chemistry and Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- 3584 CG Utrecht
- The Netherlands
| | - J. C. Andrews
- Stanford Synchrotron Light Source
- SLAC National Accelerator Laboratory
- Menlo Park
- USA
| | - O. Stéphan
- Laboratoire de Physique des Solides
- Université Paris Sud
- 91405 Orsay
- France
| | - K. March
- Laboratoire de Physique des Solides
- Université Paris Sud
- 91405 Orsay
- France
| | | | - F. Meirer
- Inorganic Chemistry and Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- 3584 CG Utrecht
- The Netherlands
| | - F. M. F. de Groot
- Inorganic Chemistry and Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- 3584 CG Utrecht
- The Netherlands
| | - B. M. Weckhuysen
- Inorganic Chemistry and Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- 3584 CG Utrecht
- The Netherlands
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108
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Yu JW, Zhu W, Zhang YW. Solution synthesis protocols for shaping mixed valent oxide crystalline particles as robust catalytic materials. Inorg Chem Front 2016. [DOI: 10.1039/c5qi00184f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Recent progress in the solution based shape controlled synthesis of several typical mixed valent oxides which have been used as highly efficient catalytic nanomaterials in some heterogeneous and photocatalytic reactions has been reviewed.
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Affiliation(s)
- Jing-Wen Yu
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry
- College of Chemistry and Molecular Engineering
- Peking University
| | - Wei Zhu
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry
- College of Chemistry and Molecular Engineering
- Peking University
| | - Ya-Wen Zhang
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry
- College of Chemistry and Molecular Engineering
- Peking University
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109
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Takeichi Y, Inami N, Suga H, Miyamoto C, Ueno T, Mase K, Takahashi Y, Ono K. Design and performance of a compact scanning transmission X-ray microscope at the Photon Factory. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:013704. [PMID: 26827325 DOI: 10.1063/1.4940409] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We present a new compact instrument designed for scanning transmission X-ray microscopy. It has piezo-driven linear stages, making it small and light. Optical components from the virtual source point to the detector are located on a single optical table, resulting in a portable instrument that can be operated at a general-purpose spectroscopy beamline without requiring any major reconstruction. Careful consideration has been given to solving the vibration problem common to high-resolution microscopy, so as not to affect the spatial resolution determined by the Fresnel zone plate. Results on bacteriogenic iron oxides, single particle aerosols, and rare-earth permanent magnets are presented as examples of its performance under diverse applications.
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Affiliation(s)
- Y Takeichi
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Japan
| | - N Inami
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Japan
| | - H Suga
- Department of Earth and Planetary Systems Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - C Miyamoto
- Department of Earth and Planetary Systems Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku 113-0033, Japan
| | - T Ueno
- National Institute for Materials Science, 1-2-1 Sengen, Tsukuba 305-0047, Japan
| | - K Mase
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Japan
| | - Y Takahashi
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Japan
| | - K Ono
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Japan
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110
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Chakraborty R, Serdy J, West B, Stuckelberger M, Lai B, Maser J, Bertoni MI, Culpepper ML, Buonassisi T. Development of an in situ temperature stage for synchrotron X-ray spectromicroscopy. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2015; 86:113705. [PMID: 26628142 DOI: 10.1063/1.4935807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In situ characterization of micro- and nanoscale defects in polycrystalline thin-film materials is required to elucidate the physics governing defect formation and evolution during photovoltaic device fabrication and operation. X-ray fluorescence spectromicroscopy is particularly well-suited to study defects in compound semiconductors, as it has a large information depth appropriate to study thick and complex materials, is sensitive to trace amounts of atomic species, and provides quantitative elemental information, non-destructively. Current in situ methods using this technique typically require extensive sample preparation. In this work, we design and build an in situ temperature stage to study defect kinetics in thin-film solar cells under actual processing conditions, requiring minimal sample preparation. Careful selection of construction materials also enables controlled non-oxidizing atmospheres inside the sample chamber such as H2Se and H2S. Temperature ramp rates of up to 300 °C/min are achieved, with a maximum sample temperature of 600 °C. As a case study, we use the stage for synchrotron X-ray fluorescence spectromicroscopy of CuIn(x)Ga(1-x)Se2 (CIGS) thin-films and demonstrate predictable sample thermal drift for temperatures 25-400 °C, allowing features on the order of the resolution of the measurement technique (125 nm) to be tracked while heating. The stage enables previously unattainable in situ studies of nanoscale defect kinetics under industrially relevant processing conditions, allowing a deeper understanding of the relationship between material processing parameters, materials properties, and device performance.
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Affiliation(s)
- R Chakraborty
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - J Serdy
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - B West
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA
| | - M Stuckelberger
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA
| | - B Lai
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - J Maser
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - M I Bertoni
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA
| | - M L Culpepper
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - T Buonassisi
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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111
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Han HL, Melaet G, Alayoglu S, Somorjai GA. In Situ Microscopy and Spectroscopy Applied to Surfaces at Work. ChemCatChem 2015. [DOI: 10.1002/cctc.201500642] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hui-Ling Han
- Materials Sciences Division; Lawrence Berkeley National Laboratory; 1 Cyclotron Road Berkeley CA 94720 USA
| | - Gérôme Melaet
- Materials Sciences Division; Lawrence Berkeley National Laboratory; 1 Cyclotron Road Berkeley CA 94720 USA
| | - Selim Alayoglu
- Chemical Sciences Division; Lawrence Berkeley National Laboratory; 1 Cyclotron Road Berkeley CA 94720-8176 USA
| | - Gabor A. Somorjai
- Chemical Sciences Division; Lawrence Berkeley National Laboratory; 1 Cyclotron Road Berkeley CA 94720-8176 USA
- College of Chemistry; University of California at Berkeley; 420 Latimer Hall Berkeley CA 94720-1460 USA
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112
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Complex structural dynamics of nanocatalysts revealed in Operando conditions by correlated imaging and spectroscopy probes. Nat Commun 2015; 6:7583. [PMID: 26119246 PMCID: PMC4491830 DOI: 10.1038/ncomms8583] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 05/20/2015] [Indexed: 01/12/2023] Open
Abstract
Understanding how heterogeneous catalysts change size, shape and structure during chemical reactions is limited by the paucity of methods for studying catalytic ensembles in working state, that is, in operando conditions. Here by a correlated use of synchrotron X-ray absorption spectroscopy and scanning transmission electron microscopy in operando conditions, we quantitatively describe the complex structural dynamics of supported Pt catalysts exhibited during an exemplary catalytic reaction—ethylene hydrogenation. This work exploits a microfabricated catalytic reactor compatible with both probes. The results demonstrate dynamic transformations of the ensemble of Pt clusters that spans a broad size range throughout changing reaction conditions. This method is generalizable to quantitative operando studies of complex systems using a wide variety of X-ray and electron-based experimental probes. Studying a catalyst during reaction (operando conditions) can give significant insights into the changes a catalyst undergoes. Here, the authors use an operando approach to correlate X-ray spectroscopy and electron based imaging techniques to measure the dynamic changes in Pt nanoparticles during the catalytic hydrogenation of ethylene.
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113
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Guo X, Wang Z, Wu J, Wang J, Zhu YJ, Sham TK. Imaging of drug loading distributions in individual microspheres of calcium silicate hydrate--an X-ray spectromicroscopy study. NANOSCALE 2015; 7:6767-6773. [PMID: 25804516 DOI: 10.1039/c4nr07471h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Imaging is one of the most direct and ideal ways to track drug loading distributions in drug carriers on the molecular level, which will facilitate the optimization of drug carriers and drug loading capacities. Herein, we report the mapping of an individual mesoporous calcium silicate hydrate (CSH) microsphere before and after the loading of ibuprofen (IBU) and the interactions between drug carriers and drug molecules simultaneously by scanning transmission X-ray microscopy (STXM). Nanoscaled X-ray absorption near edge structure (XANES) spectroscopy clearly indicates that IBU is bonded to calcium and silicate sites via carboxylic acid groups. More importantly, STXM has been successfully used to determine the absolute thickness of IBU, revealing its distribution in the CSH microsphere.
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Affiliation(s)
- Xiaoxuan Guo
- Department of Chemistry, University of Western Ontario, London, Ontario N6A 5B7, Canada.
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114
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Chen X, Xiao J, Wang J, Deng D, Hu Y, Zhou J, Yu L, Heine T, Pan X, Bao X. Visualizing electronic interactions between iron and carbon by X-ray chemical imaging and spectroscopy. Chem Sci 2015; 6:3262-3267. [PMID: 28706694 PMCID: PMC5490425 DOI: 10.1039/c5sc00353a] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 03/26/2015] [Indexed: 11/21/2022] Open
Abstract
Pod-like carbon nanotube with encapsulated iron particles (Pod-Fe) was used as a well-defined model to study the electronic interaction between carbon shells and the iron particles by scanning transmission X-ray microscopy (STXM).
The electronic interaction of a catalyst and its support is of vital importance to its catalytic performance. However, it is still a great challenge to directly probe the interaction due to the lack of well-defined models and efficient technical means. In this study, we report that pod-like carbon nanotubes with encapsulated iron particles (Pod-Fe) and scanning transmission X-ray microscopy (STXM) can be used as an ideal model and technique to study the electronic interaction between carbon shells and iron particles. The chemical imaging and spectroscopy of Pod-Fe by STXM show that the local electronic structures at C K-edge near edge (π*) of carbon shells can be significantly modified by the encapsulated iron particles, which promotes the adsorption of oxygen-containing species, and thereby further modifies the electronic structure (π* and σ*) of the carbon shells. Moreover, computed X-ray absorption near edge structure spectra (XANES) confirmed the electronic modifications of carbon shells by the encapsulated iron particles. The present study provides a direct evidence of electronic interactions with simultaneously collected images and spectra, which can promote the understanding towards the nature of active sites and supports.
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Affiliation(s)
- Xiaoqi Chen
- State Key Laboratory of Catalysis , iChEM , Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Zhongshan Road 457 , Dalian , 116023 , China . ; ; ; Tel: +86-411-84686637
| | - Jianping Xiao
- State Key Laboratory of Catalysis , iChEM , Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Zhongshan Road 457 , Dalian , 116023 , China . ; ; ; Tel: +86-411-84686637
| | - Jian Wang
- Canadian Light Source Inc. , University of Saskatchewan , 44 Innovation Boulevard , Saskatoon , SK S7N 2V3 , Canada
| | - Dehui Deng
- State Key Laboratory of Catalysis , iChEM , Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Zhongshan Road 457 , Dalian , 116023 , China . ; ; ; Tel: +86-411-84686637
| | - Yongfeng Hu
- Canadian Light Source Inc. , University of Saskatchewan , 44 Innovation Boulevard , Saskatoon , SK S7N 2V3 , Canada
| | - Jigang Zhou
- Canadian Light Source Inc. , University of Saskatchewan , 44 Innovation Boulevard , Saskatoon , SK S7N 2V3 , Canada
| | - Liang Yu
- State Key Laboratory of Catalysis , iChEM , Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Zhongshan Road 457 , Dalian , 116023 , China . ; ; ; Tel: +86-411-84686637
| | - Thomas Heine
- Department of Physics and Earth Science , Jacobs University Bremen , Campus Ring 1 , 28759 Bremen , Germany
| | - Xiulian Pan
- State Key Laboratory of Catalysis , iChEM , Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Zhongshan Road 457 , Dalian , 116023 , China . ; ; ; Tel: +86-411-84686637
| | - Xinhe Bao
- State Key Laboratory of Catalysis , iChEM , Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Zhongshan Road 457 , Dalian , 116023 , China . ; ; ; Tel: +86-411-84686637
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115
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Goode AE, Porter AE, Ryan MP, McComb DW. Correlative electron and X-ray microscopy: probing chemistry and bonding with high spatial resolution. NANOSCALE 2015; 7:1534-1548. [PMID: 25532909 DOI: 10.1039/c4nr05922k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Two powerful and complementary techniques for chemical characterisation of nanoscale systems are electron energy-loss spectroscopy in the scanning transmission electron microscope, and X-ray absorption spectroscopy in the scanning transmission X-ray microscope. A correlative approach to spectro-microscopy may not only bridge the gaps in spatial and spectral resolution which exist between the two instruments, but also offer unique opportunities for nanoscale characterisation. This review will discuss the similarities of the two spectroscopy techniques and the state of the art for each microscope. Case studies have been selected to illustrate the benefits and limitations of correlative electron and X-ray microscopy techniques. In situ techniques and radiation damage are also discussed.
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Affiliation(s)
- Angela E Goode
- Department of Materials, Imperial College London, London SW7 2AZ, UK.
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116
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Fu D, Dai W, Xu X, Mao W, Su J, Zhang Z, Shi B, Smith J, Li P, Xu J, Han YF. Probing The Structure Evolution of Iron-Based Fischer-Tropsch to Produce Olefins by Operando Raman Spectroscopy. ChemCatChem 2015. [DOI: 10.1002/cctc.201402980] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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117
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Tsakoumis NE, York APE, Chen D, Rønning M. Catalyst characterisation techniques and reaction cells operating at realistic conditions; towards acquisition of kinetically relevant information. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00269a] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Catalyst characterisation techniques and reaction cells operating at realistic conditions; towards acquisition of kinetically relevant information.
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Affiliation(s)
- Nikolaos E. Tsakoumis
- Department of Chemical Engineering
- Norwegian University of Science and Technology (NTNU)
- NO-7491 Trondheim
- Norway
| | - Andrew P. E. York
- Johnson Matthey Technology Centre
- Blount's Court
- Sonning Common
- Reading RG4 9NH
- UK
| | - De Chen
- Department of Chemical Engineering
- Norwegian University of Science and Technology (NTNU)
- NO-7491 Trondheim
- Norway
| | - Magnus Rønning
- Department of Chemical Engineering
- Norwegian University of Science and Technology (NTNU)
- NO-7491 Trondheim
- Norway
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118
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Wei Y, Parmentier TE, de Jong KP, Zečević J. Tailoring and visualizing the pore architecture of hierarchical zeolites. Chem Soc Rev 2015; 44:7234-61. [DOI: 10.1039/c5cs00155b] [Citation(s) in RCA: 278] [Impact Index Per Article: 30.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This review provides an overview of the different synthesis methods and microscopy techniques for tailoring and visualizing the pore architecture of hierarchical zeolites.
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Affiliation(s)
- Ying Wei
- Inorganic Chemistry and Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- Utrecht
- Netherlands
| | - Tanja E. Parmentier
- Inorganic Chemistry and Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- Utrecht
- Netherlands
| | - Krijn P. de Jong
- Inorganic Chemistry and Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- Utrecht
- Netherlands
| | - Jovana Zečević
- Inorganic Chemistry and Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- Utrecht
- Netherlands
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119
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Liu KL, Kubarev AV, Van Loon J, Uji-i H, De Vos DE, Hofkens J, Roeffaers MBJ. Rationalizing inter- and intracrystal heterogeneities in dealuminated acid mordenite zeolites by stimulated Raman scattering microscopy correlated with super-resolution fluorescence microscopy. ACS NANO 2014; 8:12650-12659. [PMID: 25402756 PMCID: PMC4278416 DOI: 10.1021/nn505576p] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 11/17/2014] [Indexed: 06/04/2023]
Abstract
Dealuminated zeolites are widely used acid catalysts in research and the chemical industry. Bulk-level studies have revealed that the improved catalytic performance results from an enhanced molecular transport as well as from changes in the active sites. However, fully exploiting this information in rational catalyst design still requires insight in the intricate interplay between both. Here we introduce fluorescence and stimulated Raman scattering microscopy to quantify subcrystal reactivity as well as acid site distribution and to probe site accessibility in the set of individual mordenite zeolites. Dealumination effectively introduces significant heterogeneities between different particles and even within individual crystals. Besides enabling direct rationalization of the nanoscale catalytic performance, these observations reveal valuable information on the industrial dealumination process itself.
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Affiliation(s)
- Kuan-Lin Liu
- Department of Chemistry, Faculty of Sciences, KU Leuven, 3001 Heverlee, Belgium
| | - Alexey V. Kubarev
- Centre for Surface Chemistry and Catalysis, Faculty of Bioscience Engineering, KU Leuven, 3001 Heverlee, Belgium
| | - Jordi Van Loon
- Centre for Surface Chemistry and Catalysis, Faculty of Bioscience Engineering, KU Leuven, 3001 Heverlee, Belgium
| | - Hiroshi Uji-i
- Department of Chemistry, Faculty of Sciences, KU Leuven, 3001 Heverlee, Belgium
| | - Dirk E. De Vos
- Centre for Surface Chemistry and Catalysis, Faculty of Bioscience Engineering, KU Leuven, 3001 Heverlee, Belgium
| | - Johan Hofkens
- Department of Chemistry, Faculty of Sciences, KU Leuven, 3001 Heverlee, Belgium
| | - Maarten B. J. Roeffaers
- Centre for Surface Chemistry and Catalysis, Faculty of Bioscience Engineering, KU Leuven, 3001 Heverlee, Belgium
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120
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Zhong J, Zhang H, Sun X, Lee ST. Synchrotron soft X-ray absorption spectroscopy study of carbon and silicon nanostructures for energy applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:7786-806. [PMID: 25204894 DOI: 10.1002/adma.201304507] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2013] [Revised: 11/10/2013] [Indexed: 05/16/2023]
Abstract
Carbon and silicon materials are two of the most important materials involved in the history of the science and technology development. In the last two decades, C and Si nanoscale materials, e.g., carbon nanotubes, graphene, and silicon nanowires, and quantum dots, have also emerged as the most interesting nanomaterials in nanoscience and nanotechnology for their myriad promising applications such as for electronics, sensors, biotechnology, etc. In particular, carbon and silicon nanostructures are being utilized in energy-related applications such as catalysis, batteries, solar cells, etc., with significant advances. Understanding of the nature of surface and electronic structures of nanostructures plays a key role in the development and improvement of energy conversion and storage nanosystems. Synchrotron soft X-ray absorption spectroscopy (XAS) and related techniques, such as X-ray emission spectroscopy (XES) and scanning transmission X-ray microscopy (STXM), show unique capability in revealing the surface and electronic structures of C and Si nanomaterials. In this review, XAS is demonstrated as a powerful technique for probing chemical bonding, the electronic structure, and the surface chemistry of carbon and silicon nanomaterials, which can greatly enhance the fundamental understanding and also applicability of these nanomaterials in energy applications. The focus is on the unique advantages of XAS as a complementary tool to conventional microscopy and spectroscopy for effectively providing chemical and structural information about carbon and silicon nanostructures. The employment of XAS for in situ, real-time study of property evolution of C and Si nanostructures to elucidate the mechanisms in energy conversion or storage processes is also discussed.
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Affiliation(s)
- Jun Zhong
- Soochow University-Western University Centre for Synchrotron Radiation Research, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, China
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121
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Zhao S, Liu XW, Huo CF, Li YW, Wang J, Jiao H. Determining surface structure and stability of ε-Fe2C, χ-Fe5C2, θ-Fe3C and Fe4C phases under carburization environment from combined DFT and atomistic thermodynamic studies. ACTA ACUST UNITED AC 2014. [DOI: 10.1179/2055075814y.0000000007] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- Shu Zhao
- State Key Laboratory of Coal ConversionInstitute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Xing-Wu Liu
- National Energy Center for Coal to Liquids Synfuels China Co., Ltd, Huairou District, Beijing 101400, China
| | - Chun-Fang Huo
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Yong-Wang Li
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein Strasse 29a, 18059 Rostock, Germany
| | - Jianguo Wang
- State Key Laboratory of Coal ConversionInstitute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Haijun Jiao
- National Energy Center for Coal to Liquids Synfuels China Co., Ltd, Huairou District, Beijing 101400, China
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122
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Nanocatalysis II: In Situ Surface Probes of Nano-Catalysts and Correlative Structure–Reactivity Studies. Catal Letters 2014. [DOI: 10.1007/s10562-014-1398-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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123
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124
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Hilhorst J, Marschall F, Tran Thi TN, Last A, Schülli TU. Full-field X-ray diffraction microscopy using polymeric compound refractive lenses. J Appl Crystallogr 2014. [DOI: 10.1107/s1600576714021256] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Diffraction imaging is the science of imaging samples under diffraction conditions. Diffraction imaging techniques are well established in visible light and electron microscopy, and have also been widely employed in X-ray science in the form of X-ray topography. Over the past two decades, interest in X-ray diffraction imaging has taken flight and resulted in a wide variety of methods. This article discusses a new full-field imaging method, which uses polymer compound refractive lenses as a microscope objective to capture a diffracted X-ray beam coming from a large illuminated area on a sample. This produces an image of the diffracting parts of the sample on a camera. It is shown that this technique has added value in the field, owing to its high imaging speed, while being competitive in resolution and level of detail of obtained information. Using a model sample, it is shown that lattice tilts and strain in single crystals can be resolved simultaneously down to 10−3° and Δa/a= 10−5, respectively, with submicrometre resolution over an area of 100 × 100 µm and a total image acquisition time of less than 60 s.
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125
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Takao S, Sekizawa O, Nagamatsu SI, Kaneko T, Yamamoto T, Samjeské G, Higashi K, Nagasawa K, Tsuji T, Suzuki M, Kawamura N, Mizumaki M, Uruga T, Iwasawa Y. Mapping Platinum Species in Polymer Electrolyte Fuel Cells by Spatially Resolved XAFS Techniques. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408845] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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126
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Takao S, Sekizawa O, Nagamatsu SI, Kaneko T, Yamamoto T, Samjeské G, Higashi K, Nagasawa K, Tsuji T, Suzuki M, Kawamura N, Mizumaki M, Uruga T, Iwasawa Y. Mapping Platinum Species in Polymer Electrolyte Fuel Cells by Spatially Resolved XAFS Techniques. Angew Chem Int Ed Engl 2014; 53:14110-4. [DOI: 10.1002/anie.201408845] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Indexed: 11/07/2022]
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127
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Schmitt T, de Groot FMF, Rubensson JE. Prospects of high-resolution resonant X-ray inelastic scattering studies on solid materials, liquids and gases at diffraction-limited storage rings. JOURNAL OF SYNCHROTRON RADIATION 2014; 21:1065-76. [PMID: 25177995 PMCID: PMC4151682 DOI: 10.1107/s1600577514017123] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 07/24/2014] [Indexed: 05/29/2023]
Abstract
The spectroscopic technique of resonant inelastic X-ray scattering (RIXS) will particularly profit from immensely improved brilliance of diffraction-limited storage rings (DLSRs). In RIXS one measures the intensities of excitations as a function of energy and momentum transfer. DLSRs will allow for pushing the achievable energy resolution, signal intensity and the sampled spot size to new limits. With RIXS one nowadays probes a broad range of electronic systems reaching from simple molecules to complex materials displaying phenomena like peculiar magnetism, two-dimensional electron gases, superconductivity, photovoltaic energy conversion and heterogeneous catalysis. In this article the types of improved RIXS studies that will become possible with X-ray beams from DLSRs are envisioned.
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Affiliation(s)
- Thorsten Schmitt
- Research Department Synchrotron Radiation and Nanotechnology, Paul Scherrer Institut, Swiss Light Source, WSLA/123, 5232 Villigen PSI, Switzerland
| | - Frank M. F. de Groot
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, Utrecht 3584 CG, The Netherlands
| | - Jan-Erik Rubensson
- Department of Physics and Astronomy, Uppsala University, Box 516, Uppsala 751 20, Sweden
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128
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Kwon D, Nho HW, Yoon TH. X-ray and electron microscopy studies on the biodistribution and biomodification of iron oxide nanoparticles in Daphnia magna. Colloids Surf B Biointerfaces 2014; 122:384-389. [PMID: 25086306 DOI: 10.1016/j.colsurfb.2014.07.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 06/09/2014] [Accepted: 07/12/2014] [Indexed: 11/16/2022]
Abstract
Biodistribution and biomodification of iron oxide (Fe3O4 and α-Fe2O3) nanoparticles (NPs) in a well-known toxicity test organism, Daphnia magna (D. magna), were investigated using transmission electron microscopy (TEM) and scanning transmission X-ray microscopy (STXM). In addition to the morphological changes in the gut tissues of D. magna, biodistribution and biomodification of iron oxide NPs in the digestive tract of D. magna were also monitored in this study. Upon exposures to both iron oxide NPs, unique morphological changes (e.g., irregular shaped microvilli, epithelial cell protrusion, and dilatation of cytoplasmic inclusion) in the gut tissues of D. magna were observed along with bacterial colonization of the gut lumen. However, despite their heavy accumulations in the digesitive tract, TEM and STXM images confirmed us that both Fe3O4 and α-Fe2O3 NPs were not penetrating into the gut tissues of D. magna. Moreover, for the Fe3O4 NPs in direct contact with the gut microvilli of D. magna, slight but significant spectral changes were observed in their Fe L-edge X-ray absorption near edge structure (XANES) spectra, which indicated that there were biomodifications of Fe3O4 NPs, probably involving oxidative dissolution of Fe3O4 NPs followed by rapid precipitation of ferric oxide or hydroxide. However, no significant changes were observed in the Fe L-edge XANES spectra of the α-Fe2O3 NPs present in the gut lumen of D. magna. These X-ray and electron microscopic observations confirmed us that, despite similarities in core sizes and chemical compositions, NPs with different crystalline phase and dissolution rates can interact quite differently with their local environment, may result in different biodistribution and cause completely dissimilar toxicities.
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Affiliation(s)
- Dongwook Kwon
- Laboratory of Nanoscale Characterization & Environmental Chemistry, Department of Chemistry, College of Natural Sciences, Hanyang University, Seoul 133-791, Republic of Korea
| | - Hyun Woo Nho
- Laboratory of Nanoscale Characterization & Environmental Chemistry, Department of Chemistry, College of Natural Sciences, Hanyang University, Seoul 133-791, Republic of Korea
| | - Tae Hyun Yoon
- Laboratory of Nanoscale Characterization & Environmental Chemistry, Department of Chemistry, College of Natural Sciences, Hanyang University, Seoul 133-791, Republic of Korea.
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129
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Andrés J, Gracia L, Gonzalez-Navarrete P, Longo VM, Avansi W, Volanti DP, Ferrer MM, Lemos PS, La Porta FA, Hernandes AC, Longo E. Structural and electronic analysis of the atomic scale nucleation of Ag on α-Ag2WO4 induced by electron irradiation. Sci Rep 2014; 4:5391. [PMID: 24953210 PMCID: PMC4066248 DOI: 10.1038/srep05391] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Accepted: 05/30/2014] [Indexed: 11/09/2022] Open
Abstract
In this work, we utilise a combination of theory, computation and experiments to understand the early events related to the nucleation of Ag filaments on α-Ag2WO4 crystals, which is driven by an accelerated electron beam from an electron microscope under high vacuum. The growth process and the chemical composition and elemental distribution in these filaments were analysed in depth at the nanoscale level using TEM, HAADF, EDS and XPS; the structural and electronic aspects were systematically studied in using first-principles electronic structure theory within QTAIM framework. The Ag nucleation and formation on α-Ag2WO4 is a result of the order/disorder effects generated in the crystal by the electron-beam irradiation. Both experimental and theoretical results show that this behavior is associated with structural and electronic changes of the [AgO2] and [AgO4] clusters and, to a minor extent, to the [WO6] cluster; these clusters collectively represent the constituent building blocks of α-Ag2WO4.
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Affiliation(s)
- Juan Andrés
- Departament de Química Física i Analítica, UJI−Universitat Jaume I, Av. de Vicent Sos Baynat, s/n, Castelló de la Plana 12071, Spain
| | - Lourdes Gracia
- Departament de Química Física i Analítica, UJI−Universitat Jaume I, Av. de Vicent Sos Baynat, s/n, Castelló de la Plana 12071, Spain
- Instituto de Química, UNESP−Universidade Estadual Paulista, R. Francisco Degni, 55, Araraquara 14800-900, Brazil
| | - Patricio Gonzalez-Navarrete
- Departament de Química Física i Analítica, UJI−Universitat Jaume I, Av. de Vicent Sos Baynat, s/n, Castelló de la Plana 12071, Spain
- Instituto de Química, UNESP−Universidade Estadual Paulista, R. Francisco Degni, 55, Araraquara 14800-900, Brazil
| | - Valeria M. Longo
- Instituto de Física de São Carlos, USP−Universidade de São Paulo, Av. Trabalhador são-carlense, São Carlos 13560-970, Brazil
| | - Waldir Avansi
- Departamento de Física, UFSCar−Universidade Federal de São Carlos, Rod. Washington Luis, km 235, São Carlos 13565-905, Brazil
| | - Diogo P. Volanti
- Departamento de Química e Ciências Ambientais, UNESP−Universidade Estadual Paulista, R. Cristóvão Colombo, 2265, São José do Rio Preto 15054-000, Brazil
| | - Mateus M. Ferrer
- Departamento de Física, UFSCar−Universidade Federal de São Carlos, Rod. Washington Luis, km 235, São Carlos 13565-905, Brazil
| | - Pablo S. Lemos
- Departamento de Física, UFSCar−Universidade Federal de São Carlos, Rod. Washington Luis, km 235, São Carlos 13565-905, Brazil
| | - Felipe A. La Porta
- Instituto de Química, UNESP−Universidade Estadual Paulista, R. Francisco Degni, 55, Araraquara 14800-900, Brazil
| | - Antonio C. Hernandes
- Instituto de Física de São Carlos, USP−Universidade de São Paulo, Av. Trabalhador são-carlense, São Carlos 13560-970, Brazil
| | - Elson Longo
- Instituto de Química, UNESP−Universidade Estadual Paulista, R. Francisco Degni, 55, Araraquara 14800-900, Brazil
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130
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Mino L, Borfecchia E, Groppo C, Castelli D, Martinez-Criado G, Spiess R, Lamberti C. Iron oxidation state variations in zoned micro-crystals measured using micro-XANES. Catal Today 2014. [DOI: 10.1016/j.cattod.2013.11.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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131
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Distinct charge dynamics in battery electrodes revealed by in situ and operando soft X-ray spectroscopy. Nat Commun 2014; 4:2568. [PMID: 24100759 PMCID: PMC3806410 DOI: 10.1038/ncomms3568] [Citation(s) in RCA: 183] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 09/05/2013] [Indexed: 11/09/2022] Open
Abstract
Developing high-performance batteries relies on material breakthroughs. During the past few years, various in situ characterization tools have been developed and have become indispensible in studying and the eventual optimization of battery materials. However, soft X-ray spectroscopy, one of the most sensitive probes of electronic states, has been mainly limited to ex situ experiments for battery research. Here we achieve in situ and operando soft X-ray absorption spectroscopy of lithium-ion battery cathodes. Taking advantage of the elemental, chemical and surface sensitivities of soft X-rays, we discover distinct lithium-ion and electron dynamics in Li(Co(¹/₃)Ni(¹/₃)Mn(¹/₃))O₂ and LiFePO₄ cathodes in polymer electrolytes. The contrast between the two systems and the relaxation effect in LiFePO₄ is attributed to a phase transformation mechanism, and the mesoscale morphology and charge conductivity of the electrodes. These discoveries demonstrate feasibility and power of in situ soft X-ray spectroscopy for studying integrated and dynamic effects in batteries.
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132
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Jacques SDM, Di Michiel M, Kimber SAJ, Yang X, Cernik RJ, Beale AM, Billinge SJL. Pair distribution function computed tomography. Nat Commun 2014; 4:2536. [PMID: 24077398 DOI: 10.1038/ncomms3536] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Accepted: 09/03/2013] [Indexed: 11/09/2022] Open
Abstract
An emerging theme of modern composites and devices is the coupling of nanostructural properties of materials with their targeted arrangement at the microscale. Of the imaging techniques developed that provide insight into such designer materials and devices, those based on diffraction are particularly useful. However, to date, these have been heavily restrictive, providing information only on materials that exhibit high crystallographic ordering. Here we describe a method that uses a combination of X-ray atomic pair distribution function analysis and computed tomography to overcome this limitation. It allows the structure of nanocrystalline and amorphous materials to be identified, quantified and mapped. We demonstrate the method with a phantom object and subsequently apply it to resolving, in situ, the physicochemical states of a heterogeneous catalyst system. The method may have potential impact across a range of disciplines from materials science, biomaterials, geology, environmental science, palaeontology and cultural heritage to health.
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Affiliation(s)
- Simon D M Jacques
- 1] School of Materials, University of Manchester, Manchester M13 9PL, UK [2] Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell, Didcot, Oxfordshire, OX11 0QX, UK
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133
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Affiliation(s)
- Justin B. Sambur
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14850;
| | - Peng Chen
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14850;
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134
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Ishiguro N, Uruga T, Sekizawa O, Tsuji T, Suzuki M, Kawamura N, Mizumaki M, Nitta K, Yokoyama T, Tada M. Visualization of the Heterogeneity of Cerium Oxidation States in Single Pt/Ce2Zr2OxCatalyst Particles by Nano-XAFS. Chemphyschem 2014; 15:1563-8. [DOI: 10.1002/cphc.201400090] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Indexed: 11/06/2022]
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135
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Lu J, Yang L, Xu B, Wu Q, Zhang D, Yuan S, Zhai Y, Wang X, Fan Y, Hu Z. Promotion Effects of Nitrogen Doping into Carbon Nanotubes on Supported Iron Fischer–Tropsch Catalysts for Lower Olefins. ACS Catal 2014. [DOI: 10.1021/cs400931z] [Citation(s) in RCA: 185] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Jinzhao Lu
- Key
Laboratory of Mesoscopic Chemistry of the Ministry of Education and
Jiangsu Provincial Lab for Nanotechnology, Institute of Theoretical
and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Lijun Yang
- Key
Laboratory of Mesoscopic Chemistry of the Ministry of Education and
Jiangsu Provincial Lab for Nanotechnology, Institute of Theoretical
and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Bolian Xu
- Key
Laboratory of Mesoscopic Chemistry of the Ministry of Education and
Jiangsu Provincial Lab for Nanotechnology, Institute of Theoretical
and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Qiang Wu
- Key
Laboratory of Mesoscopic Chemistry of the Ministry of Education and
Jiangsu Provincial Lab for Nanotechnology, Institute of Theoretical
and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Dong Zhang
- Department
of Physics, Southeast University, Nanjing 210096, China
| | - Shijun Yuan
- Department
of Physics, Southeast University, Nanjing 210096, China
| | - Ya Zhai
- Department
of Physics, Southeast University, Nanjing 210096, China
| | - Xizhang Wang
- Key
Laboratory of Mesoscopic Chemistry of the Ministry of Education and
Jiangsu Provincial Lab for Nanotechnology, Institute of Theoretical
and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Yining Fan
- Key
Laboratory of Mesoscopic Chemistry of the Ministry of Education and
Jiangsu Provincial Lab for Nanotechnology, Institute of Theoretical
and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Zheng Hu
- Key
Laboratory of Mesoscopic Chemistry of the Ministry of Education and
Jiangsu Provincial Lab for Nanotechnology, Institute of Theoretical
and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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136
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Gao J, Zhong J, Bai L, Liu J, Zhao G, Sun X. Revealing the role of catalysts in carbon nanotubes and nanofibers by scanning transmission X-ray microscopy. Sci Rep 2014; 4:3606. [PMID: 24398972 PMCID: PMC3884223 DOI: 10.1038/srep03606] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Accepted: 12/10/2013] [Indexed: 12/17/2022] Open
Abstract
The identification of effective components on the atomic scale in carbon nanomaterials which improve the performance in various applications remains outstanding challenges. Here the catalyst residues in individual carbon nanotube (CNT) and carbon nanofiber (CNF) were clearly imaged with a concurrent characterization of their electronic structure by nanoscale scanning transmission X-ray microscopy. Except for prominent catalyst nanoparticle at the tip, tiny catalyst clusters along the tube (fiber) were detected, indicating a migration of the catalysts with the growth of CNTs (CNFs). The observation provides the direct evidence on the atomic metal in CNT for oxygen reduction reported in the literature. Interaction between catalysts (Fe, Ni) and CNTs (CNFs) at the tip was also identified by comparing the X-ray absorption spectra. A deep understanding of catalyst residues such as Fe or Ni in carbon nanomaterials is very vital to growth mechanism development and practical applications.
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Affiliation(s)
- Jing Gao
- Soochow University-Western University Centre for Synchrotron Radiation Research, Institute of Functional Nano and Soft Materials Laboratory (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science & Technology, Soochow University, Suzhou 215123, China
| | - Jun Zhong
- Soochow University-Western University Centre for Synchrotron Radiation Research, Institute of Functional Nano and Soft Materials Laboratory (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science & Technology, Soochow University, Suzhou 215123, China
| | - Lili Bai
- Soochow University-Western University Centre for Synchrotron Radiation Research, Institute of Functional Nano and Soft Materials Laboratory (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science & Technology, Soochow University, Suzhou 215123, China
| | - Jinyin Liu
- Soochow University-Western University Centre for Synchrotron Radiation Research, Institute of Functional Nano and Soft Materials Laboratory (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science & Technology, Soochow University, Suzhou 215123, China
| | - Guanqi Zhao
- Soochow University-Western University Centre for Synchrotron Radiation Research, Institute of Functional Nano and Soft Materials Laboratory (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science & Technology, Soochow University, Suzhou 215123, China
| | - Xuhui Sun
- Soochow University-Western University Centre for Synchrotron Radiation Research, Institute of Functional Nano and Soft Materials Laboratory (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science & Technology, Soochow University, Suzhou 215123, China
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137
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Chen P, Zhou X, Andoy NM, Han KS, Choudhary E, Zou N, Chen G, Shen H. Spatiotemporal catalytic dynamics within single nanocatalysts revealed by single-molecule microscopy. Chem Soc Rev 2014; 43:1107-17. [DOI: 10.1039/c3cs60215j] [Citation(s) in RCA: 113] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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138
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Abstract
Catalysts often perform miraculous transformations of reactants A to very different products P in seemingly a single step. Such catalysts appear as a black box. This tutorial shows how we can shine light into this black box and understand the reaction mechanism. In particular, it aims at explaining some of the fundamental principles of the action of a catalyst.
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Affiliation(s)
- Emil Roduner
- Institute of Physical Chemistry
- University of Stuttgart
- D-70569 Stuttgart, Germany
- Chemistry Department
- University of Pretoria
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139
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Jarenwattananon NN, Glöggler S, Otto T, Melkonian A, Morris W, Burt SR, Yaghi OM, Bouchard LS. Thermal maps of gases in heterogeneous reactions. Nature 2013; 502:537-40. [DOI: 10.1038/nature12568] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 07/23/2013] [Indexed: 11/09/2022]
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140
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Jacobs G, Ma W, Gao P, Todic B, Bhatelia T, Bukur DB, Davis BH. The application of synchrotron methods in characterizing iron and cobalt Fischer–Tropsch synthesis catalysts. Catal Today 2013. [DOI: 10.1016/j.cattod.2013.05.011] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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141
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Lundt N, Kelly ST, Rödel T, Remez B, Schwartzberg AM, Ceballos A, Baldasseroni C, Anastasi PAF, Cox M, Hellman F, Leone SR, Gilles MK. High spatial resolution Raman thermometry analysis of TiO2 microparticles. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:104906. [PMID: 24182150 DOI: 10.1063/1.4824355] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A new technique of high-resolution micro-Raman thermometry using anatase TiO2 microparticles (0.5-3 μm) is presented. These very high spatial resolution measurements (280 nm) reveal temperature gradients even within individual microparticles. Potential applications of this technique are demonstrated by probing the temperature distribution of a micro-fabricated heater consisting of a thin silicon nitride (Si-N) membrane with a gold coil on top of the membrane. Using TiO2 microparticle micro-Raman thermometry, the temperature from the outer edge of the coil to the inner portion was measured to increase by ~40 °C. These high spatial resolution microscopic measurements were also used to measure the temperature gradient within the 20 μm wide Si-N between the gold heating coils. 2D numerical simulations of the micro heater temperature distribution are in excellent agreement with the experimental measurements of the temperatures. These measurements illustrate the potential to extend applications of micro-Raman thermometry to obtain temperature details on a sub-micrometer spatial resolution by employing microparticles.
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Affiliation(s)
- Nils Lundt
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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142
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Andrews JC, Weckhuysen BM. Hard X-ray spectroscopic nano-imaging of hierarchical functional materials at work. Chemphyschem 2013; 14:3655-66. [PMID: 24038941 DOI: 10.1002/cphc.201300529] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Indexed: 11/11/2022]
Abstract
Heterogeneous catalysts often consist of an active metal (oxide) in close contact with a support material and various promoter elements. Although macroscopic properties, such as activity, selectivity and stability, can be assessed with catalyst performance testing, the development of relevant, preferably quantitative structure-performance relationships require the use of advanced characterisation methods. Spectroscopic imaging in the hard X-ray region with nanometer-scale resolution has very recently emerged as a powerful approach to elucidate the hierarchical structure and related chemistry of catalytic solids in action under realistic reaction conditions. This X-ray-based chemical imaging method benefits from the combination of high resolution (∼30 nm) with large X-ray penetration and depth of focus, and the possibility for probing large areas with mosaic imaging. These capabilities make it possible to obtain spatial and temporal information on chemical changes in catalytic solids as well as a wide variety of other functional materials, such as fuel cells and batteries, in their full complexity and integrity. In this concept article we provide details on the method and setup of full-field hard X-ray spectroscopic imaging, illustrate its potential for spatiotemporal chemical imaging by making use of recent showcases, outline the pros and cons of this experimental approach and discuss some future directions for hierarchical functional materials research.
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Affiliation(s)
- Joy C Andrews
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park CA 94025 (USA).
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143
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Zhang S, Nguyen L, Zhu Y, Zhan S, Tsung CK(F, Tao F(F. In-situ studies of nanocatalysis. Acc Chem Res 2013; 46:1731-9. [PMID: 23618394 DOI: 10.1021/ar300245g] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A heterogeneous catalyst in industry consists of nanoparticles with variable crystallite sizes, shapes, and compositions. Its catalytic performance (activity, selectivity, and durability) derives from surface chemistry of catalyst nanoparticles during catalysis. However, the surface chemistry of the catalyst particles during catalysis, termed in-situ information, is a "black box" because of the challenges in characterizing the catalysts during catalysis. The lack of such in-situ information about catalysts has limited the understanding of catalytic mechanisms and the development of catalysts with high selectivity and activity. The challenges in understanding heterogeneous catalysis include measurement of reaction kinetics, identification of reaction intermediates, bridging pressure gap and materials gap. The pressure gap is the difference in surface structure and chemistry between a catalyst during catalysis and under an ultrahigh vacuum (UHV) condition. The materials gap represents the difference between the structural and compositional complexity of industrial catalysts and the well-defined surface of model catalysts of metals or oxides. Development of in-situ characterization using electron spectroscopy and electron microscopy in recent decades has made possible studies of surface chemistry and structure of nanocatalysts under reaction conditions or during catalysis at near ambient pressure. In this Account, we review the new chemistries and structures of nanocatalysts during reactions revealed with in-situ analytical techniques. We discuss changes observed during catalysis including the evolution of composition, oxidation state, phase, and geometric structure of the catalyst surface, and the sintering of catalysts. These surface chemistries and structures have allowed researchers to build a correlation between surface chemistry and structure of active nanocatalysts and their corresponding catalytic performances. Such a correlation provides critical insights for understanding catalysis, optimization of existing nanocatalysts, and development of new nanocatalysts with high activity and selectivity.
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Affiliation(s)
- Shiran Zhang
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Luan Nguyen
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Yuan Zhu
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Sihui Zhan
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | | | - Franklin (Feng) Tao
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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144
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Torres Galvis HM, de Jong KP. Catalysts for Production of Lower Olefins from Synthesis Gas: A Review. ACS Catal 2013. [DOI: 10.1021/cs4003436] [Citation(s) in RCA: 654] [Impact Index Per Article: 59.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hirsa M. Torres Galvis
- Inorganic Chemistry and Catalysis,
Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Krijn P. de Jong
- Inorganic Chemistry and Catalysis,
Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
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145
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Kelly ST, Nigge P, Prakash S, Laskin A, Wang B, Tyliszczak T, Leone SR, Gilles MK. An environmental sample chamber for reliable scanning transmission x-ray microscopy measurements under water vapor. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:073708. [PMID: 23902077 DOI: 10.1063/1.4816649] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We have designed, fabricated, and tested a compact gas-phase reactor for performing in situ soft x-ray scanning transmission x-ray microscopy (STXM) measurements. The reactor mounts directly to the existing sample holder used in the majority of STXM instruments around the world and installs with minimal instrument reconfiguration. The reactor accommodates many gas atmospheres, but was designed specifically to address the needs of measurements under water vapor. An on-board sensor measures the relative humidity and temperature inside the reactor, minimizing uncertainties associated with measuring these quantities outside the instrument. The reactor reduces x-ray absorption from the process gas by over 85% compared to analogous experiments with the entire STXM instrument filled with process gas. Reduced absorption by the process gas allows data collection at full instrumental resolution, minimizes radiation dose to the sample, and results in much more stable imaging conditions. The reactor is in use at the STXM instruments at beamlines 11.0.2 and 5.3.2.2 at the Advanced Light Source.
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Affiliation(s)
- Stephen T Kelly
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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146
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Boesenberg U, Meirer F, Liu Y, Shukla AK, Dell’Anna R, Tyliszczak T, Chen G, Andrews JC, Richardson TJ, Kostecki R, Cabana J. Mesoscale phase distribution in single particles of LiFePO 4 following lithium deintercalation. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2013; 25:1664-1672. [PMID: 23745016 PMCID: PMC3670807 DOI: 10.1021/cm400106k] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The chemical phase distribution in hydrothermally grown micrometric single crystals LiFePO4 following partial chemical delithiation was investigated. Full field and scanning X-ray microscopy were combined with X-ray absorption spectroscopy at the Fe K- and O K-edges, respectively, to produce maps with high chemical and spatial resolution. The resulting information was compared to morphological insight into the mechanics of the transformation by scanning transmission electron microscopy. This study revealed the interplay at the mesocale between microstructure and phase distribution during the redox process, as morphological defects were found to kinetically determine the progress of the reaction. Lithium deintercalation was also found to induce severe mechanical damage in the crystals, presumably due to the lattice mismatch between LiFePO4 and FePO4. Our results lead to the conclusion that rational design of intercalation-based electrode materials, such as LiFePO4, with optimized utilization and life requires the tailoring of particles that minimize kinetic barriers and mechanical strain. Coupling TXM-XANES with TEM can provide unique insight into the behavior of electrode materials during operation, at scales spanning from nanoparticles to ensembles and complex architectures.
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Affiliation(s)
- Ulrike Boesenberg
- Environmental Energy Technologies Division, Lawrence Berkeley National
Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720
| | - Florian Meirer
- Fondazione Bruno Kessler, Center for Materials and Microsystems, Via
Sommarive 18, I-38050 Povo, Trento, Italy
| | - Yijin Liu
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator
Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025 (USA)
| | - Alpesh K. Shukla
- Environmental Energy Technologies Division, Lawrence Berkeley National
Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720
| | - Rossana Dell’Anna
- Fondazione Bruno Kessler, Center for Materials and Microsystems, Via
Sommarive 18, I-38050 Povo, Trento, Italy
| | - Tolek Tyliszczak
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley,
California 94720, 20036, USA
| | - Guoying Chen
- Environmental Energy Technologies Division, Lawrence Berkeley National
Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720
| | - Joy C. Andrews
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator
Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025 (USA)
| | - Thomas J. Richardson
- Environmental Energy Technologies Division, Lawrence Berkeley National
Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720
| | - Robert Kostecki
- Environmental Energy Technologies Division, Lawrence Berkeley National
Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720
| | - Jordi Cabana
- Environmental Energy Technologies Division, Lawrence Berkeley National
Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720
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147
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Tamenori Y. Electron yield soft X-ray photoabsorption spectroscopy under normal ambient-pressure conditions. JOURNAL OF SYNCHROTRON RADIATION 2013; 20:419-25. [PMID: 23592620 PMCID: PMC4034694 DOI: 10.1107/s0909049513003592] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Accepted: 02/05/2013] [Indexed: 05/23/2023]
Abstract
Ambient-pressure soft X-ray photoabsorption spectroscopy (XAS) was demonstrated to be applicable to the chemical analysis of hydrated transition-metal compounds. For this purpose, even under ambient-pressure conditions, electron yield detection XAS (EY-XAS), based on a simple drain-current set-up, was used to overcome a weakness in fluorescence yield detection XAS (FY-XAS), which does not give a pure soft XAS. The feasibility of EY-XAS was investigated and it was clarified that the EY-XAS under ambient-pressure conditions corresponds to the mixed data of the total EY and conversion EY spectra. Normal ambient-pressure EY-XAS analysis was applied to anhydrous (CoCl2) and to hydrated (CoCl2·6H2O) cobalt chloride at the Co L23-edge. The present measurements demonstrated the ability to unambiguously distinguish the different chemical states of cobalt ions, relying upon spectral differences that indicate octahedral/quasi-octahedral structural changes as a result of hydration/dehydration reactions.
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Affiliation(s)
- Yusuke Tamenori
- Japan Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan
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148
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Hamilton NG, Silverwood IP, Warringham R, Kapitán J, Hecht L, Webb PB, Tooze RP, Parker SF, Lennon D. Vibrational Analysis of an Industrial Fe-Based Fischer-Tropsch Catalyst Employing Inelastic Neutron Scattering. Angew Chem Int Ed Engl 2013; 52:5608-11. [DOI: 10.1002/anie.201210179] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 03/19/2013] [Indexed: 11/11/2022]
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149
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Hamilton NG, Silverwood IP, Warringham R, Kapitán J, Hecht L, Webb PB, Tooze RP, Parker SF, Lennon D. Vibrational Analysis of an Industrial Fe-Based Fischer-Tropsch Catalyst Employing Inelastic Neutron Scattering. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201210179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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150
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Tao FF, Nguyen L, Zhang S. Design of a new reactor-like high temperature near ambient pressure scanning tunneling microscope for catalysis studies. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:034101. [PMID: 23556828 DOI: 10.1063/1.4792673] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Here, we present the design of a new reactor-like high-temperature near ambient pressure scanning tunneling microscope (HT-NAP-STM) for catalysis studies. This HT-NAP-STM was designed for exploration of structures of catalyst surfaces at atomic scale during catalysis or under reaction conditions. In this HT-NAP-STM, the minimized reactor with a volume of reactant gases of ∼10 ml is thermally isolated from the STM room through a shielding dome installed between the reactor and STM room. An aperture on the dome was made to allow tip to approach to or retract from a catalyst surface in the reactor. This dome minimizes thermal diffusion from hot gas of the reactor to the STM room and thus remains STM head at a constant temperature near to room temperature, allowing observation of surface structures at atomic scale under reaction conditions or during catalysis with minimized thermal drift. The integrated quadrupole mass spectrometer can simultaneously measure products during visualization of surface structure of a catalyst. This synergy allows building an intrinsic correlation between surface structure and its catalytic performance. This correlation offers important insights for understanding of catalysis. Tests were done on graphite in ambient environment, Pt(111) in CO, graphene on Ru(0001) in UHV at high temperature and gaseous environment at high temperature. Atom-resolved surface structure of graphene on Ru(0001) at 500 K in a gaseous environment of 25 Torr was identified.
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Affiliation(s)
- Franklin Feng Tao
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA.
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