1
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Zhu B, Huang W, Lin H, Feng H, Palotás K, Lv J, Ren Y, Ouyang R, Yang F. Vacancy Ordering in Ultrathin Copper Oxide Films on Cu(111). J Am Chem Soc 2024; 146:15887-15896. [PMID: 38825776 DOI: 10.1021/jacs.4c02424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
Oxide thin films grown on metal surfaces have wide applications in catalysis and beyond owing to their unique surface structures compared to their bulk counterparts. Despite extensive studies, the atomic structures of copper surface oxides on Cu(111), commonly referred to as "44" and "29", have remained elusive. In this work, we demonstrated an approach for the structural determination of oxide surfaces using element-specific scanning tunneling microscopy (STM) imaging enhanced by functionalized tips. This approach enabled us to resolve the atomic structures of "44" and "29" surface oxides, which were further corroborated by noncontact atomic force microscopy (nc-AFM) measurements and Monte Carlo (MC) simulations. The stoichiometry of the "44" and "29" frameworks was identified as Cu23O16 and Cu16O11, respectively. Contrary to the conventional hypothesis, we observed ordered Cu vacancies within the "44" structure manifesting as peanut-shaped cavities in the hexagonal lattice. Similarly, a combination of Cu and O vacancies within the "29" structure leads to bean-shaped cavities within the pentagonal lattice. Our study has thus resolved the decades-long controversy on the atomic structures of "44" and "29" surface oxides, advancing our understanding of copper oxidation processes and introducing a robust framework for the analysis of complex oxide surfaces.
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Affiliation(s)
- Bowen Zhu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Wugen Huang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Haiping Lin
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China
| | - Hao Feng
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | | | - Jiayu Lv
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Yihui Ren
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Runhai Ouyang
- Materials Genome Institute, Shanghai University, Shanghai 200444, China
| | - Fan Yang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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2
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Noordhoek K, Bartel CJ. Accelerating the prediction of inorganic surfaces with machine learning interatomic potentials. NANOSCALE 2024. [PMID: 38470833 DOI: 10.1039/d3nr06468a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
The surface properties of solid-state materials often dictate their functionality, especially for applications where nanoscale effects become important. The relevant surface(s) and their properties are determined, in large part, by the material's synthesis or operating conditions. These conditions dictate thermodynamic driving forces and kinetic rates responsible for yielding the observed surface structure and morphology. Computational surface science methods have long been applied to connect thermochemical conditions to surface phase stability, particularly in the heterogeneous catalysis and thin film growth communities. This review provides a brief introduction to first-principles approaches to compute surface phase diagrams before introducing emerging data-driven approaches. The remainder of the review focuses on the application of machine learning, predominantly in the form of learned interatomic potentials, to study complex surfaces. As machine learning algorithms and large datasets on which to train them become more commonplace in materials science, computational methods are poised to become even more predictive and powerful for modeling the complexities of inorganic surfaces at the nanoscale.
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Affiliation(s)
- Kyle Noordhoek
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, 55455, USA.
| | - Christopher J Bartel
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, 55455, USA.
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3
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da Silva Alvim R, Borges I, Alves RMB, Capaz RB, Leitão AA. CO adsorption on MgO thin-films: formation and interaction of surface charged defects. Phys Chem Chem Phys 2023; 25:28982-28997. [PMID: 37859503 DOI: 10.1039/d3cp03320a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
Two-dimensional (2D) materials formed by thin-films of metal oxides that grow on metal supports are commonly used in heterogeneous catalysis and multilayer electronic devices. Despite extensive research on these systems, the effects of charged defects at supported oxides on surface processes are still not clear. In this work, we perform spin-polarized density-functional theory (DFT) calculations to investigate formation and interaction of charged magnesium and oxygen vacancies, and Al dopants on MgO(001)/Ag(001) surface. The results show a sizable interface compressive effect that decreases the metal work function as electrons are added on the MgO surface with a magnesium vacancy. This surface displays a larger formation energy in a water environment (O-rich condition) even with additional Al-doping. Under these conditions, we found that a polar molecule such as CO is more strongly adsorbed on the low-coordination oxygen sites due to a larger contribution of the channeled electronic transport with the silver interface regardless of the surface charge. Therefore, these findings elucidate how surface intrinsic vacancies can influence or contribute to charge transfer, which allows one to explore more specific reactions at different surface topologies for more efficient catalysts for CO2 conversion.
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Affiliation(s)
- Raphael da Silva Alvim
- Departamento de Engenharia Química, Escola Politécnica, Universidade de São Paulo (USP), São Paulo, SP, 05508-900, Brazil.
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora (UFJF), Juiz de Fora, MG, 36036-330, Brazil
| | - Itamar Borges
- Departamento de Química, Instituto Militar de Engenharia (IME), Rio de Janeiro, RJ, 22290-270, Brazil
| | - Rita Maria Brito Alves
- Departamento de Engenharia Química, Escola Politécnica, Universidade de São Paulo (USP), São Paulo, SP, 05508-900, Brazil.
| | - Rodrigo B Capaz
- Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-972, Brazil
- Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, SP, 13083-100, Brazil
| | - Alexandre Amaral Leitão
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora (UFJF), Juiz de Fora, MG, 36036-330, Brazil
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4
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Lee SW, Luna ML, Berdunov N, Wan W, Kunze S, Shaikhutdinov S, Cuenya BR. Unraveling surface structures of gallium promoted transition metal catalysts in CO 2 hydrogenation. Nat Commun 2023; 14:4649. [PMID: 37532720 PMCID: PMC10397205 DOI: 10.1038/s41467-023-40361-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 07/20/2023] [Indexed: 08/04/2023] Open
Abstract
Gallium-containing alloys have recently been reported to hydrogenate CO2 to methanol at ambient pressures. However, a full understanding of the Ga-promoted catalysts is still missing due to the lack of information about the surface structures formed under reaction conditions. Here, we employed near ambient pressure scanning tunneling microscopy and x-ray photoelectron spectroscopy to monitor the evolution of well-defined Cu-Ga surfaces during CO2 hydrogenation. We show the formation of two-dimensional Ga(III) oxide islands embedded into the Cu surface in the reaction atmosphere. The islands are a few atomic layers in thickness and considerably differ from bulk Ga2O3 polymorphs. Such a complex structure, which could not be determined with conventional characterization methods on powder catalysts, should be used for elucidating the reaction mechanism on the Ga-promoted metal catalysts.
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Affiliation(s)
- Si Woo Lee
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195, Berlin, Germany
| | - Mauricio Lopez Luna
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195, Berlin, Germany
| | - Nikolay Berdunov
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195, Berlin, Germany
| | - Weiming Wan
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195, Berlin, Germany
| | - Sebastian Kunze
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195, Berlin, Germany
| | - Shamil Shaikhutdinov
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195, Berlin, Germany.
| | - Beatriz Roldan Cuenya
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195, Berlin, Germany
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5
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Yin H, de Groot JG, Brune H. Highly Ordered and Thermally Stable FeRh Cluster Superlattice on Graphene for Low-Temperature Catalytic CO Oxidation. Chemphyschem 2023; 24:e202200648. [PMID: 36380531 DOI: 10.1002/cphc.202200648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 11/13/2022] [Accepted: 11/14/2022] [Indexed: 11/18/2022]
Abstract
We report on bimetallic FeRh clusters with a narrow size-distribution grown on graphene on Ir(111) as a carbon-supported model catalyst to promote low-temperature catalytic CO oxidation. By combining scanning tunneling microscopy with catalytic performance measurements, we reveal that Fe-Rh interfaces are active sites for oxygen activation and CO oxidation, especially at low temperatures. Rh core Fe shell clusters not only provide the active sites for the reaction, but also thermally stabilize surface Fe atoms towards coarsening compared with pure Fe clusters. Alternate isotope-labelled CO/O2 pulse experiments show opposite trends on preferential oxidation (PROX) performance because of surface hydroxyl species formation and competitive adsorption between CO and O2 . The present results introduce a general strategy to stabilize metallic clusters and to reveal the reaction mechanisms on bimetallic structures for low-temperature catalytic CO oxidation as well as preferential oxidation.
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Affiliation(s)
- Hao Yin
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Jean-Guillaume de Groot
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Harald Brune
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
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6
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Foppa L, Rüther F, Geske M, Koch G, Girgsdies F, Kube P, Carey SJ, Hävecker M, Timpe O, Tarasov AV, Scheffler M, Rosowski F, Schlögl R, Trunschke A. Data-Centric Heterogeneous Catalysis: Identifying Rules and Materials Genes of Alkane Selective Oxidation. J Am Chem Soc 2023; 145:3427-3442. [PMID: 36745555 PMCID: PMC9936587 DOI: 10.1021/jacs.2c11117] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Artificial intelligence (AI) can accelerate catalyst design by identifying key physicochemical descriptive parameters correlated with the underlying processes triggering, favoring, or hindering the performance. In analogy to genes in biology, these parameters might be called "materials genes" of heterogeneous catalysis. However, widely used AI methods require big data, and only the smallest part of the available data meets the quality requirement for data-efficient AI. Here, we use rigorous experimental procedures, designed to consistently take into account the kinetics of the catalyst active states formation, to measure 55 physicochemical parameters as well as the reactivity of 12 catalysts toward ethane, propane, and n-butane oxidation reactions. These materials are based on vanadium or manganese redox-active elements and present diverse phase compositions, crystallinities, and catalytic behaviors. By applying the sure-independence-screening-and-sparsifying-operator symbolic-regression approach to the consistent data set, we identify nonlinear property-function relationships depending on several key parameters and reflecting the intricate interplay of processes that govern the formation of olefins and oxygenates: local transport, site isolation, surface redox activity, adsorption, and the material dynamical restructuring under reaction conditions. These processes are captured by parameters derived from N2 adsorption, X-ray photoelectron spectroscopy (XPS), and near-ambient-pressure in situ XPS. The data-centric approach indicates the most relevant characterization techniques to be used for catalyst design and provides "rules" on how the catalyst properties may be tuned in order to achieve the desired performance.
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Affiliation(s)
- Lucas Foppa
- The
NOMAD Laboratory at the Fritz-Haber-Institut of the Max-Planck-Gesellschaft
and IRIS-Adlershof of the Humboldt-Universität zu Berlin, Faradayweg 4-6, D-14195 Berlin, Germany,
| | - Frederik Rüther
- BasCat
- UniCat BASF JointLab, Hardenbergstraße 36, D-10623 Berlin, Germany
| | - Michael Geske
- BasCat
- UniCat BASF JointLab, Hardenbergstraße 36, D-10623 Berlin, Germany
| | - Gregor Koch
- Department
of Inorganic Chemistry, Fritz-Haber-Institut
of the Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Frank Girgsdies
- Department
of Inorganic Chemistry, Fritz-Haber-Institut
of the Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Pierre Kube
- Department
of Inorganic Chemistry, Fritz-Haber-Institut
of the Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Spencer J. Carey
- Department
of Inorganic Chemistry, Fritz-Haber-Institut
of the Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Michael Hävecker
- Department
of Inorganic Chemistry, Fritz-Haber-Institut
of the Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany,Max
Planck Institute for Chemical Energy Conversion, 45470 Mülheim, Germany
| | - Olaf Timpe
- Department
of Inorganic Chemistry, Fritz-Haber-Institut
of the Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Andrey V. Tarasov
- Department
of Inorganic Chemistry, Fritz-Haber-Institut
of the Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Matthias Scheffler
- The
NOMAD Laboratory at the Fritz-Haber-Institut of the Max-Planck-Gesellschaft
and IRIS-Adlershof of the Humboldt-Universität zu Berlin, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Frank Rosowski
- BasCat
- UniCat BASF JointLab, Hardenbergstraße 36, D-10623 Berlin, Germany,BASF
SE, Catalysis Research, Carl-Bosch-Straße 38, D-67065 Ludwigshafen, Germany
| | - Robert Schlögl
- Department
of Inorganic Chemistry, Fritz-Haber-Institut
of the Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Annette Trunschke
- Department
of Inorganic Chemistry, Fritz-Haber-Institut
of the Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany,
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7
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Abstract
Two-dimensional (2D) ultrathin silica films have the potential to reach technological importance in electronics and catalysis. Several well-defined 2D-silica structures have been synthesized so far. The silica bilayer represents a 2D material with SiO2 stoichiometry. It consists of precisely two layers of tetrahedral [SiO4] building blocks, corner connected via oxygen bridges, thus forming a self-saturated silicon dioxide sheet with a thickness of ∼0.5 nm. Inspired by recent successful preparations and characterizations of these 2D-silica model systems, scientists now can forge novel concepts for realistic systems, particularly by atomic-scale studies with the most powerful and advanced surface science techniques and density functional theory calculations. This Review provides a solid introduction to these recent developments, breakthroughs, and implications on ultrathin 2D-silica films, including their atomic/electronic structures, chemical modifications, atom/molecule adsorptions, and catalytic reactivity properties, which can help to stimulate further investigations and understandings of these fundamentally important 2D materials.
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Affiliation(s)
- Jian-Qiang Zhong
- School of Physics, Hangzhou Normal University, No. 2318, Yuhangtang Road, Hangzhou, 311121 Zhejiang, China
| | - Hans-Joachim Freund
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
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8
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Grinter DC, Thornton G. Structure and reactivity of model CeO 2surfaces. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:253001. [PMID: 35287117 DOI: 10.1088/1361-648x/ac5d89] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 03/14/2022] [Indexed: 06/14/2023]
Abstract
As a key component in many industrial heterogeneous catalysts, the surface structure and reactivity of ceria, CeO2, has attracted a lot of attention. In this topical review we discuss some of the approaches taken to form a deeper understanding of the surface physics and chemistry of this important and interesting material. In particular, we focus on the preparation of ultrathin ceria films, nanostructures and supported metal nanoparticles. Cutting-edge microscopic and spectroscopic experimental techniques are highlighted which can probe the behaviour of oxygen species and atomic defects on these model surfaces.
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Affiliation(s)
- David C Grinter
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom
| | - Geoff Thornton
- Department of Chemistry and London Centre for Nanotechnology, University College London, London WC1H 0AJ, United Kingdom
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9
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Cano I, Weilhard A, Martin C, Pinto J, Lodge RW, Santos AR, Rance GA, Åhlgren EH, Jónsson E, Yuan J, Li ZY, Licence P, Khlobystov AN, Alves Fernandes J. Blurring the boundary between homogenous and heterogeneous catalysis using palladium nanoclusters with dynamic surfaces. Nat Commun 2021; 12:4965. [PMID: 34404801 PMCID: PMC8371125 DOI: 10.1038/s41467-021-25263-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 07/29/2021] [Indexed: 11/26/2022] Open
Abstract
Using a magnetron sputtering approach that allows size-controlled formation of nanoclusters, we have created palladium nanoclusters that combine the features of both heterogeneous and homogeneous catalysts. Here we report the atomic structures and electronic environments of a series of metal nanoclusters in ionic liquids at different stages of formation, leading to the discovery of Pd nanoclusters with a core of ca. 2 nm surrounded by a diffuse dynamic shell of atoms in [C4C1Im][NTf2]. Comparison of the catalytic activity of Pd nanoclusters in alkene cyclopropanation reveals that the atomically dynamic surface is critically important, increasing the activity by a factor of ca. 2 when compared to compact nanoclusters of similar size. Catalyst poisoning tests using mercury and dibenzo[a,e]cyclooctene show that dynamic Pd nanoclusters maintain their catalytic activity, which demonstrate their combined features of homogeneous and heterogeneous catalysts within the same material. Additionally, kinetic studies of cyclopropanation of alkenes mediated by the dynamic Pd nanoclusters reveal an observed catalyst order of 1, underpinning the pseudo-homogeneous character of the dynamic Pd nanoclusters. Establishing a structure-property relationship for nanoclusters and the link with their catalytic performance remain challenging. Here the authors show palladium nanocluster with a core of 2 nm surrounded by a diffuse dynamic shell of Pd atoms exhibit features of heterogeneous and homogenous catalyst at the same time.
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Affiliation(s)
- Israel Cano
- School of Chemistry, University of Nottingham, Nottingham, UK
| | | | - Carmen Martin
- School of Chemistry, University of Nottingham, Nottingham, UK
| | - Jose Pinto
- School of Chemistry, University of Nottingham, Nottingham, UK.,GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Nottingham, UK
| | - Rhys W Lodge
- School of Chemistry, University of Nottingham, Nottingham, UK
| | - Ana R Santos
- GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Nottingham, UK
| | - Graham A Rance
- School of Chemistry, University of Nottingham, Nottingham, UK.,Nanoscale and Microscale Research Centre, University of Nottingham, Nottingham, UK
| | | | - Erlendur Jónsson
- Department of Chemistry, University of Cambridge, Cambridge, UK.,Department of Physics, Chalmers University of Technology, Gothenburg, Sweden
| | - Jun Yuan
- Department of Physics, University of York, York, UK
| | - Ziyou Y Li
- Nanoscale Physics Research Laboratory, School of Physics and Astronomy, University of Birmingham, Birmingham, UK
| | - Peter Licence
- GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Nottingham, UK
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10
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Prieto MJ, Mullan T, Schlutow M, Gottlob DM, Tănase LC, Menzel D, Sauer J, Usvyat D, Schmidt T, Freund HJ. Insights into Reaction Kinetics in Confined Space: Real Time Observation of Water Formation under a Silica Cover. J Am Chem Soc 2021; 143:8780-8790. [PMID: 34096299 PMCID: PMC8297729 DOI: 10.1021/jacs.1c03197] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
We offer a comprehensive
approach to determine how physical confinement
can affect the water formation reaction. By using free-standing crystalline
SiO2 bilayer supported on Ru(0001) as a model system, we
studied the water formation reaction under confinement in situ and
in real time. Low-energy electron microscopy reveals that the reaction
proceeds via the formation of reaction fronts propagating across the
Ru(0001) surface. The Arrhenius analyses of the front velocity yield
apparent activation energies (Eaapp) of 0.32 eV for the confined
and 0.59 eV for the nonconfined reaction. DFT simulations indicate
that the rate-determining step remains unchanged upon confinement,
therefore ruling out the widely accepted transition state effect.
Additionally, H2O accumulation cannot explain the change
in Eaapp for the confined cases studied because its concentration
remains low. Instead, numerical simulations of the proposed kinetic
model suggest that the H2 adsorption process plays a decisive
role in reproducing the Arrhenius plots.
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Affiliation(s)
- Mauricio J Prieto
- Fritz-Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - Thomas Mullan
- Institut für Chemie, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany
| | - Mark Schlutow
- Institut für Mathematik, Freie Universität Berlin, Arnimallee 6, 14195 Berlin, Germany
| | - Daniel M Gottlob
- Fritz-Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - Liviu C Tănase
- Fritz-Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - Dietrich Menzel
- Fritz-Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195 Berlin, Germany.,Physik-Department E20, Technical University München, James-Franck-Str.1, 85748 Garching, Germany
| | - Joachim Sauer
- Institut für Chemie, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany
| | - Denis Usvyat
- Institut für Chemie, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany
| | - Thomas Schmidt
- Fritz-Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - Hans-Joachim Freund
- Fritz-Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
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11
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Wang Y, Wemhoff PI, Lewandowski M, Nilius N. Electron stimulated desorption of vanadyl-groups from vanadium oxide thin films on Ru(0001) probed with STM. Phys Chem Chem Phys 2021; 23:8439-8445. [PMID: 33876007 DOI: 10.1039/d0cp06419j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Low-temperature scanning tunnelling microscopy (STM) is employed to study electron-stimulated desorption of vanadyl groups from an ultrathin vanadium oxide film. The vanadia patches are prepared by reactive vapour deposition of V onto a Ru(0001) surface and comprise a highly ordered network of six and twelve membered V-O rings, some of them terminated by upright V[double bond, length as m-dash]O groups. The vanadyl units can be desorbed via electron injection from the STM tip in a reliable fashion. From hundreds of individual experiments, desorption rates are determined as a function of bias voltage and tunnelling current. Data analysis reveals a distinct threshold behaviour with bias onsets at +3.3 V and -2.6 V for positive and negative polarity, respectively. The desorption rate varies quadratically (cubically) with the tunnelling current at positive (negative) sample bias, indicating that V[double bond, length as m-dash]O desorption is a many-electron process. Based on our findings, a mechanism for desorption is proposed that includes resonant tunnelling into anti-bonding or out of bonding orbitals, followed by vibrational ladder climbing in the binding potential of the V[double bond, length as m-dash]O ad-system. The underlying electronic states can be identified directly in the STM conductance spectra taken on the oxide surface.
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Affiliation(s)
- Ying Wang
- Carl von Ossietzky Universität Oldenburg, Institut für Physik, D-26111 Oldenburg, Germany.
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12
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Ament K, Köwitsch N, Hou D, Götsch T, Kröhnert J, Heard CJ, Trunschke A, Lunkenbein T, Armbrüster M, Breu J. Nanoparticles Supported on Sub-Nanometer Oxide Films: Scaling Model Systems to Bulk Materials. Angew Chem Int Ed Engl 2021; 60:5890-5897. [PMID: 33289925 PMCID: PMC7986867 DOI: 10.1002/anie.202015138] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Indexed: 11/07/2022]
Abstract
Ultrathin layers of oxides deposited on atomically flat metal surfaces have been shown to significantly influence the electronic structure of the underlying metal, which in turn alters the catalytic performance. Upscaling of the specifically designed architectures as required for technical utilization of the effect has yet not been achieved. Here, we apply liquid crystalline phases of fluorohectorite nanosheets to fabricate such architectures in bulk. Synthetic sodium fluorohectorite, a layered silicate, when immersed into water spontaneously and repulsively swells to produce nematic suspensions of individual negatively charged nanosheets separated to more than 60 nm, while retaining parallel orientation. Into these galleries oppositely charged palladium nanoparticles were intercalated whereupon the galleries collapse. Individual and separated Pd nanoparticles were thus captured and sandwiched between nanosheets. As suggested by the model systems, the resulting catalyst performed better in the oxidation of carbon monoxide than the same Pd nanoparticles supported on external surfaces of hectorite or on a conventional Al2 O3 support. XPS confirmed a shift of Pd 3d electrons to higher energies upon coverage of Pd nanoparticles with nanosheets to which we attribute the improved catalytic performance. DFT calculations showed increasing positive charge on Pd weakened CO adsorption and this way damped CO poisoning.
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Affiliation(s)
- Kevin Ament
- Bavarian Polymer Institute and Department of ChemistryUniversity of BayreuthUniversitätsstraße 3095447BayreuthGermany
| | - Nicolas Köwitsch
- Faculty of Natural SciencesInstitute of ChemistryMaterials for Innovative Energy ConceptsChemnitz University of TechnologyStraße der Nationen 6209111ChemnitzGermany
| | - Dianwei Hou
- Department of Physical and Macromolecular ChemistryCharles UniversityHlavova 8128 00Prague 2Czech Republic
| | - Thomas Götsch
- Department of Inorganic ChemistryFritz-Haber-Institut der Max-Planck-GesellschaftFaradayweg 4–614195BerlinGermany
| | - Jutta Kröhnert
- Department of Inorganic ChemistryFritz-Haber-Institut der Max-Planck-GesellschaftFaradayweg 4–614195BerlinGermany
| | - Christopher J. Heard
- Department of Physical and Macromolecular ChemistryCharles UniversityHlavova 8128 00Prague 2Czech Republic
| | - Annette Trunschke
- Department of Inorganic ChemistryFritz-Haber-Institut der Max-Planck-GesellschaftFaradayweg 4–614195BerlinGermany
| | - Thomas Lunkenbein
- Department of Inorganic ChemistryFritz-Haber-Institut der Max-Planck-GesellschaftFaradayweg 4–614195BerlinGermany
| | - Marc Armbrüster
- Faculty of Natural SciencesInstitute of ChemistryMaterials for Innovative Energy ConceptsChemnitz University of TechnologyStraße der Nationen 6209111ChemnitzGermany
| | - Josef Breu
- Bavarian Polymer Institute and Department of ChemistryUniversity of BayreuthUniversitätsstraße 3095447BayreuthGermany
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Ament K, Köwitsch N, Hou D, Götsch T, Kröhnert J, Heard CJ, Trunschke A, Lunkenbein T, Armbrüster M, Breu J. Nanopartikel auf subnanometer dünnen oxidischen Filmen: Skalierung von Modellsystemen. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 133:5954-5961. [PMID: 38505494 PMCID: PMC10946923 DOI: 10.1002/ange.202015138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Indexed: 03/21/2024]
Abstract
AbstractDurch die Abscheidung von ultradünnen Oxidschichten auf atomar‐flachen Metalloberflächen konnte die elektronische Struktur des Metalls und hierdurch dessen katalytische Aktivität beeinflusst werden. Die Skalierung dieser Architekturen für eine technische Nutzbarkeit war bisher aber kaum möglich. Durch die Verwendung einer flüssigkristallinen Phase aus Fluorhectorit‐Nanoschichten, können wir solche Architekturen in skalierbarem Maßstab imitieren. Synthetischer Natriumfluorhectorit (NaHec) quillt spontan und repulsiv in Wasser zu einer nematischen flüssigkristallinen Phase aus individuellen Nanoschichten. Diese tragen eine permanente negative Schichtladung, sodass selbst bei einer Separation von über 60 nm eine parallele Anordnung der Schichten behalten wird. Zwischen diesen Nanoschichten können Palladium‐Nanopartikel mit entgegengesetzter Ladung eingelagert werden, wodurch die nematische Phase kollabiert und separierte Nanopartikel zwischen den Schichten fixiert werden. Die Aktivität zur CO‐Oxidation des so entstandenen Katalysators war höher als z. B. die der gleichen Nanopartikel auf konventionellem Al2O3 oder der externen Oberfläche von NaHec. Durch Röntgenphotoelektronenspektroskopie konnte eine Verschiebung der Pd‐3d‐Elektronen zu höheren Bindungsenergien beobachtet werden, womit die erhöhte Aktivität erklärt werden kann. Berechnungen zeigten, dass mit erhöhter positiver Ladung des Pd die Adsorptionsstärke von CO erniedrigt und damit auch die Vergiftung durch CO vermindert wird.
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Affiliation(s)
- Kevin Ament
- Bavarian Polymer Institute and Department of ChemistryUniversity of BayreuthUniversitätsstraße 3095447BayreuthDeutschland
| | - Nicolas Köwitsch
- Faculty of Natural SciencesInstitute of ChemistryMaterials for Innovative Energy ConceptsChemnitz University of TechnologyStraße der Nationen 6209111ChemnitzDeutschland
| | - Dianwei Hou
- Department of Physical and Macromolecular ChemistryCharles UniversityHlavova 8128 00Prague 2Czech Republic
| | - Thomas Götsch
- Department of Inorganic ChemistryFritz-Haber-Institut der Max-Planck-GesellschaftFaradayweg 4–614195BerlinDeutschland
| | - Jutta Kröhnert
- Department of Inorganic ChemistryFritz-Haber-Institut der Max-Planck-GesellschaftFaradayweg 4–614195BerlinDeutschland
| | - Christopher J. Heard
- Department of Physical and Macromolecular ChemistryCharles UniversityHlavova 8128 00Prague 2Czech Republic
| | - Annette Trunschke
- Department of Inorganic ChemistryFritz-Haber-Institut der Max-Planck-GesellschaftFaradayweg 4–614195BerlinDeutschland
| | - Thomas Lunkenbein
- Department of Inorganic ChemistryFritz-Haber-Institut der Max-Planck-GesellschaftFaradayweg 4–614195BerlinDeutschland
| | - Marc Armbrüster
- Faculty of Natural SciencesInstitute of ChemistryMaterials for Innovative Energy ConceptsChemnitz University of TechnologyStraße der Nationen 6209111ChemnitzDeutschland
| | - Josef Breu
- Bavarian Polymer Institute and Department of ChemistryUniversity of BayreuthUniversitätsstraße 3095447BayreuthDeutschland
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14
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Ament K, Wagner DR, Götsch T, Kikuchi T, Kröhnert J, Trunschke A, Lunkenbein T, Sasaki T, Breu J. Enhancing the Catalytic Activity of Palladium Nanoparticles via Sandwich-Like Confinement by Thin Titanate Nanosheets. ACS Catal 2021; 11:2754-2762. [PMID: 33815894 PMCID: PMC8016112 DOI: 10.1021/acscatal.1c00031] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 02/04/2021] [Indexed: 11/29/2022]
Abstract
As atomically thin oxide layers deposited on flat (noble) metal surfaces have been proven to have a significant influence on the electronic structure and thus the catalytic activity of the metal, we sought to mimic this architecture at the bulk scale. This could be achieved by intercalating small positively charged Pd nanoparticles of size 3.8 nm into a nematic liquid crystalline phase of lepidocrocite-type layered titanate. Upon intercalation the galleries collapsed and Pd nanoparticles were captured in a sandwichlike mesoporous architecture showing good accessibility to Pd nanoparticles. On the basis of X-ray photoelectron spectroscopy (XPS) and CO diffuse reflectance Fourier transform infrared spectroscopy (DRIFTS) Pd was found to be in a partially oxidized state, while a reduced Ti species indicated an electronic interaction between nanoparticles and nanosheets. The close contact of titanate sandwiching Pd nanoparticles, moreover, allows for the donation of a lattice oxygen to the noble metal (inverse spillover). Due to the metal-support interactions of this peculiar support, the catalyst exhibited the oxidation of CO with a turnover frequency as high as 0.17 s-1 at a temperature of 100 °C.
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Affiliation(s)
- Kevin Ament
- Bavarian
Polymer Institute and Department of Chemistry, University of Bayreuth, 95447 Bayreuth, Germany
| | - Daniel R. Wagner
- Bavarian
Polymer Institute and Department of Chemistry, University of Bayreuth, 95447 Bayreuth, Germany
| | - Thomas Götsch
- Department
of Inorganic Chemistry, Fritz-Haber-Institut
der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Takayuki Kikuchi
- International
Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Jutta Kröhnert
- Department
of Inorganic Chemistry, Fritz-Haber-Institut
der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Annette Trunschke
- Department
of Inorganic Chemistry, Fritz-Haber-Institut
der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Thomas Lunkenbein
- Department
of Inorganic Chemistry, Fritz-Haber-Institut
der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Takayoshi Sasaki
- International
Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Josef Breu
- Bavarian
Polymer Institute and Department of Chemistry, University of Bayreuth, 95447 Bayreuth, Germany
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15
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Freund HJ, Heyde M, Kuhlenbeck H, Nilius N, Risse T, Schmidt T, Shaikhutdinov S, Sterrer M. Chapter model systems in heterogeneous catalysis at the atomic level: a personal view. Sci China Chem 2020. [DOI: 10.1007/s11426-019-9671-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AbstractThe review presents an overview of studies in the surface science of oxide and related surfaces with an emphasis of the studies performed in the authors’ group. Novel instruments and technique developments, as well as their applications are reported, in an attempt to cover studies on model systems of increasing complexity, including some of the key ingredients of an industrially applied heterogeneous catalyst and its fabrication. The review is intended to demonstrate the power of model studies in understanding heterogeneous catalysis at the atomic level. The studies include those on supported nano-particles, both, prepared in vacuum and from solution, interaction of surfaces and the underlying bulk with molecules from the gas phase, strong metal support interaction, as well as the first attempt to include studies on reactions in confined spaces.
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16
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Oxidation of Thin Titanium Films: Determination of the Chemical Composition of the Oxide and the Oxygen Diffusion Factor. CRYSTALS 2020. [DOI: 10.3390/cryst10020117] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The morphologies and local electronic structures of titanium coatings deposited on the surfaces of highly oriented pyrolytic graphite were determined. Chemical compositions of the oxides formed on the coating surfaces were established. A theoretical model was developed describing the changes in the TiOx oxides (1.75 < x < 2) band gap depending on the duration and temperature of the titanium film annealing procedure in oxygen. The effective activation energy of oxygen diffusion in TiOx (1.75 < x < 2) was determined, and the pre-exponential factor of the diffusion coefficient was estimated.
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17
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Sakaushi K. Quantum electrocatalysts: theoretical picture, electrochemical kinetic isotope effect analysis, and conjecture to understand microscopic mechanisms. Phys Chem Chem Phys 2020; 22:11219-11243. [DOI: 10.1039/d0cp01052a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The fundamental aspects of quantum electrocatalysts are discussed together with the newly developed electrochemical kinetic isotope effect (EC-KIE) approach.
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Affiliation(s)
- Ken Sakaushi
- Center for Green Research on Energy and Environmental Materials
- National Institute for Materials Science
- Tsukuba
- Japan
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18
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Sakaushi K, Kumeda T, Hammes-Schiffer S, Melander MM, Sugino O. Advances and challenges for experiment and theory for multi-electron multi-proton transfer at electrified solid–liquid interfaces. Phys Chem Chem Phys 2020; 22:19401-19442. [DOI: 10.1039/d0cp02741c] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Understanding microscopic mechanism of multi-electron multi-proton transfer reactions at complexed systems is important for advancing electrochemistry-oriented science in the 21st century.
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Affiliation(s)
- Ken Sakaushi
- Center for Green Research on Energy and Environmental Materials
- National Institute for Materials Science
- Ibaraki 305-0044
- Japan
| | - Tomoaki Kumeda
- Center for Green Research on Energy and Environmental Materials
- National Institute for Materials Science
- Ibaraki 305-0044
- Japan
| | | | - Marko M. Melander
- Nanoscience Center
- Department of Chemistry
- University of Jyväskylä
- Jyväskylä
- Finland
| | - Osamu Sugino
- The Institute of Solid State Physics
- the University of Tokyo
- Chiba 277-8581
- Japan
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19
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Davis EM, Berti G, Kuhlenbeck H, Vonk V, Stierle A, Freund HJ. Growth of well-ordered iron sulfide thin films. Phys Chem Chem Phys 2019; 21:20204-20210. [PMID: 31486466 DOI: 10.1039/c9cp04157e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In this paper a growth recipe for well-ordered iron sulfide films and the results of their characterisation are presented. The film was studied using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), low energy electron diffraction (LEED), and scanning tunneling microscopy (STM). XRD data reveal that the film has a NiAs-like structure with Fe vacancies, similar to iron sulfides such as pyrrhotite and smythite, although no indication of any ordering of these vacancies was observed. LEED and STM results show that the film exhibits a 2 × 2 surface reconstruction. XPS data provide additional evidence for a large number of Fe vacancies, and the oxidation states of the Fe and S in the film are analysed.
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Affiliation(s)
- Earl Matthew Davis
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
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20
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Sarvadii SY, Kharitonov VA, Dokhlikova NV, Grishin MV, Shub BR. Change in the Electronic Structure of Oxide Films on the Surface of a Titanium Coating in the Process of Interaction with Oxygen. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2019. [DOI: 10.1134/s1990793119030217] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Roiaz M, Falivene L, Rameshan C, Cavallo L, Kozlov SM, Rupprechter G. Roughening of Copper (100) at Elevated CO Pressure: Cu Adatom and Cluster Formation Enable CO Dissociation. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2019; 123:8112-8121. [PMID: 30976376 PMCID: PMC6453259 DOI: 10.1021/acs.jpcc.8b07668] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 10/11/2018] [Indexed: 05/16/2023]
Abstract
Carbon monoxide participates in many copper-catalyzed reactions, which makes CO-induced structural changes of Cu catalysts key for important industrial processes. We have studied the interaction of carbon monoxide with the Cu(100) single crystal termination at 120, 200, and 300 K by means of low-energy electron diffraction (LEED), temperature-programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS), polarization-modulation infrared reflection absorption spectroscopy (PM-IRAS), and density functional theory (DFT) calculations. The absorption band of CO (2082-2112 cm-1) at elevated gas pressure (up to 5 mbar) and at 200/300 K was found at a higher wavenumber than the characteristic band of the c(2 × 2)CO structure and was consistent with CO adsorbed on low-coordinated Cu atoms. The combined PM-IRAS/DFT analysis revealed that exposure to CO induced surface roughening through the formation of Cu adatoms and clusters on the (100) terraces. The roughened surface seemed surprisingly active for CO dissociation, which indicates its unique catalytic properties.
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Affiliation(s)
- Matteo Roiaz
- Institute
of Materials Chemistry, Technische Universität
Wien, 1060 Vienna, Austria
| | - Laura Falivene
- KAUST
Catalysis Center, Kind Abdullah University
of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Christoph Rameshan
- Institute
of Materials Chemistry, Technische Universität
Wien, 1060 Vienna, Austria
| | - Luigi Cavallo
- KAUST
Catalysis Center, Kind Abdullah University
of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Sergey M. Kozlov
- KAUST
Catalysis Center, Kind Abdullah University
of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Günther Rupprechter
- Institute
of Materials Chemistry, Technische Universität
Wien, 1060 Vienna, Austria
- E-mail:
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22
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23
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Barcaro G, Fortunelli A. 2D oxides on metal materials: concepts, status, and perspectives. Phys Chem Chem Phys 2019; 21:11510-11536. [DOI: 10.1039/c9cp00972h] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two-dimensional oxide-on-metal materials: concepts, methods, and link to technological applications, with 5 subtopics: structural motifs, robustness, catalysis, ternaries, and nanopatterning.
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24
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Heard CJ, Čejka J, Opanasenko M, Nachtigall P, Centi G, Perathoner S. 2D Oxide Nanomaterials to Address the Energy Transition and Catalysis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1801712. [PMID: 30132995 DOI: 10.1002/adma.201801712] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 05/18/2018] [Indexed: 05/24/2023]
Abstract
2D oxide nanomaterials constitute a broad range of materials, with a wide array of current and potential applications, particularly in the fields of energy storage and catalysis for sustainable energy production. Despite the many similarities in structure, composition, and synthetic methods and uses, the current literature on layered oxides is diverse and disconnected. A number of reviews can be found in the literature, but they are mostly focused on one of the particular subclasses of 2D oxides. This review attempts to bridge the knowledge gap between individual layered oxide types by summarizing recent developments in all important 2D oxide systems including supported ultrathin oxide films, layered clays and double hydroxides, layered perovskites, and novel 2D-zeolite-based materials. Particular attention is paid to the underlying similarities and differences between the various materials, and the subsequent challenges faced by each research community. The potential of layered oxides toward future applications is critically evaluated, especially in the areas of electrocatalysis and photocatalysis, biomass conversion, and fine chemical synthesis. Attention is also paid to corresponding novel 3D materials that can be obtained via sophisticated engineering of 2D oxides.
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Affiliation(s)
- Christopher J Heard
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, 128 43, Prague 2, Czech Republic
| | - Jiří Čejka
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, 128 43, Prague 2, Czech Republic
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Science, Dolejškova 3, 182 23, Prague 8, Czech Republic
| | - Maksym Opanasenko
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, 128 43, Prague 2, Czech Republic
| | - Petr Nachtigall
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, 128 43, Prague 2, Czech Republic
| | - Gabriele Centi
- Dept.s MIFT and ChiBioFarAm-Industrial Chemistry, University of Messina, ERIC aisbl and CASPE/INSTM, V.le F. Stagno S'Alcontres 31, 98166, Messina, Italy
| | - Siglinda Perathoner
- Dept.s MIFT and ChiBioFarAm-Industrial Chemistry, University of Messina, ERIC aisbl and CASPE/INSTM, V.le F. Stagno S'Alcontres 31, 98166, Messina, Italy
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25
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Farber RG, Turano ME, Killelea DR. Identification of Surface Sites for Low-Temperature Heterogeneously Catalyzed CO Oxidation on Rh(111). ACS Catal 2018. [DOI: 10.1021/acscatal.8b03887] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rachael G. Farber
- Department of Chemistry and Biochemistry, Loyola University Chicago, 1068 W. Sheridan Road, Chicago, Illinois 60660, United States
| | - Marie E. Turano
- Department of Chemistry and Biochemistry, Loyola University Chicago, 1068 W. Sheridan Road, Chicago, Illinois 60660, United States
| | - Daniel R. Killelea
- Department of Chemistry and Biochemistry, Loyola University Chicago, 1068 W. Sheridan Road, Chicago, Illinois 60660, United States
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26
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He H, Chen J, Zhang D, Li F, Chen X, Chen Y, Bian L, Wang Q, Duan P, Wen Z, Lv X. Modulating the Electrocatalytic Performance of Palladium with the Electronic Metal–Support Interaction: A Case Study on Oxygen Evolution Reaction. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00460] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Hongyang He
- Department of Energy and Chemical Engineering, College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, P. R. China
| | - Junxiang Chen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Province Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P.R. China
| | - Dafeng Zhang
- Department of Energy and Chemical Engineering, College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, P. R. China
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Fang Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Xin Chen
- Department of Energy and Chemical Engineering, College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, P. R. China
| | - Yumei Chen
- Department of Energy and Chemical Engineering, College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, P. R. China
| | - Linyan Bian
- Department of Energy and Chemical Engineering, College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, P. R. China
| | - Qiufen Wang
- Department of Energy and Chemical Engineering, College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, P. R. China
| | - Peigao Duan
- Department of Energy and Chemical Engineering, College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, P. R. China
| | - Zhenhai Wen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Province Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P.R. China
| | - Xiaojun Lv
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China
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27
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Hübner O, Himmel HJ. Metal Cluster Models for Heterogeneous Catalysis: A Matrix-Isolation Perspective. Chemistry 2018; 24:8941-8961. [PMID: 29457854 DOI: 10.1002/chem.201706097] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Indexed: 01/25/2023]
Abstract
Metal cluster models are of high relevance for establishing new mechanistic concepts for heterogeneous catalysis. The high reactivity and particular selectivity of metal clusters is caused by the wealth of low-lying electronically excited states that are often thermally populated. Thereby the metal clusters are flexible with regard to their electronic structure and can adjust their states to be appropriate for the reaction with a particular substrate. The matrix isolation technique is ideally suited for studying excited state reactivity. The low matrix temperatures (generally 4-40 K) of the noble gas matrix host guarantee that all clusters are in their electronic ground-state (with only a very few exceptions). Electronically excited states can then be selectively populated and their reactivity probed. Unfortunately, a systematic research in this direction has not been made up to date. The purpose of this review is to provide the grounds for a directed approach to understand cluster reactivity through matrix-isolation studies combined with quantum chemical calculations.
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Affiliation(s)
- Olaf Hübner
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
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28
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Noh MC, Kim J, Doh WH, Kim KJ, Park JY. Reversible Oxygen-Driven Nickel Oxide Structural Transition on the Nickel(1 1 1) Surface at Near-Ambient Pressure. ChemCatChem 2018. [DOI: 10.1002/cctc.201702002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Myung Cheol Noh
- Graduate School of EEWS; Korea Advanced Institute of Science and Technology; Daejeon 34141 Republic of Korea
- Center for Nanomaterials and Chemical Reactions; Institute for Basic Science; Daejeon 34141 Republic of Korea
| | - Jeongjin Kim
- Graduate School of EEWS; Korea Advanced Institute of Science and Technology; Daejeon 34141 Republic of Korea
- Center for Nanomaterials and Chemical Reactions; Institute for Basic Science; Daejeon 34141 Republic of Korea
| | - Won Hui Doh
- Center for Nanomaterials and Chemical Reactions; Institute for Basic Science; Daejeon 34141 Republic of Korea
| | - Ki-Jeong Kim
- Beamline Research Division; Pohang Accelerator Laboratory; Pohang 37673 Republic of Korea
| | - Jeong Young Park
- Graduate School of EEWS; Korea Advanced Institute of Science and Technology; Daejeon 34141 Republic of Korea
- Center for Nanomaterials and Chemical Reactions; Institute for Basic Science; Daejeon 34141 Republic of Korea
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29
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Xie L, Chen T, Chan HC, Shu Y, Gao Q. Hydrogen Doping into MoO3
Supports toward Modulated Metal-Support Interactions and Efficient Furfural Hydrogenation on Iridium Nanocatalysts. Chem Asian J 2018; 13:641-647. [PMID: 29316295 DOI: 10.1002/asia.201701661] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 01/03/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Lifang Xie
- Department of Chemistry, College of Chemistry and Materials Science; Jinan University; No. 601 Huangpu Avenue West 510632 Guangzhou P.R. China
| | - Ting Chen
- Department of Chemistry, College of Chemistry and Materials Science; Jinan University; No. 601 Huangpu Avenue West 510632 Guangzhou P.R. China
| | - Hang Cheong Chan
- Department of Chemistry, College of Chemistry and Materials Science; Jinan University; No. 601 Huangpu Avenue West 510632 Guangzhou P.R. China
| | - Yijin Shu
- Department of Chemistry, College of Chemistry and Materials Science; Jinan University; No. 601 Huangpu Avenue West 510632 Guangzhou P.R. China
| | - Qingsheng Gao
- Department of Chemistry, College of Chemistry and Materials Science; Jinan University; No. 601 Huangpu Avenue West 510632 Guangzhou P.R. China
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30
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Zhang K, Li L, Shaikhutdinov S, Freund HJ. Carbon Monoxide Oxidation on Metal-Supported Monolayer Oxide Films: Establishing Which Interface is Active. Angew Chem Int Ed Engl 2018; 57:1261-1265. [DOI: 10.1002/anie.201710934] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 11/22/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Ke Zhang
- Fritz-Haber-Institute, Max Planck Society; Faradayweg 4-6 14195 Berlin Germany
- Present address: Institute of Physics; Ecole Polytechnique Federale de Lausanne (EPFL); 1015 Lausanne Switzerland
| | - Linfei Li
- Fritz-Haber-Institute, Max Planck Society; Faradayweg 4-6 14195 Berlin Germany
| | | | - Hans-Joachim Freund
- Fritz-Haber-Institute, Max Planck Society; Faradayweg 4-6 14195 Berlin Germany
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31
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Zhang K, Li L, Shaikhutdinov S, Freund HJ. Carbon Monoxide Oxidation on Metal-Supported Monolayer Oxide Films: Establishing Which Interface is Active. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201710934] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ke Zhang
- Fritz-Haber-Institute, Max Planck Society; Faradayweg 4-6 14195 Berlin Germany
- Present address: Institute of Physics; Ecole Polytechnique Federale de Lausanne (EPFL); 1015 Lausanne Switzerland
| | - Linfei Li
- Fritz-Haber-Institute, Max Planck Society; Faradayweg 4-6 14195 Berlin Germany
| | | | - Hans-Joachim Freund
- Fritz-Haber-Institute, Max Planck Society; Faradayweg 4-6 14195 Berlin Germany
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32
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Pacchioni G, Freund HJ. Controlling the charge state of supported nanoparticles in catalysis: lessons from model systems. Chem Soc Rev 2018; 47:8474-8502. [DOI: 10.1039/c8cs00152a] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Model systems are very important to identify the working principles of real catalysts, and to develop concepts that can be used in the design of new catalytic materials.
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Affiliation(s)
| | - Hans-Joachim Freund
- Fritz-Haber-Institut der Max-Planck-Gesellschaft
- Department of Chemical Physics
- 14195 Berlin
- Germany
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33
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Möller C, Fedderwitz H, Noguera C, Goniakowski J, Nilius N. Temperature-dependent phase evolution of copper-oxide thin-films on Au(111). Phys Chem Chem Phys 2018; 20:5636-5643. [DOI: 10.1039/c7cp08387d] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
STM and DFT calculations are employed to explore structural phase transitions in thin copper-oxide films grown on Au(111).
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Affiliation(s)
- Christoph Möller
- Carl von Ossietzky Universität Oldenburg
- Institut für Physik
- Oldenburg D-26111
- Germany
| | - Hanna Fedderwitz
- Carl von Ossietzky Universität Oldenburg
- Institut für Physik
- Oldenburg D-26111
- Germany
| | - Claudine Noguera
- CNRS
- Institut des Nanosciences de Paris
- UMR 7588
- Paris F-75005
- France
| | | | - Niklas Nilius
- Carl von Ossietzky Universität Oldenburg
- Institut für Physik
- Oldenburg D-26111
- Germany
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34
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Pan Q, Li L, Shaikhutdinov S, Fujimori Y, Hollerer M, Sterrer M, Freund HJ. Model systems in heterogeneous catalysis: towards the design and understanding of structure and electronic properties. Faraday Discuss 2018; 208:307-323. [DOI: 10.1039/c7fd00209b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We discuss in this paper two case studies related to nano-particle catalyst systems: one concerns a model system for the Cr/SiO2 Phillips catalyst for ethylene polymerization and the other provides additional information on Au nano-particles supported on ultrathin MgO(100)/Ag(100) films.
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Affiliation(s)
- Q. Pan
- Fritz-Haber-Institute of the Max-Planck Society
- Department of Chemical Physics
- 14195 Berlin
- Germany
| | - L. Li
- Fritz-Haber-Institute of the Max-Planck Society
- Department of Chemical Physics
- 14195 Berlin
- Germany
| | - S. Shaikhutdinov
- Fritz-Haber-Institute of the Max-Planck Society
- Department of Chemical Physics
- 14195 Berlin
- Germany
| | - Y. Fujimori
- Fritz-Haber-Institute of the Max-Planck Society
- Department of Chemical Physics
- 14195 Berlin
- Germany
| | - M. Hollerer
- University of Graz
- Institute of Physics
- NAWI Graz
- Universitätsplatz 5
- 8010 Graz
| | - M. Sterrer
- University of Graz
- Institute of Physics
- NAWI Graz
- Universitätsplatz 5
- 8010 Graz
| | - H.-J. Freund
- Fritz-Haber-Institute of the Max-Planck Society
- Department of Chemical Physics
- 14195 Berlin
- Germany
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35
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Liu Y, Ning Y, Yu L, Zhou Z, Liu Q, Zhang Y, Chen H, Xiao J, Liu P, Yang F, Bao X. Structure and Electronic Properties of Interface-Confined Oxide Nanostructures. ACS NANO 2017; 11:11449-11458. [PMID: 29035514 DOI: 10.1021/acsnano.7b06164] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The controlled fabrication of nanostructures has often used a substrate template to mediate and control the growth kinetics. Electronic substrate-mediated interactions have been demonstrated to guide the assembly of organic molecules or the nucleation of metal atoms but usually at cryogenic temperatures, where the diffusion has been limited. Combining STM, STS, and DFT studies, we report that the strong electronic interaction between transition metals and oxides could indeed govern the growth of low-dimensional oxide nanostructures. As a demonstration, a series of FeO triangles, which are of the same structure and electronic properties but with different sizes (side length >3 nm), are synthesized on Pt(111). The strong interfacial interaction confines the growth of FeO nanostructures, leading to a discrete size distribution and a uniform step structure. Given the same interfacial configuration, as-grown FeO nanostructures not only expose identical edge/surface structure but also exhibit the same electronic properties, as manifested by the local density of states and local work functions. We expect the interfacial confinement effect can be generally applied to control the growth of oxide nanostructures on transition metal surfaces. These oxide nanostructures of the same structure and electronic properties are excellent models for studies of nanoscale effects and applications.
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Affiliation(s)
- Yun Liu
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Yanxiao Ning
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Liang Yu
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Zhiwen Zhou
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Qingfei Liu
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Yi Zhang
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Hao Chen
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Jianping Xiao
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Ping Liu
- Chemistry Department, Brookhaven National Laboratory , Upton, New York 11973, United States
| | - Fan Yang
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Xinhe Bao
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
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36
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Schneider WD, Heyde M, Freund HJ. Charge Control in Model Catalysis: The Decisive Role of the Oxide-Nanoparticle Interface. Chemistry 2017; 24:2317-2327. [PMID: 28857287 DOI: 10.1002/chem.201703169] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Indexed: 11/06/2022]
Abstract
In chemistry and physics the electronic charge on a species or material is one important determinant of its properties. In the present Minireview, the essential requirements for a model catalyst system suitable to study charge control are discussed. The ideal model catalyst for this purpose consists of a material system, which comprises a single crystal metal support, covered by an epitaxially grown ultrathin oxide film, and flat, two-dimensional nanoparticles residing on this film. Several examples from the literature are selected and presented, which illustrate various aspects of electron transport from the support to the nanoparticle and vice versa. Key experiments demonstrate charge control within such model catalysts and give direct evidence for a chemical reaction at the perimeter of Au nanoparticles. The concepts derived from these studies are then taken a step further to see how they may be applied for bulk powder oxide supported nanoparticles as they are frequently found in catalytically active materials.
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Affiliation(s)
- Wolf-Dieter Schneider
- Department of Chemical Physics, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Markus Heyde
- Department of Chemical Physics, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Hans-Joachim Freund
- Department of Chemical Physics, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
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37
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The role of electronic metal-support interactions and its temperature dependence: CO adsorption and CO oxidation on Au/TiO2 catalysts in the presence of TiO2 bulk defects. J Catal 2017. [DOI: 10.1016/j.jcat.2017.07.029] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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38
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Vandichel M, Moscu A, Grönbeck H. Catalysis at the Rim: A Mechanism for Low Temperature CO Oxidation over Pt3Sn. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02094] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Matthias Vandichel
- Department of Physics and Competence
Centre for Catalysis, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Alina Moscu
- Department of Physics and Competence
Centre for Catalysis, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Henrik Grönbeck
- Department of Physics and Competence
Centre for Catalysis, Chalmers University of Technology, 412 96 Göteborg, Sweden
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39
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Copéret C, Liao WC, Gordon CP, Ong TC. Active Sites in Supported Single-Site Catalysts: An NMR Perspective. J Am Chem Soc 2017; 139:10588-10596. [DOI: 10.1021/jacs.6b12981] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Christophe Copéret
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Wei-Chih Liao
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Christopher P. Gordon
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Ta-Chung Ong
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
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40
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Park JY, Lee SW, Lee C, Lee H. Strategies for Hot Electron-Mediated Catalytic Reactions: Catalytronics. Catal Letters 2017. [DOI: 10.1007/s10562-017-2092-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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41
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In situ dynamic tracking of heterogeneous nanocatalytic processes by shell-isolated nanoparticle-enhanced Raman spectroscopy. Nat Commun 2017; 8:15447. [PMID: 28537269 PMCID: PMC5458081 DOI: 10.1038/ncomms15447] [Citation(s) in RCA: 117] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 03/30/2017] [Indexed: 12/23/2022] Open
Abstract
Surface molecular information acquired in situ from a catalytic process can greatly promote the rational design of highly efficient catalysts by revealing structure-activity relationships and reaction mechanisms. Raman spectroscopy can provide this rich structural information, but normal Raman is not sensitive enough to detect trace active species adsorbed on the surface of catalysts. Here we develop a general method for in situ monitoring of heterogeneous catalytic processes through shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) satellite nanocomposites (Au-core silica-shell nanocatalyst-satellite structures), which are stable and have extremely high surface Raman sensitivity. By combining operando SHINERS with density functional theory calculations, we identify the working mechanisms for CO oxidation over PtFe and Pd nanocatalysts, which are typical low- and high-temperature catalysts, respectively. Active species, such as surface oxides, superoxide/peroxide species and Pd–C/Pt–C bonds are directly observed during the reactions. We demonstrate that in situ SHINERS can provide a deep understanding of the fundamental concepts of catalysis. Rational design of heterogeneous catalysts requires molecular understanding of catalytic processes. Here, the authors attach PtFe and Pd nanocatalysts to Raman signal-enhancing Au-silica nanoparticles, allowing them to spectroscopically observe the active species and bonds involved in CO oxidation in real time.
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42
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Folkertsma E, van der Lit J, Di Cicco F, Lutz M, Klein Gebbink RJM, Swart I, Moret ME. Combination of Scanning Probe Microscopy and Coordination Chemistry: Structural and Electronic Study of Bis(methylbenzimidazolyl)ketone and Its Iron Complex. ACS OMEGA 2017; 2:1372-1379. [PMID: 28474011 PMCID: PMC5410654 DOI: 10.1021/acsomega.6b00510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 03/23/2017] [Indexed: 06/07/2023]
Abstract
Here, we report the bulk synthesis of [FeII(BMBIK)Cl2] bearing the redox noninnocent bis(methylbenzimidazolyl)ketone (BMBIK) ligand and the synthesis of the similar complex [FeI(BMBIK)]+ on a Au(111) surface using lateral manipulation at the atomic level. Cyclic voltammetry and scanning tunneling spectroscopy are shown to be useful techniques to compare the coordination compound in solution with the one on the surface. The total charge, as well as the oxidation and spin state of [FeI(BMBIK)]+, are investigated by comparison of the shape of the lowest unoccupied molecular orbital (LUMO), visualized by tunneling through the LUMO, with theoretical models. The similar reduction potentials found for the solution and surface compounds indicate that the major effect of lowering the LUMO upon coordination of BMBIK to the iron center is conserved on the surface. The synthesis and analysis of [FeI(BMBIK)]+ using scanning tunneling microscopy, scanning tunneling spectroscopy, and atomic force microscopy are the first steps toward mechanistic studies of homogeneous catalysts with redox noninnocent ligands at the single molecule level.
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Affiliation(s)
- Emma Folkertsma
- Organic
Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Joost van der Lit
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, P.O.
Box 80000, 3508 TA Utrecht, The Netherlands
| | - Francesca Di Cicco
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, P.O.
Box 80000, 3508 TA Utrecht, The Netherlands
| | - Martin Lutz
- Crystal
and Structural Chemistry, Bijvoet Center for Biomolecular Research,
Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Robertus J. M. Klein Gebbink
- Organic
Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Ingmar Swart
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, P.O.
Box 80000, 3508 TA Utrecht, The Netherlands
| | - Marc-Etienne Moret
- Organic
Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
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43
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Wang Y, Wöll C. IR spectroscopic investigations of chemical and photochemical reactions on metal oxides: bridging the materials gap. Chem Soc Rev 2017; 46:1875-1932. [DOI: 10.1039/c6cs00914j] [Citation(s) in RCA: 130] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In this review, we highlight recent progress (2008–2016) in infrared reflection absorption spectroscopy (IRRAS) studies on oxide powders achieved by using different types of metal oxide single crystals as reference systems.
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Affiliation(s)
- Yuemin Wang
- Institute of Functional Interfaces
- Karlsruhe Institute of Technology
- Eggenstein-Leopoldshafen
- Germany
| | - Christof Wöll
- Institute of Functional Interfaces
- Karlsruhe Institute of Technology
- Eggenstein-Leopoldshafen
- Germany
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44
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Lanzafame P, Perathoner S, Centi G, Gross S, Hensen EJM. Grand challenges for catalysis in the Science and Technology Roadmap on Catalysis for Europe: moving ahead for a sustainable future. Catal Sci Technol 2017. [DOI: 10.1039/c7cy01067b] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This perspective discusses the general concepts that will guide future catalysis and related grand challenges based on the Science and Technology Roadmap on Catalysis for Europe prepared by the European Cluster on Catalysis.
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Affiliation(s)
- P. Lanzafame
- Dept.s ChiBioFarAm and MIFT – Chimica Industriale
- University of Messina (Italy)
- INSTM/CASPE and ERIC aisbl
- 98166 Messina
- Italy
| | - S. Perathoner
- Dept.s ChiBioFarAm and MIFT – Chimica Industriale
- University of Messina (Italy)
- INSTM/CASPE and ERIC aisbl
- 98166 Messina
- Italy
| | - G. Centi
- Dept.s ChiBioFarAm and MIFT – Chimica Industriale
- University of Messina (Italy)
- INSTM/CASPE and ERIC aisbl
- 98166 Messina
- Italy
| | - S. Gross
- Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia
- ICMATE-CNR
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- 35131 Padova
| | - E. J. M. Hensen
- Laboratory of Inorganic Materials Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
- The Netherlands
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45
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Deng X, Sorescu DC, Lee J. Enhanced adsorption of CO2 at steps of ultrathin ZnO: the importance of Zn–O geometry and coordination. Phys Chem Chem Phys 2017; 19:5296-5303. [DOI: 10.1039/c6cp08379j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ultrathin ZnO grown on Au(111) offers a unique environment of the Zn cations and O anions at the steps to facilitate enhanced adsorption of CO2.
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Affiliation(s)
- Xingyi Deng
- National Energy Technology Laboratory (NETL)
- United States Department of Energy
- P.O. Box 10940
- Pittsburgh
- USA
| | - Dan C. Sorescu
- National Energy Technology Laboratory (NETL)
- United States Department of Energy
- P.O. Box 10940
- Pittsburgh
- USA
| | - Junseok Lee
- National Energy Technology Laboratory (NETL)
- United States Department of Energy
- P.O. Box 10940
- Pittsburgh
- USA
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46
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Björkman T, Skakalova V, Kurasch S, Kaiser U, Meyer JC, Smet JH, Krasheninnikov AV. Vibrational Properties of a Two-Dimensional Silica Kagome Lattice. ACS NANO 2016; 10:10929-10935. [PMID: 28024359 PMCID: PMC5198257 DOI: 10.1021/acsnano.6b05577] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 11/09/2016] [Indexed: 06/06/2023]
Abstract
Kagome lattices are structures possessing fascinating magnetic and vibrational properties, but in spite of a large body of theoretical work, experimental realizations and investigations of their dynamics are scarce. Using a combination of Raman spectroscopy and density functional theory calculations, we study the vibrational properties of two-dimensional silica (2D-SiO2), which has a kagome lattice structure. We identify the signatures of crystalline and amorphous 2D-SiO2 structures in Raman spectra and show that, at finite temperatures, the stability of 2D-SiO2 lattice is strongly influenced by phonon-phonon interaction. Our results not only provide insights into the vibrational properties of 2D-SiO2 and kagome lattices in general but also suggest a quick nondestructive method to detect 2D-SiO2.
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Affiliation(s)
- Torbjörn Björkman
- Physics/Department
of Natural Sciences, Åbo Akademi, Turku FI-20500, Finland
- Department
of Applied Physics, Aalto University School
of Science, P.O. Box 11100, Aalto 00076, Finland
| | - Viera Skakalova
- Faculty
of Physics, University of Vienna, Boltzmanngasse 5, Wien 1190, Austria
- STU Center
for Nanodiagnostics, Vazovova 5, Bratislava 81243, Slovakia
| | - Simon Kurasch
- Electron
Microscopy Group of Materials Science, University
of Ulm, Ulm 89081, Germany
| | - Ute Kaiser
- Electron
Microscopy Group of Materials Science, University
of Ulm, Ulm 89081, Germany
| | - Jannik C. Meyer
- Faculty
of Physics, University of Vienna, Boltzmanngasse 5, Wien 1190, Austria
| | - Jurgen H. Smet
- Max
Planck Institute for Solid State Research, Stuttgart 70569, Germany
| | - Arkady V. Krasheninnikov
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
- Department
of Applied Physics, Aalto University School
of Science, P.O. Box 11100, Aalto 00076, Finland
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47
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Heine C, Lechner BAJ, Bluhm H, Salmeron M. Recycling of CO 2: Probing the Chemical State of the Ni(111) Surface during the Methanation Reaction with Ambient-Pressure X-Ray Photoelectron Spectroscopy. J Am Chem Soc 2016; 138:13246-13252. [PMID: 27599672 DOI: 10.1021/jacs.6b06939] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Using ambient-pressure X-ray photoelectron spectroscopy (AP-XPS), we studied the adsorption and reactions of CO2 and CO2 + H2 on the Ni(111) surface to identify the surface chemical state and the nature of the adsorbed species during the methanation reaction. In 200 mTorr CO2, we found that NiO is formed from CO2 dissociation into CO and atomic oxygen. Additionally, carbonate (CO32-) is present on the surface from further reaction of CO2 with NiO. The addition of H2 into the reaction environment leads to reduction of NiO and the disappearance of CO32-. At temperatures >160 °C, CO adsorbed on hollow sites, and atomic carbon and OH species are present on the surface. We conclude that the methanation reaction proceeds via dissociation of CO2, followed by reduction of CO to atomic carbon and its hydrogenation to methane.
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Affiliation(s)
| | | | | | - Miquel Salmeron
- Department of Materials Science and Engineering, University of California , Berkeley, California 94720, United States
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