Article
Chemistry, Multidisciplinary
Antonija Grubisic-Cabo, Matteo Michiardi, Charlotte E. Sanders, Marco Bianchi, Davide Curcio, Dibya Phuyal, Magnus H. Berntsen, Qinda Guo, Maciej Dendzik
Summary: 2D materials provide a platform to study novel physical phenomena arising from quantum confinement. This article reports a simple method for in situ exfoliation in ultra-high vacuum, which yields large-area, single-layered films of high quality. This approach enables the study of air-sensitive 2D materials and the control of substrate-2D material twist angle.
Article
Physics, Applied
Xuechao Feng, Jie Wu
Summary: We have studied the magnetic properties of transition metal intercalated niobium dichalcogenides CoNb3S6, NiNb3S6 and CuNb3S6. CoNb3S6 and NiNb3S6 exhibit antiferromagnetic ordering at low temperatures, while CuNb3S6 shows no magnetic phase transition throughout the temperature range.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2022)
Article
Chemistry, Multidisciplinary
Lixuan Xu, Yiwei Li, Yuqiang Fang, Huijun Zheng, Wujun Shi, Cheng Chen, Ding Pei, Donghui Lu, Makoto Hashimoto, Meixiao Wang, Lexian Yang, Xiao Feng, Haijun Zhang, Fuqiang Huang, Qikun Xue, Ke He, Zhongkai Liu, Yulin Chen
Summary: The evolution of physical properties in 2D materials from monolayer to bulk introduces unique effects due to dimension confinement and provides a tuning knob for applications. The novel 2M-TMDs, consisting of translationally stacked 1T'-monolayers, exhibit tunable inverted bandgaps and interlayer coupling, making them promising as building blocks for various topological phases. By using advanced spectroscopy and calculations, a topology hierarchy is revealed, showing different topological insulator states in 2M-WSe2, MoS2, MoSe2, and 2M-WS2 due to band inversion amplitude and interlayer coupling. These 2M-TMDs are proposed as parent compounds for exotic phases and have great potential in quantum electronics due to their flexibility in patterning with 2D materials.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Yiwei Li, Qiang Wan, Nan Xu
Summary: The past decade has seen significant progress in 2D materials, particularly in the field of artificial moire superlattices. These superlattices exhibit a range of quantum phenomena beyond their constituent materials, thanks to their nontrivial electronic structures. Modern ARPES techniques allow for direct visualization of these electronic structures, providing valuable insights into the fundamental physics of moire superlattice systems and guiding the design of novel devices.
ADVANCED MATERIALS
(2023)
Article
Physics, Multidisciplinary
Zhengguo Wang, Weiliang Yao, Yudi Wang, Ziming Xin, Tingting Han, Lei Chen, Yi Ou, Cong Cai, Yuan Li, Yan Zhang
Summary: In this study, two distinct metal-insulator transitions were discovered in 1T-TaS2 using angle-resolved photoemission spectroscopy and in-situ rubidium deposition. The results successfully differentiate the metallic, band-insulating, and Mott-insulating phases of 1T-TaS2, revealing a delicate balance among electron-itineracy, interlayer-coupling, and Coulomb repulsion.
Article
Physics, Multidisciplinary
Zilu Wang, Haoyu Dong, Weichang Zhou, Zhihai Cheng, Shancai Wang
Summary: We report high-resolution angle-resolved photoemission spectroscopy (ARPES) studies on the electronic structure of Ti-doped 1T-Ti x Ta1-x S2 with different doping levels. A flat band originating from the formation of the star of David super-cell is observed in the x = 5% sample at low temperature. With increasing Ti doping levels, the flat band disappears in the x = 8% sample due to extra hole carriers. The localized flat band and correlation effect in 1T-TMDCs can be tuned by changing the filling factor through doping electron or hole carriers.
Article
Chemistry, Multidisciplinary
Robert Wallauer, Raul Perea-Causin, Lasse Muenster, Sarah Zajusch, Samuel Brem, Jens Guedde, Katsumi Tanimura, Kai-Qiang Lin, Rupert Huber, Ermin Malic, Ulrich Hoefer
Summary: The study successfully resolved the dynamics of dark exciton formation in monolayer WS2 using advanced experimental techniques combined with theoretical research, and observed the details of exciton formation.
Article
Chemistry, Multidisciplinary
Mario Pelaez-Fernandez, Yung-Chang Lin, Kazu Suenaga, Raul Arenal
Summary: Band gap engineering of atomically thin two-dimensional (2D) materials has garnered much interest for their potential applications in nanooptoelectronics and nanophotonics. Low-loss electron energy loss spectroscopy was used to directly measure the band gap in atomically thin Mo(x)W((1-x))S2 nanoflakes, revealing a bowing effect with the alloying degree. The study also analyzed additional properties such as Van Hove singularities in the density of states and high energy excitonic transitions in these materials.
Article
Chemistry, Multidisciplinary
Raphael Salazar, Sara Varotto, Celine Vergnaud, Vincent Garcia, Stephane Fusil, Julien Chaste, Thomas Maroutian, Alain Marty, Frederic Bonell, Debora Pierucci, Abdelkarim Ouerghi, Francois Bertran, Patrick Le Fevre, Matthieu Jamet, Manuel Bibes, Julien Rault
Summary: Multilayers based on quantum materials have the potential to revolutionize microelectronics and optoelectronics. However, heterostructures incorporating quantum materials from different families remain scarce. In this study, we demonstrate the large-scale integration of compounds from two highly multifunctional families, perovskite oxides and transition-metal dichalcogenides, opening up new possibilities for manipulating the properties of transition-metal dichalcogenides through proximity effects.
Article
Chemistry, Physical
Mengyao Li, Premkumar Selvarajan, Shuangyue Wang, Tao Wan, Shibo Xi, Xiaopeng Wang, Junmin Xue, Sathish Clastinrusselraj Indirathankam, Xun Geng, Liang Qiao, Ajayan Vinu, Dewei Chu, Jiabao Yi
Summary: A simple stirring method at room temperature was reported to fabricate Cu single atoms (SAs) layer-intercalated MoS2. An ultra-high concentration of Cu SAs was achieved and the intercalated Cu atoms greatly enhanced the stability of MoS2. The MoS2/Cu-SAs showed remarkable thermostability and outstanding catalytic performance. This strategy can be applied to produce SAs of other metals and other 2D nanosheets as host materials, offering a facile and low-cost approach for SAs catalysts.
Article
Physics, Multidisciplinary
Wei Zhi-Yuan, Hu Yong, Zeng Ling-Yong, Li Ze-Yu, Qiao Zhen-Hua, Luo Hui-Xia, He Jun-Feng
Summary: Transition metal dichalcogenides (TMDs) have attracted a lot of interest in condensed matter physics research due to the existence of multiple novel physical phenomena. In this study, the electronic structure of 1T-NbSeTe is examined, and a van Hove singularity (VHS) is identified. The possible role of the VHS and electron-boson coupling in charge density wave and superconductivity is discussed.
ACTA PHYSICA SINICA
(2022)
Article
Chemistry, Multidisciplinary
Yeojin Ahn, Gyubin Lee, Namgyu Noh, Chulwan Lee, Duc Duy Le, Sunghun Kim, Yeonghoon Lee, Jounghoon Hyun, Chan-young Lim, Jaehun Cha, Mingi Jho, Seonggeon Gim, Jonathan D. Denlinger, Chan-Ho Yang, Jong Min Yuk, Myung Joon Han, Yeongkwan Kim
Summary: We report the synthesis of ethylenediamine-intercalated NbSe2 and Li-ethylenediamine-intercalated MoSe2 single crystals with increased interlayer distances and their electronic structures. The successful intercalation and increase in interlayer distance are confirmed by X-ray diffraction and transmission electron microscopy. The ARPES measurement reveals that intercalated NbSe2 and MoSe2 exhibits the same electronic structures as monolayer materials. This research demonstrates that the properties of monolayer transition metal dichalcogenides can also be achieved in large-scale bulk samples through intercalation.
Article
Materials Science, Multidisciplinary
Conor Jason Price, Steven Paul Hepplestone
Summary: We conducted a first-principles study on the elastic behavior of layered TMDCs and their lithium- or magnesium-intercalated structures. We evaluated the elastic matrices to determine key properties and ductility. The anisotropy of the materials and the effects of different intercalant configurations were also assessed.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Conor Jason Price, Steven Paul Hepplestone
Summary: We present a first-principles study on the elastic behavior of layered TMDCs and their lithium- or magnesium-intercalated structures. The research shows that the addition of intercalants generally increases the bulk, shear, and Young's moduli of the materials. However, TMDCs composed of later Group transition metals break this trend. The study also reveals that the pristine materials are brittle but become more ductile with the introduction of lithium or magnesium. The anisotropy of the materials is high due to their weak interactions across the vdW spacing, but the insertion of ions reduces this anisotropy.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Wei Wen, Xu Duan, Bin Liu, Caiyun Hong, Zhen Song, Bing Lin, Pengxu Ran, Shi Liu, Zhi Ren, Rui-Hua He
Summary: In-situ cesium (Cs) dosing induces an evolution of the surface electronic structure of Sn4Sb3, leading to quantum confinement of electronic states near the surface. With increasing Cs dosage, Cs atoms deposit on the sample surface or intercalate underneath, accompanied by a gradual suppression of surface band splitting. The study also highlights the possibility of an unexpected dimensionality reduction in Sn4Sb3 caused by Cs intercalation at interstitial sites.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Review
Chemistry, Multidisciplinary
Qun He, Sicong Qiao, Yuzhu Zhou, Robert Vajtai, Deping Li, Pulickel M. Ajayan, Lijie Ci, Li Song
Summary: This review summarizes the research progress of carbon nanotubes (CNTs)-based electrocatalysts in various electrochemical reactions and highlights the structure regulation methods. The functions of CNTs-based electrocatalysts in electrochemical reactions and the support effect related to CNTs are discussed.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Chemistry, Physical
Sicong Qiao, Qun He, Pengjun Zhang, Yuzhu Zhou, Shuangming Chen, Li Song, Shiqiang Wei
Summary: Single-atom catalysts (SACs) have drawn significant attention for their ability to achieve maximum atom utilization and provide well-defined active sites in energy conversion reactions. The local structures of active sites in SACs largely determine their catalytic activity and selectivity, with synchrotron-radiation spectroscopic characterization methods playing a key role in identifying these environments. Experimental analyses from various techniques, such as X-ray absorption spectroscopy (XAS) and photoemission spectroscopy (PES), highlight the structure-activity relationships towards identified active sites.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
Wangxin Ge, Yuxin Chen, Yu Fan, Yihua Zhu, Honglai Liu, Li Song, Zhen Liu, Cheng Lian, Hongliang Jiang, Chunzhong Li
Summary: This study investigates the influence of bias potential on the interfacial microenvironment and catalytic selectivity using CO2 and H2O electrochemical co-reduction on commercial electrodes with surfactant additives. The results reveal that the bias potential leads to a transformation of the surfactant structure from random distribution to ordered assembly, which regulates the water environment and promotes CO2 enrichment at the electrified interface. This hydrophobic-aerophilic interface microenvironment reduces the water dissociation activity and increases the selectivity of CO2 electroreduction to CO.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Review
Chemistry, Multidisciplinary
Dengfeng Cao, Wenjie Xu, Shuangming Chen, Chongjing Liu, Beibei Sheng, Pin Song, Oyawale Adetunji Moses, Li Song, Shiqiang Wei
Summary: The importance of catalysts in modern industrial fields cannot be underestimated. Rational design and engineering of targeted catalysts require in-depth understanding of complex catalytic dynamics. Synchrotron radiation (SR) light sources with advanced experimental methods have become a comprehensive characterization platform for studying catalysis under actual working conditions. This article summarizes the recent progress of catalytic dynamics process studied using various SR techniques, and emphasizes the need for a combination of multiple SR techniques to better understand the whole catalysis process. The development of new light sources is expected to enrich the current multiple SR techniques and visualize future catalytic dynamic processes.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xiao-Jing Liu, Yue Yu, Di Liu, Qi-Long Cui, Xiaozhuo Qi, Yang Chen, Guangyuan Qu, Li Song, Guo-Ping Guo, Guang-Can Guo, Xiankai Sun, Xi-Feng Ren
Summary: This work demonstrates experimentally that the photoluminescence from WS2 can be coupled into a BIC waveguide on a LNOI substrate, offering a new perspective for light-matter coupling in monolithic PICs by breaking through the limits of 2D-material integration with conventional photonic architectures.
Article
Multidisciplinary Sciences
Shengmei Chen, Yiran Ying, Longtao Ma, Daming Zhu, Haitao Huang, Li Song, Chunyi Zhi
Summary: The authors address the contradictory demands from zinc metal anode and cathodes in zinc metal batteries by designing an asymmetric electrolyte composed of an inorganic solid-state electrolyte and a hydrogel electrolyte.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Shi Tao, Guikai Zhang, Bin Qian, Jun Yang, Shengqi Chu, Chencheng Sun, Dajun Wu, Wangsheng Chu, Li Song
Summary: Heterostructured compounds with engineered interfaces have been widely studied as efficient electrocatalysts for oxygen evolution reaction (OER). However, the mechanism behind their intrinsic activities remains unclear. In this study, a NiSe2/FeSe2 heterostructure catalyst was fabricated through the selenization of Ni-Fe Prussian-blue analog templates, showing low overpotential (230 mV at 10 mA cm(-2)) and long-term durability. In-situ/operando Raman spectroscopy and synchrotron-based X-ray absorption spectroscopy (XAS) were used to investigate the catalytic process, revealing that the surface reconstruction into Ni-O-Fe configurations and the presence of high-valence NiIII-O-FeIII moieties in Ni-FeOOH are responsible for the high oxygen evolution activity. Density functional theory (DFT) simulations further confirmed that electron transfer driven by strong Ni-Fe synergistic effect in the NiSe2/FeSe2 heterostructure not only enhances the density of Ni/Fe active sites but also modulates their nature. This work provides insights into the intrinsic activities of metal compound heterostructures and the relationship between dynamic surface structural evolution and catalytic activity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Review
Chemistry, Multidisciplinary
Qun He, Beibei Sheng, Kefu Zhu, Yuzhu Zhou, Sicong Qiao, Zhouxin Wang, Li Song
Summary: In recent years, there has been growing interest in the development of two-dimensional nanomaterials for energy applications, due to their unique physicochemical properties. This review focuses on the phase engineering of typical 2D nanomaterials, with a particular emphasis on synchrotron radiation characterizations. The review covers intrinsic defects, atomic doping, intercalation, heterogeneous interfaces, and their applications in energy-related fields. Multiple spectroscopic techniques based on synchrotron radiation are highlighted for revealing the intrinsic phases and structures of these nanomaterials. In situ methods are also discussed for providing insights into the structural evolutions during working conditions or reaction processes. The review concludes with research perspectives on the future development of 2D energy nanomaterials and synchrotron radiation techniques.
Article
Multidisciplinary Sciences
Shichao Xu, Haifeng Wu, Siyuan Liu, Peidong Du, Hui Wang, Haijun Yang, Wenjie Xu, Shuangming Chen, Li Song, Jikun Li, Xinghua Shi, Zhen-Gang Wang
Summary: In this study, a supramolecular mimetic enzyme with catechol oxidase-like copper-cluster active sites was synthesized. This catalyst exhibits catalytic functions similar to those of copper cluster-dependent oxidases, and its performance surpasses previously reported artificial complexes.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Juanjuan Zhao, Hao Tan, Zhenfa Zi, Li Song, Haibo Hu, Haijun Zhang, Mingzai Wu
Summary: By coupling in situ generated CoS nanoparticles with a dual-heteroatom-doped layered carbon framework, a hybrid Co-based catalyst is synthesized, which significantly enhances the energy efficiency of zinc-air batteries.
Article
Chemistry, Inorganic & Nuclear
Ping Wan, Yang Si, Shuang Zhu, Changda Wang, Yuyang Cao, Zhen Yu, Wenjie Wang, Chen Chen, Wangsheng Chu, Li Song
Summary: Ultrasmall nanostructured Co3O4 particles were synthesized using a two-step method and applied in lithium-ion batteries. These particles exhibited a high specific capacity of 1432.7 mA h g(-1) at 0.1 A g(-1) and maintained an outstanding cycle life of about511.2 mA h g(-1) at 10 A g(-1) after 2000 cycles, thanks to their increased specific surface area and improved tolerance for volume expansion. This study presents a new approach to develop advanced electrode materials for long-lasting high-rate lithium-ion batteries.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Sicong Qiao, Hongwei Shou, Wenjie Xu, Yuyang Cao, Yuzhu Zhou, Zhouxin Wang, Xiaojun Wu, Qun He, Li Song
Summary: Alloying can improve catalytic performance by inducing ensemble and ligand effects. This study investigates the structural differences in PdxAuy alloys and demonstrates the impact of these differences on the oxygen reduction reaction activity. The optimized PdxAuy catalyst shows enhanced reaction kinetics and higher mass activity compared to commercial Pt/C.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Chang-Xin Zhao, Jia-Ning Liu, Changda Wang, Juan Wang, Li Song, Bo-Quan Li, Qiang Zhang
Summary: This study reveals the anionic regulation mechanism of sulfide electrocatalysts under working oxygen evolution conditions, leading to the formation of a stable oxysulfide structure as the actual active site for oxygen evolution electrocatalysis. This finding provides a fundamental understanding of surface reconstruction and active sites of sulfide oxygen evolution electrocatalysts and inspires the design of advanced multi-anion compounds for rational electrocatalysis.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Meilin Duan, Canyu Hu, Hao Li, Yihong Chen, Ruitian Chen, Wanbing Gong, Zhou Lu, Ning Zhang, Ran Long, Li Song, Yujie Xiong
Summary: This study reports a direct light-driven alkene production through alcohol dehydration using non-stoichiometric tungsten oxide nanowires with lattice defects as a photocatalyst. The inter- and intraband transitions synergistically contribute to the excellent activity observed. The research provides insights into sustainable alkene production with renewable energy input under mild conditions.
Article
Chemistry, Inorganic & Nuclear
Ping Wan, Shijie Wang, Shuang Zhu, Changda Wang, Zhen Yu, Wenjie Wang, Yang Si, Wangsheng Chu, Li Song
Summary: In this study, a bimetallic sulfide Fe0.4Co0.6S2@NC nanobox was prepared via a simple synthetic route and showed high capacity and excellent cycling stability as an SIB anode material.
DALTON TRANSACTIONS
(2022)