1
|
Marzouk A, Papavasileiou KD, Peristeras LD, Bezemer L, van Bavel AP, Shenai PM, Economou IG. A systematic DFT study of structure and electronic properties of titanium dioxide. J Comput Chem 2024. [PMID: 38785277 DOI: 10.1002/jcc.27376] [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: 01/28/2024] [Revised: 04/02/2024] [Accepted: 04/08/2024] [Indexed: 05/25/2024]
Abstract
DFT functionals are of paramount importance for an accurate electronic and structural description of transition metal systems. In this work, a systematic analysis using some well-known and commonly used DFT functionals is performed. A comparison of the structural and energetic parameters calculated with the available experimental data is made in order to find the adequate functional for an accurate description of the TiO2 bulk and surface of both anatase and rutile structures. In the absence of experimental data on the surface energy, the theoretical predictions obtained using the high-accuracy HSE06 functional were used as a reference to compare against the surface energy values calculated with the other DFT functionals. A clear improvement in the electronic description of both anatase and rutile was observed by introducing the Hubbard U correction term to PBE, PW91, and OptPBE functionals. The OptPBE-U4 functional was found to offer a good compromise between accurately describing the structural and electronic properties of titania.
Collapse
Affiliation(s)
- Asma Marzouk
- Chemical Engineering Program, Texas A&M University at Qatar, Doha, Qatar
| | - Konstantinos D Papavasileiou
- Molecular Thermodynamics and Modelling of Materials Laboratory, National Center for Scientific Research "Demokritos", Institute of Nanoscience and Nanotechnology, Athens, Greece
| | - Loukas D Peristeras
- Molecular Thermodynamics and Modelling of Materials Laboratory, National Center for Scientific Research "Demokritos", Institute of Nanoscience and Nanotechnology, Athens, Greece
| | - Leendert Bezemer
- GTL and XTL Research, Shell Global Solutions International BV, Amsterdam, The Netherlands
| | - Alexander P van Bavel
- Next Generation Breakthrough Research, Shell Global Solutions International BV, Amsterdam, The Netherlands
| | - Prathamesh M Shenai
- Computational Chemistry and Material Science, Shell India Markets Pvt. Ltd, Shell India Markets Pvt. Ltd, Banglore, India
| | - Ioannis G Economou
- Chemical Engineering Program, Texas A&M University at Qatar, Doha, Qatar
| |
Collapse
|
2
|
Dumortier L, Chizallet C, Creton B, de Bruin T, Verstraelen T. Managing Expectations and Imbalanced Training Data in Reactive Force Field Development: An Application to Water Adsorption on Alumina. J Chem Theory Comput 2024; 20:3779-3797. [PMID: 38639642 DOI: 10.1021/acs.jctc.3c01009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
ReaxFF is a computationally efficient model for reactive molecular dynamics simulations that has been applied to a wide variety of chemical systems. When ReaxFF parameters are not yet available for a chemistry of interest, they must be (re)optimized, for which one defines a set of training data that the new ReaxFF parameters should reproduce. ReaxFF training sets typically contain diverse properties with different units, some of which are more abundant (by orders of magnitude) than others. To find the best parameters, one conventionally minimizes a weighted sum of squared errors over all of the data in the training set. One of the challenges in such numerical optimizations is to assign weights so that the optimized parameters represent a good compromise among all the requirements defined in the training set. This work introduces a new loss function, called Balanced Loss, and a workflow that replaces weight assignment with a more manageable procedure. The training data are divided into categories with corresponding "tolerances", i.e., acceptable root-mean-square errors for the categories, which define the expectations for the optimized ReaxFF parameters. Through the Log-Sum-Exp form of Balanced Loss, the parameter optimization is also a validation of one's expectations, providing meaningful feedback that can be used to reconfigure the tolerances if needed. The new methodology is demonstrated with a nontrivial parametrization of ReaxFF for water adsorption on alumina. This results in a new force field that reproduces both the rare and frequent properties of a validation set not used for training. We also demonstrate the robustness of the new force field with a molecular dynamics simulation of water desorption from a γ-Al2O3 slab model.
Collapse
Affiliation(s)
- Loïc Dumortier
- IFP Energies nouvelles, 1 et 4 Avenue de Bois-Préau, 92852 Rueil-Malmaison, France
- Center for Molecular Modeling (CMM), Ghent University, Technologiepark-Zwijnaarde 46, Zwijnaarde, B-9052 Ghent, Belgium
| | - Céline Chizallet
- IFP Energies nouvelles, Rond-point de l'échangeur de Solaize, BP3, 69360 Solaize, France
| | - Benoit Creton
- IFP Energies nouvelles, 1 et 4 Avenue de Bois-Préau, 92852 Rueil-Malmaison, France
| | - Theodorus de Bruin
- IFP Energies nouvelles, 1 et 4 Avenue de Bois-Préau, 92852 Rueil-Malmaison, France
| | - Toon Verstraelen
- Center for Molecular Modeling (CMM), Ghent University, Technologiepark-Zwijnaarde 46, Zwijnaarde, B-9052 Ghent, Belgium
| |
Collapse
|
3
|
Yasumura S, Kamachi T, Toyao T, Shimizu KI, Hinuma Y. Prediction of Stable Surfaces of Metal Oxides through the Unsaturated Coordination Index. ACS OMEGA 2023; 8:29779-29788. [PMID: 37599947 PMCID: PMC10433516 DOI: 10.1021/acsomega.3c04253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 07/10/2023] [Indexed: 08/22/2023]
Abstract
This study proposes the unsaturated coordination index, σ, as a potential descriptor of the stability of metal-oxide surfaces cleaved from bulk. The value of σ, the number of missing bonds per unit area, can be obtained very quickly using only crystallographic data, namely, the bulk geometry. The surface energies of various binary oxides, with and without atom relaxation, were calculated. Their correlations with σ had good coefficients of determination (R2) values, particularly in high-symmetry crystals. The proposed descriptor is very useful for an initial evaluation of stable metal-oxide surfaces without conducting any surface model calculations.
Collapse
Affiliation(s)
- Shunsaku Yasumura
- Institute
of Industrial Science, The University of
Tokyo, Komaba 4-6-1, Meguro, Tokyo 153-8505, Japan
| | - Takashi Kamachi
- Department
of Life, Environment and Applied Chemistry, Fukuoka Institute of Technology, 3-30-1 Wajiro-Higashi, Higashi-ku, Fukuoka 811-0295, Japan
| | - Takashi Toyao
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Kita, Sapporo 001-0021, Hokkaido, Japan
| | - Ken-ichi Shimizu
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Kita, Sapporo 001-0021, Hokkaido, Japan
| | - Yoyo Hinuma
- Department
of Energy and Environment, National Institute
of Advanced Industrial Science and Technology (AIST), 1-8-31, Midorigaoka, Ikeda 563-8577, Osaka, Japan
| |
Collapse
|
4
|
Pavan C, Santalucia R, Escolano-Casado G, Ugliengo P, Mino L, Turci F. Physico-Chemical Approaches to Investigate Surface Hydroxyls as Determinants of Molecular Initiating Events in Oxide Particle Toxicity. Int J Mol Sci 2023; 24:11482. [PMID: 37511241 PMCID: PMC10380507 DOI: 10.3390/ijms241411482] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 07/04/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
The study of molecular recognition patterns is crucial for understanding the interactions between inorganic (nano)particles and biomolecules. In this review we focus on hydroxyls (OH) exposed at the surface of oxide particles (OxPs) which can play a key role in molecular initiating events leading to OxPs toxicity. We discuss here the main analytical methods available to characterize surface OH from a quantitative and qualitative point of view, covering thermogravimetry, titration, ζ potential measurements, and spectroscopic approaches (NMR, XPS). The importance of modelling techniques (MD, DFT) for an atomistic description of the interactions between membranes/proteins and OxPs surfaces is also discussed. From this background, we distilled a new approach methodology (NAM) based on the combination of IR spectroscopy and bioanalytical assays to investigate the molecular interactions of OxPs with biomolecules and membranes. This NAM has been already successfully applied to SiO2 particles to identify the OH patterns responsible for the OxPs' toxicity and can be conceivably extended to other surface-hydroxylated oxides.
Collapse
Affiliation(s)
- Cristina Pavan
- Department of Chemistry, University of Torino, Via Giuria 7, 10125 Torino, Italy
- "G. Scansetti" Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, University of Torino, 10125 Torino, Italy
- Louvain Centre for Toxicology and Applied Pharmacology, Université Catholique de Louvain, 1200 Brussels, Belgium
| | - Rosangela Santalucia
- Department of Chemistry, University of Torino, Via Giuria 7, 10125 Torino, Italy
- Nanostructured Interfaces and Surfaces (NIS) Interdepartmental Centre, University of Torino, 10125 Torino, Italy
| | - Guillermo Escolano-Casado
- Department of Chemistry, University of Torino, Via Giuria 7, 10125 Torino, Italy
- Nanostructured Interfaces and Surfaces (NIS) Interdepartmental Centre, University of Torino, 10125 Torino, Italy
| | - Piero Ugliengo
- Department of Chemistry, University of Torino, Via Giuria 7, 10125 Torino, Italy
- Nanostructured Interfaces and Surfaces (NIS) Interdepartmental Centre, University of Torino, 10125 Torino, Italy
| | - Lorenzo Mino
- Department of Chemistry, University of Torino, Via Giuria 7, 10125 Torino, Italy
- Nanostructured Interfaces and Surfaces (NIS) Interdepartmental Centre, University of Torino, 10125 Torino, Italy
| | - Francesco Turci
- Department of Chemistry, University of Torino, Via Giuria 7, 10125 Torino, Italy
- "G. Scansetti" Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, University of Torino, 10125 Torino, Italy
- Nanostructured Interfaces and Surfaces (NIS) Interdepartmental Centre, University of Torino, 10125 Torino, Italy
| |
Collapse
|
5
|
Monai M, Jenkinson K, Melcherts AEM, Louwen JN, Irmak EA, Van Aert S, Altantzis T, Vogt C, van der Stam W, Duchoň T, Šmíd B, Groeneveld E, Berben P, Bals S, Weckhuysen BM. Restructuring of titanium oxide overlayers over nickel nanoparticles during catalysis. Science 2023; 380:644-651. [PMID: 37167405 DOI: 10.1126/science.adf6984] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Reducible supports can affect the performance of metal catalysts by the formation of suboxide overlayers upon reduction, a process referred to as the strong metal-support interaction (SMSI). A combination of operando electron microscopy and vibrational spectroscopy revealed that thin TiOx overlayers formed on nickel/titanium dioxide catalysts during 400°C reduction were completely removed under carbon dioxide hydrogenation conditions. Conversely, after 600°C reduction, exposure to carbon dioxide hydrogenation reaction conditions led to only partial reexposure of nickel, forming interfacial sites in contact with TiOx and favoring carbon-carbon coupling by providing a carbon species reservoir. Our findings challenge the conventional understanding of SMSIs and call for more-detailed operando investigations of nanocatalysts at the single-particle level to revisit static models of structure-activity relationships.
Collapse
Affiliation(s)
- Matteo Monai
- Inorganic Chemistry and Catalysis Group, Institute for Sustainable and Circular Chemistry and Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG Utrecht, Netherlands
| | - Kellie Jenkinson
- EMAT and NANOlab Center of Excellence, University of Antwerp, 2020 Antwerp, Belgium
| | - Angela E M Melcherts
- Inorganic Chemistry and Catalysis Group, Institute for Sustainable and Circular Chemistry and Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG Utrecht, Netherlands
| | - Jaap N Louwen
- Inorganic Chemistry and Catalysis Group, Institute for Sustainable and Circular Chemistry and Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG Utrecht, Netherlands
| | - Ece A Irmak
- EMAT and NANOlab Center of Excellence, University of Antwerp, 2020 Antwerp, Belgium
| | - Sandra Van Aert
- EMAT and NANOlab Center of Excellence, University of Antwerp, 2020 Antwerp, Belgium
| | | | - Charlotte Vogt
- Inorganic Chemistry and Catalysis Group, Institute for Sustainable and Circular Chemistry and Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG Utrecht, Netherlands
| | - Ward van der Stam
- Inorganic Chemistry and Catalysis Group, Institute for Sustainable and Circular Chemistry and Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG Utrecht, Netherlands
| | - Tomáš Duchoň
- Peter-Grünberg-Institut 6, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Břetislav Šmíd
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, 180 00 Prague, Czech Republic
| | | | - Peter Berben
- BASF Nederland B.V., 3454 PK De Meern, Netherlands
| | - Sara Bals
- EMAT and NANOlab Center of Excellence, University of Antwerp, 2020 Antwerp, Belgium
| | - Bert M Weckhuysen
- Inorganic Chemistry and Catalysis Group, Institute for Sustainable and Circular Chemistry and Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG Utrecht, Netherlands
| |
Collapse
|
6
|
Nannuzzi C, Mino L, Bordiga S, Pedersen AH, Houghton JM, Vennestrøm PN, Janssens TV, Berlier G. Optimization of high surface area VOx/TiO2 catalysts for low-temperature NH3-SCR for NOx abatement. J Catal 2023. [DOI: 10.1016/j.jcat.2023.03.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
|
7
|
Toulhoat H. The optimal heterogeneous catalyst for an acid-base reaction. J Catal 2022. [DOI: 10.1016/j.jcat.2022.06.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
8
|
Cazzaniga M, Micciarelli M, Gabas F, Finocchi F, Ceotto M. Quantum Anharmonic Calculations of Vibrational Spectra for Water Adsorbed on Titania Anatase(101) Surface: Dissociative versus Molecular Adsorption. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:12060-12073. [PMID: 35928238 PMCID: PMC9340806 DOI: 10.1021/acs.jpcc.2c02137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 06/10/2022] [Indexed: 06/15/2023]
Abstract
The interaction of water molecules and hydroxyl groups with titanium dioxide (TiO2) surfaces is ubiquitous and very important in anatase nanoparticle photocatalytic processes. Infrared spectroscopy, assisted by ab initio calculations of vibrational frequencies, can be a powerful tool to elucidate the mechanisms behind water adsorption. However, a straightforward comparison between measurements and calculations remains a challenging task because of the complexity of the physical phenomena occurring on nanoparticle surfaces. Consequently, severe computational approximations, such as harmonic vibrational ones, are usually employed. In the present work we partially address this complexity issue by overcoming some of the standard approximations used in theoretical simulations and employ the Divide and Conquer Semiclassical Initial Value Representation (DC-SCIVR) molecular dynamics. This method allows to perform simulations of vibrational spectra of large dimensional systems accounting not only for anharmonicities, but also for nuclear quantum effects. We apply this computational method to water and deuterated water adsorbed on the ideal TiO2 anatase(101) surface, contemplating both the molecular and the dissociated adsorption processes. The results highlight not only the presence of an anharmonic shift of the frequencies in agreement with the experiments, but also complex quantum mechanical spectral signatures induced by the coupling of molecular vibrational modes with the surface ones, which are different in the hydrogenated case from the deuterated one. These couplings are further analyzed by exploiting the mode subdivision performed during the divide and conquer procedure.
Collapse
Affiliation(s)
- Marco Cazzaniga
- Dipartimento
di Chimica, Universitá degli Studi
di Milano, via Golgi 19, 20133 Milano, Italy
| | - Marco Micciarelli
- Dipartimento
di Chimica, Universitá degli Studi
di Milano, via Golgi 19, 20133 Milano, Italy
| | - Fabio Gabas
- Dipartimento
di Chimica, Universitá degli Studi
di Milano, via Golgi 19, 20133 Milano, Italy
| | - Fabio Finocchi
- Sorbonne
Université, CNRS, Institut des NanoSciences
de Paris (INSP), 4 Place
Jussieu, Paris F- 75005, France
| | - Michele Ceotto
- Dipartimento
di Chimica, Universitá degli Studi
di Milano, via Golgi 19, 20133 Milano, Italy
| |
Collapse
|
9
|
Xue W, Yan Z, Bao Q, Zhang W, Mei D. Effects of hydroxylation on the acidic and basic strengths of anatase TiO 2 surfaces. MOLECULAR SIMULATION 2022. [DOI: 10.1080/08927022.2022.2049774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Wenjuan Xue
- School of Materials Science and Engineering, Tiangong University, Tianjin, People’s Republic of China
| | - Zhenxin Yan
- School of Chemical Engineering and Technology, Tiangong University, Tianjin, People’s Republic of China
| | - Qianqian Bao
- School of Chemical Engineering and Technology, Tiangong University, Tianjin, People’s Republic of China
| | - Weiwei Zhang
- School of Chemical Engineering and Technology, Tiangong University, Tianjin, People’s Republic of China
| | - Donghai Mei
- School of Materials Science and Engineering, Tiangong University, Tianjin, People’s Republic of China
- School of Chemical Engineering and Technology, Tiangong University, Tianjin, People’s Republic of China
- School of Environmental Science and Engineering, Tiangong University, Tianjin, People’s Republic of China
| |
Collapse
|
10
|
Cantarelli C, Darenne B, Alves Fortunato M, de Bruin T, Costa D. DFT screening of adsorption of biodiesel molecules on aluminum and stainless steel surfaces. RESULTS IN SURFACES AND INTERFACES 2022. [DOI: 10.1016/j.rsurfi.2022.100050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
11
|
Favre R, Raybaud P, Le Bahers T. Electronic structures of the MoS 2/TiO 2 (anatase) heterojunction: influence of physical and chemical modifications at the 2D- or 1D-interfaces. Phys Chem Chem Phys 2022; 24:2646-2655. [PMID: 35029604 DOI: 10.1039/d1cp05151b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
To tackle the challenge of CO2 photoreduction, semiconducting layered transition metal dichalcogenides like MoS2 have attracted much attention due to their tunable 2D nano-structures. By using advanced periodic density functional theory calculations (HSE06 functional), we provide a systematic quantification of the optoelectronic properties of various interfacial heterostructures composed of 2H-MoS2 and anatase TiO2. We systematically determine the band gaps, and conduction band (CB) and valence band (VB) positions to figure out the nature of the heterojunction. Two main surface orientations of anatase TiO2 particles, (101) and (001), are considered with 2D-MoS2 nanosheets or nanoribbons forming either a 2D physical (van der Waals) or through a 1D chemical interface. The possibility to chemically modify the MoS2/TiO2 interface, either by sulfidation or hydration, and its effect on the electronic structure are deeply investigated. These modifications in the heterostructure lead to important changes in the electronic properties and charge transfer between the two materials which impact both photon absorption properties and charge carrier dynamics suspected to influence in turn the photocatalytic activity. While a type I hetrojunction is found for the 1D chemical interface, a type II heterojunction with appropriate CB/VB positions for CO2 reduction and H2O oxidation is identified for the 2D physical interface which could lead to the targeted Z-scheme mechanism with strong potential interest in photocatalysis applications.
Collapse
Affiliation(s)
- Rémi Favre
- Univ Lyon, ENS de Lyon, CNRS, Université Claude Bernard Lyon 1, Laboratoire de Chimie UMR 5182, F-69342, France.
| | - Pascal Raybaud
- Univ Lyon, ENS de Lyon, CNRS, Université Claude Bernard Lyon 1, Laboratoire de Chimie UMR 5182, F-69342, France. .,IFP Energies Nouvelles, Rond-point de l'échangeur de Solaize, BP 3, 69360 Solaize, France
| | - Tangui Le Bahers
- Univ Lyon, ENS de Lyon, CNRS, Université Claude Bernard Lyon 1, Laboratoire de Chimie UMR 5182, F-69342, France.
| |
Collapse
|
12
|
Lu S, Yan L, Zhong W, Jing C. Hydration of TiO 2 Facets Regulates As(III) Adsorption: DFT and DRIFTS Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:275-281. [PMID: 34936360 DOI: 10.1021/acs.langmuir.1c02474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Hydration of TiO2 facets controls the reactions occurring at the mineral-water interfaces. However, the underlying mechanism of the facet-dependent hydration and the effect of hydration on contaminant adsorption are still ambiguous. Herein, arsenite [As(III)] adsorption on hydrated {001}, {100}, {101}, and {201} TiO2 was explored by integrating multiple characterizations and density functional theory (DFT) calculations. Our macroscopic adsorption results show an As(III) adsorption density order of {201} > {100} > {101} > {001}, though As(III) on each facet formed a bidentate binuclear structure, as evidenced by the extended X-ray absorption fine structure analysis. The in situ diffuse reflectance infrared Fourier transform spectroscopy analysis identified distinctive surface hydroxyls on four-faceted TiO2 upon water adsorption. The hydrated surface regulated the subsequent As(III) adsorption, giving an As(III) adsorption energy order of {201} (-0.95 eV) < {100} (-0.38 eV) < {101} (-0.005 eV) < {001} (0.04 eV) according to DFT calculations. The As(III) adsorption energy on hydrated facets was linearly correlated with the macroscopical As(III) adsorption density (R2 = 0.99, p < 0.05), revealing that the impregnable water binding highly suppressed the exchange of As(III) molecules with adsorbed water. Our study provided a novel insight into the facet-dependent interfacial adsorption.
Collapse
Affiliation(s)
- Shaoyu Lu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Li Yan
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wen Zhong
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chuanyong Jing
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|
13
|
Wu L, Lin J, Ren L, Li QN, Chi X, Luo L, Zhang Y, Zeng MH. Electronic Structures of Hydroxyled Low Index Surfaces of Rutile and Anatase-Type Titanium Dioxide. Phys Chem Chem Phys 2022; 24:15091-15102. [DOI: 10.1039/d1cp04729a] [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
Different surface planes of various types of TiO2 crystals have diverse catalysis effects on the splitting of H2O and H2 and the electronic structures of the formed hydroxylated titanium dioxide...
Collapse
|
14
|
Deng L, Han S, Zhou D, Li Y, Shen W. Morphology dependent effect of γ-Al2O3 for ethanol dehydration: nanorods and nanosheets. CrystEngComm 2022. [DOI: 10.1039/d1ce01316e] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
γ-Al2O3 nanorods gave the improved selectivity of C2H4 in ethanol dehydration due to the selective exposure of {100} facets.
Collapse
Affiliation(s)
- Li Deng
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Shaobo Han
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Di Zhou
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yong Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Wenjie Shen
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| |
Collapse
|
15
|
Mahdavi-Shakib A, Rich LC, Whittaker TN, Chandler BD. Hydrogen Adsorption at the Au/TiO2 Interface: Quantitative Determination and Spectroscopic Signature of the Reactive Interface Hydroxyl Groups at the Active Site. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04419] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Akbar Mahdavi-Shakib
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Lauren C. Rich
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
| | - Todd N. Whittaker
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
- Department of Chemical and Biological Engineering, The University of Colorado, Boulder, Colorado 80303, United States
| | - Bert D. Chandler
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| |
Collapse
|
16
|
Morteo‐Flores F, Roldan A. The Effect of Pristine and Hydroxylated Oxide Surfaces on the Guaiacol HDO Process: A DFT Study. Chemphyschem 2021; 23:e202100583. [PMID: 34495572 PMCID: PMC9292963 DOI: 10.1002/cphc.202100583] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/07/2021] [Indexed: 11/07/2022]
Abstract
The acid‐base character of oxide supports is crucial for catalytic reactions. In this work, the acid‐base properties of five oxide surfaces common in heterogeneous catalysis were investigated and related to their interaction with monolignol compounds derived from lignin. We have used density functional theory simulations also to understand the role of the surfaces’ hydroxylation state. The results show that moderate hydroxyl coverage on the amphoteric γ‐Al2O3 (110) slightly strengthens the oxy‐compounds’ adsorption due to an increase in Lewis acidity. Similarly, low hydroxyl coverage on the reducible TiO2 (101) enlarges its adsorption capacity by up to 42 % compared with its clean surface. The higher affinity is attributed to the more favourable interaction between the surface‐OH groups and the aromatic rings. Overall, the results indicate that hydroxyl coverage enhances the amphoteric and reducible adsorption capacity towards aromatic species.
Collapse
Affiliation(s)
- Fabian Morteo‐Flores
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCF10 3ATCardiffUK
| | - Alberto Roldan
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCF10 3ATCardiffUK
| |
Collapse
|
17
|
Jian M, Liu JX, Li WX. Hydroxyl improving the activity, selectivity and stability of supported Ni single atoms for selective semi-hydrogenation. Chem Sci 2021; 12:10290-10298. [PMID: 34377416 PMCID: PMC8336451 DOI: 10.1039/d1sc03087f] [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: 06/08/2021] [Accepted: 06/19/2021] [Indexed: 12/28/2022] Open
Abstract
Atomically dispersed metal catalysts with high atomic utilization and selectivity have been widely studied for acetylene semi-hydrogenation in excess ethylene among others. Further improvements of activity and selectivity, in addition to stability and loading, remain elusive due to competitive adsorption and desorption between reactants and products, hydrogen activation, partial hydrogenation etc. on limited site available. Herein, comprehensive density functional theory calculations have been used to explore the new strategy by introducing an appropriate ligand to stabilize the active single atom, improving the activity and selectivity on oxide supports. We find that the hydroxyl group can stabilize Ni single atoms significantly by forming Ni1(OH)2 complexes on anatase TiO2(101), whose unique electronic and geometric properties enable high performance in acetylene semi-hydrogenation. Specifically, Ni1(OH)2/TiO2(101) shows favorable acetylene adsorption and promotes the heterolytic dissociation of H2 achieving high catalytic activity, and it simultaneously weakens the ethylene bonding to facilitate subsequent desorption showing high ethylene selectivity. Hydroxyl stabilization of single metal atoms on oxide supports and promotion of the catalytic activity are sensitive to transition metal and the oxide supports. Compared to Co, Rh, Ir, Pd, Pt, Cu, Ag and Au, and anatase ZrO2, IrO2 and NbO2 surfaces, the optimum interactions between Ni, O and Ti and resulted high activity, selectivity and stability make Ni1(OH)2/TiO2(101) a promising catalyst in acetylene hydrogenation. Our work provides valuable guidelines for utilization of ligands in the rational design of stable and efficient atomically dispersed catalysts.
Collapse
Affiliation(s)
- Minzhen Jian
- Department of Chemical Physics, School of Chemistry and Materials Science, University of Science and Technology of China Hefei Anhui 230026 China
| | - Jin-Xun Liu
- Department of Chemical Physics, School of Chemistry and Materials Science, University of Science and Technology of China Hefei Anhui 230026 China
| | - Wei-Xue Li
- Department of Chemical Physics, School of Chemistry and Materials Science, University of Science and Technology of China Hefei Anhui 230026 China
- Hefei National Laboratory for Physical Sciences at the Microscale Hefei Anhui 230026 China
| |
Collapse
|
18
|
Qi M, Zhang H, Dong Q, Li J, Musgrave RA, Zhao Y, Dulock N, Wang D, Byers JA. Electrochemically switchable polymerization from surface-anchored molecular catalysts. Chem Sci 2021; 12:9042-9052. [PMID: 34276933 PMCID: PMC8261715 DOI: 10.1039/d1sc02163j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Accepted: 05/27/2021] [Indexed: 11/21/2022] Open
Abstract
Redox-switchable polymerizations of lactide and epoxides were extended to the solid state by anchoring an iron-based polymerization catalyst to TiO2 nanoparticles. The reactivity of the molecular complexes and their redox-switching characteristics were maintained in the solid-state. These properties resulted in surface-initiated polymerization reactions that produced polymer brushes whose chemical composition is dictated by the oxidation state of the iron-based complex. Depositing the catalyst-functionalized TiO2 nanoparticles on fluorine-doped tin oxide resulted in an electrically addressable surface that could be used to demonstrate spatial control in redox-switchable polymerization reactions. By using a substrate that contained two electrically isolated domains wherein one domain was exposed to an oxidizing potential, patterns of surface-bound polyesters and polyethers were accessible through sequential application of lactide and cyclohexene oxide. The differentially functionalized surfaces demonstrated distinct physical properties that illustrated the promise for using the method to pattern surfaces with multiple, chemically distinct polymer brushes.
Collapse
Affiliation(s)
- Miao Qi
- Department of Chemistry, Boston College 2609 Beacon St., Chestnut Hill MA 02467 USA
| | - Haochuan Zhang
- Department of Chemistry, Boston College 2609 Beacon St., Chestnut Hill MA 02467 USA
| | - Qi Dong
- Department of Chemistry, Boston College 2609 Beacon St., Chestnut Hill MA 02467 USA
| | - Jingyi Li
- Department of Chemistry, Boston College 2609 Beacon St., Chestnut Hill MA 02467 USA
| | - Rebecca A Musgrave
- Department of Chemistry and Chemical Biology, Harvard University 12 Oxford Street Cambridge Massachusetts 02138 USA
| | - Yanyan Zhao
- Department of Chemistry, Boston College 2609 Beacon St., Chestnut Hill MA 02467 USA
| | - Nicholas Dulock
- Department of Chemistry, Boston College 2609 Beacon St., Chestnut Hill MA 02467 USA
| | - Dunwei Wang
- Department of Chemistry, Boston College 2609 Beacon St., Chestnut Hill MA 02467 USA
| | - Jeffery A Byers
- Department of Chemistry, Boston College 2609 Beacon St., Chestnut Hill MA 02467 USA
| |
Collapse
|
19
|
Padmanabhan NT, Thomas N, Louis J, Mathew DT, Ganguly P, John H, Pillai SC. Graphene coupled TiO 2 photocatalysts for environmental applications: A review. CHEMOSPHERE 2021; 271:129506. [PMID: 33445017 DOI: 10.1016/j.chemosphere.2020.129506] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 12/28/2020] [Accepted: 12/29/2020] [Indexed: 05/28/2023]
Abstract
Nanostructured photocatalysts have always offered opportunities to solve issues concerned with the environmental challenges caused by rapid urbanization and industrialization. These materials, due to their tunable physicochemical characteristics, are capable of providing a clean and sustainable ecosystem to humanity. One of the current thriving research focuses of visible-light-driven photocatalysts is on the nanocomposites of titanium dioxide (TiO2) with carbon nanostructures, especially graphene. Coupling TiO2 with graphene has proven more active by photocatalysis than TiO2 alone. It is generally considered that graphene sheets act as an electron acceptor facilitating the transfer and separation of photogenerated electrons during TiO2 excitation, thereby reducing electron-hole recombination. This study briefly reviews the fundamental mechanism and interfacial charge-transfer dynamics in TiO2/graphene nanocomposites. Design strategies of various graphene-based hybrids are highlighted along with some specialized synthetic routes adopted to attain preferred properties. Importantly, the enhancing interfacial charge transfer of photogenerated e¯CB through the graphene layers by morphology orientation of TiO2, predominated exposure of their high energy crystal facets, defect engineering, enhancing catalytic sites in graphene, constructing dedicated architectures, tuning the nanomaterial dimensionality at the interface, and employing the synergism adopted through various modifications, are systematically compiled. Portraying the significance of these photocatalytic hybrids in environmental remediation, important applications including air and water purification, self-cleaning surfaces, H2 production, and CO2 reduction to desired fuels, are addressed.
Collapse
Affiliation(s)
- Nisha T Padmanabhan
- Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Kerala, India
| | - Nishanth Thomas
- Nanotechnology and Bio-engineering Research Group, Department of Environmental Science, Institute of Technology Sligo, Sligo, Ireland; Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Institute of Technology Sligo, Sligo, Ireland
| | - Jesna Louis
- Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Kerala, India; Inter University Centre for Nanomaterials and Devices, Cochin University of Science and Technology, Kerala, India
| | - Dhanu Treasa Mathew
- Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Kerala, India
| | - Priyanka Ganguly
- Nanotechnology and Bio-engineering Research Group, Department of Environmental Science, Institute of Technology Sligo, Sligo, Ireland; Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Institute of Technology Sligo, Sligo, Ireland
| | - Honey John
- Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Kerala, India; Inter University Centre for Nanomaterials and Devices, Cochin University of Science and Technology, Kerala, India
| | - Suresh C Pillai
- Nanotechnology and Bio-engineering Research Group, Department of Environmental Science, Institute of Technology Sligo, Sligo, Ireland; Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Institute of Technology Sligo, Sligo, Ireland.
| |
Collapse
|
20
|
Mino L, Morales-García Á, Bromley ST, Illas F. Understanding the nature and location of hydroxyl groups on hydrated titania nanoparticles. NANOSCALE 2021; 13:6577-6585. [PMID: 33885537 DOI: 10.1039/d1nr00610j] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
TiO2 nanoparticles (NPs) are intensively studied and widely used due to their huge potential in numerous applications involving their interaction with ultraviolet light (e.g., photocatalysis and sunscreens). Typically, these NPs are in water-containing environments and thus tend to be hydrated. As such, there is a growing need to better understand the physicochemical properties of hydrated TiO2 NPs in order to improve their performance in photochemical applications (e.g., photocatalytic water splitting) and to minimise their environmental impact (e.g., potential biotoxicity). To help address the need for reliable and detailed data on how nano-titania interacts with water, we present a systematic experimental and theoretical study of surface hydroxyl (OH) groups on photoactive anatase TiO2 NPs. Employing well-defined experimentally synthesised NPs and detailed realistic NP models, we obtain the measured and computed infrared spectra of the surface hydroxyls, respectively. By comparing the experimental and theoretical spectra we are able to identify the type and location of different OH groups in these NP systems. Specifically, our study allows us to provide unprecedented and detailed information about the coverage-dependent distribution of hydroxyl groups on the surface of experimental titania NPs, the degree of their H-bonding interactions and their associated assigned vibrational modes. Our work promises to lead to new routes for developing new and safe nanotechnologies based on hydrated TiO2 NPs.
Collapse
Affiliation(s)
- Lorenzo Mino
- Department of Chemistry and NIS Centre, University of Torino, via Giuria 7, 10125 Torino, Italy.
| | | | | | | |
Collapse
|
21
|
Peiris S, Silva HB, Ranasinghe KN, Bandara SV, Perera IR. Recent development and future prospects of
TiO
2
photocatalysis. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202000465] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Sasanka Peiris
- Australian Institute for Bioengineering and Nanotechnology University of Queensland St Lucia Queensland Australia
| | - Haritha B. Silva
- Department of Chemistry, Faculty of Science University of Peradeniya Peradeniya Sri Lanka
| | - Kumudu N. Ranasinghe
- Department of Chemistry, Faculty of Science University of Peradeniya Peradeniya Sri Lanka
| | - Sanjaya V. Bandara
- Department of Chemistry, Faculty of Science University of Peradeniya Peradeniya Sri Lanka
| | | |
Collapse
|
22
|
Hydrogen Production via Pd-TiO2 Photocatalytic Water Splitting under Near-UV and Visible Light: Analysis of the Reaction Mechanism. Catalysts 2021. [DOI: 10.3390/catal11030405] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Photocatalytic hydrogen production via water splitting using a noble metal on a TiO2 is a technology that has developed rapidly over the past few years. Specifically, palladium doped TiO2 irradiated with near-UV or alternatively with visible light has shown promising results. With this end in mind, strategically designed experiments were developed in the Photo-CREC Water-II (PCW-II) Reactor using a 0.25 wt.% Pd-TiO2 under near-UV and visible light, and ethanol as an organic scavenger. Acetaldehyde, carbon monoxide, carbon dioxide, methane, ethane, ethylene, and hydrogen peroxide together with hydrogen were the main chemical species observed. A Langmuir adsorption isotherm was also established for hydrogen peroxide. On this basis, it is shown that pH variations, hydrogen peroxide formation/adsorption, and the production of various redox chemical species provide an excellent carbon element balance, as well as OH• and H• radicals balances. Under near-UV irradiation, 113 cm3 STP of H2 is produced after 6 h, reaching an 99.8% elemental carbon balance and 99.2% OH• and H• and radical balance. It is also proven that a similar reaction network can be considered adequate for the photoreduced Pd-TiO2 photocatalyst yielding 29 cm3 STP of H2 with 95.4% carbon and the 97.5% OH•–H• radical balance closures. It is shown on this basis that a proposed “series-parallel” reaction network describes the water splitting reaction using the mesoporous Pd-TiO2 and ethanol as organic scavenger.
Collapse
|
23
|
Seo H, Park JH, Kwon OH, Kwon OP, Kwak SK, Kim SW. Highly qualified InP based QDs through a temperature controlled ZnSe shell coating process and their DFT calculations. NANOSCALE ADVANCES 2020; 2:5615-5622. [PMID: 36133859 PMCID: PMC9417730 DOI: 10.1039/d0na00451k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 10/14/2020] [Indexed: 06/16/2023]
Abstract
For QDs used in displays, a narrow emission linewidth and emission peak tuning depending on the morphology of the QDs are the most important factors in order to maximize the range of colors to be represented. CdSe-based QDs are known as the most suitable QDs for displays, but cadmium is a highly toxic and regulated substance for use worldwide; InP-based QDs are the most noteworthy alternative. However, InP-based QDs have a wider linewidth of emission light in the entire visible region compared to CdSe-based QDs. In this work, we use the ZnSe inner shell as a lattice buffer layer between the InGaP core and the ZnS outer shell in the type-I structure, using a heating-up method in which ZnSe precursors were added to a low-temperature core solution and then rapidly raised to a temperature of 270-320 °C. Interestingly, when reacting at high temperatures, the shape of the QDs changes to a tetrahedron, and the FWHM becomes narrower than at low temperature. To understand this phenomenon, we proceeded with transmission electron microscopy (TEM) and powder X-ray diffraction (PXRD) analyses, and a reasonable explanation was provided with DFT calculations.
Collapse
Affiliation(s)
- Haewoon Seo
- Department of Molecular Science and Technology, Ajou University Suwon 443-749 Korea
| | - Ju Hyun Park
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) 50 UNIST-gil Ulsan 44919 Republic of Korea
| | - O-Hoon Kwon
- Department of Molecular Science and Technology, Ajou University Suwon 443-749 Korea
| | - O Pil Kwon
- Department of Molecular Science and Technology, Ajou University Suwon 443-749 Korea
| | - Sang Kyu Kwak
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) 50 UNIST-gil Ulsan 44919 Republic of Korea
| | - Sang-Wook Kim
- Department of Molecular Science and Technology, Ajou University Suwon 443-749 Korea
| |
Collapse
|
24
|
Buniazet Z, Couble J, Maury S, Cabiac A, Loridant S, Bianchi D. Acidity of SiO 2-Supported Metal Oxides in the Presence of H 2O Using the AEIR Method: 2. Adsorption and Coadsorption of NH 3 and H 2O on TiO 2/SiO 2 Catalysts. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:13383-13395. [PMID: 32970949 DOI: 10.1021/acs.langmuir.0c01717] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Two different TiO2/SiO2 compounds containing TiO2 nanodomains dispersed over SiO2 were investigated applying the AEIR method at the adsorption equilibrium of NH3 and H2O from 300 to 723 K, particularly for the measurement of the individual heats of adsorption of the different species on Lewis acidic sites (LAS) and Brønsted acidic sites (BAS) as evaluation of the strength of the sites. It revealed two types of NH3 adsorption sites: the first ones could correspond either to NH3 species H-bonded to free OH groups or to coordinated weak LAS (named L1). The second ones (L2) were attributed to strongest LAS similar to those present at the surface of TiO2 nanocrystallites. They also correspond to the stronger adsorption sites of H2O. Two types of Brønsted acid sites (BAS) were additionally evidenced by the AEIR method and proposed to be specifically located on the Si-O-Ti bridging bonds at the TiO2/SiO2 interface. The heats of adsorption of the different adsorbed species provided by the AEIR method were consistent with literature data on average values of the heats of adsorption of NH3 and H2O from microcalorimetry measurements. The surface acidity of the two compounds in the presence of H2O was determined using NH3-H2O coadsorption. At T ≥ 473 K, the NH3 species on the L2 sites were not significantly displaced from the surface whatever the partial pressure of H2O studied in agreement with the Temkin competitive model using the individual heats of adsorption of the NH3 and H2O species. This model also revealed the presence of a small amount of H2O species adsorbed on L2 sites allowing H2O dissociation or/and hydrolysis of SiOTi or TiOTi bridges, leading to the formation of a much higher amount of BAS. Therefore, this original work combining the AEIR method and the Temkin competitive model provided new insights for understanding water effects on acidic oxide catalysts.
Collapse
Affiliation(s)
- Z Buniazet
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626 Villeurbanne, France
| | - J Couble
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626 Villeurbanne, France
| | - S Maury
- IFP Energies nouvelles, Rond-point de l'échangeur de Solaize, BP 3, F-69360 Solaize, France
| | - A Cabiac
- IFP Energies nouvelles, Rond-point de l'échangeur de Solaize, BP 3, F-69360 Solaize, France
| | - S Loridant
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626 Villeurbanne, France
| | - D Bianchi
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626 Villeurbanne, France
| |
Collapse
|
25
|
Computational chemistry approaches for the preparation of supported catalysts: Progress and challenges. J Catal 2020. [DOI: 10.1016/j.jcat.2020.09.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
26
|
Mattsson S, Senges G, Riedel S, Paulus B. Combining Theory and Experiment to Characterize the Voltammetric Behavior of Nickel Anodes in the Simons Process. Chemistry 2020; 26:10781-10786. [PMID: 32378744 PMCID: PMC7497199 DOI: 10.1002/chem.202000881] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Indexed: 11/15/2022]
Abstract
The Simons process, otherwise known as the electrochemical fluorination (ECF) method, is widely used in industry to electrolytically synthesize chemicals for various purposes. Even to this day, the exact mechanism of the ECF reaction remains unknown, but is believed to involve the formation of an anodic nickel fluoride film with highly oxidized nickel centers. In this study, experiments and density functional theory calculations are combined to characterize the initial anodic peak occurring at potentials typically required in an ECF cell. NiF2 is believed to form a passivating layer at low potentials. The calculations show that a potential of +3.1 V is required to oxidize surface Ni2+ centers to Ni3+ . This is in good agreement with the measured anodic peak at +3.57 V.
Collapse
Affiliation(s)
- Stefan Mattsson
- Institut für Chemie und BiochemieFreie Universität BerlinArnimallee 2214195BerlinGermany
| | - Gene Senges
- Institut für Chemie und BiochemieFreie Universität BerlinFabeckstr. 34–3614195BerlinGermany
| | - Sebastian Riedel
- Institut für Chemie und BiochemieFreie Universität BerlinFabeckstr. 34–3614195BerlinGermany
| | - Beate Paulus
- Institut für Chemie und BiochemieFreie Universität BerlinArnimallee 2214195BerlinGermany
| |
Collapse
|
27
|
Guo Z, Zhang H, Ma X, Zhou X, Liang D, Mao J, Yu J, Wang G, Huang T. Photoelectrochemical Catalysis of Fluorine‐Doped Amorphous TiO
2
Nanotube Array for Water Splitting. ChemistrySelect 2020. [DOI: 10.1002/slct.202002516] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zhongqin Guo
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical MaterialsSchool of Chemistry and Chemical EngineeringUniversity of Jinan Jinan Shandong 250022 China
| | - Haizhou Zhang
- Department of Cardiac SurgeryShandong Provincial Hospital Affiliated to Shandong First Medical University No.324 Jingwu Road Jinan Shandong 250021 China
| | - Xiaochun Ma
- Department of Cardiac SurgeryShandong Provincial Hospital Affiliated to Shandong First Medical University No.324 Jingwu Road Jinan Shandong 250021 China
| | - Xiaoming Zhou
- Department of Cardiac SurgeryShandong Provincial Hospital Affiliated to Shandong First Medical University No.324 Jingwu Road Jinan Shandong 250021 China
| | - Dong Liang
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical MaterialsSchool of Chemistry and Chemical EngineeringUniversity of Jinan Jinan Shandong 250022 China
| | - Jianfeng Mao
- Institute for Superconducting & Electronic MaterialsUniversity of Wollongong NSW 2500 Australia
| | - Jiemei Yu
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical MaterialsSchool of Chemistry and Chemical EngineeringUniversity of Jinan Jinan Shandong 250022 China
| | - Gang Wang
- Research and Development Center for Graphene/Polymer CompositesShandongLutai Holding Group Co.Ltd. Jining Shandong 272000 China
| | - Taizhong Huang
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical MaterialsSchool of Chemistry and Chemical EngineeringUniversity of Jinan Jinan Shandong 250022 China
| |
Collapse
|
28
|
Piontek SM, DelloStritto M, Mandal B, Marshall T, Klein ML, Borguet E. Probing Heterogeneous Charge Distributions at the α-Al2O3(0001)/H2O Interface. J Am Chem Soc 2020; 142:12096-12105. [DOI: 10.1021/jacs.0c01366] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
29
|
Lin F, Chen Y, Zhang L, Mei D, Kovarik L, Sudduth B, Wang H, Gao F, Wang Y. Single-Facet Dominant Anatase TiO2 (101) and (001) Model Catalysts to Elucidate the Active Sites for Alkanol Dehydration. ACS Catal 2020. [DOI: 10.1021/acscatal.9b04654] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fan Lin
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Yuan Chen
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Lu Zhang
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Donghai Mei
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Libor Kovarik
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Berlin Sudduth
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Huamin Wang
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Feng Gao
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Yong Wang
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| |
Collapse
|
30
|
Yuan W, Zhu B, Li XY, Hansen TW, Ou Y, Fang K, Yang H, Zhang Z, Wagner JB, Gao Y, Wang Y. Visualizing H2O molecules reacting at TiO2 active sites with transmission electron microscopy. Science 2020; 367:428-430. [DOI: 10.1126/science.aay2474] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 10/24/2019] [Accepted: 12/10/2019] [Indexed: 01/10/2023]
Abstract
Imaging a reaction taking place at the molecular level could provide direct information for understanding the catalytic reaction mechanism. We used in situ environmental transmission electron microscopy and a nanocrystalline anatase titanium dioxide (001) surface with (1 × 4) reconstruction as a catalyst, which provided highly ordered four-coordinated titanium “active rows” to realize real-time monitoring of water molecules dissociating and reacting on the catalyst surface. The twin-protrusion configuration of adsorbed water was observed. During the water–gas shift reaction, dynamic changes in these structures were visualized on these active rows at the molecular level.
Collapse
Affiliation(s)
- Wentao Yuan
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China
| | - Beien Zhu
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800 China
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210 China
| | - Xiao-Yan Li
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800 China
- University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Thomas W. Hansen
- DTU Nanolab, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark
| | - Yang Ou
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China
| | - Ke Fang
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China
| | - Hangsheng Yang
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China
| | - Ze Zhang
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China
| | - Jakob B. Wagner
- DTU Nanolab, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark
| | - Yi Gao
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800 China
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210 China
| | - Yong Wang
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China
| |
Collapse
|
31
|
Sai Phani Kumar V, Deshpande PA. On the stability of hydroxyl groups on substituted titania. Phys Chem Chem Phys 2020; 22:1250-1257. [DOI: 10.1039/c9cp05525h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present study reports the stability of hydroxyl groups involving the surface coordinated oxygens of Pd,C,N-doped, and Pd/C and Pd/N-codoped anatase TiO2, probed using DFT calculations.
Collapse
Affiliation(s)
- V. Sai Phani Kumar
- Quantum and Molecular Engineering Laboratory
- Department of Chemical Engineering
- Indian Institute of Technology Kharagpur
- Kharagpur 721302
- India
| | - Parag A. Deshpande
- Quantum and Molecular Engineering Laboratory
- Department of Chemical Engineering
- Indian Institute of Technology Kharagpur
- Kharagpur 721302
- India
| |
Collapse
|
32
|
Molecules and heterostructures at TiO2 surface: the cases of H2O, CO2, and organic and inorganic sensitizers. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-04003-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
33
|
Mahdavi-Shakib A, Husremovic S, Ki S, Glynn J, Babb L, Sempel J, Stavrinoudis I, Arce-Ramos JM, Nelson R, Grabow LC, Schwartz TJ, Frederick BG, Austin RN. Titania surface chemistry and its influence on supported metal catalysts. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.05.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
34
|
Wei B, Tielens F, Calatayud M. Understanding the Role of Rutile TiO 2 Surface Orientation on Molecular Hydrogen Activation. NANOMATERIALS 2019; 9:nano9091199. [PMID: 31454939 PMCID: PMC6780095 DOI: 10.3390/nano9091199] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 08/10/2019] [Accepted: 08/16/2019] [Indexed: 11/30/2022]
Abstract
Titanium oxide (TiO2) has been widely used in many fields, such as photocatalysis, photovoltaics, catalysis, and sensors, where its interaction with molecular H2 with TiO2 surface plays an important role. However, the activation of hydrogen over rutile TiO2 surfaces has not been systematically studied regarding the surface termination dependence. In this work, we use density functional theory (PBE+U) to identify the pathways for two processes: the heterolytic dissociation of H2 as a hydride–proton pair, and the subsequent H transfer from Ti to near O accompanied by reduction of the Ti sites. Four stoichiometric surface orientations were considered: (001), (100), (110), and (101). The lowest activation barriers are found for hydrogen dissociation on (001) and (110), with energies of 0.56 eV and 0.50 eV, respectively. The highest activation barriers are found on (100) and (101), with energies of 1.08 eV and 0.79 eV, respectively. For hydrogen transfer from Ti to near O, the activation barriers are higher (from 1.40 to 1.86 eV). Our results indicate that the dissociation step is kinetically more favorable than the H transfer process, although the latter is thermodynamically more favorable. We discuss the implications in the stability of the hydride–proton pair, and provide structures, electronic structure, vibrational analysis, and temperature effects to characterize the reactivity of the four TiO2 orientations.
Collapse
Affiliation(s)
- Baohuan Wei
- Sorbonne Université, CNRS, Laboratoire de Chimie Théorique, LCT, F. 75005 Paris, France
| | - Frederik Tielens
- General Chemistry (ALGC), Materials Modelling Group, Vrije Universiteit Brussel (Free University Brussels-VUB), Pleinlaan 2, 1050 Brussel, Belgium
| | - Monica Calatayud
- Sorbonne Université, CNRS, Laboratoire de Chimie Théorique, LCT, F. 75005 Paris, France.
| |
Collapse
|
35
|
Bian S, Ma Y, Shi Y, Fan X, Kong X. Superhalogen Species of Titanium Oxide Related Clusters Generated by Laser Ablation. J Phys Chem A 2019; 123:6787-6791. [DOI: 10.1021/acs.jpca.9b06282] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
36
|
Remzova M, Zouzelka R, Brzicova T, Vrbova K, Pinkas D, Rőssner P, Topinka J, Rathousky J. Toxicity of TiO 2, ZnO, and SiO 2 Nanoparticles in Human Lung Cells: Safe-by-Design Development of Construction Materials. NANOMATERIALS 2019; 9:nano9070968. [PMID: 31269717 PMCID: PMC6669541 DOI: 10.3390/nano9070968] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 06/26/2019] [Accepted: 06/29/2019] [Indexed: 02/03/2023]
Abstract
Rapid progress in the development of highly efficient nanoparticle-based construction technologies has not always been accompanied by a corresponding understanding of their effects on human health and ecosystems. In this study, we compare the toxicological effects of pristine TiO2, ZnO, SiO2, and coated SiO2 nanoparticles, and evaluate their suitability as additives to consolidants of weathered construction materials. First, water soluble tetrazolium 1 (WST-1) and lactate dehydrogenase (LDH) assays were used to determine the viability of human alveolar A549 cells at various nanoparticle concentrations (0–250 μg mL−1). While the pristine TiO2 and coated SiO2 nanoparticles did not exhibit any cytotoxic effects up to the highest tested concentration, the pristine SiO2 and ZnO nanoparticles significantly reduced cell viability. Second, as all developed nanoparticle-modified consolidants increased the mechanical strength of weathered sandstone, the decisive criterion for the selection of the most suitable nanoparticle additive was as low toxicity as possible. We believe that this approach would be of high importance in the industry, to identify materials representing top functional properties and low toxicity, at an early stage of the product development.
Collapse
Affiliation(s)
- Monika Remzova
- J. Heyrovsky Institute of Physical Chemistry of the CAS, Dolejskova 3, 18223 Prague, Czech Republic
| | - Radek Zouzelka
- J. Heyrovsky Institute of Physical Chemistry of the CAS, Dolejskova 3, 18223 Prague, Czech Republic
| | - Tana Brzicova
- Institute of Experimental Medicine of the CAS, Videnska 1083, 14220 Prague, Czech Republic
| | - Kristyna Vrbova
- Institute of Experimental Medicine of the CAS, Videnska 1083, 14220 Prague, Czech Republic
| | - Dominik Pinkas
- Institute of Molecular Genetics of the CAS, Microscopy Center, Electron Microscopy Core Facility, 14220 Prague, Czech Republic
| | - Pavel Rőssner
- Institute of Experimental Medicine of the CAS, Videnska 1083, 14220 Prague, Czech Republic
| | - Jan Topinka
- Institute of Experimental Medicine of the CAS, Videnska 1083, 14220 Prague, Czech Republic
| | - Jiri Rathousky
- J. Heyrovsky Institute of Physical Chemistry of the CAS, Dolejskova 3, 18223 Prague, Czech Republic.
| |
Collapse
|
37
|
González-Gómez R, Cusinato L, Bijani C, Coppel Y, Lecante P, Amiens C, Del Rosal I, Philippot K, Poteau R. Carboxylic acid-capped ruthenium nanoparticles: experimental and theoretical case study with ethanoic acid. NANOSCALE 2019; 11:9392-9409. [PMID: 31038521 DOI: 10.1039/c9nr00391f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Given that the properties of metal nanoparticles (NPs) depend on several parameters (namely, morphology, size, surface composition, crystalline structure, etc.), a computational model that brings a better understanding of a structure-property relationship at the nanoscale is a significant plus in order to explain the surface properties of metal NPs and also their catalytic viability, in particular, when envisaging a new stabilizing agent. In this study we combined experimental and theoretical tools to obtain a mapping of the surface of ruthenium NPs stabilized by ethanoic acid as a new capping ligand. For this purpose, the organometallic approach was applied as the synthesis method. The morphology and crystalline structure of the obtained particles was characterized by state-of-the art techniques (TEM, HRTEM, WAXS) and their surface composition was determined by various techniques (solution and solid-state NMR, IR, chemical titration, DFT calculations). DFT calculations of the vibrational features of model NPs and of the chemical shifts of model clusters allowed us to secure the spectroscopic experimental assignations. Spectroscopic data as well as DFT mechanistic studies showed that ethanoic acid lies on the metal surface as ethanoate, together with hydrogen atoms. The optimal surface composition determined by DFT calculations appeared to be ca. [0.4-0.6] H/Rusurf and 0.4 ethanoate/RuSurf, which was corroborated by experimental results. Moreover, for such a composition, a hydrogen adsorption Gibbs free energy in the range -2.0 to -3.0 kcal mol-1 was calculated, which makes these ruthenium NPs a promising nanocatalyst for the hydrogen evolution reaction in the electrolysis of water.
Collapse
Affiliation(s)
- Roberto González-Gómez
- LPCNO (IRSAMC), Université de Toulouse, INSA, UPS, CNRS (UMR 5215), Institut National des Sciences -Appliquées, 135 avenue de Rangueil, F-31077 Toulouse, France.
| | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Dos Reis Vargas M, de Castro EAS, Politi JRDS, Gargano R, Martins JBL. BTEX adsorption on TiO 2 anatase and rutile surfaces: DFT functionals. J Mol Model 2019; 25:137. [PMID: 31030259 DOI: 10.1007/s00894-019-4027-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Accepted: 04/04/2019] [Indexed: 11/25/2022]
Abstract
Benzene, toluene, ethylbenzene, and xylenes are volatile hydrocarbons known as BTEX, which present concerns about environmental problems. Density functional theory (DFT) functionals were used for the BTEX gas phase adsorption on TiO2 (110) of rutile and (101) of anatase surfaces. Dispersion terms have shown the importance to treat weak interactions and were used to study these adsorptions using plane wave DFT calculations. All BTEX molecules have the same trend for the adsorption on rutile and anatase surfaces. The inclusion of dispersion terms has a significant contribution for the interaction energy. Density of states results suggest the hybridization between the d state of pentacoordinated titanium atoms (Ti5C) and carbon p states of benzene. The adsorption energy values indicate an effective interaction between the BTEX and surfaces, mainly due to the aromatic π interaction, which is present in all adsorbates. However, for p-xylene the methyl hydrogen directs the second major influence. Graphical abstract Charge difference showing the system with the smallest interaction and the one with the largest interaction.
Collapse
Affiliation(s)
- Marcos Dos Reis Vargas
- Institute of Chemistry, University of Brasilia, Brasília, DF, CEP 70904970, Brazil
- Federal Institute of Goiás, Campus Goiânia, Goiânia, GO, 74055110, Brazil
| | - Elton A S de Castro
- State University of Goiás, Av. Universitária s/n, Formosa, GO, 73807250, Brazil
| | - José R Dos S Politi
- Institute of Chemistry, University of Brasilia, Brasília, DF, CEP 70904970, Brazil
| | - Ricardo Gargano
- Institute of Physics, University of Brasilia, Brasília, DF, CEP 70904970, Brazil
| | - João B L Martins
- Institute of Chemistry, University of Brasilia, Brasília, DF, CEP 70904970, Brazil.
- Instituto de Química, Universidade de Brasília, CP 4478, Brasília, DF, 70904-970, Brazil.
| |
Collapse
|
39
|
Mulcahy JR, He S, Jin DS, Guo W, Arteta S, Cliff JB, Zhu Z, Wei WD. Experimental Insights into the Growth of Single Truncated Anatase Bipyramids. Chemistry 2019; 25:993-996. [PMID: 30462865 DOI: 10.1002/chem.201805773] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Indexed: 11/06/2022]
Abstract
Fluorine has been recognized to selectively stabilize anatase titanium dioxide (TiO2 ) crystal facets; however, resolving its physical location at the nanometer scale remains empirically elusive. Here, we provide direct experimental evidence to reveal the spatial distribution of fluorine on single truncated anatase bipyramids (TABs) using nanoscale secondary ion mass spectrometry (NanoSIMS). Fluorine was found to preferentially adsorb on the (001) facet compared to the (101) facet of TABs. Moreover, NanoSIMS depth profiling exhibited a significantly different fluorine distribution between these two facets in the near-surface region, illustrating the essential role of lattice-doped fluorine in the anisotropic crystal growth of TABs.
Collapse
Affiliation(s)
- Justin R Mulcahy
- Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
| | - Shuai He
- Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
| | - Decarle S Jin
- Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
| | - Wenxiao Guo
- Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
| | - Sarah Arteta
- Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
| | - John B Cliff
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, 99354, USA
| | - Zihua Zhu
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, 99354, USA
| | - Wei David Wei
- Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
| |
Collapse
|
40
|
Zhou G, Jiang L, He D. Nanoparticulate Ru on TiO2 exposed the {1 0 0} facets: Support facet effect on selective hydrogenation of benzene to cyclohexene. J Catal 2019. [DOI: 10.1016/j.jcat.2018.11.032] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
41
|
Effect of the Co-deposition of Pd and Pt on
$$\hbox {TiO}_{2}$$
TiO
2
Photoactivity. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2019. [DOI: 10.1007/s13369-018-3275-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
42
|
El Gaidoumi A, Doña-Rodríguez JM, Pulido Melián E, González-Díaz OM, El Bali B, Navío JA, Kherbeche A. Mesoporous pyrophyllite–titania nanocomposites: synthesis and activity in phenol photocatalytic degradation. RESEARCH ON CHEMICAL INTERMEDIATES 2018. [DOI: 10.1007/s11164-018-3605-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
43
|
Mancardi G, Hernandez Tamargo C, Terranova U, de Leeuw NH. Calcium Phosphate Deposition on Planar and Stepped (101) Surfaces of Anatase TiO 2: Introducing an Interatomic Potential for the TiO 2/Ca-PO 4/Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:10144-10152. [PMID: 30059229 DOI: 10.1021/acs.langmuir.8b00984] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Titanium is commonly employed in orthopaedic and dental surgery, owing to its good mechanical properties. The titanium metal is usually passivated by a thin layer of its oxide, and in order to promote its integration with the biological tissue, it is covered by a bioactive material such as calcium phosphate (CaP). Here, we have investigated the deposition of calcium and phosphate species on the anatase phase of titanium dioxide (TiO2) using interatomic potential-based molecular dynamics simulations. We have combined different force fields developed for CaP, TiO2, and water, benchmarking the results against density functional theory calculations. On the basis of our study, we consider that the new parameters can be used successfully to study the nucleation of CaP on realistic anatase and rutile TiO2 nanoparticles, including surface defects.
Collapse
Affiliation(s)
- Giulia Mancardi
- Department of Chemistry , University College London , 20 Gordon Street , London WC1H 0AJ , U.K
- School of Chemistry , Cardiff University , Main Building, Park Place , Cardiff , CF10 3AT , U.K
| | | | - Umberto Terranova
- School of Chemistry , Cardiff University , Main Building, Park Place , Cardiff , CF10 3AT , U.K
| | - Nora H de Leeuw
- Department of Chemistry , University College London , 20 Gordon Street , London WC1H 0AJ , U.K
- School of Chemistry , Cardiff University , Main Building, Park Place , Cardiff , CF10 3AT , U.K
| |
Collapse
|
44
|
Agosta L, Brandt EG, Lyubartsev AP. Diffusion and reaction pathways of water near fully hydrated TiO 2 surfaces from ab initio molecular dynamics. J Chem Phys 2018; 147:024704. [PMID: 28711052 DOI: 10.1063/1.4991381] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Ab initio molecular dynamics simulations are reported for water-embedded TiO2 surfaces to determine the diffusive and reactive behavior at full hydration. A three-domain model is developed for six surfaces [rutile (110), (100), and (001), and anatase (101), (100), and (001)] which describes waters as "hard" (irreversibly bound to the surface), "soft" (with reduced mobility but orientation freedom near the surface), or "bulk." The model explains previous experimental data and provides a detailed picture of water diffusion near TiO2 surfaces. Water reactivity is analyzed with a graph-theoretic approach that reveals a number of reaction pathways on TiO2 which occur at full hydration, in addition to direct water splitting. Hydronium (H3O+) is identified to be a key intermediate state, which facilitates water dissociation by proton hopping between intact and dissociated waters near the surfaces. These discoveries significantly improve the understanding of nanoscale water dynamics and reactivity at TiO2 interfaces under ambient conditions.
Collapse
Affiliation(s)
- Lorenzo Agosta
- Department of Materials and Environmental Chemistry, Stockholm University, 10691 Stockholm, Sweden
| | - Erik G Brandt
- Department of Materials and Environmental Chemistry, Stockholm University, 10691 Stockholm, Sweden
| | - Alexander P Lyubartsev
- Department of Materials and Environmental Chemistry, Stockholm University, 10691 Stockholm, Sweden
| |
Collapse
|
45
|
Jeantelot G, Ould-Chikh S, Sofack-Kreutzer J, Abou-Hamad E, Anjum DH, Lopatin S, Harb M, Cavallo L, Basset JM. Morphology control of anatase TiO2 for well-defined surface chemistry. Phys Chem Chem Phys 2018; 20:14362-14373. [DOI: 10.1039/c8cp01983e] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Surface hydroxyls of titanium dioxide (anatase) are studied by infrared spectroscopy, density functional theory and nuclear magnetic resonance. They are found to be dependent on morphology and fluoride content.
Collapse
Affiliation(s)
- Gabriel Jeantelot
- Kaust Catalysis Center (KCC)
- Physical Science and Engineering Division (PSE)
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955-6900
- Saudi Arabia
| | - Samy Ould-Chikh
- Kaust Catalysis Center (KCC)
- Physical Science and Engineering Division (PSE)
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955-6900
- Saudi Arabia
| | - Julien Sofack-Kreutzer
- Kaust Catalysis Center (KCC)
- Physical Science and Engineering Division (PSE)
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955-6900
- Saudi Arabia
| | - Edy Abou-Hamad
- Kaust Catalysis Center (KCC)
- Physical Science and Engineering Division (PSE)
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955-6900
- Saudi Arabia
| | - Dalaver H. Anjum
- Imaging and Characterization Lab
- King Abdullah University of Science and Technology
- Thuwal 23955-6900
- Saudi Arabia
| | - Sergei Lopatin
- Imaging and Characterization Lab
- King Abdullah University of Science and Technology
- Thuwal 23955-6900
- Saudi Arabia
| | - Moussab Harb
- Kaust Catalysis Center (KCC)
- Physical Science and Engineering Division (PSE)
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955-6900
- Saudi Arabia
| | - Luigi Cavallo
- Kaust Catalysis Center (KCC)
- Physical Science and Engineering Division (PSE)
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955-6900
- Saudi Arabia
| | - Jean-Marie Basset
- Kaust Catalysis Center (KCC)
- Physical Science and Engineering Division (PSE)
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955-6900
- Saudi Arabia
| |
Collapse
|
46
|
Brandt IS, Plá Cid CC, Azevedo CGG, Pereira ALJ, Benetti LC, Ferlauto AS, Dias da Silva JH, Pasa AA. Influence of substrate on the structure of predominantly anatase TiO2films grown by reactive sputtering. RSC Adv 2018; 8:7062-7071. [PMID: 35540366 PMCID: PMC9078418 DOI: 10.1039/c7ra10974a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 02/06/2018] [Indexed: 02/02/2023] Open
Abstract
Revealing the crystalline structure of predominantly grown anatase TiO2films.
Collapse
Affiliation(s)
- Iuri S. Brandt
- Laboratório de Filmes Finos e Superfícies
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
- Programa de Pós-Graduação em Ciência e Engenharia de Materiais
| | - Cristiani C. Plá Cid
- Laboratório de Filmes Finos e Superfícies
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
| | | | | | - Luana C. Benetti
- Laboratório de Filmes Finos e Superfícies
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
| | - Andre S. Ferlauto
- Departamento de Física
- Universidade Federal de Minas Gerais
- Belo Horizonte
- Brazil
| | | | - André A. Pasa
- Laboratório de Filmes Finos e Superfícies
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
| |
Collapse
|
47
|
Chen H, Zhang X, Wang Q. Hydroconversion of C18 fatty acids using PtNi/Al2O3: Insight in the role of hydroxyl groups in Al2O3. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2017.04.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
|
48
|
Hirakawa H, Hashimoto M, Shiraishi Y, Hirai T. Selective Nitrate-to-Ammonia Transformation on Surface Defects of Titanium Dioxide Photocatalysts. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00611] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hiroaki Hirakawa
- Research
Center for Solar Energy Chemistry, and Division of Chemical Engineering,
Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - Masaki Hashimoto
- Research
Center for Solar Energy Chemistry, and Division of Chemical Engineering,
Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - Yasuhiro Shiraishi
- Research
Center for Solar Energy Chemistry, and Division of Chemical Engineering,
Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
- Precursory
Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
| | - Takayuki Hirai
- Research
Center for Solar Energy Chemistry, and Division of Chemical Engineering,
Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| |
Collapse
|
49
|
Unravelling water effects on solid acid catalysts: Case study of TiO 2 /SiO 2 as a catalyst for the dehydration of isobutanol. J Catal 2017. [DOI: 10.1016/j.jcat.2016.12.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|
50
|
|