Article
Chemistry, Physical
Zhihao Li, Xiucai Sun, Xiaoli Sun, Wan-Jian Yin, Zhongfan Liu
Summary: This study investigated the impact of substrate characteristics on the quality of graphene and found that the crystallographic orientation of the metal substrate, such as Cu (100), is crucial for producing high-quality and superclean graphene. The study also identified that low graphene defect density and high nucleation rate on the Cu(100) facet contribute to the suppression of amorphous carbon formation and facilitate rapid graphene synthesis.
Article
Energy & Fuels
Bhanu Chettri, Prasanta Kumar Patra, Zosiamliana Renthlei, Amel Laref, Dibya Prakash Rai
Summary: The hydrogen storage properties of the bilayer h-BN/Gr heterostructure were studied using density functional theory calculations. The results show that the material has the potential to be used for hydrogen storage, with high gravimetric density and modulation of adsorption by van der Waals and electrostatic interactions.
Article
Chemistry, Physical
Kareem M. Gameel, Ahmed Huzayyin, Francis Dawson
Summary: Molecular simulations have been crucial in developing analytical models for microporous supercapacitor electrodes. In this study, a computationally feasible density functional theory (DFT) based approach is introduced to simulate 2D slit pores with highly confined ions, capturing vital quantum mechanical details. The simulations provide atomic-level insights into the pore and ion structures, charge distribution, and quantum capacitance (C-q), complementing existing models and offering a comprehensive understanding of the interplay between pore morphology, pore-ion interactions, and capacitance. The proposed model is a significant advancement in the resolution of modeling microporous slit pore systems, with implications for optimizing electrolytes and pore materials in microporous electrochemical double-layer capacitors.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Crystallography
Ran Hu, Wei-Chao Zhang, Wei-Feng Sun
Summary: By calculating the adsorption configurations, electronic structures, and net spins of graphene adsorbing 4d transition atoms, this study explores the magnetic modification caused by decorating metal atoms on graphene. The adsorption of Y, Zr, and Nb atoms involves ionic bonds with evident charge transfer, while Mo, Tc, Ru, and Rh atoms form covalent-like bonds with graphene carbon atoms due to orbital hybridization. The introduction of 4d transition atoms leads to alterations in the electronic band character and the emergence of net spin magnetism in the graphene system.
Article
Chemistry, Physical
Yue Li, Hongbo Zeng, Hao Zhang
Summary: In this study, the effect of impurity metal doping on the initial stage of calcite growth was investigated using first-principles methods. The adsorption of the CaCO3 molecule on anhydrous and hydrated calcite surfaces doped with Mg, Cu, Zn, Sr, and Ba was analyzed, as well as the interactions between water molecules and the different dopants. The results suggest that the adsorption ability of anhydrous calcite surfaces towards the CaCO3 molecule is determined by the size of the dopant, while the adsorption behavior for water molecules is dominated by chemical bonding. The study provides new insights into the inhibiting mechanism of Mg, Cu, and Zn impurities on calcite growth and highlights the feasibility of using Sr and Ba dopants to facilitate calcite growth and mineralize toxic Sr and Ba from contaminated environments.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Kaishuai Yang, Dayong Liu, Yiling Sun, Zhengfang Qian, Shengkui Zhong, Renheng Wang
Summary: The study identified Fe-N-4@graphene as a promising anchoring material for adsorbing NaPSs and improving the efficiency of Na-S batteries. The doping of transition metal iron significantly enhances electronic conductivity and adsorption strength, while reducing decomposition energies, thereby promoting battery performance. This research provides insights into the anchoring mechanism and electrocatalytic effects, which could benefit the development of high-performance Na-S batteries.
Article
Chemistry, Physical
Yu-Tao Feng, Han-Bing Li, Zhi-Gang Shao
Summary: Through first-principles calculations based on density functional theory, it was found that F-2 can form eight stable adsorption configurations on penta-graphene (PG), divided into physical adsorption and chemical adsorption types. The strong interaction of F-2 adsorbed on PG significantly impacts the electronic properties of PG, making PG a potentially sensitive sensor for F-2. These results provide a new direction for studying the regulation of electronic properties of PG, enhancing its application prospects in electronic devices and photocatalysis.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Anqi Yang, Jiaolian Luo, Zhenyu Xie
Summary: The graphene/ZnV2O6(001) heterojunction, modified by graphite, shows potential in improving CO2 reduction efficiency through optimized energy band structure and charge transfer to inhibit carrier recombination. The good combination of ZnV2O6(001) and graphene enhances charge transfer and photocatalytic efficiency under visible light irradiation, providing a basis for designing vanadate-based semiconductor heterostructures in photocatalysts and solar cells.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Multidisciplinary
Yuefei Huang, Tariq Altalhi, Boris I. Yakobson, Evgeni S. Penev
Summary: Carbon and hydrogen bonding are crucial for life and play an important role in graphene. Researchers have designed nucleobase-bonded graphene nanoribbons and discovered interesting conductance properties, with the guanine-cytosine junction showing superior performance. The findings offer guidance for experimental realization.
Article
Materials Science, Multidisciplinary
Lin Wei, GuiLi Liu, JiaXin Wang, GuoYing Zhang
Summary: In this paper, a topologically insulated GNR model with metallicity is constructed and its electronic properties are calculated based on density functional theory. The metallicity of the GNR is regulated by introducing zero modes and adjusting the bond length.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Chemistry, Physical
Monika Srivastava, Anurag Srivastava
Summary: The ability of pristine graphene and copper decorated boron/nitrogen doped graphene to detect arsenic in water environments was computationally analyzed, revealing that the response of Cu-NG nanosheets to arsenic increased by 189% compared to the pristine sheet, indicating their potential as arsenic detectors in aqueous environments.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Zhong-Peng Zhou, Ning-Jing Hao, Qian-Kui Zhang, Xiao-Hui Deng, Hui Zhang, Zhen-Kun Tang, Chuan-Jia Tong
Summary: In this paper, the microstructure and electronic properties of metal phthalocyanines (MPc, M = Fe, Co, Ni) supported on single-walled carbon nanotubes (SWCNTs) were systematically investigated using density functional theory (DFT) simulations. The effects of three SWCNTs substrates with different diameters on the catalytic activity were also explored. The results showed that SWCNTs substrate can cause the bending of MPc and the increase of the diameter of the SWCNTs strengthens the adsorption to MPc molecules, which enlarges the N-Metal-N (N-M-N) angles of the MPc structure, leading to improved catalytic activity. The introduction of SWCNTs substrate improves the conductivity of MPc molecules and changes the N-M-N angles of MPc, which in turn optimizes the bonding strength between MPc and oxygen-containing intermediates and improves the catalytic activity. These findings are expected to be employed in more planar molecular complexes catalyzed reactions.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Ana S. Dobrota, Jovana Vlahovic, Natalia V. Skorodumova, Igor A. Pasti
Summary: This study investigates the interaction between aluminum and non-doped and N-doped graphene nanoribbons using DFT calculations. The results show that selectively doped graphene nanoribbons with pyridinic N can enhance aluminum storage capacity, while Al,N-containing graphene nanoribbons with pyridinic N can be used in resistive sensors for mechanical deformation.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Yu-Qi Chen, Huan-Huan Zhang, Bo Wen, Xi-Bo Li, Xiao-Lin Wei, Wen-Jin Yin, Li-Min Liu, Gilberto Teobaldi
Summary: This study extensively investigates the electronic properties and Schottky barrier height (E-SBH) of several vdW Janus MXY/graphene heterostructures through first-principles simulations. The results reveal that by modifying the composition and geometry of the heterostructure's interface, the electrical contact can be controlled, with a potential variation of up to a factor of seven in the E-SBH.
DALTON TRANSACTIONS
(2022)
Article
Nanoscience & Nanotechnology
Huinan Hou, Vignesh Murugadoss, Zhuofan Qin, Ding Wang, Yifan Li, Ben Bin Xu
Summary: In this study, the binding ability of high-strength graphene to Al, Cu, Zn, Li, and Mg atoms was analyzed by first-principle calculations. The adsorption of metal atoms causes lattice distortion and Al, Cu, and Li atoms show good adsorption potential on graphene. The explicit electronic interaction between metal atoms and carbon atoms results in different adsorption energies. The mechanical properties of the interface structure between (111) crystal plane and graphene were also studied.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Article
Chemistry, Physical
Wenbin Wu, Zeping Shi, Yuhan Du, Yuxiang Wang, Fang Qin, Xianghao Meng, Binglin Liu, Yuanji Ma, Zhongbo Yan, Mykhaylo Ozerov, Cheng Zhang, Hai-Zhou Lu, Junhao Chu, Xiang Yuan
Summary: The manuscript reports experimental observations of a Lifshitz transition in a topological insulator HfTe5 under a strong magnetic field, leading to the formation of one-dimensional Weyl modes in a three-dimensional material. By tracking the Landau level transitions, the study demonstrates that band inversion drives the crossing of zeroth Landau bands and the formation of a one-dimensional Weyl mode. This transition occurs at 21 T and moves the Weyl mode close to the Fermi level.
Article
Chemistry, Multidisciplinary
Sicheng Lu, Fang Yin, Yujia Wang, Nianpeng Lu, Lei Gao, Huining Peng, Yingjie Lyu, Youwen Long, Jia Li, Pu Yu
Summary: This study explores the structural phase transition of brownmillerite SrCoO2.5 and its influencing factors. It is found that using aqueous alkali as the electrolyte can trigger a rapid transition, while the acid solution with rich protons can also induce an unexpected phase transition in a faster manner. Theoretical calculations reveal that this transition is caused by a proton-assist ionic disproportionation.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Dongsheng Xia, Xuan Tang, Sheng Dai, Rile Ge, Alexander Rykov, Junhu Wang, Tzu-Hsi Huang, Kuan-Wen Wang, Yinping Wei, Kai Zhang, Jia Li, Lin Gan, Feiyu Kang
Summary: By conducting high-temperature synthetic chemistry between 1100 and 1200 degrees C, the catalytic and storage stability of Fe-N-C materials have been greatly improved. The optimized catalyst shows excellent stability in proton exchange membrane fuel cells, with over 80% performance retention after 30 hours under H-2/O-2 condition and no activity loss after 35 days of storage, while maintaining competitive oxygen reduction reaction activity and fuel cell performance.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Chenze Chai, Qinghai Shu, Qiang Su, Jian Wang, Xijuan Lv, Dongxu Wang, Lixiang Zhong
Summary: The combination of 3-nitro-1,2,4-triazol-5-one (NTO) and ammonium perchlorate (AP) can effectively harness the advantages of both materials. By employing density functional theory (DFT) and ab initio molecular dynamic (AIMD) studies, the interaction mechanism between NTO and AP on multiple scales has been investigated. The results show that the combination of NTO and AP can form an excellent NTO/AP co-crystal with high feasibility.
Article
Chemistry, Analytical
Xubin Lu, Xin Yang, Limin Wang, Fan Li, Haojie Zhang, Jia Li, Lingxing Zan, Michael Bron
Summary: Nitrogen-doped carbon nanotubes deposited on nickel foam are investigated as catalysts for hydrogen and oxygen evolution reactions. The study shows that nitrogen-doped carbon nanotubes with high amounts of graphitic nitrogen have the potential to improve hydrogen electrocatalytic performance and provides a direction for designing better carbon nanotube defects to enhance electrochemical performance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Xiongwei Zhong, Yangfan Shao, Biao Chen, Chuang Li, Jinzhi Sheng, Xiao Xiao, Baomin Xu, Jia Li, Hui-Ming Cheng, Guangmin Zhou
Summary: A three-electrode rechargeable zinc-air battery (T-RZAB) with decoupled cathodes and a zinc-free anode is developed to solve the problems of opposing requirements for oxygen reduction/evolution reactions and zinc corrosion. The T-RZAB exhibits a high discharge capacity per cycle, low voltage gap, and ultralong cycle life. A large T-RZAB with no significant degradation after cycling for 1000 hours is also achieved. Moreover, a T-RZAB pack with high energy density and low cost is assembled.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Yinping Wei, Zhichao Zhang, Chao Mei, Junyang Tan, Ziqiang Wang, Jia Li, Lin Gan
Summary: Transition-metal spinel oxides have shown great potential as high-performance electrodes for electrochemical energy storage and conversion. The irreversible or reversible spinel-rocksalt phase transformation at the oxide surface plays a crucial role in determining their performance. In this study, using Co3O4 nanoparticles as an example, the in situ atomic-scale imaging technique was employed to investigate the spinel-rocksalt transformation. It was found that the transformation is not only influenced by the oxygen vacancy formation energy but also strongly dependent on the surface polarity, with faster transformation observed at the (001) surface compared to the (111) surface.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Yunsong Yin, Xinyu Zhang, An Li, Jing Lyu, Lixiang Zhong, Ruibin Liu
Summary: In situ online composition detection is highly desirable in the iron and steel industry due to the complexity of ore composition. A laser-induced breakdown spectroscopy (LIBS) system is used to determine the real-time iron content. By combining support vector machine (SVM) with multivariate partial least-squares regression (PLSR), a linear relationship between spectral data and typical element content is established to predict iron content with an error of 1.6%. The study also reveals the change in elemental distribution content at different depths in the raw ore, demonstrating the method's accuracy and effectiveness in online iron content prediction.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Xi Wu, Chao Ruan, Peizhe Tang, Feiyu Kang, Wenhui Duan, Jia Li
Summary: The theoretically predicted gapped surface state of antiferromagnetic topological insulator MnBi2Te4 has been experimentally observed to have a smaller or even gapless surface state, which is caused by the defects in MnBi2Te4. The study identifies antisite Mn-Bi and Bi(Mn) as dominant defects and reveals their evolution during the phase transition from MnTe/Bi2Te3 to MnBi2Te4. It is found that complete elimination of Mn(Bi) and Bi-Mn defects in MnBi2Te4 through simple annealing is almost impossible due to high migration barrier in kinetics. Moreover, increasing concentration of Mn-Bi and Bi-Mn defects in MnBi2Te4 monolayer leads to the elimination of gap in the Dirac point-related bands, explaining the experimentally unobserved large-gap surface state. The results provide insight into the theoretical understanding of the synthesized MnBi2Te4's quality and experimentally measured topological properties.
Article
Multidisciplinary Sciences
Qian Lv, Junyang Tan, Zhijie Wang, Peng Gu, Haiyun Liu, Lingxiao Yu, Yinping Wei, Lin Gan, Bilu Liu, Jia Li, Feiyu Kang, Hui-Ming Cheng, Qihua Xiong, Ruitao Lv
Summary: A facile synthesis method for mixed-dimensional heterostructures via oxygen plasma treatments of 2D materials was reported. 1D/2D WO3-x/WSe2 heterostructures exhibited high molecular sensitivity with low detection limit and high enhancement factor. The ultrasensitive performance was attributed to efficient charge transfer induced by the unique structures of 1D WO3-x nanowires and effective interlayer coupling of the heterostructures, as observed by ultrafast transient spectroscopy. This work provides insights on the role of ultrafast charge transfer mechanisms in plasmon-free SERS-based molecular sensing and presents an alternative strategy for the synthesis of 1D nanostructures from 2D materials.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Bo Han, Lixiang Zhong, Cailing Chen, Jie Ding, Carmen Lee, Jiawei Liu, Mengxin Chen, Shuen Tso, Yue Hu, Chade Lv, Yu Han, Bin Liu, Qingyu Yan
Summary: Main group element-based materials, specifically aluminum-based defective metal-organic frameworks (MOFs), show promising capabilities as electrocatalysts for sustainable ammonia production via electrochemical nitrogen reduction reaction (N2RR) under ambient conditions. Defective aluminum sites in the aluminum-fumarate (Al-Fum) MOF play a crucial role in promoting N2RR activity. The defective Al-Fum exhibits stable and efficient electrochemical N2RR, with a high production rate of 53.9 μg(NH3) h(-1)mg(cat)(-1) and a Faradaic efficiency of 73.8% under ambient conditions.
Article
Chemistry, Physical
Zhiyuan Zhang, Yuting Luo, Kun Wang, Qiangmin Yu, Xin Kang, Yingqi Liu, Ke Xie, Zhengxing Lv, Zhibo Liu, Fengning Yang, Heming Liu, Ke Liu, Jiong Li, Guangmin Zhou, Wencai Ren, Hui-Ming Cheng, Jia Li, Shuo Zhang, Bilu Liu
Summary: Rational design of pre-catalysts is crucial for efficient catalysis, especially during surface reconstruction. This study presents a surface engineering strategy to form highly active surfaces on Ni-based catalysts (NiMo) under oxygen evolution reaction (OER) conditions. In situ X-ray absorption spectroscopy and theoretical calculations demonstrate that the Fe-O-5 species anchored on Ni oxyhydroxide are easily oxidized under OER conditions, enhancing the reducibility of Ni active sites. This catalyst shows a remarkable increase in intrinsic activity and a decrease in full cell voltage compared to the NiMo and IrO2 catalysts.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Xi Wu, Fawei Zheng, Feiyu Kang, Jia Li
Summary: By using density functional theory calculations, we have identified the stable intercalated structure and the evolution of band structures in the intercalation process of Li into bilayer graphene. Our work shows that the Dirac cone of bilayer graphene can be modulated by using the generalized N/ N/ Kekule order, which opens a gap or splits the electron and hole pocket, contributed by the Kekule-O and Kekule-Y distortion respectively. This study provides valuable insights for the investigation of Li-intercalated bilayer graphene in experiments.
Article
Chemistry, Analytical
An Li, Xinyu Zhang, Yunsong Yin, Xianshuang Wang, Yage He, Yuheng Shan, Ying Zhang, Xiaodong Liu, Lixiang Zhong, Ruibin Liu
Summary: A new method based on laser-induced breakdown spectroscopy and small-sample machine learning is proposed to accurately determine the heat of detonation of explosives. Through statistical correction and spectral feature extraction, a high-accuracy quantitative model is developed based on plasma spectra. The model shows strong predictive power through independent tests, making it a valuable tool for the safe and fast determination of explosive heat of detonation in small samples.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Chemistry, Multidisciplinary
Wei Wu, Chunyuan Feng, Mantao Chen, Qin Tan, Yue Deng, Chao Zeng, Lixiang Zhong, Chunhui Dai
Summary: In this study, two new benzimidazole-linked conjugated microporous polymers were synthesized and one of them showed excellent selectivity and high productivity in the photocatalytic reduction of low-content CO2.