{"title":"Molecular Insights into the Microscopic Behavior of CO2 Hydrates in Oceanic Sediments: Implications for Carbon Sequestration","authors":"Fengyi Mi, Wei Li, Jiangtao Pang, Othonas A. Moultos, Fulong Ning, Thijs J.H. Vlugt","doi":"10.1021/acs.jpcc.4c05413","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c05413","url":null,"abstract":"Knowledge of the microscopic behavior of CO<sub>2</sub> hydrates in oceanic sediments is crucial to evaluate the efficiency and stability of hydrate-based CO<sub>2</sub> sequestration in oceans. Here, systematic molecular dynamics simulations are executed to investigate the growth and dissociation of CO<sub>2</sub> hydrates, and the mechanical instability of CO<sub>2</sub> hydrate-Illite interface in the brine-urea-Illite system. Simulation results show that the CO<sub>2</sub> hydrate growth is jointly affected by the confined space, Illite surface properties, and presence of urea. Specifically, the interfacial H<sub>2</sub>O and the ion layer on the Illite surface hinder the growth of CO<sub>2</sub> hydrate crystals toward Illite surfaces. Urea molecules can bind salt ions and increase CO<sub>2</sub> concentrations in the water, thus kinetically promoting CO<sub>2</sub> hydrate growth. The dissociation of the CO<sub>2</sub> hydrate is affected by Illite surface properties and the CO<sub>2</sub> hydrate structure. CO<sub>2</sub> hydrate starts from the regions where hydrate particles are minimally in contact and extends on both sides. The mechanical tension and compression of the CO<sub>2</sub> hydrate-Illite interface exhibit nonlinear characteristics by changing the hydrogen bonds and the CO<sub>2</sub> hydrate structure. The molecular insight into the microscopic behavior of CO<sub>2</sub> hydrates in the brine-urea-Illite system contributes to a broader understanding of hydrate-based CO<sub>2</sub> sequestration.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":null,"pages":null},"PeriodicalIF":4.126,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Pseudo Two-Dimensional Model for the Design of Fast-Charging Lithium-Ion Battery Electrodes","authors":"Tianyuan Zhu, Huanyu Xie, Yuansen Xie, Shaoyun Zhou, Hongchang Jin, Hengxing Ji","doi":"10.1021/acs.jpcc.4c06158","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c06158","url":null,"abstract":"The demand for fast-charging lithium-ion batteries challenges traditional graphite anodes due to potential lithium plating risk. Phosphorus-based anodes offer a high theoretical capacity and better lithiation kinetics, potentially minimizing this risk. However, systematic studies on their lithium plating behavior and electrode design are lacking. We developed a pseudo two-dimensional model to assess how design parameters affect lithium plating in these anodes. Our findings suggest that phosphorus-based anodes allow safer electrode designs for fast charging than graphite. Increased areal capacity does not increase the lithium plating risk, which only occurs under very low porosity (<0.2) or larger particle sizes (>3.5 μm). The lithiation voltage curve slope increases with the charging rate, enabling the full cell to reach cutoff voltage quickly, preventing lithium deposition on the anode. These insights aid in creating fast-charging batteries with phosphorus-based anodes.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":null,"pages":null},"PeriodicalIF":4.126,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Dirac States versus Nearly-Free-Electron States in Ternary C2As6(1–x)P6x Monolayers – A Density Functional Theory Study","authors":"Amrendra Kumar, C. Kamal","doi":"10.1021/acs.jpcc.4c04414","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c04414","url":null,"abstract":"Using density functional theory-based calculations, we study the stability, geometric, and electronic properties of ternary C<sub>2</sub>As<sub>6(1–<i>x</i>)</sub>P<sub>6<i>x</i></sub> monolayers in a buckled honeycomb lattice. As the composition of P atoms (<i>x</i>) varies from 0 to 1 in steps of 1/6, we generated a total of 13 different possible geometric configurations. Binding energy calculations and <i>ab initio</i> molecular dynamics simulations under ambient conditions predict the stability of the ternary monolayers. Their electronic band structure and density of states calculations reveal a rich variety of electronic properties, ranging from semimetal to semiconducting or metallic, depending on the value of <i>x</i> and the crystal symmetry. The ternary C<sub>2</sub>As<sub>6(1–<i>x</i>)</sub>P<sub>6<i>x</i></sub> monolayers possess two distinct electronic dispersions near the Fermi level: a linear dispersion (Dirac cone) around the high-symmetry <i>K</i> point and a nearly-free-electron (NFE)-like parabolic dispersion around the high-symmetry Γ point in the Brillouin zone. Isoelectronic substitution breaks some spatial symmetries, causing the Dirac cones to become anisotropic and unpinned from the <i>K</i> point. It also leads to the opening of a small energy gap between the Dirac cone states. In contrast, the nature of the NFE-like parabolic dispersion remains nearly unaltered by the crystal symmetry. Notably, the minimum energy of the NFE band and the effective mass of the electron can be tuned by the composition of the ternary monolayers. Detailed orbital analysis reveals that the contributions of <i>s</i> and <i>p</i><sub><i>z</i></sub> orbitals of C atoms play a crucial role in tuning the NFE states. Overall, we reveal the novel and versatile electronic properties of the ternary monolayers and demonstrate their tunability via composition.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":null,"pages":null},"PeriodicalIF":4.126,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Menghao Bi, Xiang Li, Zhe Wang, Ruiyang Chen, Leichuang Zhu, Zhengxiao Du, Cheng Zhang, Yongping Du, Fang Wu
{"title":"Modulation of Semiconductor Doping of 2D GeSe in h-BN/GeSe van der Waals Heterostructure","authors":"Menghao Bi, Xiang Li, Zhe Wang, Ruiyang Chen, Leichuang Zhu, Zhengxiao Du, Cheng Zhang, Yongping Du, Fang Wu","doi":"10.1021/acs.jpcc.4c05079","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c05079","url":null,"abstract":"Herein, a novel controllable and nondestructive semiconductor doping technique is proposed by introducing defects in the h-BN/GeSe van der Waals heterostructure. A perfect n-/p-type channel layer can be achieved through charge transfer between the defective h-BN substrate layer and the GeSe channel layer. The effect of this modulation doping strategy on the carrier mobility of the channel layers is also investigated. In the case of the h-BN/GeSe heterostructure with the introduction of boron vacancies, the electron mobility of 2D GeSe in the <i>x</i> (<i>y</i>) direction is 1479.11 (1343.95) cm<sup>2</sup> V<sup>–1</sup> s<sup>–1</sup>, and the hole mobility in the <i>x</i> (<i>y</i>) direction is 1031.88 (864.44) cm<sup>2</sup> V<sup>–1</sup> s<sup>–1</sup>. As for producing nitrogen vacancies in the h-BN/GeSe heterostructure, the electron mobility of 2D GeSe in the <i>x</i> (<i>y</i>) direction is predicted to be as high as 1643.77 (1678.14) cm<sup>2</sup> V<sup>–1</sup> s<sup>–1</sup>, and the hole mobility in the <i>x</i> (<i>y</i>) direction is about 1129.51 (1563.50) cm<sup>2</sup> V<sup>–1</sup> s<sup>–1</sup>, respectively. In contrast, the electron (hole) mobility in the <i>x</i>-direction is dramatically decreased to 705.29 (630.85) cm<sup>2</sup> V<sup>–1</sup> s<sup>–1</sup>, and the electron (hole) mobility in the <i>y</i>-direction is only 701.40 (481.37) cm<sup>2</sup> V<sup>–1</sup> s<sup>–1</sup> for the GeSe layer by using the traditional semiconductor doping method. The nondestructive doping strategy provides an effective method to modulate two-dimensional semiconductor channel materials while avoiding lattice damage, thus resulting in much higher carrier mobility. It indicates that the novel semiconductor doping technique has a great promising application in electronic and optoelectronic devices.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":null,"pages":null},"PeriodicalIF":4.126,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nikolaj A. Zhestkij, Anastasiia S. Efimova, Maria Timofeeva, Alexander S. Novikov, Irina A. Gorbunova, Daria A. Shipilovskikh, Maksim V. Dmitriev, Sergei A. Shipilovskikh, Valentin A. Milichko
{"title":"Chemical Tuning of Second Harmonic Generation Efficiency in Aminothiophene-Based Molecular Microcrystals","authors":"Nikolaj A. Zhestkij, Anastasiia S. Efimova, Maria Timofeeva, Alexander S. Novikov, Irina A. Gorbunova, Daria A. Shipilovskikh, Maksim V. Dmitriev, Sergei A. Shipilovskikh, Valentin A. Milichko","doi":"10.1021/acs.jpcc.4c04885","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c04885","url":null,"abstract":"We report on a chemical way to tune the efficiency of second harmonic generation (SHG) by aminothiophene-based molecular crystals (MCs) of a fixed noncentrosymmetric crystal structure. Through the multistep synthesis of three substituted pyrrolo[1,2-<i>a</i>]thieno[3,2-<i>e</i>]pyrimidines, we design a set of MCs of a similar <i>Pna</i>21 space group, providing stable (over 30 min of continuous generation) SHG in a controlled visible spectral range. Substitution of the donor methyl component of the MC with neutral hydrogen and acceptor chlorine leads to an approximately 400-fold increase in SHG efficiency due to 70% growth of the MC's hyperpolarizability. The reported chemical strategy, thereby, opens the way to design MCs and tune their SHG efficiency, being competitive with commercial nonlinear optical crystals.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":null,"pages":null},"PeriodicalIF":4.126,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Juntao Kong, Zhengxin Yan, Wei Song, Weili Li, Zhaoqi Wang
{"title":"Strong Quantized Electron–Phonon Coupling Induced by the Unique LA Phonon Mode in 2D Kramers Semimetal InTe","authors":"Juntao Kong, Zhengxin Yan, Wei Song, Weili Li, Zhaoqi Wang","doi":"10.1021/acs.jpcc.4c04708","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c04708","url":null,"abstract":"Two-dimensional topological materials with flat bands and van Hove singularities in their electronic band structures are common, and these features may lead to superconductivity due to the strong condensation of electronic states. However, the electron–phonon coupling between flat bands and single longitudinal acoustic (LA) phonons has not been extensively studied or reported. In this work, using group theory, symmetry analysis, and first-principles calculations, we investigate flat electron bands, phonon spectra, and electron–phonon coupling in a two-dimensional metallic InTe monolayer. Our study reveals that the electron–phonon interaction in the intrinsic Kramers nodal line, with a van Hove singularity near the Fermi level, primarily involves a single LA phonon mode that couples strongly with the flat band electrons. This interaction leads to a slightly anisotropic superconducting gap function. Our findings provide new insights into the role of phonon-mediated electron interactions in superconductors with flat bands.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":null,"pages":null},"PeriodicalIF":4.126,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142451493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kevin Conley, Bjorn Mikladal, Bhushan Gadgil, Jarkko Etula, Taneli Juntunen, Ilkka Varjos, Antti J. Karttunen
{"title":"Dedoping of Carbon Nanotube Networks Containing Metallic Clusters and Chloride","authors":"Kevin Conley, Bjorn Mikladal, Bhushan Gadgil, Jarkko Etula, Taneli Juntunen, Ilkka Varjos, Antti J. Karttunen","doi":"10.1021/acs.jpcc.4c04024","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c04024","url":null,"abstract":"Doping carbon nanotube films improves their electrical conductivity and chemical stability. One conventional doping method is the in situ reduction of AuCl<sub>3</sub> and yet its beneficial properties on the electrical conductivity lessen once the films are thermally annealed. Here, density functional theory and semiclassical Boltzmann transport theory calculations show a deterioration of the electrical conductivity of a doped network of (8,0) carbon nanotubes as the Au<sub><i>n</i></sub> clusters (<i>n</i> ≤ 10) become larger or the Cl impurity concentration decreases. Between the smallest and largest cluster sizes, the conductivity along the nanotubes and across the junction dropped by 47 and 90% in metallic networks. The declines in semiconducting networks were 50 and 13%, respectively. The maximum electrical conductivity across the junction was for networks containing Au<sub>5</sub> clusters (193 times larger than the pristine network). Additionally, the electrical transport was reduced when Cl impurities were removed. Networks with excess Cl impurities had 9.6 and 36.7 times larger electrical conductivity along the nanotubes and across the junction than networks without impurities. Controlling the cluster size and Cl content would mitigate the dedoping of carbon nanotube films after thermal annealing.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":null,"pages":null},"PeriodicalIF":4.126,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142449836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"C═C Bond Hydrogenation vs C–O Bond Hydrogenolysis of Furfuryl Alcohol on Ru: A DFT Study","authors":"Aishwarya Kollamvalappil Narayanan, Devansh Kaushik, Shelaka Gupta","doi":"10.1021/acs.jpcc.4c05369","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c05369","url":null,"abstract":"Periodic density functional theory (DFT) simulations were used to thoroughly study the complete reaction network for the hydrogenation and hydrogenolysis of furfuryl alcohol (FA) on the Ru (0001) surface. The reaction pathways for the formation of tetrahydrofurfuryl alcohol (THFA), 1,2-pentanediol (1,2-PeD), 1,5-pentanediol (1,5-PeD), and 2-methyl furan (2-MF) from FA were established. In the most stable configuration, the FA ring was adsorbed parallel to the surface and centered over a hollow site with a binding energy of −180 kJ/mol. Hydrogenation of the FA ring was found to be the kinetically facile pathway for the formation of THFA. The byproducts 1,2-PeD and 1,5-PeD could be attributed to the outstanding C<sub>ring</sub>–O bond cleavage ability of the Ru metal. However, high activation barriers for further hydrogenation of the ring-opened products and alkyl C–O bond cleavage kinetically limited the formation of 1,2-PeD, 1,5-PeD, and 2-MF on Ru surface during the vapor-phase hydrodeoxygenation of FA.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":null,"pages":null},"PeriodicalIF":4.126,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142449833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Amel Derradji, Danillo Valverde, Éric Brémond, Ángel José Pérez-Jiménez, Yoann Olivier, Juan Carlos Sancho-García
{"title":"Searching the Best Double-Hybrid Density Functional to Correctly Predict the Singlet–Triplet Excited-State Inversion in Organic Systems","authors":"Amel Derradji, Danillo Valverde, Éric Brémond, Ángel José Pérez-Jiménez, Yoann Olivier, Juan Carlos Sancho-García","doi":"10.1021/acs.jpcc.4c03800","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c03800","url":null,"abstract":"The theoretically disclosed, and experimentally confirmed, energy inversion of the lowest singlet (<i>S</i><sub>1</sub>) and triplet (<i>T</i><sub>1</sub>) excited states of organic molecules (i.e., Hund’s rule violation) is investigated herein with the aid of modern and nonempirically derived double-hybrid (DH) density functionals, in the search of the best trade-off between accuracy and computational cost of viable electronic structure methods. For that purpose, we have selected a family of parameter-free expressions differing in their specific formulation (DFT-0DH, DFT-QIDH, DFT0-2, SOS1-DFT-0DH, SOS1-DFT-QIDH, SOS1-DFT0-2, RSX-DFT-0DH, RSX-DFT-QIDH, SOS1-RSX-DFT-0DH, and SOS1-RSX-DFT-QIDH) as well as in the underlying exchange–correlation functional used (PBE vs r<sup>2</sup>SCAN). For the sake of evaluating which DH can correctly describe the singlet–triplet excited-state energy inversion, second-order approximate with singles and doubles method with a spin-component scaling (SCS-CC2) and equation-of-motion coupled cluster singles and doubles (EOM-CCSD) calculations are also carried out. The results highlight the importance of the delicate balance between all the energy terms composing DH density functionals, with the correlation part being particularly significant for achieving the most accurate results. We have also derived a new DH density functional (PBE-DH-INVEST) exploiting that relationship, providing low error metrics and expected to yield robust results in, e.g., high-throughput studies.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":null,"pages":null},"PeriodicalIF":4.126,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142449288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}