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Cai Y, Wang J, Huang Z, Yu S, Hu Q, Zhou A. First-principles study of hydrogen sulfide decomposition on Sc-Ti 3C 2O 2 single-atom catalyst. J Mol Model 2024; 30:175. [PMID: 38771411 DOI: 10.1007/s00894-024-05974-5] [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: 03/18/2024] [Accepted: 05/13/2024] [Indexed: 05/22/2024]
Abstract
CONTEXT Hydrogen sulfide gas poses significant risks to both human health and the environment, with the potential to induce respiratory and neurological effects, and a heightened fatality risk at elevated concentrations. This article investigates the catalytic decomposition of H2S on a Sc-Ti3C2O2 single-atom catalyst(SAC) using the density functional theory-based first-principles calculation approach. Initially, the adsorption behavior of H2S on Ti3C2O2-MXene was examined, revealing weak physical adsorption between them. Subsequently, the transition metal atom Sc was introduced to the Ti3C2O2 surface, and its stability was studied, demonstrating high stability. Further exploration of H2S adsorption on Sc-Ti3C2O2 revealed direct dissociation of H2S gas molecules into HS* and H*, with HS* binding to Sc and H* binding to O on the Ti3C2O2 surface, resulting in OH groups. Using the transition state search method, the dissociation of H2S molecules on the SAC's surface was investigated, revealing a potential barrier of 2.45 eV for HS* dissociation. This indicates that the H2S molecule can be dissociated into H2 and S with the action of the Sc-Ti3C2O2 SAC. Moreover, the S atom left on the catalyst surface can aggregate to produce elemental S8, desorbing on the catalyst surface, completing the catalytic cycle. Consequently, the Sc-Ti3C2O2 SAC is poised to be an efficient catalyst for the catalytic decomposition of H2S. METHODS The Dmol3 module in Materials Studio software based on density functional theory is used in this study. The generalized gradient approximation method GGA-PBE is used for the exchange-correlation function. The complete LST/QST and the NEB methods in the Dmol3 module were used to study the minimum energy path of the dissociation of hydrogen sulfide molecules on the catalyst surface.
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Affiliation(s)
- Yixuan Cai
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454003, Henan Province, China
| | - Junkai Wang
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454003, Henan Province, China.
| | - Zhenxia Huang
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, 454003, Henan Province, China
| | - Shumin Yu
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454003, Henan Province, China
| | - Qianku Hu
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454003, Henan Province, China
| | - Aiguo Zhou
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454003, Henan Province, China
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Wang S, Cheng B, Fang X, Cao M, Xu X, Wang X. Electronegativity-dependent Pt anchoring and molecule adsorption for graphene-based supported Pt single atom. J Mol Model 2024; 30:138. [PMID: 38639819 DOI: 10.1007/s00894-024-05908-1] [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: 01/20/2024] [Accepted: 03/17/2024] [Indexed: 04/20/2024]
Abstract
CONTEXT To unravel the effects of the C vacancy, doping N type and number, the adsorption of HCHO and O2 was investigated on the graphene (Gr)-based supported Pt single atom by density functional theory calculations. The electronegativity of the vacancy and N-doped Gr was a crucial factor both for the anchoring for a Pt and the further adsorption of HCHO and O2 on the supported Pt. The electronegativity can be tuned by the C vacancy number (1V and 2V), the doping N type (graphitic-N, pyridinic-N and pyrrolic-N) and the doping pyridinic-N number (1N ~ 4N). The high electronegativity of the vacancy and N-doped Gr favored the anchoring for a Pt compared to the Gr, while too high electronegativity was detrimental for further adsorption of adsorbates on the supported Pt. The Bader charge analysis proved that the electronegativity followed the trend as pyrrolic-N > pyridinic-N > graphitic-N, and 4N-Gr > 2V-Gr > 3N-Gr > 2N-Gr > 1N-Gr > 1V-Gr > Gr. As a result, the pyridinic-N, the 1V-Gr, 1N-Gr and 2N-Gr with the suitable electronegativity achieved both stronger anchoring for a Pt and more favorable adsorption of HCHO and O2 on the supported Pt than the pristine Gr support. METHODS Periodic DFT calculation was performed using the VASP code. The PAW method and the GGA-PBE functionals were used. Part of work was also carried out by the DSPAW procedure of Device Studio.
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Affiliation(s)
- Shiyu Wang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, Institute of Rare Earths, School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Boxin Cheng
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, Institute of Rare Earths, School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Xiuzhong Fang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, Institute of Rare Earths, School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Meijuan Cao
- College of Printing and Packaging Engineering, Beijing Institute of Graphic Communication, Beijing, 102600, China.
| | - Xianglan Xu
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, Institute of Rare Earths, School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, Jiangxi, China.
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Khan MA, Kalsoom S, Ayub AR, Ilyas M, Hassan N, Irshad K, Zeshan M, Arshad S, Zahid MN, El-Fattah AA, Iqbal J. Host-guest coupling to potentially increase the bio-accessibility of 1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea by nanocarrier graphyne for brain tumor therapy, a comprehensive quantum mechanics study. J Mol Graph Model 2023; 123:108517. [PMID: 37235904 DOI: 10.1016/j.jmgm.2023.108517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 05/02/2023] [Accepted: 05/07/2023] [Indexed: 05/28/2023]
Abstract
This study aimed to explore the potential of Host-Guest coupling with Nanocarrier graphyne (GPH) to enhance the bioavailability of the drug 1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea (LUM) for brain tumor therapy. The electronic, geometric, and excited-state properties of GPH, LUM, and the graphyne@1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea-complex (GPH@LUM-complex) were studied using DFT B3LYP/6-31G** level of theory. The results showed that the GPH@LUM-complex was stable with negative adsorption energy (-0.20 eV), and there was good interaction between GPH and LUM in the solvent phase. The weak interaction forces between the two indicated an easy release of the drug at the target site. The Frontier Molecular Orbitals (FMO), Charge Density Analysis (CDA), and Natural Bond Orbital (NBO) analysis supported LUM to GPH charge transfer during complex formation, and the Reduced Density Gradient (RDG) isosurfaces identified steric effects and non-bonded interactions. UV-visible examination showed the potential of the GPH@LUM-complex as a drug carrier with a blue shift of 23 nm wavelength in the electronic spectra. The PET process analysis revealed a fluorescence-quenching process, facilitating systematic drug delivery. The study concluded that GPH had potential as a carrier for delivering LUM, and different 2D nanomaterials could be explored for drug delivery applications. The theoretical study's findings may motivate researchers to investigate the practical applications of GPH@LUM-complex in oncology.
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Affiliation(s)
- Maroof Ahmad Khan
- Key Laboratory of Clusters Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, PR China
| | - Shehwas Kalsoom
- Department of Chemistry, Concordia College Sahiwal, Pakistan
| | - Ali Raza Ayub
- Key Laboratory of Clusters Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, PR China
| | - Mubashar Ilyas
- Key Laboratory of Clusters Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, PR China
| | - Noor Hassan
- Key Laboratory of Clusters Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, PR China
| | - Kanwal Irshad
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Muhammad Zeshan
- Department of Pharmaceutical Chemistry, Government College University Faisalabad, Pakistan
| | - Salba Arshad
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Muhammad Nauman Zahid
- Department of Biology, College of Science, University of Bahrain, Sakhir, P.O. Box 32038, Bahrain
| | - Ahmed Abd El-Fattah
- Department of Chemistry, College of Science, University of Bahrain, Sakhir, P.O. Box 32038, Bahrain; Department of Materials Science, Institute of Graduate Studies and Research, Alexandria University, Alexandria, 21526, Egypt
| | - Javed Iqbal
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan; Department of Chemistry, College of Science, University of Bahrain, Sakhir, P.O. Box 32038, Bahrain.
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