1
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Wang C, Sombut P, Puntscher L, Jakub Z, Meier M, Pavelec J, Bliem R, Schmid M, Diebold U, Franchini C, Parkinson GS. CO-Induced Dimer Decay Responsible for Gem-Dicarbonyl Formation on a Model Single-Atom Catalyst. Angew Chem Int Ed Engl 2024; 63:e202317347. [PMID: 38294119 DOI: 10.1002/anie.202317347] [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: 11/14/2023] [Revised: 01/11/2024] [Accepted: 01/17/2024] [Indexed: 02/01/2024]
Abstract
The ability to coordinate multiple reactants at the same active site is important for the wide-spread applicability of single-atom catalysis. Model catalysts are ideal to investigate the link between active site geometry and reactant binding, because the structure of single-crystal surfaces can be precisely determined, the adsorbates imaged by scanning tunneling microscopy (STM), and direct comparisons made to density functional theory. In this study, we follow the evolution of Rh1 adatoms and minority Rh2 dimers on Fe3O4(001) during exposure to CO using time-lapse STM at room temperature. CO adsorption at Rh1 sites results exclusively in stable Rh1CO monocarbonyls, because the Rh atom adapts its coordination to create a stable pseudo-square planar environment. Rh1(CO)2 gem-dicarbonyl species are also observed, but these form exclusively through the breakup of Rh2 dimers via an unstable Rh2(CO)3 intermediate. Overall, our results illustrate how minority species invisible to area-averaging spectra can play an important role in catalytic systems, and show that the decomposition of dimers or small clusters can be an avenue to produce reactive, metastable configurations in single-atom catalysis.
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Affiliation(s)
- Chunlei Wang
- Institute of Applied Physics, TU Wien, Vienna, 1040, Austria
| | - Panukorn Sombut
- Institute of Applied Physics, TU Wien, Vienna, 1040, Austria
| | - Lena Puntscher
- Institute of Applied Physics, TU Wien, Vienna, 1040, Austria
| | - Zdenek Jakub
- Institute of Applied Physics, TU Wien, Vienna, 1040, Austria
- Central European Institute of Technology (CEITEC), Brno University of Technology, Brno, 612 00, Czechia
| | - Matthias Meier
- Institute of Applied Physics, TU Wien, Vienna, 1040, Austria
- Faculty of Physics, Center for Computational Materials Science, University of Vienna, Vienna, 1090, Austria
| | - Jiri Pavelec
- Institute of Applied Physics, TU Wien, Vienna, 1040, Austria
| | - Roland Bliem
- Advanced Research Center for Nanolithography, 1098XG, Amsterdam, Netherlands
| | - Michael Schmid
- Institute of Applied Physics, TU Wien, Vienna, 1040, Austria
| | - Ulrike Diebold
- Institute of Applied Physics, TU Wien, Vienna, 1040, Austria
| | - Cesare Franchini
- Faculty of Physics, Center for Computational Materials Science, University of Vienna, Vienna, 1090, Austria
- Dipartimento di Fisica e Astronomia, Università di Bologna, Bologna, 40127, Italy
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2
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Puntscher L, Sombut P, Wang C, Ulreich M, Pavelec J, Rafsanjani-Abbasi A, Meier M, Lagin A, Setvin M, Diebold U, Franchini C, Schmid M, Parkinson GS. A Multitechnique Study of C 2H 4 Adsorption on Fe 3O 4(001). THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:18378-18388. [PMID: 37752903 PMCID: PMC10518864 DOI: 10.1021/acs.jpcc.3c03684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 08/12/2023] [Indexed: 09/28/2023]
Abstract
The adsorption/desorption of ethene (C2H4), also commonly known as ethylene, on Fe3O4(001) was studied under ultrahigh vacuum conditions using temperature-programmed desorption (TPD), scanning tunneling microscopy, X-ray photoelectron spectroscopy, and density functional theory (DFT)-based computations. To interpret the TPD data, we have employed a new analysis method based on equilibrium thermodynamics. C2H4 adsorbs intact at all coverages and interacts most strongly with surface defects such as antiphase domain boundaries and Fe adatoms. On the regular surface, C2H4 binds atop surface Fe sites up to a coverage of 2 molecules per (√2 × √2)R45° unit cell, with every second Fe occupied. A desorption energy of 0.36 eV is determined by analysis of the TPD spectra at this coverage, which is approximately 0.1-0.2 eV lower than the value calculated by DFT + U with van der Waals corrections. Additional molecules are accommodated in between the Fe rows. These are stabilized by attractive interactions with the molecules adsorbed at Fe sites. The total capacity of the surface for C2H4 adsorption is found to be close to 4 molecules per (√2 × √2)R45° unit cell.
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Affiliation(s)
- Lena Puntscher
- Institute
of Applied Physics, TU Wien, Vienna 1040, Austria
| | | | - Chunlei Wang
- Institute
of Applied Physics, TU Wien, Vienna 1040, Austria
| | - Manuel Ulreich
- Institute
of Applied Physics, TU Wien, Vienna 1040, Austria
| | - Jiri Pavelec
- Institute
of Applied Physics, TU Wien, Vienna 1040, Austria
| | | | - Matthias Meier
- Institute
of Applied Physics, TU Wien, Vienna 1040, Austria
- Faculty
of Physics, Center for Computational Materials Science, University of Vienna, Vienna 1090, Austria
| | - Adam Lagin
- Institute
of Applied Physics, TU Wien, Vienna 1040, Austria
| | - Martin Setvin
- Institute
of Applied Physics, TU Wien, Vienna 1040, Austria
- Department
of Surface and Plasma Science, Faculty of
Mathematics and Physics, Charles University, Prague 180 00, Czech Republic
| | - Ulrike Diebold
- Institute
of Applied Physics, TU Wien, Vienna 1040, Austria
| | - Cesare Franchini
- Faculty
of Physics, Center for Computational Materials Science, University of Vienna, Vienna 1090, Austria
- Dipartimento
di Fisica e Astronomia, Università
di Bologna, Bologna 40126, Italy
| | - Michael Schmid
- Institute
of Applied Physics, TU Wien, Vienna 1040, Austria
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3
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Bianchetti E, Perilli D, Di Valentin C. Improving the Oxygen Evolution Reaction on Fe 3O 4(001) with Single-Atom Catalysts. ACS Catal 2023; 13:4811-4823. [PMID: 37066046 PMCID: PMC10088028 DOI: 10.1021/acscatal.3c00337] [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: 01/23/2023] [Revised: 03/15/2023] [Indexed: 04/18/2023]
Abstract
Doping magnetite surfaces with transition-metal atoms is a promising strategy to improve the catalytic performance toward the oxygen evolution reaction (OER), which governs the overall efficiency of water electrolysis and hydrogen production. In this work, we investigated the Fe3O4(001) surface as a support material for single-atom catalysts of the OER. First, we prepared and optimized models of inexpensive and abundant transition-metal atoms, such as Ti, Co, Ni, and Cu, trapped in various configurations on the Fe3O4(001) surface. Then, we studied their structural, electronic, and magnetic properties through HSE06 hybrid functional calculations. As a further step, we investigated the performance of these model electrocatalysts toward the OER, considering different possible mechanisms, in comparison with the pristine magnetite surface, on the basis of the computational hydrogen electrode model developed by Nørskov and co-workers. Cobalt-doped systems were found to be the most promising electrocatalytic systems among those considered in this work. Overpotential values (∼0.35 V) were in the range of those experimentally reported for mixed Co/Fe oxide (0.2-0.5 V).
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Affiliation(s)
- Enrico Bianchetti
- Dipartimento
di Scienza dei Materiali, Università
di Milano Bicocca, Via Roberto Cozzi 55, 20125 Milano, Italy
| | - Daniele Perilli
- Dipartimento
di Scienza dei Materiali, Università
di Milano Bicocca, Via Roberto Cozzi 55, 20125 Milano, Italy
| | - Cristiana Di Valentin
- Dipartimento
di Scienza dei Materiali, Università
di Milano Bicocca, Via Roberto Cozzi 55, 20125 Milano, Italy
- BioNanoMedicine
Center NANOMIB, Università di Milano
Bicocca, Via Raoul Follereau
3, 20900 Monza, Italy
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4
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Abstract
The field of single-atom catalysis (SAC) has expanded greatly in recent years. While there has been much success developing new synthesis methods, a fundamental disconnect exists between most experiments and the theoretical computations used to model them. The real catalysts are based on powder supports, which inevitably contain a multitude of different facets, different surface sites, defects, hydroxyl groups, and other contaminants due to the environment. This makes it extremely difficult to determine the structure of the active SAC site using current techniques. To be tractable, computations aimed at modeling SAC utilize periodic boundary conditions and low-index facets of an idealized support. Thus, the reaction barriers and mechanisms determined computationally represent, at best, a plausibility argument, and there is a strong chance that some critical aspect is omitted. One way to better understand what is plausible is by experimental modeling, i.e., comparing the results of computations to experiments based on precisely defined single-crystalline supports prepared in an ultrahigh-vacuum (UHV) environment. In this review, we report the status of the surface-science literature as it pertains to SAC. We focus on experimental work on supports where the site of the metal atom are unambiguously determined from experiment, in particular, the surfaces of rutile and anatase TiO2, the iron oxides Fe2O3 and Fe3O4, as well as CeO2 and MgO. Much of this work is based on scanning probe microscopy in conjunction with spectroscopy, and we highlight the remarkably few studies in which metal atoms are stable on low-index surfaces of typical supports. In the Perspective section, we discuss the possibility for expanding such studies into other relevant supports.
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Affiliation(s)
- Florian Kraushofer
- Institute of Applied Physics, Technische Universitat Wien, 1040 Vienna, Austria
| | - Gareth S Parkinson
- Institute of Applied Physics, Technische Universitat Wien, 1040 Vienna, Austria
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5
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Liu Y, Han Z, Gewinner S, Schöllkopf W, Levchenko SV, Kuhlenbeck H, Roldan Cuenya B. Adatom Bonding Sites in a Nickel‐Fe
3
O
4
(001) Single‐Atom Model Catalyst and O
2
Reactivity Unveiled by Surface Action Spectroscopy with Infrared Free‐Electron Laser Light. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yun Liu
- Department of Interface Science Fritz-Haber Institute of the Max Planck Society Faradayweg 4–6 14195 Berlin Germany
| | - Zhongkang Han
- Center for Energy Science and Technology Skolkovo Institute of Science and Technology Bolshoy Blvd. 30/1 121205 Moscow Russia
| | - Sandy Gewinner
- Molecular Physics Department Fritz-Haber Institute of the Max Planck Society Faradayweg 4–6 14195 Berlin Germany
| | - Wieland Schöllkopf
- Molecular Physics Department Fritz-Haber Institute of the Max Planck Society Faradayweg 4–6 14195 Berlin Germany
| | - Sergey V. Levchenko
- Center for Energy Science and Technology Skolkovo Institute of Science and Technology Bolshoy Blvd. 30/1 121205 Moscow Russia
| | - Helmut Kuhlenbeck
- Department of Interface Science Fritz-Haber Institute of the Max Planck Society Faradayweg 4–6 14195 Berlin Germany
| | - Beatriz Roldan Cuenya
- Department of Interface Science Fritz-Haber Institute of the Max Planck Society Faradayweg 4–6 14195 Berlin Germany
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6
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Liu Y, Han Z, Gewinner S, Schöllkopf W, Levchenko SV, Kuhlenbeck H, Roldan Cuenya B. Adatom Bonding Sites in a Nickel-Fe 3 O 4 (001) Single-Atom Model Catalyst and O 2 Reactivity Unveiled by Surface Action Spectroscopy with Infrared Free-Electron Laser Light. Angew Chem Int Ed Engl 2022; 61:e202202561. [PMID: 35502625 PMCID: PMC9400859 DOI: 10.1002/anie.202202561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Indexed: 11/09/2022]
Abstract
Single-atom (SA) catalysis presently receives much attention with its promise to decrease the cost of the active material while increasing the catalyst's performance. However, key details such as the exact location of SA species and their stability are often unclear due to a lack of atomic level information. Here, we show how vibrational spectra measured with surface action spectroscopy (SAS) and density functional theory (DFT) simulations can differentiate between different adatom binding sites and determine the location of Ni and Au single atoms on Fe3 O4 (001). We reveal that Ni and Au adatoms selectively bind to surface oxygen ions which are octahedrally coordinated to Fe ions. In addition, we find that the Ni adatoms can activate O2 to superoxide in contrast to the bare surface and Ni in subsurface positions. Overall, we unveil the advantages of combining SAS and DFT for improving the understanding of single-atom catalysts.
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Affiliation(s)
- Yun Liu
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Zhongkang Han
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Bolshoy Blvd. 30/1, 121205, Moscow, Russia
| | - Sandy Gewinner
- Molecular Physics Department, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Wieland Schöllkopf
- Molecular Physics Department, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Sergey V Levchenko
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Bolshoy Blvd. 30/1, 121205, Moscow, Russia
| | - Helmut Kuhlenbeck
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Beatriz Roldan Cuenya
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
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7
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Meier M, Hulva J, Jakub Z, Kraushofer F, Bobić M, Bliem R, Setvin M, Schmid M, Diebold U, Franchini C, Parkinson GS. CO oxidation by Pt 2/Fe 3O 4: Metastable dimer and support configurations facilitate lattice oxygen extraction. SCIENCE ADVANCES 2022; 8:eabn4580. [PMID: 35363523 PMCID: PMC10938578 DOI: 10.1126/sciadv.abn4580] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 02/09/2022] [Indexed: 06/14/2023]
Abstract
Heterogeneous catalysts based on subnanometer metal clusters often exhibit strongly size-dependent properties, and the addition or removal of a single atom can make all the difference. Identifying the most active species and deciphering the reaction mechanism is extremely difficult, however, because it is often not clear how the catalyst evolves in operando. Here, we use a combination of atomically resolved scanning probe microscopies, spectroscopic techniques, and density functional theory (DFT)-based calculations to study CO oxidation by a model Pt/Fe3O4(001) "single-atom" catalyst. We demonstrate that (PtCO)2 dimers, formed dynamically through the agglomeration of mobile Pt-carbonyl species, catalyze a reaction involving the oxide support to form CO2. Pt2 dimers produce one CO2 molecule before falling apart into two adatoms, releasing the second CO. Olattice extraction only becomes facile when both the Pt-dimer and the Fe3O4 support can access metastable configurations, suggesting that substantial, concerted rearrangements of both cluster and support must be considered for reactions occurring at elevated temperature.
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Affiliation(s)
- Matthias Meier
- Institute of Applied Physics, TU Wien, Vienna, Austria
- Computational Materials Physics, University of Vienna, Vienna, Austria
| | - Jan Hulva
- Institute of Applied Physics, TU Wien, Vienna, Austria
| | - Zdenek Jakub
- Institute of Applied Physics, TU Wien, Vienna, Austria
| | | | - Mislav Bobić
- Institute of Applied Physics, TU Wien, Vienna, Austria
| | - Roland Bliem
- Institute of Applied Physics, TU Wien, Vienna, Austria
| | - Martin Setvin
- Institute of Applied Physics, TU Wien, Vienna, Austria
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
| | | | | | - Cesare Franchini
- Computational Materials Physics, University of Vienna, Vienna, Austria
- Alma Mater Studiorum – Università di Bologna, Bologna, Italy
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8
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Kraushofer F, Haager L, Eder M, Rafsanjani-Abbasi A, Jakub Z, Franceschi G, Riva M, Meier M, Schmid M, Diebold U, Parkinson GS. Single Rh Adatoms Stabilized on α-Fe 2O 3(11̅02) by Coadsorbed Water. ACS ENERGY LETTERS 2022; 7:375-380. [PMID: 35059503 PMCID: PMC8762699 DOI: 10.1021/acsenergylett.1c02405] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 12/17/2021] [Indexed: 06/14/2023]
Abstract
Oxide-supported single-atom catalysts are commonly modeled as a metal atom substituting surface cation sites in a low-index surface. Adatoms with dangling bonds will inevitably coordinate molecules from the gas phase, and adsorbates such as water can affect both stability and catalytic activity. Herein, we use scanning tunneling microscopy (STM), noncontact atomic force microscopy (ncAFM), and X-ray photoelectron spectroscopy (XPS) to show that high densities of single Rh adatoms are stabilized on α-Fe2O3(11̅02) in the presence of 2 × 10-8 mbar of water at room temperature, in marked contrast to the rapid sintering observed under UHV conditions. Annealing to 50 °C in UHV desorbs all water from the substrate leaving only the OH groups coordinated to Rh, and high-resolution ncAFM images provide a direct view into the internal structure. We provide direct evidence of the importance of OH ligands in the stability of single atoms and argue that their presence should be assumed when modeling single-atom catalysis systems.
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Affiliation(s)
- Florian Kraushofer
- Institute
of Applied Physics, TU Wien, Wiedner Hauptstraße 8-10/E134, 1040 Wien, Austria
| | - Lena Haager
- Institute
of Applied Physics, TU Wien, Wiedner Hauptstraße 8-10/E134, 1040 Wien, Austria
| | - Moritz Eder
- Chair
of Physical Chemistry & Catalysis Research Center, Technical University of Munich, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Ali Rafsanjani-Abbasi
- Institute
of Applied Physics, TU Wien, Wiedner Hauptstraße 8-10/E134, 1040 Wien, Austria
| | - Zdeněk Jakub
- Institute
of Applied Physics, TU Wien, Wiedner Hauptstraße 8-10/E134, 1040 Wien, Austria
| | - Giada Franceschi
- Institute
of Applied Physics, TU Wien, Wiedner Hauptstraße 8-10/E134, 1040 Wien, Austria
| | - Michele Riva
- Institute
of Applied Physics, TU Wien, Wiedner Hauptstraße 8-10/E134, 1040 Wien, Austria
| | - Matthias Meier
- Institute
of Applied Physics, TU Wien, Wiedner Hauptstraße 8-10/E134, 1040 Wien, Austria
| | - Michael Schmid
- Institute
of Applied Physics, TU Wien, Wiedner Hauptstraße 8-10/E134, 1040 Wien, Austria
| | - Ulrike Diebold
- Institute
of Applied Physics, TU Wien, Wiedner Hauptstraße 8-10/E134, 1040 Wien, Austria
| | - Gareth S. Parkinson
- Institute
of Applied Physics, TU Wien, Wiedner Hauptstraße 8-10/E134, 1040 Wien, Austria
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9
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Doudin N, Collinge G, Persaud RR, Gurunathan PK, Lee MS, Glezakou VA, Dixon DA, Rousseau R, Dohnálek Z. Binding and stability of MgO monomers on anatase TiO 2(101). J Chem Phys 2021; 154:204703. [PMID: 34241167 DOI: 10.1063/5.0047521] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In catalysis, MgO is often used to modify the acid-base properties of support oxides and to stabilize supported metal atoms and particles on oxides. In this study, we show how the sublimation of MgO powder can be used to deposit MgO monomers, hither on anatase TiO2(101). A combination of x-ray electron spectroscopy, high-resolution scanning tunneling microscopy, and density functional theory is employed to gain insight into the MgO monomer binding, electronic and vibrational properties, and thermal stability. In the most stable configuration, the Mg and O of the MgO monomer bind to two surface oxygens and one undercoordinated surface titanium, respectively. The additional binding weakens the Mg-O monomer bond and makes Mg more ionic. The monomers are thermally stable up to 600 K, where the onset of diffusion into the TiO2 bulk is observed. The monomeric MgO species on TiO2(101) represent an ideal atomically precise system with modified acid-base properties and will be employed in our future catalytic studies.
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Affiliation(s)
- Nassar Doudin
- Pacific Northwest National Laboratory, Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, P.O. Box 999, Richland, Washington 99352, USA
| | - Greg Collinge
- Pacific Northwest National Laboratory, Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, P.O. Box 999, Richland, Washington 99352, USA
| | - Rudradatt R Persaud
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487, USA
| | - Pradeep Kumar Gurunathan
- Pacific Northwest National Laboratory, Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, P.O. Box 999, Richland, Washington 99352, USA
| | - Mal-Soon Lee
- Pacific Northwest National Laboratory, Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, P.O. Box 999, Richland, Washington 99352, USA
| | - Vassiliki-Alexandra Glezakou
- Pacific Northwest National Laboratory, Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, P.O. Box 999, Richland, Washington 99352, USA
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487, USA
| | - Roger Rousseau
- Pacific Northwest National Laboratory, Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, P.O. Box 999, Richland, Washington 99352, USA
| | - Zdenek Dohnálek
- Pacific Northwest National Laboratory, Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, P.O. Box 999, Richland, Washington 99352, USA
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10
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Feng C, Liu X, Zhu T, Tian M. Catalytic oxidation of CO on noble metal-based catalysts. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:24847-24871. [PMID: 33763831 DOI: 10.1007/s11356-021-13008-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 02/12/2021] [Indexed: 06/12/2023]
Abstract
Carbon monoxide (CO) catalytic oxidation has gained increasing interest in recent years due to its application prospects. The noble metal catalysts commonly exhibit outstanding CO catalytic oxidation activity. Therefore, this article reviewed the recent research on the application of noble metal catalysts in the catalytic oxidation of CO. The effects of catalyst support, dopant, and physicochemical properties on the catalytic activity for CO oxidation are summarized. The influence of the presence of water vapor and sulfur dioxide in the reaction atmosphere on the catalytic activity in CO oxidation is emphatically discussed. Moreover, this paper discussed several reaction mechanisms of CO catalytic oxidation on noble metal catalysts. Finally, the challenges of removing CO by catalytic oxidation in practical industrial flue gas are proposed.
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Affiliation(s)
- Chenglin Feng
- School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, 550025, Guizhou, China
- Beijing Engineering Research Center of Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing, 100190, China
| | - Xiaolong Liu
- Beijing Engineering Research Center of Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing, 100190, China.
| | - Tingyu Zhu
- Beijing Engineering Research Center of Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing, 100190, China.
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.
| | - Mengkui Tian
- School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, 550025, Guizhou, China
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11
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Hulva J, Meier M, Bliem R, Jakub Z, Kraushofer F, Schmid M, Diebold U, Franchini C, Parkinson GS. Unraveling CO adsorption on model single-atom catalysts. Science 2021; 371:375-379. [PMID: 33479148 DOI: 10.1126/science.abe5757] [Citation(s) in RCA: 109] [Impact Index Per Article: 36.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 12/09/2020] [Indexed: 12/16/2022]
Abstract
Understanding how the local environment of a "single-atom" catalyst affects stability and reactivity remains a challenge. We present an in-depth study of copper1, silver1, gold1, nickel1, palladium1, platinum1, rhodium1, and iridium1 species on Fe3O4(001), a model support in which all metals occupy the same twofold-coordinated adsorption site upon deposition at room temperature. Surface science techniques revealed that CO adsorption strength at single metal sites differs from the respective metal surfaces and supported clusters. Charge transfer into the support modifies the d-states of the metal atom and the strength of the metal-CO bond. These effects could strengthen the bond (as for Ag1-CO) or weaken it (as for Ni1-CO), but CO-induced structural distortions reduce adsorption energies from those expected on the basis of electronic structure alone. The extent of the relaxations depends on the local geometry and could be predicted by analogy to coordination chemistry.
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Affiliation(s)
- Jan Hulva
- Institute of Applied Physics, TU Wien, Vienna, Austria
| | - Matthias Meier
- Institute of Applied Physics, TU Wien, Vienna, Austria.,Computational Materials Physics, University of Vienna, Vienna, Austria
| | - Roland Bliem
- Institute of Applied Physics, TU Wien, Vienna, Austria
| | - Zdenek Jakub
- Institute of Applied Physics, TU Wien, Vienna, Austria
| | | | | | | | - Cesare Franchini
- Computational Materials Physics, University of Vienna, Vienna, Austria.,Alma Mater Studiorum-Università di Bologna, Bologna, Italy
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12
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Babucci M, Guntida A, Gates BC. Atomically Dispersed Metals on Well-Defined Supports including Zeolites and Metal–Organic Frameworks: Structure, Bonding, Reactivity, and Catalysis. Chem Rev 2020; 120:11956-11985. [DOI: 10.1021/acs.chemrev.0c00864] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Melike Babucci
- Department of Chemical Engineering, University of California, Davis, California, 95616, United States
| | - Adisak Guntida
- Department of Chemical Engineering, University of California, Davis, California, 95616, United States
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Chulalongkorn University, Bangkok 10330, Thailand
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis, California, 95616, United States
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