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Adachi Y, Brndiar J, Konôpka M, Turanský R, Zhu Q, Wen HF, Sugawara Y, Kantorovich L, Štich I, Li YJ. Tip-activated single-atom catalysis: CO oxidation on Au adatom on oxidized rutile TiO 2 surface. Sci Adv 2023; 9:eadi4799. [PMID: 37756403 PMCID: PMC10530063 DOI: 10.1126/sciadv.adi4799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 08/25/2023] [Indexed: 09/29/2023]
Abstract
Single-atom catalysis of carbon monoxide oxidation on metal-oxide surfaces is crucial for greenhouse recycling, automotive catalysis, and beyond, but reports of the atomic-scale mechanism are still scarce. Here, using scanning probe microscopy, we show that charging single gold atoms on oxidized rutile titanium dioxide surface, both positively and negatively, considerably promotes adsorption of carbon monoxide. No carbon monoxide adsorption is observed on neutral gold atoms. Two different carbon monoxide adsorption geometries on gold atoms are identified. We demonstrate full control over the redox state of adsorbed gold single atoms, carbon monoxide adsorption geometry, and carbon monoxide adsorption/desorption by the atomic force microscopy tip. On charged gold atoms, we activate Eley-Rideal oxidation reaction between carbon monoxide and a neighboring oxygen adatom by the tip. Our results provide unprecedented insights into carbon monoxide adsorption and suggest that the gold dual activity for carbon monoxide oxidation after electron or hole attachment is also the key ingredient in photocatalysis under realistic conditions.
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Affiliation(s)
- Yuuki Adachi
- Department of Applied Physics, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Ján Brndiar
- Institute of Informatics, Slovak Academy of Sciences, 845 07 Bratislava, Slovakia
| | - Martin Konôpka
- Faculty of Electrical Engineering and Information Technology, Institute of Nuclear and Physical Engineering, Slovak University of Technology in Bratislava, 812 19 Bratislava, Slovakia
| | - Robert Turanský
- Institute of Physics, Slovak Academy of Sciences, 845 11 Bratislava, Slovakia
| | - Qiang Zhu
- Department of Applied Physics, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Huan Fei Wen
- Key Laboratory of Instrumentation Science and Dynamic Measurement, School of Instrument and Electronics, North University of China, Taiyuan, Shanxi 030051, China
| | - Yasuhiro Sugawara
- Department of Applied Physics, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Lev Kantorovich
- Department of Physics, School of Natural and Mathematical Sciences, King’s College London, The Strand, London WC2R 2LS, UK
| | - Ivan Štich
- Institute of Informatics, Slovak Academy of Sciences, 845 07 Bratislava, Slovakia
- Institute of Physics, Slovak Academy of Sciences, 845 11 Bratislava, Slovakia
- Faculty of Natural Sciences, University of Ss. Cyril and Methodius, 917 01 Trnava, Slovakia
| | - Yan Jun Li
- Department of Applied Physics, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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Turanský R, Palotás K, Brndiar J, Li YJ, Sugawara Y, Štich I. Subatomic-scale resolution with SPM: Co adatom on p(2 × 1)Cu(110):O. Nanotechnology 2019; 30:095703. [PMID: 30523887 DOI: 10.1088/1361-6528/aaf6dc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We study the limits of SPM subatomic resolution in imaging orbital magnetic features on a model system of a Co atom on a p(2 × 1)Cu(110):O surface. We show that scanning tunneling spectroscopies allow the determination of the occupation of the Co d shells and the value of the Hubbard U in the DFT + U modeling, and that standard near-contact AFM can in principle image the asymmetry due to partial filling of the d shells at close distances in the small-amplitude regime. Due to the partially ionic character of Co, a faint asymmetry is predicted to also arise in the electrostatic force. We anticipate these features to be even stronger for a transition metal adsorbate featuring larger departures from sphericality in charge/spin densities.
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Affiliation(s)
- R Turanský
- Center for Comp. Mat. Science, Inst. of Physics, Slovak Acad. of Sciences, 84511 Bratislava, Slovakia
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Kinoshita Y, Turanský R, Brndiar J, Naitoh Y, Li YJ, Kantorovich L, Sugawara Y, Štich I. Promoting Atoms into Delocalized Long-Living Magnetically Modified State Using Atomic Force Microscopy. Nano Lett 2016; 16:7490-7494. [PMID: 27786489 DOI: 10.1021/acs.nanolett.6b03203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report on a low-temperature atomic force microscropy manipulation of Co atoms in ultrahigh vacuum on an oxidized copper surface in which the manipulated atom is kept delocalized above several surface unit cells over macroscopic times. The manipulation employed, in addition to the ubiquitous short-range tip-generated chemical forces, also long-range forces generated via Friedel oscillations of the metal charge density due to Co nanostructures prearranged on the surface by lateral manipulation. We show that our manipulation protocol requires mechanical control of the spin state of the Co atom.
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Affiliation(s)
- Y Kinoshita
- Department of Applied Physics, Osaka University , 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - R Turanský
- Institute of Physics, CCMS, Slovak Academy of Sciences , Dúbravská cesta 9, 845 11 Bratislava 45, Slovakia
| | - J Brndiar
- Institute of Physics, CCMS, Slovak Academy of Sciences , Dúbravská cesta 9, 845 11 Bratislava 45, Slovakia
| | - Y Naitoh
- Department of Applied Physics, Osaka University , 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Y J Li
- Department of Applied Physics, Osaka University , 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - L Kantorovich
- Department of Physics, Strand, King's College London , London, WC2R 2LS, United Kingdom
| | - Y Sugawara
- Department of Applied Physics, Osaka University , 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - I Štich
- Institute of Physics, CCMS, Slovak Academy of Sciences , Dúbravská cesta 9, 845 11 Bratislava 45, Slovakia
- Ruprecht A. Institute of Technology, Dubová 2243/11, Šamorín, Slovakia
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Bamidele J, Lee S, Kinoshita Y, Turanský R, Naitoh Y, Li Y, Sugawara Y, Štich I, Kantorovich L. Vertical atomic manipulation with dynamic atomic-force microscopy without tip change via a multi-step mechanism. Nat Commun 2014; 5:4476. [DOI: 10.1038/ncomms5476] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Accepted: 06/20/2014] [Indexed: 11/09/2022] Open
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Such B, Glatzel T, Kawai S, Meyer E, Turanský R, Brndiar J, Stich I. Interplay of the tip-sample junction stability and image contrast reversal on a Cu(111) surface revealed by the 3D force field. Nanotechnology 2012; 23:045705. [PMID: 22222632 DOI: 10.1088/0957-4484/23/4/045705] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Non-contact atomic force microscopy is used to measure the 3D force field on a dense-packed Cu(111) surface. An unexpected image contrast reversal is observed as the tip is moved towards the surface, with atoms appearing first as bright spots, whereas hollow and bridge sites turn bright at smaller tip-sample distances. Computer modeling is used to elucidate the nature of the image contrast. We find that the contrast reversal is essentially a geometrical effect, which, unlike in gold, is observable in Cu due to an unusually large stability of the tip-sample junction over large distances.
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Affiliation(s)
- Bartosz Such
- Centre for Nanometer-Scale Science and Advanced Materials (NANOSAM), Jagiellonian University, Krakow, Poland.
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Brndiar J, Turanský R, Dietzel D, Schirmeisen A, Stich I. Understanding frictional duality and bi-duality: Sb-nanoparticles on HOPG. Nanotechnology 2011; 22:085704. [PMID: 21242616 DOI: 10.1088/0957-4484/22/8/085704] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Antimony nanoparticles deposited under UHV conditions on HOPG are found to exhibit an intriguing frictional behavior characterized by a distinct clearly separated double dual behavior of dependence of the frictional force on contact area. We present the first realistic simulations, density functional modeling adapted to accommodate van der Waals interactions, of the (double) dual frictional behavior. The simulations provide insights into the physics/chemistry of all the frictional branches in terms of incommensurable interfaces, mobile spacer molecules as well as a novel concept of mobile oxidized multi-nanoasperities.
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Affiliation(s)
- Ján Brndiar
- Center for Computational Materials Science, Institute of Physics, Slovak Academy of Sciences, Bratislava, Slovakia
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Turanský R, Konôpka M, Doltsinis NL, Štich I, Marx D. Cover Picture: Optical, Mechanical, and Opto-Mechanical Switching of Anchored Dithioazobenzene Bridges (ChemPhysChem 2/2010). Chemphyschem 2010. [DOI: 10.1002/cphc.201090005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Turanský R, Konôpka M, Doltsinis NL, Štich I, Marx D. Switching of functionalized azobenzene suspended between gold tips by mechanochemical, photochemical, and opto-mechanical means. Phys Chem Chem Phys 2010; 12:13922-32. [DOI: 10.1039/c0cp00588f] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Konôpka M, Turanský R, Reichert J, Fuchs H, Marx D, Stich I. Mechanochemistry and thermochemistry are different: stress-induced strengthening of chemical bonds. Phys Rev Lett 2008; 100:115503. [PMID: 18517794 DOI: 10.1103/physrevlett.100.115503] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2007] [Indexed: 05/26/2023]
Abstract
Most chemical reactions require activation which is conventionally supplied by heat. In stark contrast, mechanical activation by applied external forces opens intriguing novel possibilities. Here, the first direct comparison of mechanical versus thermal activation of bond breaking is provided. Studying both thiolate-copper interfaces and junctions provides evidence for vastly different reaction pathways and product classes. This is understood in terms of directional mechanical manipulation of coordination numbers and system fluctuations in the process of mechanical activation.
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Affiliation(s)
- Martin Konôpka
- Center for Computational Materials Science, Slovak University of Technology (FEI STU), 81219 Bratislava, Slovakia
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