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| 1 | One-Step High-Temperature-Synthesized Single-Atom Platinum Catalyst for Efficient Selective Hydrogenation显示文摘Although single-atom catalysts significantly improve the atom utilization efficiency,the multistep preparation procedures are complicated and difficult to control.Herein,we demonstrate that one-step in situ synthesis of the single-atom Pt anchored in single-crystal MoC(Pt_(1)/MoC)by using facile and controllable arc-discharge strategy under extreme conditions.The high temperature(up to 4000℃)provides the sufficient energy for atom dispersion and overall stability by forming thermodynamically favourable metal-support interactions.The high-temperature-stabilized Pt1/MoC exhibits outstanding performance and excellent thermal stability as durable catalyst for selective quinoline hydrogenation.The initial turnover frequency of 3710 h^(-1)is greater than those of previously reported samples by an order of magnitude under 2 MPa H_(2)at 100℃.The catalyst also shows broad scope activity toward hydrogenation containing unsaturated groups of C=C,C=N,and C=O.The facile,one-step,and fast arc-discharge method provides an effective avenue for single-atom catalyst fabrication that is conventionally challenging. | Qingyuan Bi Xiaotao Yuan Yue Lu Dong Wang Jian Huang Rui Si Manling Sui Fuqiang Huang | 2020 | Research2020，，1： | 5 |
| 2 | Precipitate-stabilized surface enabling high-performance Na_(0.67)Ni_(0.33-x)Mn_(0.67)Zn_(x)O_(2) for sodium-ion battery显示文摘Electrode interfacial degradations are the key challenges for high-performance rechargeable batteries,usually mitigated through surface modification/coating strategies.Herein,we report a novel mechanism to enhance the surface stability of P2 layered cathodes by introducing a high density of dopant-enriched precipitates.Based on microscopic analysis,we show that forming a high density of precipitates at the grain surface can effectively suppress surface cracking and corrosion,which not only improves the surface/interface stability but also effectively suppresses the intergranular cracking issue.Increasing the doping level can lead to a greater density of precipitates at the surface region,which results in higher surface stability and increased cycling stability of the P2 layered cathode for a sodium-ion battery.We further reveal that prolonged cycling can induce the formation of a precipitate-free surface region due to the loss of Zn dopant and Na.Our in-depth microanalysis reveals cycling-induced dynamic structural evolution of the P2 layered cathodes,highlighting that dopant segregation-induced precipitation is a new approach to achieving high interfacial stability. | Kuan Wang Zhengfeng Zhang Sulan Cheng Xiao Han Junjie Fu Manling Sui Pengfei Yan | 2022 | eScience2022，2，5： | 2 |
| 3 | Nucleation and growth characteristics of amorphous Fe-Si-B-(Cu)-(Nb) alloys during isothermal crystallization process 显示文摘 | Zhou Fei He Kaiyuan Sui Manling | 1994 | Materials Science and Engineering1994，，： | 1 |
| 4 | Superplastic extensibility of nanocrystalline copper at room temperature显示文摘 | Lu Lei Sui Manling Lu Ke | 2000 | Science2000，287，： | 1 |
| 5 | Superplastic extensibility of nanocrystalline copper at room temperature显示文摘 | Lu Lei Sui Manling Lu Ke | | Sei- 9ncm 97 1A_IA0，9971，： | 1 |
| 6 | Recent progress on advanced transmission electron microscopy characterization for halide perovskite semiconductors显示文摘Halide perovskites are strategically important in the field of energy materials. Along with the rapid development of the materials and related devices, there is an urgent need to understand the structure–property relationship from nanoscale to atomic scale. Much effort has been made in the past few years to overcome the difficulty of imaging limited by electron dose,and to further extend the investigation towards operando conditions. This review is dedicated to recent studies of advanced transmission electron microscopy(TEM) characterizations for halide perovskites. The irradiation damage caused by the interaction of electron beams and perovskites under conventional imaging conditions are first summarized and discussed. Low-dose TEM is then discussed, including electron diffraction and emerging techniques for high-resolution TEM(HRTEM) imaging. Atomic-resolution imaging, defects identification and chemical mapping on halide perovskites are reviewed. Cryo-TEM for halide perovskites is discussed, since it can readily suppress irradiation damage and has been rapidly developed in the past few years. Finally, the applications of in-situ TEM in the degradation study of perovskites under environmental conditions such as heating,biasing, light illumination and humidity are reviewed. More applications of emerging TEM characterizations are foreseen in the coming future, unveiling the structural origin of halide perovskite’s unique properties and degradation mechanism under operando conditions, so to assist the design of a more efficient and robust energy material. | Xiaomei Wu Xiaoxing Ke Manling Sui | 2022 | Journal of Semiconductors2022，43，4： | 1 |
| 7 | Interaction of {11■2} twin variants in hexagonal close-packed titanium显示文摘As multiple{11■2}twin variants are often formed during deformation in hexagonal close-packed (hcp)titanium, the twin-twin interaction structure has a profound influence on mechanical properties. In this paper, the twin-twin interaction structures of the{11■2}contraction twin in cold-rolled commercial purity titanium were studied by using electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). Formation of the{11■2}twin variants was found to deviate the rank of Schmid factor,and the non-Schmid behavior was explained by the high-angle grain boundary nucleation mechanism.All the observed twin-twin pairs manifested a quilted-looking structure, which consists of the incoming twins being arrested by the obstacle twins. Furthermore, the quilted-looking{11■2}twin-twin boundary was revealed by TEM and high resolution TEM observations. De-twinning, lattice rotation and curved twin boundary were observed in the obstacle twin due to the twin-twin reaction with the impinging twin. A twin-twin interaction mechanism for the{11■2}twin variants was proposed in terms of the dislocation dissociation, which will enrich the understanding for the propagation of twins and twinning-induced hardening in hcp metals and alloys. | Xiaocui Li Jingwei Li Bo Zhou Mingchao Yu Manling Sui | 2019 | Journal of Materials Science & Technology2019，35，4： | 1 |
| 8 | Investigation of the microcrack evolution in a Ti-based bulk metallic glass matrix composite显示文摘The initiation and evolution behavior of the shear-bands and microcracks in a Ti-based metallic-glass–matrix composite(MGMC) were investigated by using an in-situ tensile test under transmission electron microscopy(TEM). It was found that the plastic deformation of the Ti-based MGMC related with the generation of the plastic deformation zone in crystalline and shear deformation zone in glass phase near the crack tip. The dendrites can suppress the propagation of the shear band effectively. Before the rapid propagation of cracks, the extending of plastic deformation zone and shear deformation zone ahead of crack tip is the main pattern in the composite. | Yongsheng Wang Zhenxi Guo Rui Ma Guojian Hao Yong Zhang Junpin Lin Manling Sui | 2014 | Progress in Natural Science:Materials International2014，24，2： | 1 |
| 9 | Advanced TEM Characterization for Single-atom Catalysts:from Ex-situ Towards In-situ显示文摘Clean energy innovation has triggered the development of single-atom catalysts(SACs)due to their excellent catalytic activity,high tunability and low cost.The success of SACs for many catalytic reactions has opened a new field,where the fundamentals of catalytic property-structure relationship at atomic level await exploration,and thus raises challenges for structural characterization.Among the characterization techniques for SACs,aberration-corrected transmission electron microscopy(TEM)has become an essential tool for direct visualization of single atoms.In this review,we briefly summarize recent studies on SACs using advanced TEM.We first introduce TEM methods,which are particularly important for SACs characterization,and then discuss the applications of advanced TEM for SAC characterization,where not only atomic dispersion of single atoms can be studied,but also the distribution of elements and the valence state with local coordination can be resolved.We further extend our review towards in-situ TEM,which has increasing importance for the fundamental understanding of catalytic mechanism.Perspectives of TEM for SACs are finally discussed. | WANG Guowei KE Xiaoxing SUI Manling | 2022 | Chemical Research in Chinese Universities2022，38，5： | 0 |
| 10 | Intrinsic Strengthening of Coherent Twin Boundaries in Copper显示文摘Molecular dynamics (MD) simulations were applied to simulate the deformation process of copper with different density of parallel coherent twin boundaries (TBs). It is shown that the strength of perfect copper crystal enhances with increasing coherent TB density. Based on the local hydrostatic pressure analysis, we found that stress concentrations are more likely to form in the interior of the crystal rather than around the TBs. Since the dislocation nucleation is suppressed in the vicinity of the coherent TBs and each TB plane hinders dislocations from propagating, the coherent TBs can be regarded as an intrinsic strengthening phase relative to perfect crystal. | Yanfen Luo Yuchen Wang Yanbo Wang Yuanming Wang Manling Sui | 2009 | Journal of Materials Science & Technology2009，25，2： | 0 |
| 11 | Deciphering the critical effect of cathode-electrolyte interphase by revealing its dynamic evolution显示文摘Cathode electrolyte interphase(CEI)layer plays a crucial role in determining the electrochemical performance of lithium-ion batteries.Limited by the sensitive nature of CEI and the lack of characterization techniques,its dynamic evolution during cycling,its formation mechanism,and its specific impact on battery performance are not yet fully understood.Herein,we systematically investigate the dynamic evolution of CEI layer and its critical effect on the cycling performance of LiCoO_(2)cathode by diverse characterization techniques.We find that cycling voltage plays a key role in affecting CEI formation and evolution,and a critical potential(4.05 V vs.Li)is identified,which acts as the switching potential between CEI deposition and decomposition.We show that CEI starts deposition in the discharge process when the potential is below 4.05 V,and CEI decomposition occurs when the potential is higher than 4.05 V.When the battery is cycled below such a critical potential,a stable CEI layer is developed,which leads to superior cycling stability.When the battery is cycled above such a critical potential,a CEI-free cathode interface is observed,which also demonstrates good cycle stability.However,when the critical potential falls in the cycling voltage range,CEI deposition and decomposition are repeatedly switched on during cycling,leading to the dynamically unstable CEI layer.The unstable CEI layer causes continuous interfacial reaction and degradation,resulting in battery performance decay.Our work deepens the understanding of the CEI formation and evolution mechanisms,and clarifies the critical effect of CEI layer on cycling performance,which provides new insights into stabilizing the electrode-electrolyte interface for high-performance rechargeable batteries. | Zhengfeng Zhang Changdong Qin Kuan Wang Xiao Han Jinhui Li Manling Sui Pengfei Yan | 2023 | Journal of Energy Chemistry2023，，6： | 0 |
| 12 | Formation mechanism of hydride precipitation in commercially pure titanium显示文摘Since titanium has high affinity for hydrogen and reacts reversibly with hydrogen,the precipitation of titanium hydrides in titanium and its alloys cannot be ignored.Two most common hydride precipitates in α-Ti matrix areγ-hydride and δ-hydride,however their mechanisms for precipitation are still unclear.In the present study,we find that both γ-hydride and δ-hydride phases with different specific orientations were randomly precipitated in the as-received hot forged commercially pure Ti.In addition,a large amount of the titanium hydrides can be introduced into Ti matrix with selective precipitation by using electrochemical treatment.Cs-corrected scanning transmission electron microscopy is used to study the precipitation mechanisms of the two hydrides.It is revealed that the γ-hydride and δ-hydride precipitations are both formed through slip+shuffle mechanisms involving a unit of two layers of titanium atoms,but the difference is that the γ-hydride is formed by prismatic slip corresponding to hydrogen occupying the octahedral sites of α-Ti,while the δ-hydride is formed by basal slip corresponding to hydrogen occupying the tetrahedral sites ofα-Ti. | Jingwei Li Xiaocui Li Manling Sui | 2021 | Journal of Materials Science & Technology2021，，22： | 0 |
| 13 | High density stacking faults of ■ compression twin in magnesium alloys显示文摘{1011} compression twins with high density stacking faults were studied at atomic scale using Cscorrection transmission electron microscopy. On one side of the {1011} twin boundary, there were many steps arranged alternately with the coherent twin boundaries. Most of the steps were linked with stacking faults inside twins. Burgers vector of twinning dislocations and the mismatch strain at steps were characterized. Due to the compressive mismatch strain at steps, the high density stacking faults inside twins were formed at twin tips during twinning process. The localized strain at the steps would be related to the crack nucleation in magnesium alloys. | Bo Zhou Manling Sui | 2019 | Journal of Materials Science & Technology2019，35，10： | 0 |
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