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Pecoraro CM, Mino L, Kozyr E, Palmisano L, di Franco F, Loddo V, Santamaria M, Bellardita M. Pt-TiO 2 catalysts for glycerol photoreforming: comparison of anatase, brookite and rutile polymorphs. Chem Commun (Camb) 2024; 60:3782-3785. [PMID: 38436137 DOI: 10.1039/d4cc00353e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
We compared the H2 production from glycerol photoreforming for different TiO2 polymorphs, highlighting an increase of activity in the order Pt-rutile < Pt-P25 ≈ Pt-anatase < Pt-brookite with a different distribution of the reaction intermediates. We show that the highest ability to adsorb water and the different distribution of Pt active sites in brookite can positively influence its photoactivity.
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Affiliation(s)
- Claudio Maria Pecoraro
- Engineering Department, University of Palermo, Viale delle Scienze Ed. 6, Palermo, 90128, Italy.
| | - Lorenzo Mino
- Department of Chemistry and Interdepartmental Centre NIS, University of Torino, Via Giuria 7, Torino 10125, Italy.
| | - Elizaveta Kozyr
- Department of Chemistry and Interdepartmental Centre NIS, University of Torino, Via Giuria 7, Torino 10125, Italy.
| | - Leonardo Palmisano
- Engineering Department, University of Palermo, Viale delle Scienze Ed. 6, Palermo, 90128, Italy.
| | - Francesco di Franco
- Engineering Department, University of Palermo, Viale delle Scienze Ed. 6, Palermo, 90128, Italy.
| | - Vittorio Loddo
- Engineering Department, University of Palermo, Viale delle Scienze Ed. 6, Palermo, 90128, Italy.
| | - Monica Santamaria
- Engineering Department, University of Palermo, Viale delle Scienze Ed. 6, Palermo, 90128, Italy.
| | - Marianna Bellardita
- Engineering Department, University of Palermo, Viale delle Scienze Ed. 6, Palermo, 90128, Italy.
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Usoltsev O, Tereshchenko A, Skorynina A, Kozyr E, Soldatov A, Safonova O, Clark AH, Ferri D, Nachtegaal M, Bugaev A. Machine Learning for Quantitative Structural Information from Infrared Spectra: The Case of Palladium Hydride. Small Methods 2024:e2301397. [PMID: 38295064 DOI: 10.1002/smtd.202301397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 01/09/2024] [Indexed: 02/02/2024]
Abstract
Infrared spectroscopy (IR) is a widely used technique enabling to identify specific functional groups in the molecule of interest based on their characteristic vibrational modes or the presence of a specific adsorption site based on the characteristic vibrational mode of an adsorbed probe molecule. The interpretation of an IR spectrum is generally carried out within a fingerprint paradigm by comparing the observed spectral features with the features of known references or theoretical calculations. This work demonstrates a method for extracting quantitative structural information beyond this approach by application of machine learning (ML) algorithms. Taking palladium hydride formation as an example, Pd-H pressure-composition isotherms are reconstructed using IR data collected in situ in diffuse reflectance using CO molecule as a probe. To the best of the knowledge, this is the first example of the determination of continuous structural descriptors (such as interatomic distance and stoichiometric coefficient) from the fine structure of vibrational spectra, which opens new possibilities of using IR spectra for structural analysis.
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Affiliation(s)
- Oleg Usoltsev
- ALBA Synchrotron, Cerdanyola del Valles, Barcelona, 08290, Spain
| | | | - Alina Skorynina
- ALBA Synchrotron, Cerdanyola del Valles, Barcelona, 08290, Spain
| | | | - Alexander Soldatov
- Southern Federal University, Sladkova 178/24, Rostov-on-Don, 344090, Russia
| | - Olga Safonova
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen, 5232, Switzerland
| | - Adam H Clark
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen, 5232, Switzerland
| | - Davide Ferri
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen, 5232, Switzerland
| | - Maarten Nachtegaal
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen, 5232, Switzerland
| | - Aram Bugaev
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen, 5232, Switzerland
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