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学者姓名：刘丹敏
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Abstract ：
Methylammonium lead iodide (MAPbI(3)) perovskitematerialshave attracted widespread attention owing to their charming performance.However, the lack of in-depth exploration of the temporal resolutionof the phase transition process has affected their further application.Here, we explored transient optical properties in tetragonal-orthorhombicphase transition behavior at the ultrafast time scale based on ourdelicately grown MAPbI(3) high-quality bulk single crystal.The distinct relaxation characteristics in the structural phase transitionwere found through the pump laser energy-dependent transient reflectionmeasurements while keeping the lattice temperature constant, suggestingthat the relaxation process dominated by electron-phonon interactionis related to the electronic structure of the crystal phase. The transientmeasurement of the lattice temperature slowly changing reveals thedynamic evolution of the whole phase transition process and also stronglyconfirms that the phase transition temperature range is only 1 K.Such an ultrafast dynamics study of crystals at the process of constantand variable temperatures provides a unique insight into the photophysicalprocess of perovskites and opens a new door for studying the ultrafastphase transition of crystals.
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| GB/T 7714 | Li, Yachao , Song, Haiying , Ma, Xiaoran et al. Observation of Tetragonal-to-Orthorhombic Phase Transition in Perovskite MAPbI(3) Single Crystal via Ultrafast Photoexcitation [J]. | JOURNAL OF PHYSICAL CHEMISTRY C , 2023 , 127 (26) : 12613-12620 . |
| MLA | Li, Yachao et al. "Observation of Tetragonal-to-Orthorhombic Phase Transition in Perovskite MAPbI(3) Single Crystal via Ultrafast Photoexcitation" . | JOURNAL OF PHYSICAL CHEMISTRY C 127 . 26 (2023) : 12613-12620 . |
| APA | Li, Yachao , Song, Haiying , Ma, Xiaoran , Liu, Junfeng , Ge, Chao , Liu, Danmin et al. Observation of Tetragonal-to-Orthorhombic Phase Transition in Perovskite MAPbI(3) Single Crystal via Ultrafast Photoexcitation . | JOURNAL OF PHYSICAL CHEMISTRY C , 2023 , 127 (26) , 12613-12620 . |
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Abstract ：
Hydrogen production from electrolytic water is an important sustainable technology to realize renewable energy conversion and carbon neutrality. However, it is limited by the high overpotential of oxygen evolution reaction (OER) at the anode. To reduce the operating voltage of electrolyzer, herein thermodynamically favorable glycerol oxidation reaction (GOR) is proposed to replace the OER. Moreover, vertical NiO flakes and NiMoNH nanopillars are developed to boost the reaction kinetics of anodic GOR and cathodic hydrogen evolution, respectively. Meanwhile, excluding the explosion risk of mixed H-2/O-2, a cheap organic membrane is used to replace the expensive anion exchange membrane in the electrolyzer. Impressively, the electrolyzer delivers a remarkable reduction of operation voltage by 280 mV, and exhibits good long-term stability. This work provides a new paradigm of hydrogen production with low cost and good feasibility.
Keyword ：
Nanostructure Nanostructure Flow cell Flow cell Hydrogen evolution reaction Hydrogen evolution reaction Oxygen evolution reaction Oxygen evolution reaction Glycerol oxidation reaction Glycerol oxidation reaction
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| GB/T 7714 | Li, Shanlin , Liu, Danmin , Wang, Guowei et al. Vertical 3D Nanostructures Boost Efficient Hydrogen Production Coupled with Glycerol Oxidation Under Alkaline Conditions [J]. | NANO-MICRO LETTERS , 2023 , 15 (1) . |
| MLA | Li, Shanlin et al. "Vertical 3D Nanostructures Boost Efficient Hydrogen Production Coupled with Glycerol Oxidation Under Alkaline Conditions" . | NANO-MICRO LETTERS 15 . 1 (2023) . |
| APA | Li, Shanlin , Liu, Danmin , Wang, Guowei , Ma, Peijie , Wang, Xunlu , Wang, Jiacheng et al. Vertical 3D Nanostructures Boost Efficient Hydrogen Production Coupled with Glycerol Oxidation Under Alkaline Conditions . | NANO-MICRO LETTERS , 2023 , 15 (1) . |
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Abstract ：
Studying ultrafast dynamics provides us with a way to modify materials from the timescale of particle interaction, and the related research on antiferromagnetic semiconductors is still inadequate. Based on the electron density reconstruction, we achieve the visualization of magnetic interactions of bulk antiferromagnetic MnPS3 in the ground state, reveal the role of two atomic site occupations of S atoms in different magnetic phase transitions, and provide the theoretical and experimental support for modifying magnetic properties by selectively replacing the S atom. The ultrafast carrier dynamics can provide information from the excited state to the ground state. Based on time-resolved transmittance measurements, ultrafast carrier dynamics of MnPS3 are reported. The phonon-assisted gap transition driven by the electronic structure is characterized. The coupling relationship among electrons, spin, and phonons is established. Furthermore, the spin orientations within different phases are confirmed.
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| GB/T 7714 | Liu, Junfeng , Liu, Danmin , Li, Yachao et al. Electron Density Changes and Ultrafast Carrier Dynamics of the Antiferromagnetic Semiconductor MnPS3 through Magnetic Phase Transition [J]. | INORGANIC CHEMISTRY , 2022 , 61 (46) : 18380-18389 . |
| MLA | Liu, Junfeng et al. "Electron Density Changes and Ultrafast Carrier Dynamics of the Antiferromagnetic Semiconductor MnPS3 through Magnetic Phase Transition" . | INORGANIC CHEMISTRY 61 . 46 (2022) : 18380-18389 . |
| APA | Liu, Junfeng , Liu, Danmin , Li, Yachao , Song, Haiying , Zheng, Xinqi , Fan, Changzeng et al. Electron Density Changes and Ultrafast Carrier Dynamics of the Antiferromagnetic Semiconductor MnPS3 through Magnetic Phase Transition . | INORGANIC CHEMISTRY , 2022 , 61 (46) , 18380-18389 . |
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Abstract ：
The transport properties of ferromagnetic compound CeMn2Ge2 have been systematically studied by magnetic resistivity measurements. Strikingly, it has been found that CeMn2Ge2 compound displays a giant topological Hall effect (THE) about 0.8 mu Omega.cm with 0.45 T magnetic field under 220 k. THE appears in a wide temperature range between 70 and 310 K in a magnetic field region, and could even appear in a zero magnetic field at room temperature. The magnetoresistance curves present gradual change with kinks which have relation to magnetic transitions. Moreover, these results show that topologically protected spin texture may exist in CeMn2Ge2 ferromagnetic compound.
Keyword ：
Non-collinear materials Non-collinear materials CeMn2Ge2 CeMn2Ge2 Sintering Sintering Topological Hall effect Topological Hall effect Magnetic materials Magnetic materials
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| GB/T 7714 | Xu, Guoliang , Liu, Danmin , He, Lidong et al. A giant topological Hall effect in ferromagnetic compound CeMn2Ge2 with wide temperature range from 70 to 310 k [J]. | MATERIALS LETTERS , 2022 , 315 . |
| MLA | Xu, Guoliang et al. "A giant topological Hall effect in ferromagnetic compound CeMn2Ge2 with wide temperature range from 70 to 310 k" . | MATERIALS LETTERS 315 (2022) . |
| APA | Xu, Guoliang , Liu, Danmin , He, Lidong , Wang, Shaobo , Ma, Lin . A giant topological Hall effect in ferromagnetic compound CeMn2Ge2 with wide temperature range from 70 to 310 k . | MATERIALS LETTERS , 2022 , 315 . |
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Abstract ：
二维半导体材料如石墨烯、黑磷、过渡族金属硫化物，因其尺寸小、易集成、光电性能优良等优点，是现阶段微型化光电器件的良好沟道材料.但材料存在不利于实际应用的一些缺点，如石墨烯的“零带隙”、黑磷的易降解、过渡族金属硫化物本征迁移率低.加之在器件制作过程中需要调节势垒高度，因此通过掺杂来对二维半导体材料进行调节极为必要.掺杂是通过引入杂质原子，达到调节半导体材料的载流子类型和浓度、带隙、稳定性等目的.对二维光电器件材料的主要掺杂方法、掺杂对材料微观结构和性能产生的影响进行了综述，根据掺杂原子的占位情况分为位于原材料晶格中和表面两大类进行讨论.在两大类中，介绍了多种掺杂方法，包括气相输运法、离子注入法、...
Keyword ：
二维材料 二维材料 光电性能 光电性能 纳米材料 纳米材料 光电器件 光电器件 掺杂 掺杂 半导体材料 半导体材料
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| GB/T 7714 | 刘丹敏 , 施展 , 张国庆 et al. 二维光电器件材料掺杂方法及影响 [J]. | 北京工业大学学报 , 2022 , 48 (04) : 430-442 . |
| MLA | 刘丹敏 et al. "二维光电器件材料掺杂方法及影响" . | 北京工业大学学报 48 . 04 (2022) : 430-442 . |
| APA | 刘丹敏 , 施展 , 张国庆 , 张永哲 . 二维光电器件材料掺杂方法及影响 . | 北京工业大学学报 , 2022 , 48 (04) , 430-442 . |
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稀土六硼化物(rare earth hexaboride, REB_6)作为热电子发射阴极材料已经应用于各种电子发射器件中，技术的发展对REB_6单晶阴极材料的电子发射和力学性能提出了更高的要求.掺杂稀土元素能改善发射性能，加入过渡族金属二硼化物(transition metal boride, TMB_2)形成共晶复合材料可以提高力学性能.采用区域熔炼法制备的掺杂REB_6单晶和REB_6与TMB_2定向凝固共晶复合材料都是极具应用前景的大尺寸阴极材料.首先，总结了二元REB_6的晶体结构和热发射性能，包括晶体取向和稀土元素对REB_6单晶热发射性能的影响.然后，综述了掺杂和复合REB_6的...
Keyword ：
共晶复合材料 共晶复合材料 阴极材料 阴极材料 热电子发射性能 热电子发射性能 稀土元素掺杂 稀土元素掺杂 定向凝固 定向凝固 稀土六硼化物 稀土六硼化物
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| GB/T 7714 | 刘丹敏 , 石峰 . 掺杂和复合稀土六硼化物的研究进展 [J]. | 北京工业大学学报 , 2022 , 48 (08) : 869-877 . |
| MLA | 刘丹敏 et al. "掺杂和复合稀土六硼化物的研究进展" . | 北京工业大学学报 48 . 08 (2022) : 869-877 . |
| APA | 刘丹敏 , 石峰 . 掺杂和复合稀土六硼化物的研究进展 . | 北京工业大学学报 , 2022 , 48 (08) , 869-877 . |
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Abstract ：
A paired electrochemical refinery toward the cathodic nitrate reduction reaction (NO3RR) and anodic glycerol oxidation reaction (GOR) driven by renewable electricity could generate high value-added ammonia and formic acid simultaneously. However, both cathode and anode electrocatalysts often suffer from low efficiency and unclear reconstruction. Herein, we prepare a non-noble NiCu-OH nanocomposite precatalyst composed of crystalline Cu-2(OH)(3)(NO3) and amorphous Ni(OH)(2), which can be reconstructed into high-activity and stable cathodic NO3RR and anodic GOR electrocatalysts under operating conditions. Various in situ and ex situ experiments demonstrate that NiCu-OH could convert into active Cu nanoparticles coupled with amorphous Ni(OH)(2) under cathodic NO3RR conditions. Meanwhile, under anodic GOR conditions, NiCu-OH-derived bimetal oxide (NiCuO) changes into active NiOOH species composited with Cu vacancy-rich CuO. Furthermore, an actual paired electrochemical refinery with the reconstructed NiCu-based catalysts toward the NO3RR and GOR shows a low potential of 1.37 V at a current density of 100 mA cm(-2) to continuously produce ammonium and formate. This study provides a new paradigm for the design of an electrochemical refinery with reconstructed non-noble electrocatalysts toward chemical upgradation.
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| GB/T 7714 | Li, Shanlin , Ma, Peijie , Gao, Chunlang et al. Reconstruction-induced NiCu-based catalysts towards paired electrochemical refining [J]. | ENERGY & ENVIRONMENTAL SCIENCE , 2022 , 15 (7) : 3004-3014 . |
| MLA | Li, Shanlin et al. "Reconstruction-induced NiCu-based catalysts towards paired electrochemical refining" . | ENERGY & ENVIRONMENTAL SCIENCE 15 . 7 (2022) : 3004-3014 . |
| APA | Li, Shanlin , Ma, Peijie , Gao, Chunlang , Liu, Lijia , Wang, Xunlu , Shakouri, Mohsen et al. Reconstruction-induced NiCu-based catalysts towards paired electrochemical refining . | ENERGY & ENVIRONMENTAL SCIENCE , 2022 , 15 (7) , 3004-3014 . |
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Abstract ：
One-dimensional materials have been intensively studied because of their diverse properties, which are revealed when exfoliated from their bulk precursor. Liquid exfoliation is not only possibly the most suitable method for large-scale applications but also affords an opportunity to develop new deposition techniques. Fibrous phosphorus is a relatively new, one-dimensional material with high carrier mobility and a fast response velocity for future application in nanodevices. Because controllable liquid exfoliation processing of fibrous phosphorus (FP) remains challenging, we considered two factors: the exfoliated result and the removable solvents. We proposed a method for determining suitable solvents for efficient exfoliation and controllable size of fibrous phosphorus using Hansen solubility parameters. By controlling the water/acetone mixture ratios, the exfoliation effect could be controlled. Our work showed that 40% of the FP nanofibers were less than 10 nm in thickness and 70% of them were less than 20 nm. Furthermore, fibrous phosphorus produced a red fluorescence in bioimaging.
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| GB/T 7714 | Zhang Guoqing , Liu Danmin , Tian Nan et al. Controllable Liquid Exfoliation of Fibrous Phosphorus and Its Live-Cell Imaging. [J]. | Inorganic chemistry , 2021 , 60 (7) : 4883-4890 . |
| MLA | Zhang Guoqing et al. "Controllable Liquid Exfoliation of Fibrous Phosphorus and Its Live-Cell Imaging." . | Inorganic chemistry 60 . 7 (2021) : 4883-4890 . |
| APA | Zhang Guoqing , Liu Danmin , Tian Nan , Wang Xiuhong , Yan Wujuan , Huang Zikun et al. Controllable Liquid Exfoliation of Fibrous Phosphorus and Its Live-Cell Imaging. . | Inorganic chemistry , 2021 , 60 (7) , 4883-4890 . |
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Abstract ：
透射电镜作为当代最常用的材料表征手段之一,有着高的分辨率,可以较清晰地在原子尺度表征材料的微观结构与化学成分,在许多学科中发挥着关键作用.新型电池作为高效、清洁的储存装置,给现代生活带来了许多便利,拥有极大的科研与商用价值.而作为电池重要部件的正极材料,是否能高效、安全地工作,时刻影响着新型电池的商业化前景.本文综述了透射电子显微学在新型电池正极材料失效机制研究中的贡献,总结了正极材料失效的普遍原因.利用透射电子显微学表征电池正极,有助于优化传统正极材料,对设计更加先进、稳定的新型正极材料提供理论依据.
Keyword ：
失效机制 失效机制 透射电镜 透射电镜 正极材料 正极材料
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| GB/T 7714 | 付军洁 , 刘丹敏 . 新型电池正极材料失效机制的透射电子显微学研究 [J]. | 电子显微学报 , 2021 , 40 (2) : 188-196 . |
| MLA | 付军洁 et al. "新型电池正极材料失效机制的透射电子显微学研究" . | 电子显微学报 40 . 2 (2021) : 188-196 . |
| APA | 付军洁 , 刘丹敏 . 新型电池正极材料失效机制的透射电子显微学研究 . | 电子显微学报 , 2021 , 40 (2) , 188-196 . |
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Abstract ：
新型电池正极材料失效机制的透射电子显微学研究
Keyword ：
透射电镜 透射电镜 失效机制 失效机制 正极材料 正极材料
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| GB/T 7714 | 付军洁 , 刘丹敏 , 电子显微学报 . 新型电池正极材料失效机制的透射电子显微学研究 [J]. | 付军洁 , 2021 , 40 (2) : 188-196 . |
| MLA | 付军洁 et al. "新型电池正极材料失效机制的透射电子显微学研究" . | 付军洁 40 . 2 (2021) : 188-196 . |
| APA | 付军洁 , 刘丹敏 , 电子显微学报 . 新型电池正极材料失效机制的透射电子显微学研究 . | 付军洁 , 2021 , 40 (2) , 188-196 . |
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