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Agosta L, Fiore L, Colozza N, Pérez-Ropero G, Lyubartsev A, Arduini F, Hermansson K. Adsorption of Glycine on TiO 2 in Water from On-the-fly Free-Energy Calculations and In Situ Electrochemical Impedance Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:12009-12016. [PMID: 38771331 PMCID: PMC11171457 DOI: 10.1021/acs.langmuir.4c00604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 05/09/2024] [Accepted: 05/13/2024] [Indexed: 05/22/2024]
Abstract
We report here an experimental-computational study of hydrated TiO2 anatase nanoparticles interacting with glycine, where we obtain quantitative agreement of the measured adsorption free energies. Ab initio simulations are performed within the tight binding and density functional theory in combination with enhanced free-energy sampling techniques, which exploit the thermodynamic integration of the unbiased mean forces collected on-the-fly along the molecular dynamics trajectories. The experiments adopt a new and efficient setup for electrochemical impedance spectroscopy measurements based on portable screen-printed gold electrodes, which allows fast and in situ signal assessment. The measured adsorption free energy is -30 kJ/mol (both from experiment and calculation), with preferential interaction of the charged NH3+ group which strongly adsorbs on the TiO2 bridging oxygens. This highlights the importance of the terminal amino groups in the adsorption mechanism of amino acids on hydrated metal oxides. The excellent agreement between computation and experiment for this amino acid opens the doors to the exploration of the interaction free energies for other moderately complex bionano systems.
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Affiliation(s)
- Lorenzo Agosta
- Department
of Chemistry-Ångström Laboratory, Uppsala University, Uppsala 751 21, Sweden
| | - Luca Fiore
- Department
of Science and Chemical Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica, Rome 00133, Italy
| | - Noemi Colozza
- Department
of Science and Chemical Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica, Rome 00133, Italy
| | - Guillermo Pérez-Ropero
- Department
of Chemistry-BMC, Uppsala University, Ridgeview
Instruments AB, Uppsala 752 37, Sweden
| | - Alexander Lyubartsev
- Department
of Materials and Environmental Chemistry, Stockholm University, Stockholm 106 91, Sweden
| | - Fabiana Arduini
- Department
of Science and Chemical Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica, Rome 00133, Italy
| | - Kersti Hermansson
- Department
of Chemistry-Ångström Laboratory, Uppsala University, Uppsala 751 21, Sweden
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Batool H, Majid A, Ahmad S, Mubeen A, Alkhedher M, Saeed WS, Al-Owais AA, Afzal A. Phase-Dependent Properties of Manganese Oxides and Applications in Electrovoltaics. ACS OMEGA 2024; 9:2457-2467. [PMID: 38250427 PMCID: PMC10795039 DOI: 10.1021/acsomega.3c06913] [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: 09/11/2023] [Revised: 12/13/2023] [Accepted: 12/15/2023] [Indexed: 01/23/2024]
Abstract
This study reports first-principles predictions as well as experimental synthesis of manganese oxide nanoparticles under different conditions. The theoretical part of the work comprised density functional theory (DFT)-based calculations and first-principles molecular dynamics (MD) simulations. The extensive research efforts and the current challenges in enhancing the performance of the lithium-ion battery (LIB) provided motivation to explore the potential of these materials for use as an anode in the battery. The structural analysis of the synthesized samples carried out using X-ray diffraction (XRD) confirmed the tetragonal structure of Mn3O4 on heating at 450 and 550 °C and the cubic structure of Mn2O3 on heating at 650 °C. The structures are found in the form of nanoparticles at 450 and 550 °C, but at 650 °C, the material appeared in the form of a nanoporous structure. Further, we investigated the electrochemical functionality of Mn2O3 and Mn3O4 as anode materials for utilization in LIBs via MD simulations. Based on the investigations of their electrical, structural, diffusion, and storage behavior, the anodic character of Mn2O3 and Mn3O4 is predicted. The findings indicated that 10 lithium atoms adsorb on Mn2O3, whereas 5 lithium atoms adsorb on Mn3O4 when saturation is taken into account. The storage capacities of Mn2O3 and Mn3O4 are estimated to be 1697 and 585 mAh g-1, respectively. The maximum value of lithium insertion voltage per Li in Mn2O3 is 0.93 and 0.22 V in Mn3O4. Further, the diffusion coefficient values are found as 2.69 × 10-9 and 2.65 × 10-10 m2 s-1 for Mn2O3 and Mn3O4, respectively, at 300 K. The climbing image nudged elastic band method (Cl-NEB) was implemented, which revealed activation energy barriers of Li as 0.30 and 0.75 eV for Mn2O3 and Mn3O4, respectively. The findings of the work revealed high specific capacity, low Li diffusion energy barrier, and low open circuit voltage for the Mn2O3-based anode for use in LIBs.
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Affiliation(s)
- Hira Batool
- Department
of Physics, University of Gujrat, Hafiz Hayat Campus, Gujrat 50700, Pakistan
| | - Abdul Majid
- Department
of Physics, University of Gujrat, Hafiz Hayat Campus, Gujrat 50700, Pakistan
| | - Sheraz Ahmad
- Department
of Physics, University of Gujrat, Hafiz Hayat Campus, Gujrat 50700, Pakistan
| | - Adil Mubeen
- Department
of Physics, University of Gujrat, Hafiz Hayat Campus, Gujrat 50700, Pakistan
| | - Mohammad Alkhedher
- Mechanical
and Industrial Engineering Department, Abu
Dhabi University, Abu Dhabi 59911, United Arab
Emirates
| | - Waseem Sharaf Saeed
- Department
of Restorative Dental Sciences, College of Dentistry, King Saud University, P.O. Box 60169, Riyadh 11545, Saudi Arabia
| | - Ahmad Abdulaziz Al-Owais
- Chemistry
Department, College of Science, King Saud
University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Aqeel Afzal
- Ryan
Institute’s Centre for Climate and Air Pollution Studies, Physics,
School of Natural Sciences, University of
Galway, Galway H91 TK33, Ireland
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Kosto Y, Barcaro G, Kalinovych V, Franchi S, Matvija P, Matolínová I, Prince KC, Matolín V, Skála T, Tsud N, Carravetta V. Role of the redox state of cerium oxide on glycine adsorption: an experimental and theoretical study. Phys Chem Chem Phys 2023; 25:6693-6706. [PMID: 36807663 DOI: 10.1039/d2cp06068j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The role of the oxidation state of cerium cations in a thin oxide film in the adsorption, geometry, and thermal stability of glycine molecules was studied. The experimental study was performed for a submonolayer molecular coverage deposited in vacuum on CeO2(111)/Cu(111) and Ce2O3(111)/Cu(111) films by photoelectron and soft X-ray absorption spectroscopies and supported by ab initio calculations for prediction of the adsorbate geometries, C 1s and N 1s core binding energies of glycine, and some possible products of the thermal decomposition. The molecules adsorbed on the oxide surfaces at 25 °C in the anionic form via the carboxylate oxygen atoms bound to cerium cations. A third bonding point through the amino group was observed for the glycine adlayers on CeO2. In the course of stepwise annealing of the molecular adlayers on CeO2 and Ce2O3, the surface chemistry and decomposition products were analyzed and found to relate to different reactivities of glycinate on Ce4+ and Ce3+ cations, observed as two dissociation channels via C-N and C-C bond scission, respectively. The oxidation state of cerium cations in the oxide was shown to be an important factor, which defines the properties, electronic structure, and thermal stability of the molecular adlayer.
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Affiliation(s)
- Yuliia Kosto
- Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, Prague, 18000, Czech Republic.
| | - Giovanni Barcaro
- Institute of Physical Chemical Processes-CNR, via Moruzzi 1, 56124 Pisa, Italy
| | - Viacheslav Kalinovych
- Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, Prague, 18000, Czech Republic.
| | - Stefano Franchi
- Elettra-Sincrotrone Trieste S.C.p.A., Area Science Park, Strada Statale 14, km 163.5, Basovizza (Trieste), 34149, Italy
| | - Peter Matvija
- Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, Prague, 18000, Czech Republic.
| | - Iva Matolínová
- Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, Prague, 18000, Czech Republic.
| | - Kevin C Prince
- Elettra-Sincrotrone Trieste S.C.p.A., Area Science Park, Strada Statale 14, km 163.5, Basovizza (Trieste), 34149, Italy
| | - Vladimír Matolín
- Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, Prague, 18000, Czech Republic.
| | - Tomáš Skála
- Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, Prague, 18000, Czech Republic.
| | - Nataliya Tsud
- Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, Prague, 18000, Czech Republic.
| | - Vincenzo Carravetta
- Institute of Physical Chemical Processes-CNR, via Moruzzi 1, 56124 Pisa, Italy
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Martínez-Bachs B, Rimola A. Prebiotic Peptide Bond Formation Through Amino Acid Phosphorylation. Insights from Quantum Chemical Simulations. Life (Basel) 2019; 9:life9030075. [PMID: 31527465 PMCID: PMC6789625 DOI: 10.3390/life9030075] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 09/08/2019] [Accepted: 09/09/2019] [Indexed: 12/11/2022] Open
Abstract
Condensation reactions between biomolecular building blocks are the main synthetic channels to build biopolymers. However, under highly diluted prebiotic conditions, condensations are thermodynamically hampered since they release water. Moreover, these reactions are also kinetically hindered as, in the absence of any catalyst, they present high activation energies. In living organisms, in the formation of peptides by condensation of amino acids, this issue is overcome by the participation of adenosine triphosphate (ATP), in which, previous to the condensation, phosphorylation of one of the reactants is carried out to convert it as an activated intermediate. In this work, we present for the first time results based on density functional theory (DFT) calculations on the peptide bond formation between two glycine (Gly) molecules adopting this phosphorylation-based mechanism considering a prebiotic context. Here, ATP has been modeled by a triphosphate (TP) component, and different scenarios have been considered: (i) gas-phase conditions, (ii) in the presence of a Mg2+ ion available within the layer of clays, and (iii) in the presence of a Mg2+ ion in watery environments. For all of them, the free energy profiles have been fully characterized. Energetics derived from the quantum chemical calculations indicate that none of the processes seem to be feasible in the prebiotic context. In scenarios (i) and (ii), the reactions are inhibited due to unfavorable thermodynamics associated with the formation of high energy intermediates, while in scenario (iii), the reaction is inhibited due to the high free energy barrier associated with the condensation reactions. As a final consideration, the role of clays in this TP-mediated peptide bond formation route is advocated, since the interaction of the phosphorylated intermediate with the internal clay surfaces could well favor the reaction free energies.
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Affiliation(s)
- Berta Martínez-Bachs
- Department de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
| | - Albert Rimola
- Department de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
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