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In-silico study of the adsorption of H2, CO and CO2 chemical species on (TiO2)n n=15–20 clusters: The (TiO2)19 case as candidate promising. J Mol Graph Model 2022; 117:108316. [DOI: 10.1016/j.jmgm.2022.108316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 08/14/2022] [Accepted: 08/21/2022] [Indexed: 11/23/2022]
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Soszka E, Jędrzejczyk M, Lefevre C, Ihiawakrim D, Keller N, Ruppert AM. TiO2 supported Co catalysts for the hydrogenation of γ-valerolactone to 2-methyltetrahydrofuran: influence of the support. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01044e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
2-Methyltetrahydrofuran (MTHF) is considered as one of the most promising green fuel alternatives that could be obtained from renewable lignocellulosic biomass through the catalytic hydrogenation of the γ-valerolactone (GVL) platform...
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Lustemberg PG, Plessow PN, Wang Y, Yang C, Nefedov A, Studt F, Wöll C, Ganduglia-Pirovano MV. Vibrational Frequencies of Cerium-Oxide-Bound CO: A Challenge for Conventional DFT Methods. PHYSICAL REVIEW LETTERS 2020; 125:256101. [PMID: 33416353 DOI: 10.1103/physrevlett.125.256101] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 09/04/2020] [Accepted: 11/09/2020] [Indexed: 06/12/2023]
Abstract
In ceria-based catalysis, the shape of the catalyst particle, which determines the exposed crystal facets, profoundly affects its reactivity. The vibrational frequency of adsorbed carbon monoxide (CO) can be used as a sensitive probe to identify the exposed surface facets, provided reference data on well-defined single crystal surfaces together with a definitive theoretical assignment exist. We investigate the adsorption of CO on the CeO_{2}(110) and (111) surfaces and show that the commonly applied DFT(PBE)+U method does not provide reliable CO vibrational frequencies by comparing with state-of-the-art infrared spectroscopy experiments for monocrystalline CeO_{2} surfaces. Good agreement requires the hybrid DFT approach with the HSE06 functional. The failure of conventional density-functional theory (DFT) is explained in terms of its inability to accurately describe the facet- and configuration-specific donation and backdonation effects that control the changes in the C─O bond length upon CO adsorption and the CO force constant. Our findings thus provide a theoretical basis for the detailed interpretation of experiments and open up the path to characterize more complex scenarios, including oxygen vacancies and metal adatoms.
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Affiliation(s)
- Pablo G Lustemberg
- Institute of Physics Rosario, IFIR, National Scientific and Technical Research Council, CONICET, and National University of Rosario, UNR, S2000EKF Rosario, Santa Fe, Argentina
- Institute of Catalysis and Petrochemistry, ICP, Spanish National Research Council, CSIC, 28049 Madrid, Spain
| | - Philipp N Plessow
- Institute of Catalysis Research and Technology, IKFT, Karlsruhe Institute of Technology, KIT, 76344 Eggenstein-Leopoldshafen, Germany
| | - Yuemin Wang
- Institute for Chemical Technology and Polymer Chemistry, ITCP, Karlsruhe Institute of Technology, KIT, Karlsruhe 76131, Germany
| | - Chengwu Yang
- Institute for Chemical Technology and Polymer Chemistry, ITCP, Karlsruhe Institute of Technology, KIT, Karlsruhe 76131, Germany
| | - Alexei Nefedov
- Institute for Chemical Technology and Polymer Chemistry, ITCP, Karlsruhe Institute of Technology, KIT, Karlsruhe 76131, Germany
| | - Felix Studt
- Institute of Catalysis Research and Technology, IKFT, Karlsruhe Institute of Technology, KIT, 76344 Eggenstein-Leopoldshafen, Germany
- Institute for Chemical Technology and Polymer Chemistry, ITCP, Karlsruhe Institute of Technology, KIT, Karlsruhe 76131, Germany
| | - Christof Wöll
- Institute of Functional Interfaces, IFG, Karlsruhe Institute of Technology, KIT, 76344 Eggenstein-Leopoldshafen, Germany
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Cazzaniga M, Micciarelli M, Moriggi F, Mahmoud A, Gabas F, Ceotto M. Anharmonic calculations of vibrational spectra for molecular adsorbates: A divide-and-conquer semiclassical molecular dynamics approach. J Chem Phys 2020; 152:104104. [PMID: 32171221 DOI: 10.1063/1.5142682] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The vibrational spectroscopy of adsorbates is becoming an important investigation tool for catalysis and material science. This paper presents a semiclassical molecular dynamics method able to reproduce the vibrational energy levels of systems composed by molecules adsorbed on solid surfaces. Specifically, we extend our divide-and-conquer semiclassical method for power spectra calculations to gas-surface systems and interface it with plane-wave electronic structure codes. The Born-Oppenheimer classical dynamics underlying the semiclassical calculation is full dimensional, and our method includes not only the motion of the adsorbate but also those of the surface and the bulk. The vibrational spectroscopic peaks related to the adsorbate are accounted together with the most coupled phonon modes to obtain spectra amenable to physical interpretations. We apply the method to the adsorption of CO, NO, and H2O on the anatase-TiO2 (101) surface. We compare our semiclassical results with the single-point harmonic estimates and the classical power spectra obtained from the same trajectory employed in the semiclassical calculation. We find that CO and NO anharmonic effects of fundamental vibrations are similarly reproduced by the classical and semiclassical dynamics and that H2O adsorption is fully and properly described in its overtone and combination band relevant components only by the semiclassical approach.
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Affiliation(s)
- Marco Cazzaniga
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
| | - Marco Micciarelli
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
| | - Francesco Moriggi
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
| | - Agnes Mahmoud
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
| | - Fabio Gabas
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
| | - Michele Ceotto
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
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Lee I, Zaera F. Effect of metal nanoparticle size and titania crystallinity on the performance of Au/TiO2 catalysts for the promotion of carbon monoxide oxidation at cryogenic temperatures. J Chem Phys 2019. [DOI: 10.1063/1.5114928] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Ilkeun Lee
- Department of Chemistry and UCR Center for Catalysis, University of California, Riverside, California 92521, USA
| | - Francisco Zaera
- Department of Chemistry and UCR Center for Catalysis, University of California, Riverside, California 92521, USA
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Tabacchi G, Fabbiani M, Mino L, Martra G, Fois E. The Case of Formic Acid on Anatase TiO 2 (101): Where is the Acid Proton? Angew Chem Int Ed Engl 2019; 58:12431-12434. [PMID: 31310450 DOI: 10.1002/anie.201906709] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Indexed: 01/20/2023]
Abstract
Carboxylic-acid adsorption on anatase TiO2 is a relevant process in many technological applications. Yet, despite several decades of investigations, the acid-proton localization-either on the molecule or on the surface-is still an open issue. By modeling the adsorption of formic acid on top of anatase(101) surfaces, we highlight the formation of a short strong hydrogen bond. In the 0 K limit, the acid-proton behavior is ruled by quantum delocalization effects in a single potential well, while at ambient conditions, the proton undergoes a rapid classical shuttling in a shallow two-well free-energy profile. This picture, supported by agreement with available experiments, shows that the anatase surface acts like a protecting group for the carboxylic acid functionality. Such a new conceptual insight might help rationalize chemical processes involving carboxylic acids on oxide surfaces.
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Affiliation(s)
- Gloria Tabacchi
- Department of Science and High Technology, University of Insubria and INSTM, via Valleggio 9, I-22100, Como, Italy
| | - Marco Fabbiani
- Department of Chemistry and Nanostructured Interfaces and Surfaces NIS interdepartmental centre, University of Torino, via P. Giuria 7, I-10125, Torino, Italy
| | - Lorenzo Mino
- Department of Chemistry and Nanostructured Interfaces and Surfaces NIS interdepartmental centre, University of Torino, via P. Giuria 7, I-10125, Torino, Italy
| | - Gianmario Martra
- Department of Chemistry and Nanostructured Interfaces and Surfaces NIS interdepartmental centre, University of Torino, via P. Giuria 7, I-10125, Torino, Italy
| | - Ettore Fois
- Department of Science and High Technology, University of Insubria and INSTM, via Valleggio 9, I-22100, Como, Italy
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Tabacchi G, Fabbiani M, Mino L, Martra G, Fois E. The Case of Formic Acid on Anatase TiO
2
(101): Where is the Acid Proton? Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906709] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Gloria Tabacchi
- Department of Science and High TechnologyUniversity of Insubria and INSTM via Valleggio 9 I-22100 Como Italy
| | - Marco Fabbiani
- Department of Chemistry and Nanostructured Interfaces and Surfaces NIS interdepartmental centreUniversity of Torino via P. Giuria 7 I-10125 Torino Italy
| | - Lorenzo Mino
- Department of Chemistry and Nanostructured Interfaces and Surfaces NIS interdepartmental centreUniversity of Torino via P. Giuria 7 I-10125 Torino Italy
| | - Gianmario Martra
- Department of Chemistry and Nanostructured Interfaces and Surfaces NIS interdepartmental centreUniversity of Torino via P. Giuria 7 I-10125 Torino Italy
| | - Ettore Fois
- Department of Science and High TechnologyUniversity of Insubria and INSTM via Valleggio 9 I-22100 Como Italy
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Abstract
Abstract
Confinement of molecules in one dimensional arrays of channel-shaped cavities has led to technologically interesting materials. However, the interactions governing the supramolecular aggregates still remain obscure, even for the most common guest molecule: water. Herein, we use computational chemistry methods (#compchem) to study the water organization inside two different channel-type environments: zeolite L – a widely used matrix for inclusion of dye molecules, and ZLMOF – the closest metal-organic-framework mimic of zeolite L. In ZLMOF, the methyl groups of the ligands protrude inside the channels, creating nearly isolated nanocavities. These cavities host well-separated ring-shaped clusters of water molecules, dominated mainly by water-water hydrogen bonds. ZLMOF provides arrays of “isolated supramolecule” environments, which might be exploited for the individual confinement of small species with interesting optical or catalytic properties. In contrast, the one dimensional channels of zeolite L contain a continuous supramolecular structure, governed by the water interactions with potassium cations and by water-water hydrogen bonds. Water imparts a significant energetic stabilization to both materials, which increases with the water content in ZLMOF and follows the opposite trend in zeolite L. The water network in zeolite L contains an intriguing hypercoordinated structure, where a water molecule is surrounded by five strong hydrogen bonds. Such a structure, here described for the first time in zeolites, can be considered as a water pre-dissociation complex and might explain the experimentally detected high proton activity in zeolite L nanochannels.
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Affiliation(s)
- Ettore Fois
- Department of Science and High Technology and INSTM , Università degli Studi dell’Insubria , Via Valleggio 11 , I-22100 Como , Italy
| | - Gloria Tabacchi
- Department of Science and High Technology and INSTM , Università degli Studi dell’Insubria , Via Valleggio 11 , I-22100 Como , Italy
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Cravanzola S, Sarro M, Cesano F, Calza P, Scarano D. Few-Layer MoS₂ Nanodomains Decorating TiO₂ Nanoparticles: A Case Study for the Photodegradation of Carbamazepine. NANOMATERIALS 2018; 8:nano8040207. [PMID: 29596373 PMCID: PMC5923537 DOI: 10.3390/nano8040207] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 03/24/2018] [Accepted: 03/27/2018] [Indexed: 01/17/2023]
Abstract
S-doped TiO2 and hybrid MoS2/TiO2 systems have been synthesized, via the sulfidation with H2S of the bare TiO2 and of MoOx supported on TiO2 systems, with the aim of enhancing the photocatalytic properties of TiO2 for the degradation of carbamazepine, an anticonvulsant drug, whose residues and metabolites are usually inefficiently removed in wastewater treatment plants. The focus of this study is to find a relationship between the morphology/structure/surface properties and photoactivity. The full characterization of samples reveals the strong effects of the H2S action on the properties of TiO2, with the formation of defects at the surface, as shown by transmission electron microscopy (TEM) and infrared spectroscopy (IR), while also the optical properties are strongly affected by the sulfidation treatment, with changes in the electronic states of TiO2. Meanwhile, the formation of small and thin few-layer MoS2 domains, decorating the TiO2 surface, is evidenced by both high-resolution transmission electron microscopy (HRTEM) and UV-Vis/Raman spectroscopies, while Fourier-transform infrared (FTIR) spectra give insights into the nature of Ti and Mo surface sites. The most interesting findings of our research are the enhanced photoactivity of the MoS2/TiO2 hybrid photocatalyst toward the carbamazepine mineralization. Surprisingly, the formation of hazardous compounds (i.e., acridine derivatives), usually obtained from carbamazepine, is precluded when treated with MoS2/TiO2 systems.
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Affiliation(s)
- Sara Cravanzola
- Department of Chemistry, NIS (Nanostructured Interfaces and Surfaces) Inter-Departmental Centre and INSTM Centro di Riferimento, University of Torino, Via P. Giuria, 7, 10125 Torino, Italy.
| | - Marco Sarro
- Department of Chemistry, NIS (Nanostructured Interfaces and Surfaces) Inter-Departmental Centre and INSTM Centro di Riferimento, University of Torino, Via P. Giuria, 7, 10125 Torino, Italy.
| | - Federico Cesano
- Department of Chemistry, NIS (Nanostructured Interfaces and Surfaces) Inter-Departmental Centre and INSTM Centro di Riferimento, University of Torino, Via P. Giuria, 7, 10125 Torino, Italy.
| | - Paola Calza
- Department of Chemistry, NIS (Nanostructured Interfaces and Surfaces) Inter-Departmental Centre and INSTM Centro di Riferimento, University of Torino, Via P. Giuria, 7, 10125 Torino, Italy.
| | - Domenica Scarano
- Department of Chemistry, NIS (Nanostructured Interfaces and Surfaces) Inter-Departmental Centre and INSTM Centro di Riferimento, University of Torino, Via P. Giuria, 7, 10125 Torino, Italy.
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Marucco A, Pellegrino F, Oliaro-Bosso S, Maurino V, Martra G, Fenoglio I. Indoor illumination: A possible pitfall in toxicological assessment of photo-active nanomaterials. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.08.072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Shiraishi Y, Yasumoto N, Imai J, Sakamoto H, Tanaka S, Ichikawa S, Ohtani B, Hirai T. Quantum tunneling injection of hot electrons in Au/TiO 2 plasmonic photocatalysts. NANOSCALE 2017; 9:8349-8361. [PMID: 28594044 DOI: 10.1039/c7nr02310c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Visible light absorption of plasmonic Au nanoparticles supported on semiconductor TiO2 leads to injection of their photoactivated "hot electrons (ehot-)" into the TiO2 conduction band. This charge separation facilitates several oxidation and reduction reactions. These plasmonic systems, however, suffer from low quantum yields because the Schottky barrier created at the Au-TiO2 interface suppresses ehot- injection. Here we report that Au nanoparticles supported on the anatase particles isolated from Degussa (Evonik) P25 TiO2 promote ehot- injection with much higher efficiency than those supported on other commercially-available TiO2 and catalyze aerobic oxidation with very high quantum yield (7.7% at 550 nm). Photoelectrochemical and spectroscopic analysis revealed that the number of Ti4+ atoms located at the Au-TiO2 interface is the crucial factor. These Ti4+ atoms neutralize the negative charge of the Au particles and create a Schottky barrier with narrower depletion layer. This facilitates efficient ehot- injection by "quantum tunneling" through the Schottky barrier without overbarrier energy. The ehot- injection depends on several factors, and loading of 2 wt% Au particles with 3.5-4 nm diameters at around room temperature exhibits the highest activity of plasmonic photocatalysis.
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Affiliation(s)
- Yasuhiro Shiraishi
- Research Center for Solar Energy Chemistry, and Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan.
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Borghetti P, Meriggio E, Rousse G, Cabailh G, Lazzari R, Jupille J. Photoemission Fingerprints for Structural Identification of Titanium Dioxide Surfaces. J Phys Chem Lett 2016; 7:3223-3228. [PMID: 27453254 DOI: 10.1021/acs.jpclett.6b01301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The wealth of properties of titanium dioxide relies on its various polymorphs and on their mixtures coupled with a sensitivity to crystallographic orientations. It is therefore pivotal to set out methods that allow surface structural identification. We demonstrate herein the ability of photoemission spectroscopy to provide Ti LMV (V = valence) Auger templates to quantitatively analyze TiO2 polymorphs. The Ti LMV decay reflects Ti 4sp-O 2p hybridizations that are intrinsic properties of TiO2 phases and orientations. Ti LMV templates collected on rutile (110), anatase (101), and (100) single crystals allow for the quantitative analysis of mixed nanosized powders, which bridges the gap between surfaces of reference and complex materials. As a test bed, the anatase/rutile P25 is studied both as received and during the anatase-to-rutile transformation upon annealing. The agreement with X-ray diffraction measurements proves the reliability of the Auger analysis and highlights its ability to detect surface orientations.
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Affiliation(s)
- Patrizia Borghetti
- Sorbonne Universités, UPMC Univ Paris 06, CNRS-UMR 7588, Institut des NanoSciences de Paris, F-75005, Paris, France
| | - Elisa Meriggio
- Sorbonne Universités, UPMC Univ Paris 06, CNRS-UMR 7588, Institut des NanoSciences de Paris, F-75005, Paris, France
- Dipartimento di Fisica, Università di Genova , Via Dodecaneso 33, 16146 Genova, Italy
| | - Gwenaëlle Rousse
- Chimie du Solide et de l'Energie, Collège de France, Sorbonne Universités , UPMC Univ Paris 06, 11, Place Marcelin Berthelot, 75231 Paris, France
| | - Gregory Cabailh
- Sorbonne Universités, UPMC Univ Paris 06, CNRS-UMR 7588, Institut des NanoSciences de Paris, F-75005, Paris, France
| | - Rémi Lazzari
- Sorbonne Universités, UPMC Univ Paris 06, CNRS-UMR 7588, Institut des NanoSciences de Paris, F-75005, Paris, France
| | - Jacques Jupille
- Sorbonne Universités, UPMC Univ Paris 06, CNRS-UMR 7588, Institut des NanoSciences de Paris, F-75005, Paris, France
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