Article
Chemistry, Physical
Wenjing Qin, Sanqiu Liu, Shuying Zhong, Bo Xu
Summary: The structural, mechanical, and electronic properties of Ni-Co-based layered transition oxide LiNixCo1-xO2 (x = 0.1-0.9) have been studied using the first-principles method. It is found that the effect of Ni/Co mixing on the structural property is slight. However, the mechanical strength of the materials is weaker than pure LiCoO2 and LiNiO2, while the ductility is improved. Cauchy pressure and anisotropy are also discussed, and the LNCO materials exhibit good electrical conductivity. This study provides insights into the modulation of mechanical properties and the formation mechanism of microcracks in electrode materials.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Guobao Yuan, Huaiyun Ge, Wenxiong Shi, Junli Liu, Yu Zhang, Xun Wang
Summary: A sub-1 nm nanosheets anode with MnZnCuOx-phosphomolybdic acid hybrid was successfully fabricated by introducing polyoxometalate (POM) clusters. The design exhibited excellent electrochemical performance in lithium-ion batteries, with high reversible capacity and admirable cycling stability at low and high current densities.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
K. Kannan, M. Kouthaman, P. Arjunan, R. Subadevi, M. Sivakumar
Summary: In this study, layered Cobalt (Co) substituted O3-type NaTi0.6Ni0.3Co0.1O2 (O3-NTNC) and P2-type Na0.5Ti0.6Ni0.3Co0.1O2 (P2-NTNC) anode materials were prepared for sodium ion batteries with good cycling performance and Coulombic efficiency. Partial Co-substitution enhanced the structural stability of the materials during sodiation and desodiation process.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Lifeng Cui, Haoyu Qi, Nannan Wang, Xin Gao, Chunyu Song, Jinghua Yang, Gang Wang, Shifeng Kang, Xiaodong Chen
Summary: Transition metal selenide is a potential material for the negative electrode of lithium-ion batteries due to its high density and conductivity. However, the large volume change during charging and discharging process leads to poor performance. CoSe/C-NS with N/S co-doping can address this issue and exhibit high capacity, high rate performance, and long-term cycle stability.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Engineering, Environmental
Lei Jiang, Fenghao Liang, Zhe Zhang, Daoning Wu, Jiali Chai, Tingting Luo, Ning Han, Wei Zhang, Yichuan Rui, Bohejin Tang
Summary: In this work, carbon-microsphere loaded with cobalt chloride hydrate (CCH@CM) was synthesized from ZIF-67 precursor using a collaborative and chlorination strategy. The resulting CCH@CM demonstrated superior electrochemical performance as a lithium-ion battery anode material, with high initial discharge capacity and minimal capacity attenuation rate. The porous structure derived from ZIF-67 provided a conductive path and alleviated volume expansion, while the presence of -Cl- / H2O groups offered active sites for the anchoring of Li+. The successful synthesis of CCH from ZIF-67 holds promise for large-scale applications in lithium-ion batteries.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Siwen Li, Xiayue Fan, Xiaorui Liu, Zequan Zhao, Wen Xu, Zhanyao Wu, Zhonghou Feng, Cheng Zhong, Wenbin Hu
Summary: In this work, a flexible and durable gel electrolyte was proposed to solve the problems of shape change and dendrite formation in zinc-nickel batteries. The gel electrolyte exhibited high ionic conductivity and a broad voltage window, leading to prolonged cycling life.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Yulei Sui, Bingjue Wang, Zhihao Shi, Xiaoping Zhang, Xiang Gao, Shengkui Zhong, Yu Xia, Ling Wu
Summary: With the proposal of carbon peaking and carbon neutrality goals, clean energy storage is attracting more and more attentions. In view of the lack of lithium resource in our earth, sodium-ion batteries are considered as the emerging and promising next-generation energy storage devices. Appropriate high-performance anode materials play a vital role in the development of sodium-ion batteries. The synergetic battery-capacitor characteristic of Ni-Co-P@TiO2-x material makes it become a promising anode for sodium-ion batteries.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Review
Energy & Fuels
Shuang Yuan, Qinghao Lai, Xiao Duan, Qiang Wang
Summary: With the development of society and technology, excessive energy consumption has led to resource and environmental problems. The new electric vehicle industry has been thriving in recent years, promoting the rapid development of electrochemical energy storage technology. Lithium-ion batteries and lithium-ion capacitors (LIBs and LICs) have become promising energy storage options due to their high energy and power density. Carbon materials, widely used as anode electrode materials for LIBs and LICs, offer benefits like large surface area, high conductivity, and stability. However, they often require modification to enhance their electrochemical performance. This article provides an overview of recent research advances in carbon-based anode materials and discusses key challenges and future prospects for lithium-ion storage.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Can Mi, Chang Luo, Zigang Wang, Yongguang Zhang, Shenbo Yang, Zhifeng Wang
Summary: A Cu/Ni co-doped Si-based anode material with a porous nanowire network structure is obtained through dealloying treatments. The porous structure allows the material to adapt to volume changes, and co-doping of Cu and Ni improves Li capture ability and electron migration rate. The material exhibits excellent electrochemical performance.
Article
Engineering, Environmental
Li-Feng Zhou, Xuan-Wen Gao, Tao Du, He Gong, Li-Ying Liu, Wen-Bin Luo
Summary: The performance of sodium ion batteries at low temperature is limited by slow diffusion of sodium ions within active materials and interfaces. Researchers have developed a strategy to improve the electronic structure and enhance battery performance by introducing interlayer anionic ligands in two-dimensional NbSSe nanoplates. This research provides promising results for the application of sodium ion batteries at low temperatures.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Yu-xin Chen, Hong-chang Liu, Wei-qi Xie, Ze Shen, Jin-lan Xia, Zhen-yuan Nie, Jian-ping Xie
Summary: Silica is a promising anode material for LIBs due to its high theoretical capacity, but its large volume variation and poor electrical conductivity limit its development. This study presents a new approach by combining SiO2 with a conductive phase and designing hollow porous structures. The DBS@C-Co composite, decorated with Co nanoparticles, exhibits a high reversible capacity of >620 mAh g(-1) after 270 cycles, thanks to the synergistic effect of the unique three-dimensional structure of diatom frustules, carbon layer, and Co nanoparticles. This work offers a new method for synthesizing metal/silica composites and provides new opportunities for the development of advanced active materials for LIBs.
Article
Chemistry, Physical
Kyeongseok Min, Kyutae Kim, Hyelin An, Yohan Go, Yeeun Lee, Dongwook Lim, Sung- Hyeon Baeck
Summary: This study demonstrates the development of high-performance anode materials for lithium-ion batteries using yolk-shell-structured SiO2@N, P co-doped carbon spheres. The optimized yolk size and co-doped carbon shells effectively alleviate the volume swelling of SiO2, leading to improved long cyclability. The SiO2@NPC Y.S. shows high capacity retention and reversible specific capacity over 300 cycles.
JOURNAL OF POWER SOURCES
(2022)
Article
Electrochemistry
Qifeng Lin, Zeyu Yuan, Dongyi Wang, Wei Wei, Xibin Wang, Wei Han, Lili Wang
Summary: This study successfully synthesized nitrogen-doped carbon nanosphere-encased cobalt selenide composite material as a anode for sodium-ion battery through an improved preparation method. The resulting material exhibited high initial discharge capacity, cycling stability, and rate performance.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Qiang Lu, Lian-Lian Zhang, Wei-Jiang Gong
Summary: Due to the abundant sodium resources and its low and stable price, sodium-ion batteries (NIBs) have promising applications in renewable energy storage. However, the lack of adequate anode materials hinders the development of high-performance NIBs. In this study, a novel AsC5 monolayer is suggested as a potential anode material for NIBs, showing excellent stability, adsorption energy, electric transportation, and charging/discharging capacity. The AsC5 materials have higher specific capacity than known 2D materials and exhibit strong cycle reversibility, making them a promising candidate for NIBs anodes.
JOURNAL OF POWER SOURCES
(2023)
Article
Materials Science, Multidisciplinary
Shuhua Hao, Yupeng Xing, Peiyu Hou, Gang Zhao, Jinzhao Huang, Shipeng Qiu, Xijin Xu
Summary: Flexible and secure aqueous energy storage devices are crucial for wearable energy storage. This study presents a Cu-doped Fe3O4 nanosheet with a 3D coral structure and a low-crystallization shell on the surface for enhanced ion transport. The newly developed CFPO electrode exhibits high capacity, and the assembled aqueous Ni-Fe batteries show high capacity and retention ratio. The aqueous quasi-solid-state batteries demonstrate remarkable energy density and power density.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Hongye Qin, Yukun Ye, Jinhong Li, Wenqi Jia, Siyu Zheng, Xuejie Cao, Guangliang Lin, Lifang Jiao
Summary: Nickel hydroxide has been identified as a promising electrocatalyst for urea oxidation reaction. By doping vanadium and creating oxygen vacancies, the catalyst's activity is enhanced by increasing the number of active sites and lowering the energy barrier for the reaction.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xuchun Chen, Siyu Zheng, Pei Liu, Zhiqin Sun, Kunjie Zhu, Haixia Li, Yongchang Liu, Lifang Jiao
Summary: It is demonstrated that utilizing fluorine to substitute oxygen atoms can enhance the air stability of manganese-based layered oxide cathode materials, thereby prolonging their lifespan in air.
Article
Chemistry, Physical
Qiuyu Shen, Yongchang Liu, Xudong Zhao, Junteng Jin, Xiaobai Song, Yao Wang, Xuanhui Qu, Lifang Jiao
Summary: Initiating anionic redox chemistry in layered sodium oxide cathodes is a prevalent method to break the capacity limit set by traditional transition metal redox. This study uncovers a Mn activation mechanism in a novel P2-Na0.80Li0.08Ni0.22Mn0.67O2 cathode, which achieves high discharge capacity and long cycling life by triggering anionic redox and reducing Mn through oxygen loss. The work elucidates the charge compensation mechanism and expands the horizons of oxygen redox chemistry for high-performance layered oxide cathode materials in sodium-ion batteries.
ADVANCED ENERGY MATERIALS
(2023)
Review
Chemistry, Physical
Kunjie Zhu, Zhiqin Sun, Zhaopeng Li, Pei Liu, Haixia Li, Lifang Jiao
Summary: Due to the higher freezing point of conventional aqueous electrolytes, the development and practical applications of aqueous rechargeable energy storage (ARES) at low temperature are limited. In this paper, the design principles for low-temperature ARES with excellent performance are discussed, especially in terms of electrode modification and electrolyte regulation. The related studies on low-temperature ARES are comprehensively summarized, and suggestions for addressing the current challenges are provided.
ADVANCED ENERGY MATERIALS
(2023)
Review
Electrochemistry
Zelin Wang, Chunwen Sun, Liang Lu, Lifang Jiao
Summary: Solid state Na-CO2 batteries are a promising energy storage system that utilizes excess CO2 for electrochemical energy storage. Despite their high theoretical energy densities, the practical application of Na-CO2 battery technology faces challenges such as short cycle life, high charging potential, poor rate performance, and lower specific full discharge capacity.
Article
Chemistry, Multidisciplinary
Xiayan Jian, Qiuyu Shen, Xudong Zhao, Junteng Jin, Yao Wang, Shengwei Li, Xuanhui Qu, Lifang Jiao, Yongchang Liu
Summary: This study reports a new type of ultrathin VOPO4 nanosheets as cathodes for sodium-ion batteries, achieving higher capacity and rate performance through redox reactions and ClO4- insertion/extraction. The mechanism of anionic redox reactions is elucidated, opening up a new avenue for high-energy phosphate cathodes for SIBs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Tongzhou Wang, Licheng Miao, Siyu Zheng, Hongye Qin, Xuejie Cao, Lei Yang, Lifang Jiao
Summary: This study demonstrates a simple synthesis of the Ni3N/Mo2N heterostructure and investigates urea-assisted electrolytic hydrogen production. The adsorption behavior of the urea molecule is analyzed, showing that -NH2 groups preferentially adsorb on Ni3N while C=O groups preferentially adsorb on Mo2N. The Ni3N/Mo2N heterostructure optimizes urea adsorption and enhances the hydrogen evolution reaction, leading to significantly lower voltage requirements and a 7 times higher hydrogen production rate in the urea-assisted water electrolyzer.
Article
Chemistry, Physical
Tianhao Wang, Shengwei Li, Xinger Weng, Lei Gao, Yu Yan, Ning Zhang, Xuanhui Qu, Lifang Jiao, Yongchang Liu
Summary: In this study, hierarchically porous V2O5 nanosheets vertically grown on carbon cloth were prepared, providing additional ion-diffusion channels and abundant active sites. The V2O5/C electrode exhibited exceptional high-rate capability and ultralong cycling durability in rechargeable aqueous zinc-based batteries. Moreover, the quasi-solid-state wearable zinc batteries employing the porous V2O5/C cathode demonstrated respectable performance even under severe deformations and low temperatures.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Pei Liu, Licheng Miao, Zhiqin Sun, Xuchun Chen, Yuchang Si, Qinglun Wang, Lifang Jiao
Summary: This study proposes an integrated multifunctional solid electrolyte interphase (SEI) with inorganic/organic hybrid construction to enhance the durability of sodium metal anode. The inorganic components improve ionic conduction efficiency and inhibit dendrite formation, while the organic component forms a dense and elastic membrane structure to prevent fracture and delamination issues. Experimental results show that the proposed SEI can achieve stable cycling over 2000 hours at a high current density, with a very low voltage hysteresis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Pei Liu, Tiantian Zhan, Xuchun Chen, Haixia Li, Qinglun Wang, Wenbo Lu, Lifang Jiao
Summary: O3-type layered oxides have great potential as cathode materials for sodium-ion batteries, but their practical applications are hindered by structural instability and irreversible phase transitions. This study demonstrates a feasible strategy to construct stabilized O3-type layered oxides by doping with a transition metal ion (Zn2+), which improves capacity retention and lifespan, offering a promising approach for high-performance sodium-ion batteries.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Yao Wang, Xudong Zhao, Junteng Jin, Qiuyu Shen, Yang Hu, Xiaobai Song, Han Li, Xuanhui Qu, Lifang Jiao, Yongchang Liu
Summary: This study unravels the reductive coupling mechanism (RCM) in a novel P2-Na0.8Cu0.22Li0.08Mn0.67O2 cathode, which boosts the reversibility and kinetics of anionic redox reactions. The formation of strong covalent Cu-(O-O) bonding effectively suppresses excessive oxygen oxidation and irreversible cation migration, resulting in a cathode with remarkable rate capability and long-term cycling stability.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Tao Zhang, Ji Kong, Chao Shen, Shengjie Cui, Zezhou Lin, Yuyu Deng, Minghao Song, Lifang Jiao, Haitao Huang, Ting Jin, Keyu Xie
Summary: This study introduces acetic acid in layered cathode materials to form sodium acetate and successfully achieves efficient sodium compensation. Based on sodium compensation, the capacity retention and energy density of the battery have been significantly improved.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Han Li, Yao Wang, Xudong Zhao, Junteng Jin, Qiuyu Shen, Jie Li, Yukun Liu, Xuanhui Qu, Lifang Jiao, Yongchang Liu
Summary: Natriumsuperionic conductor (NASICON)-type phosphates with 3D open frameworks have attracted attention as cathodes for sodium-ion batteries. However, they suffer from mediocre energy density and rapid capacity decay. In this study, a multielectron reaction and low-strain Na(3.5)Fe(0.5)V-Cr-0.5(PO4)(3)/C cathode material was designed, which exhibited high working voltage, high reversible capacity, and high cycling stability.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Tongzhou Wang, Licheng Miao, Siyu Zheng, Hongye Qin, Xuejie Cao, Lei Yang, Lifang Jiao
Summary: In this study, a simple synthesis of Ni3N/Mo2N heterostructure was reported, and urea-assisted electrolytic hydrogen production was systematically investigated. It was found that the -NH2 and C=O groups of the urea molecule were more easily adsorbed on Ni3N and Mo2N, respectively. The Ni3N/Mo2N heterostructure optimized the adsorption of urea and improved the hydrogen evolution reaction performance, leading to a much lower voltage (1.36 V @ 10 mA cm-2) and a 7 times higher hydrogen production rate in the urea-assisted water electrolyzer.
Article
Chemistry, Multidisciplinary
Chen Chen, Tianhao Wang, Xudong Zhao, Aiduo Wu, Shengwei Li, Ning Zhang, Xuanhui Qu, Lifang Jiao, Yongchang Liu
Summary: The study demonstrates the fabrication of OH-termination-rich V₂CTx material with interlayer K+-pillars (alk-V₂CTx) using a one-step alkalization method. The alk-V₂CTx cathode exhibits excellent reversibility and rapid Li+/Zn2+ co-insertion/extraction electrochemistry, along with superior rate performance and exceptional cycling life. The study also investigates the hybrid-ion storage mechanisms and presents flexible quasi-solid-state rechargeable Zn batteries with inspiring energy output even under severe deformation conditions and low temperatures.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Sergey Yu. Ketkov, Sheng-Yuan Tzeng, Elena A. Rychagova, Anton N. Lukoyanov, Wen-Bih Tzeng
Summary: Metallocenes, including methylcobaltocene, play important roles in various fields of chemistry. The ionization energy and vibrational structure of (Cp ')(Cp)Co can be influenced by introducing methyl substituents. The mass-analyzed threshold ionization spectrum and DFT calculations provide accurate information about the properties and transformations of (Cp ')(Cp)Co.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Review
Chemistry, Physical
Qifeng Mu, Jian Hu
Summary: Polymer mechanochemistry has experienced a renaissance due to the rapid development of mechanophores and principles governing mechanochemical transduction or material strengthening. It has not only provided fundamental guidelines for converting mechanical energy into chemical output, but also found applications in engineering and smart devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Da Hye Yang, Francesco Ricci, Fredrik L. Nordstrom, Na Li
Summary: Through systematic evaluation of the oiling-out behavior of procaine, we identified both stable and metastable liquid-liquid phase separation, and established phase diagrams to assist in rational selection of crystallization strategies.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Vikki Anand Varma, Simmie Jaglan, Mohd Yasir Khan, Sujin B. Babu
Summary: Designing engineering structures like nanocages, shells, and containers through self-assembly of colloids is a challenging problem. This work proposes a simple model for the subunit, which leads to the formation of monodispersed spherical cages or containers. The model with only one control parameter can be used to design cages with the desired radius.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Hainan Jiang, Yaolong He, Xiaolin Li, Zhiyao Jin, Huijie Yu, Dawei Li
Summary: The cycling lifespan and coulombic efficiency of lithium-ion batteries are crucial for high C-rate applications. The Li-ion concentration plays a crucial role in determining the mechanical integrity and structural stability of electrodes. This study focuses on graphite as the working electrode and establishes an experimental system to investigate the mechanical properties of composite graphite electrode at different C-rates. Considering the effect of Li-ion concentration in stress analysis is found to be significant.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Zhiye Wang, Yunchuan Li, Mingjun Sun
Summary: This study investigates the influence of intramolecular pi-pi interactions on the electronic transport capabilities of molecules. By designing and analyzing three pi-conjugated molecules, the researchers observe that different pi-conjugated structures have varying effects on electron transport. The findings provide a theoretical foundation for designing single-molecule electronic devices with multiple electron channels based on intramolecular pi-pi interactions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Yuandong Xu, Haoyang Feng, Chaoyang Dong, Yuqing Yang, Meng Zhou, Yajun Wei, Hui Guo, Yaqing Wei, Jishan Su, Yingying Ben, Xia Zhang
Summary: Hollow MoS2 cubes and spheres were successfully synthesized using a one-step hydrothermal method with the hard template method. The hollow MoS2 cubes exhibited higher specific capacitance and energy density compared to the hollow MoS2 spheres. The symmetrical supercapacitors assembled with these hollow structures showed good performance and high capacity retention after multiple cycles. These findings suggest that controlling the pore structure and surface characteristics of MoS2 is crucial for enhancing its electrochemical properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Ainhoa Oliden-Sanchez, Rebeca Sola-Llano, Joaquin Perez-Pariente, Luis Gomez-Hortiguela, Virginia Martinez-Martinez
Summary: The combination of photoactive molecules and inorganic structures is important for the development of advanced materials in optics. In this study, bulky dyes were successfully encapsulated in a zeolitic framework, resulting in emission throughout the visible spectrum.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Miaomiao Zhang, Cunyuan Pei, Qiqi Xiang, Lintao Liu, Zhongxu Dai, Huijuan Ma, Shibing Ni
Summary: The design of a solid electrolyte interphase (SEI) plays a crucial role in improving the electrochemical performance of anode materials. In this study, lithium difluoro(oxalate)borate (LiDFOB) is used as an electrolyte additive to form a protective SEI film on Li3VO4 (LVO) anodes. The addition of LiDFOB results in a dense, uniform, stable, and LiF-richer SEI, which enhances the Li-ion storage kinetics. The generated SEI also prevents further decomposition of the electrolyte and maintains the morphology of LVO anodes during charge/discharge processes. This work demonstrates the effectiveness of LiDFOB as a multi-functional additive for LiPF6 electrolytes and provides insights into SEI construction for high-performance LVO anodes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
B. V. Andryushechkin, T. V. Pavlova, V. M. Shevlyuga
Summary: The atomic structure of the Ag(111)-p(4 x 4)-O phase was reexamined and two phases with the same periodicity were discovered. It was demonstrated that the accepted Ag6 model is incompatible with high-resolution oxygen-sensitive STM images.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
S. L. Romo-Avila, D. Marquez-Ruiz, R. A. Guirado-Lopez
Summary: In this study, we used density functional theory (DFT) calculations to investigate the interaction between model graphene oxide (GO) nanostructures and chlorine monoxide ClO. We aimed to understand the role of this highly oxidizing species in breaking C-C bonds and forming significant holes on GO sheets. Our results showed that C-C bonds in a single graphene oxide sheet can be broken through a simple mechanism involving the dissociation of two chemically attached ClO molecules. The formation of carbonyl groups and holes on the GO surface was also observed. This study provides important insights into the degradation of carbon nanotubes and the stability of GO during the myeloperoxidase (MPO) catalytic cycle.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Alberto Garcia-Fernandez, Birgit Kammlander, Stefania Riva, Hakan Rensmo, Ute B. Cappel
Summary: In this study, the X-ray stability of five different lead halide perovskite compositions (MAPbI3, MAPbCl3, MAPbBr3, FAPbBr3, CsPbBr3) was investigated using photoelectron spectroscopy. Different degradation mechanisms and resistance to X-ray were observed depending on the crystal composition. Overall, perovskite compositions based on the MA+ cation were found to be less stable than those based on FA+ or Cs+. Metallic lead formation was most easily observed in the chloride perovskite, followed by bromide, and very little in MAPbI3. Multiple degradation processes were identified for the bromide compositions, including ion migration, formation of volatile and solid products, as well as metallic lead. CsBr was formed as a solid degradation product on the surface of CsPbBr3.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Timofei Rostilov, Vadim Ziborov, Alexander Dolgoborodov, Mikhail Kuskov
Summary: The shock-loading behavior of nanomaterials is investigated in this study. It is found that shock compaction waves exhibit a distinct two-step structure, with the formation of faster precursor waves that travel ahead of the main compaction waves. The complexity of the shock Hugoniot curve of the tested nanomaterial is described, and the effect of initial porosity on the compressed states is demonstrated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Sergey S. Nikitin, Alexander D. Koryakov, Elizaveta A. Antipinskaya, Alexey A. Markov, Mikhail V. Patrakeev
Summary: The stability of La1/3Sr2/3Fe1-xMnxO3-delta, a perovskite-type oxide, under reducing conditions is dependent on the manganese content. Increasing the manganese content leads to a decrease in stability. The behavior of iron and manganese in the oxide shows distinct differences, which can be attributed to the difference in the enthalpy of oxidation reactions. Additionally, the change in the La/Sr ratio affects the concentration of iron and manganese ions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Mosayeb Naseri, Shirin Amirian, Mehrdad Faraji, Mohammad Abdur Rashid, Maicon Pierre Lourenco, Venkataraman Thangadurai, D. R. Salahub
Summary: Inspired by the successful transfer of freestanding ultrathin films of SrTiO3 and BiFeO3, this study assessed the structural stability and investigated the electronic, optical, and thermoelectric properties of a group of two-dimensional perovskite-type materials called perovskenes. The findings revealed that these materials are wide bandgap semiconductors with potential application in UV shielding. Moreover, they exhibit better electrical and thermal conductivity at high temperatures, enabling efficient power generation in thermoelectric devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
