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学者姓名：隋曼龄
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Abstract ：
The development of pure-blue perovskite light-emitting diodes (PeLEDs) faces challenges of spectral stability and low external quantum efficiency (EQE) due to phase separation in mixed halide compositions. Perovskite quantum dots (QDs) with strong confinement effects are promising alternatives to achieve high-quality pure-blue PeLEDs, yet their performance is often hindered by the poor size distribution and high trap density. A strategy combining thermodynamic control with a polishing-driven ligand exchange process to produce high-quality QDs is developed. The strongly-confined pure-blue (approximate to 470 nm) CsPbBr3 QDs exhibit narrow size distribution (12% dispersion) and are achieved in Br-rich ion environment based on growth thermodynamic control. Subsequent polishing-driven ligand exchange process removes imperfect surface sites and replaces initial long-chain organic ligands with short-chain benzene ligands. The resulting QDs exhibit high photoluminescence quantum yield (PLQY) to near-unity. The resulting PeLEDs exhibit a pure-blue electroluminescence (EL) emission at 472 nm with narrow full-width at half-maximum (FWHM) of 25 nm, achieving a maximum EQE of 10.7% and a bright maximum luminance of 7697 cd m(-2). The pure-blue PeLEDs show ultrahigh spectral stability under high voltage, a low roll-off of EQE, and an operational half-lifetime (T-50) of 127 min at an initial luminance of 103 cd m(-2) under continuous operation.
Keyword ：
polishing-driven ligand exchange polishing-driven ligand exchange pure-blue emission pure-blue emission size distribution size distribution perovskite light-emitting diodes perovskite light-emitting diodes perovskite quantum dots perovskite quantum dots
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| GB/T 7714 | Wei, Shibo , Hu, Jingcong , Bi, Chenghao et al. Strongly-Confined CsPbBr3 Perovskite Quantum Dots with Ultralow Trap Density and Narrow Size Distribution for Efficient Pure-Blue Light-Emitting Diodes [J]. | SMALL , 2024 , 20 (36) . |
| MLA | Wei, Shibo et al. "Strongly-Confined CsPbBr3 Perovskite Quantum Dots with Ultralow Trap Density and Narrow Size Distribution for Efficient Pure-Blue Light-Emitting Diodes" . | SMALL 20 . 36 (2024) . |
| APA | Wei, Shibo , Hu, Jingcong , Bi, Chenghao , Ren, Ke , Wang, Xingyu , de de Leeuw, Nora H. et al. Strongly-Confined CsPbBr3 Perovskite Quantum Dots with Ultralow Trap Density and Narrow Size Distribution for Efficient Pure-Blue Light-Emitting Diodes . | SMALL , 2024 , 20 (36) . |
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Abstract ：
Cycling-induced cathode interfacial degradations are usually attributed to chemical process, while the physical effect is overlooked to a large extent. Herein, we investigate the failure mechanism of LiCoO2 cathode and reveal that misfit strain plays a dominant role in the surface layer exfoliation process. We illustrate that highly strained LiCoO2 surface can initiate massive surface cracks, leading to the LiCoO2 surface layer broken and exfoliation. Mechanical cracking coupled with chemical etching aggravates the surface layer degradation, leading to a weathering-like degradation on LiCoO2 surface. Our work reveals that interfacial degradation of electrode materials is a complex physicochemical process. [GRAPHICS] .
Keyword ：
electron microscopy electron microscopy misfit strain misfit strain Lithium-ion battery Lithium-ion battery cracking cracking LiCoO2 LiCoO2
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| GB/T 7714 | Jiang, Yuyuan , Lu, Yuyang , Zhang, Zhengfeng et al. Misfit strain-induced mechanical cracking aggravating surface degradation of LiCoO2 [J]. | MATERIALS RESEARCH LETTERS , 2023 , 11 (6) : 471-479 . |
| MLA | Jiang, Yuyuan et al. "Misfit strain-induced mechanical cracking aggravating surface degradation of LiCoO2" . | MATERIALS RESEARCH LETTERS 11 . 6 (2023) : 471-479 . |
| APA | Jiang, Yuyuan , Lu, Yuyang , Zhang, Zhengfeng , Chang, Lige , Li, Jinhui , Han, Xiao et al. Misfit strain-induced mechanical cracking aggravating surface degradation of LiCoO2 . | MATERIALS RESEARCH LETTERS , 2023 , 11 (6) , 471-479 . |
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Abstract ：
The tailoring of active sites is closely related to the substrate. Dual-atom catalysts (DACs) have been achieved on doped carbon, oxides, and 2D materials, but are rarely reported on metals, due to the challenges of sintering and alloying using metal as the host. Herein, an innovative approach to anchor isolated single atoms as dual-atomic-site alloy (DASA) through two-step pyrolysis of porous structure is proposed. Firstly, the role of Zn and Co in generating pores during the pyrolysis of zeolite imidazolate framework (ZIFs) is revealed, and a hierarchical porous structure with self-supported Co particles is achieved by the first-step pyrolysis. Diffusion-controlled reduction of precursors containing target metals is then allowed through hierarchical structures by second-step pyrolysis, so to address the challenge of sintering and alloying at pyrolysis of high temperatures. The approach is demonstrated by synthesizing Ir1Ni1@Co/N-C DASA, with outstanding bifunctional oxygen reduction/evolution reaction (ORR/OER) performance in both acidic and alkaline media, which is rarely reported. The density functional theory (DFT) calculations represent that adsorption-free energies of intermediates OH and O are regulated to nearly 0 eV by Ir1 and Ni1 on Co. This work demonstrates a new path of constructing DASA using the designed porous structure, inspiring catalysts design in a related field. Atomic dispersion of dual-atoms has rarely been reported on metals, due to challenges of sintering and alloying using metal as host. Here, an innovative approach to synthesize DASA through two-step pyrolysis of Co-Zn-ZIF is proposed. Diffusion-controlled reduction of precursors containing target metals is allowed through hierarchical structures so to avoid sintering. The approach is demonstrated on synthesizing Ir1Ni1@Co/N-C DASA, with outstanding bifunction ORR/OER performance in both acidic and alkaline media.image
Keyword ：
in situ TEM in situ TEM zeolite imidazolate framework zeolite imidazolate framework bifunctional eletrocatalysts bifunctional eletrocatalysts Zn-Air batteries Zn-Air batteries dual-atomic-site alloys dual-atomic-site alloys
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| GB/T 7714 | Wang, Guowei , Zhang, Manchen , Zhang, Guikai et al. Novel Approach of Diffusion-Controlled Sequential Reduction to Synthesize Dual-Atomic-Site Alloy for Enhanced Bifunctional Electrocatalysis in Acidic and Alkaline Media [J]. | ADVANCED FUNCTIONAL MATERIALS , 2023 , 34 (6) . |
| MLA | Wang, Guowei et al. "Novel Approach of Diffusion-Controlled Sequential Reduction to Synthesize Dual-Atomic-Site Alloy for Enhanced Bifunctional Electrocatalysis in Acidic and Alkaline Media" . | ADVANCED FUNCTIONAL MATERIALS 34 . 6 (2023) . |
| APA | Wang, Guowei , Zhang, Manchen , Zhang, Guikai , Wang, Zelin , Chen, Xu , Ke, Xiaoxing et al. Novel Approach of Diffusion-Controlled Sequential Reduction to Synthesize Dual-Atomic-Site Alloy for Enhanced Bifunctional Electrocatalysis in Acidic and Alkaline Media . | ADVANCED FUNCTIONAL MATERIALS , 2023 , 34 (6) . |
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Abstract ：
High chemical and mechanical stability of cathode surface are the prerequisites enabling high-performance rechargeable battery. Surface facet is among the surface properties that dictate surface stability and cycling performance, while its underlying mechanism remains elusive. Herein, it is reported that surface stability is closely related to the surface facet for a variety of layered cathodes. The investigation shows that surface structure of P2 layered cathode undergoes sequential transformation upon cycling, which results in severe surface degradation. This study finds that the surface facets perpendicular to the (002) planes experience severe cracking and corrosion, while other surface facets are much more stable. The surface stability difference mainly comes from a geometric effect on strain release, which determines the mechanical stability of surface. Chemically, transition metal condensation forms a passivation layer to effectively prevent the inward propagation of surface degradation. Therefore, the surface facets oblique to the layered-planes are intrinsically more resistant to mechanical cracking and chemical corrosion, which is further verified as a common effect in several O3-type layered cathodes. This work not only deepens the understanding of the mechanism how surface facet affects surface stability, but also validates surface facet regulation can be a promising strategy for optimizing battery materials.
Keyword ：
sodium ion batteries sodium ion batteries layered cathodes layered cathodes surface stability surface stability cracking cracking TEM TEM
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| GB/T 7714 | Wang, Kuan , Zhang, Zhengfeng , Ding, Yang et al. Surface Facet Dependent Cycling Stability of Layered Cathodes [J]. | ADVANCED FUNCTIONAL MATERIALS , 2023 , 33 (37) . |
| MLA | Wang, Kuan et al. "Surface Facet Dependent Cycling Stability of Layered Cathodes" . | ADVANCED FUNCTIONAL MATERIALS 33 . 37 (2023) . |
| APA | Wang, Kuan , Zhang, Zhengfeng , Ding, Yang , Cheng, Sulan , Xiao, Biwei , Sui, Manling et al. Surface Facet Dependent Cycling Stability of Layered Cathodes . | ADVANCED FUNCTIONAL MATERIALS , 2023 , 33 (37) . |
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Abstract ：
电化学及光化学液体环境透射电子显微镜技术由于能够对固-液相界面进行直接实时动态观测,近年来在能源催化机理研究领域的机理研究得到了应用。首先,对液体环境透射电子显微镜中引入电信号和光信号的平台设计方案进行了归纳总结;其次,对这项技术在电催化产氢、二氧化碳还原以及光催化产氢这几类典型的能源催化体系中的应用进行了分类介绍和成果总结;最后,针对这项技术的局限性进行了分析,提出了解决方案并在此基础上对其未来的发展方向进行了展望。电化学及光化学液体环境透射电子显微镜技术在为各类催化反应的机理研究提供有力的技术支持的同时,其分辨率问题以及电子束与材料的相互作用等方面所带来的假象应当引起研究人员的重视。
Keyword ：
光催化 光催化 电催化 电催化 原位 原位 能源材料 能源材料 液体环境 液体环境 透射电子显微镜 透射电子显微镜
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| GB/T 7714 | 王越帅 , 黄国裕 , 沈志桐 et al. 电化学及光化学液体环境透射电子显微镜技术在能源催化研究领域的应用 [J]. | 北京工业大学学报 , 2023 , (10) : 1126-1140 . |
| MLA | 王越帅 et al. "电化学及光化学液体环境透射电子显微镜技术在能源催化研究领域的应用" . | 北京工业大学学报 10 (2023) : 1126-1140 . |
| APA | 王越帅 , 黄国裕 , 沈志桐 , 卢岳 , 隋曼龄 . 电化学及光化学液体环境透射电子显微镜技术在能源催化研究领域的应用 . | 北京工业大学学报 , 2023 , (10) , 1126-1140 . |
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Abstract ：
本发明涉及一种TiO2/Cs2AgBiBr6复合催化剂及其制备方法与应用，属于光催化技术领域。本发明TiO2/Cs2AgBiBr6复合催化剂由纳米TiO2催化剂和Cs2AgBiBr6晶体组成，纳米TiO2催化剂负载于Cs2AgBiBr6晶体表面。本发明将CsBr、AgBr和BiBr3研磨混合得到前驱体粉末；将前驱体粉末平铺在称量纸上，将称量纸漂浮在去离子水面使去离子水逐渐浸润前驱体粉末，浸润过程中前驱体粉末颜色由浅变深，颜色变化停止后，将浸润后的粉末取出，烘干即得Cs2AgBiBr6晶体粉末；将Cs2AgBiBr6晶体粉末和纳米TiO2催化剂加入到研磨容器中，在相对湿度＞50％条件下湿磨5～10min纳米TiO2催化剂负载于Cs2AgBiBr6晶体表面得到TiO2/Cs2AgBiBr6复合催化剂。本发明TiO2纳米颗粒负载在Cs2AgBiBr6晶体上，有效促进光生电子的分离和转移，在可见光下高效催化CO2气体还原选择性转为CO气体。
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| GB/T 7714 | 卢岳 , 梁贺贺 , 隋曼龄 . 一种TiO2/Cs2AgBiBr6复合催化剂及其制备方法与应用 : CN202310529010.3[P]. | 2023-05-11 . |
| MLA | 卢岳 et al. "一种TiO2/Cs2AgBiBr6复合催化剂及其制备方法与应用" : CN202310529010.3. | 2023-05-11 . |
| APA | 卢岳 , 梁贺贺 , 隋曼龄 . 一种TiO2/Cs2AgBiBr6复合催化剂及其制备方法与应用 : CN202310529010.3. | 2023-05-11 . |
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Abstract ：
Surface modification is an effective approach for overcoming the interfacial degradations to enable high electrochemical performance of battery materials, yet it is still challenging to realize high-quality surface modification with simple processing, low cost, and mass production. Herein, a thermal-induced surface precipitation phenomenon is reported in a Ti-dopped LiCoO2, which can realize an ultrathin (approximate to 5 nm) and uniform surface modification by a simple annealing process. It is revealed that surface Li-deficiency enables bulk Ti to precipitate and segregate on the non-(003) surface facets, forming a Ti-enriched disordered layered structure. Such a surface modification layer can not only stabilize the interfacial chemistry but also significantly improve the charge/discharge reaction kinetics, leading to much-improved cycling stability and rate capability. Dopants surface precipitation is a unique outward diffusion process, which differs from the current surface modification techniques and further diversifies these approaches for realizing high-quality surface modification of battery materials.
Keyword ：
electron microscopy electron microscopy surface modifications surface modifications lithium-ion batteries lithium-ion batteries LiCoO2 LiCoO2 dopant precipitation dopant precipitation
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| GB/T 7714 | Li, Jinhui , Zhang, Zhengfeng , Qin, Changdong et al. Thermal-Induced Dopant Precipitation Enabling High-Quality Surface Modification of LiCoO2 [J]. | SMALL , 2023 , 19 (42) . |
| MLA | Li, Jinhui et al. "Thermal-Induced Dopant Precipitation Enabling High-Quality Surface Modification of LiCoO2" . | SMALL 19 . 42 (2023) . |
| APA | Li, Jinhui , Zhang, Zhengfeng , Qin, Changdong , Jiang, Yuyuan , Han, Xiao , Xia, Yueming et al. Thermal-Induced Dopant Precipitation Enabling High-Quality Surface Modification of LiCoO2 . | SMALL , 2023 , 19 (42) . |
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Abstract ：
透射电子显微镜(简称透射电镜)是能够直观分析材料微结构的最重要工具之一。在透射电镜近百年的发展历史中，近些年来球差校正透射电镜的研发与应用乃是最具革命性的发展，不但进一步延伸了通向微观世界之路，更为材料科学的快速发展提供了关键的工具与研究方法。文章通过介绍球差校正透射电镜的原理、优势、应用及发展，来回答“什么是球差校正透射电镜”，“球差校正透射电镜有什么突出作用”，“球差校正透射电镜除了拍原子还能做什么”这三个问题。
Keyword ：
球差校正透射电镜 球差校正透射电镜 透射电子显微镜 透射电子显微镜 原理及应用 原理及应用
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| GB/T 7714 | 柯小行 , 隋曼龄 . 当谈论球差校正透射电镜时，我们在谈论什么？ [J]. | 物理 , 2022 , 51 (07) : 473-484 . |
| MLA | 柯小行 et al. "当谈论球差校正透射电镜时，我们在谈论什么？" . | 物理 51 . 07 (2022) : 473-484 . |
| APA | 柯小行 , 隋曼龄 . 当谈论球差校正透射电镜时，我们在谈论什么？ . | 物理 , 2022 , 51 (07) , 473-484 . |
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Abstract ：
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.
Keyword ：
Electron energy loss spectroscopy(EELS) Electron energy loss spectroscopy(EELS) Single-atom catalyst Single-atom catalyst Transmission electron microscopy (TEM) Transmission electron microscopy (TEM) Energy dispersive X-ray spectroscopy(EDX) Energy dispersive X-ray spectroscopy(EDX) Scanning transmission electron microscopy(STEM) Scanning transmission electron microscopy(STEM) In-situ TEM In-situ TEM
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| GB/T 7714 | Wang Guowei , Ke Xiaoxing , Sui Manling . Advanced TEM Characterization for Single-atom Catalysts: from Ex-situ Towards In-situ [J]. | CHEMICAL RESEARCH IN CHINESE UNIVERSITIES , 2022 , 38 (5) : 1172-1184 . |
| MLA | Wang Guowei et al. "Advanced TEM Characterization for Single-atom Catalysts: from Ex-situ Towards In-situ" . | CHEMICAL RESEARCH IN CHINESE UNIVERSITIES 38 . 5 (2022) : 1172-1184 . |
| APA | Wang Guowei , Ke Xiaoxing , Sui Manling . Advanced TEM Characterization for Single-atom Catalysts: from Ex-situ Towards In-situ . | CHEMICAL RESEARCH IN CHINESE UNIVERSITIES , 2022 , 38 (5) , 1172-1184 . |
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Abstract ：
Metallic MoS2 (i.e., 1T-MoS2) is considered as the most promising precious-metal-free electrocatalyst with outstanding hydrogen evolution reaction (HER) performance in acidic media comparable to Pt. However, sluggish kinematics of HER in alkaline media and its inability for the oxygen evolution reaction (OER), hamper its development as bifunctional catalysts. The instability of 1T-MoS2 further impedes its applications for scaling up, calling an urgent need for simple synthesis to produce stable 1T-MoS2. In this work, the challenge of 1T-MoS2 synthesis is first addressed using a direct one-step hydrothermal method by adopting ascorbic acid. 1T-MoS2 with flower-like morphology is obtained, and transition metals (Ni, Co, Fe) are simultaneously doped into 1T-MoS2. Ni-1T-MoS2 achieves an enhanced bifunctional catalytic activity for both HER and OER in alkaline media, where the key role of Ni doping as single atom is proved to be essential for boosting HER/OER activity. Finally, a Ni-1T-MoS2||Ni-1T-MoS2 electrolyzer is fabricated, reaching a current density of 10 mA cm(-2) at an applied cell voltage of only 1.54 V for overall water splitting.
Keyword ：
(2) (2) overall water splitting overall water splitting bifunctional electrocatalysts bifunctional electrocatalysts hydrothermal synthesis hydrothermal synthesis 1T-MoS 1T-MoS doping doping
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| GB/T 7714 | Wang, Guowei , Zhang, Guikai , Ke, Xiaoxing et al. Direct Synthesis of Stable 1T-MoS2 Doped with Ni Single Atoms for Water Splitting in Alkaline Media [J]. | SMALL , 2022 , 18 (16) . |
| MLA | Wang, Guowei et al. "Direct Synthesis of Stable 1T-MoS2 Doped with Ni Single Atoms for Water Splitting in Alkaline Media" . | SMALL 18 . 16 (2022) . |
| APA | Wang, Guowei , Zhang, Guikai , Ke, Xiaoxing , Chen, Xiangyu , Chen, Xu , Wang, Yueshuai et al. Direct Synthesis of Stable 1T-MoS2 Doped with Ni Single Atoms for Water Splitting in Alkaline Media . | SMALL , 2022 , 18 (16) . |
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