|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | AgPdCo hollow nanospheres electrocatalyst with high activity and stability toward the formate electrooxidation显示文摘The widespread commercial application of direct formate fuel cell(DFFC)is limited by the lack of efficient electrocatalysts for the formate oxidation reaction(FOR).AgPdCo hollow nanospheres(H-NSs)with jagged surfaces are successfully synthesized via a facile method involving the wet-chemical synthesis of AgPdCo nanospheres(NSs)and galvanic replacement reaction between Pd salt and AgPdCo NSs.Surpassing Ag_(30)Pd_(69)Co_(1) NSs and most of previously reported electrocatalysts,Ag_(9)Pd_(90)Co_(1) H-NSs exhibit extremely high FOR activity with a peak current density of 3.08 A·mg_(Pd)^(−1).Apart from the competitive activity,Ag_(9)Pd_(90)Co_(1) H-NSs show greatly improved chronoamperometric and cycling stability,whereby the current density retains about 0.24 A·mg_(Pd)^(−1) after 3,600 s electrocatalysis and the mass activity maintains 54.06%of the initial value after 500 cycles.The unique hollow nanosphere and synergistic effect are responsible for the enhanced activity and stability.This study will provide new clues for the development of outstanding electrocatalysts. | Qiao Wang Fuyi Chen Quan Tang Longfei Guo Tao Jin Bowei Pan Junpeng Wang Zhen Li Bo Kou Weiqi Bian | 2021 | Nano Research2021，14，7： | 1 |
| 2 | Composition Distribution in the MnxCd(1-x)In2Te4 Ingot Grown by ACRT-B Method显示文摘MnxCd1-xIn2Te4 (x=0.1) ingot was successfully grown by the modified Bridgman technique, which applied the accelerated crucible rotation technique (ACRT) in Bridgman process, or briefly ACRT-B. The growth interface profile shape and the composition distribution in the MnxCd1-xIn2Te4 (x=0.1) ingot were analyzed. Even though the stoichiometric composition was synthesized in the original ingot, the composition has been redistributed during the ACRT-B growth process. Mn and Cd contents decrease while In increases along the longitudinal axis. The partition ratios of solutes Mn, Cd and In at the growth interface are evaluated by a mathematical method based on the experimental data, which are found to be 1.286, 1.926 and 0.729 in α phase growth process, and 1.120, 1.055 and 0.985 in/3 phase growth process, respectively. In the radial direction,Mn and Cd contents increase while In decreases with the distance from the centerline of the ingot. | Yongqin CHANG, Wanqi JIE, Xiping GUO, Fuyi CHEN and Weijun ANState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China | 2003 | Journal of Materials Science & Technology2003，19，6： | 0 |
| 3 | Experimental observation of multiple topological nodal structure in LaSb_(2)显示文摘Unconventional fermions in the immensely studied topological semimetals are the source for rich exotic topological properties.Here,using symmetry analysis and first-principles calculations,we propose the coexistence of multiple topological nodal structure in LaSb_(2),including topological nodal surfaces,nodal lines and in particular eightfold degenerate nodal points,which have been scarcely observed in a single material.Further,utilizing angle-resolved photoemission spectroscopy,we confirm the existence of nodal surfaces and eightfold degenerate nodal points in LaSb_(2).The intriguing multiple topological nodal structure might play a crucial role in giving rise to the large linear magnetoresistance.Our work renews the insights into the exotic topological phenomena in LaSb_(2). | Yuxi Qiao Fuyi Wang Huaiqiang Wang Zicheng Tao Zhicheng Jiang Zhengtai Liu Soohyun Cho Fayuan Zhang Qingkai Meng Wei Xia Yichen Yang Zhe Huang Jishan Liu Zhonghao Liu Zengwei Zhu Shan Qiao Yanfeng Guo Haijun Zhang Dawei Shen | 2024 | Science China(Physics,Mechanics & Astronomy)2024，67，4： | 0 |
| 4 | Closely packed Si@C and Sn@C nano-particles anchored by reduced graphene oxide sheet boosting anode performance of lithium ion batteries显示文摘Both silicon and tin are promising anodes for new generation lithium ion batteries due to high lithium storage capacities(theoretically 4200 mA h g^(-1) and 992 mA h g^(-1),respectively).However,their large volumetric expansions(both are above 300%)usually lead to poor cycling stability.In this case,we synthesized closely packed Si@C and Sn@C nano-particles anchored by reduced graphene oxide(denoted as Si@C/Sn@C/rGO)by the way of solution impregnation and subsequent hydrogenation reduction.Sn particles with a diameter of 100 nm are coated by carbon and surrounded by Si@C particles around 40 nm in average diameter through the high-resolution transmission electron microscopy.Expansions of Si and Sn are alleviated by carbon shells,and reduced graphene oxide sheets accommodate their volume changes.The prepared Si@C/Sn@C/rGO electrode delivers an enhanced initial coulombic efficiency(78%),rate capability and greatly improved cycle stability(a high reversible capacity of nearly 1000 mA h g^(-1) is achieved after 300 cycles at a current density of 1000 mA g^(-1)).It can be believed that packing Sn@C nano-particles with Si@C relieves the volume expansion of both and releases the expansion stresses.Sn@C particles enhance anode process kinetics by reducing charge transfer resistance and increasing lithium ion diffusion coefficient.The present work provides a viable strategy for facilely synthesizing silicon-tin-carbon composite anode with long life. | Chaoye Zhu Yao Zhang Ziqiang Wu Zhihong Ma Xinli Guo Fuyi Guo Jiakun Zhang Yushu Li | 2021 | Journal of Materials Science & Technology2021，，28： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员