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Fe5C2 nanoparticles as low-cost HER electrocatalyst:the importance of Co substitution

Science Bulletin 2018年第20期63卷 1358-1363页

作者： Siwei Li Pengju Ren Ce Yang Xi Liu Zhen Yin Weizhen Li Hanjun Yang jian Li Xiaoping Wang Yi Wang Ruochen Cao Lili Lin Siyu Yao Xiaodong Wen ding Ma College of Chemistry and Molecular Engineering Peking University Beijing 100871China State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China Syncat@Beijing Synfuels China Technology Co. LtdBeijing 101407China State Key Laboratory of Separation Membranes and Membrane Processes Department of Chemical Engineering Tianjin Polytechnic UniversityTianjin 300387China

Constructing and understanding the doping effect of secondary metal in transition metal carbide(TMC)catalysts is pivotal for the design of low-cost hydrogen evolution reaction(HER) electrocatalysts. In this work, we developed a wet-chemistry strategy for synthesizing Co-modified Fe_5C_2 nanoparticles((Fe_(1-x)Cox)_5C_2 NPs) as highly active HER electrocatalysts in basic solution. The structure of(Fe_(1-x)Cox)_5C_2 NPs was characterized by X-ray diffraction(XRD), extended X-ray absorption fine structure spectra(EXAFS) and scanning/transmission electron microscopy(S/TEM), indicating that the isomorphous substitution of cobalt in the lattice of Fe_5C_2.(Fe_(0.75) Co_(0.25))_5C_2 exhibited the best HER activity(174 mV for j = -10 mA/cm^2). Computational calculation results indicate that Co provides the most active site for HER. X-ray adsorption spectra(XAS) studies further suggested that the electron transfer in Fe–C bonds are enhanced by the substitution of Co, which modulates the hydrogen adsorption on the adjacent electronic-enriched carbon, and therefore promotes HER activity. Our results affirm the design of lowcost bimetallic TMCs based HER catalysts.

关键词： Wet-chemistry synthesis Bimetallic transition metal carbide Iron Cobalt Hydrogenation evolution reaction

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Bidirectional crosstalk between therapeutic cancer vaccines and the tumor microenvironment:Beyond tumor antigens

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Fundamental Research 2023年第6期3卷 1005-1024页

作者： Si-Wei Zhang Han Wang Xiao-Hong ding Yu-Ling Xiao Zhi-ming Shao Chao You Ya-Jia Gu Yi-Zhou jiang Key Laboratory of Breast Cancer in Shanghai Department of Breast SurgeryFudan University Shanghai Cancer CenterShanghai 200032China Department of Radiology Fudan University Shanghai Cancer Center270 Dong’an RoadShanghai 200032China Department of Oncology Shanghai Medical CollegeFudan UniversityShanghai 200032China

Immunotherapy has rejuvenated cancer therapy,especially after anti-PD-(L)1 came onto the *** the many therapeutic options,therapeutic cancer vaccines are one of the most essential *** great progress has been made in research on tumor antigen vaccines,few phase III trials have shown clinical *** of the reasons lies in obstruction from the tumor microenvironment(TME).Meanwhile,the therapeutic cancer vaccine reshapes the TME in an ambivalent way,leading to immune stimulation or immune *** this review,we summarize recent progress on the interaction between therapeutic cancer vaccines and the *** respect to vaccine resistance,innate immunosuppressive TME components and acquired resistance caused by vaccination are both *** the underlying mechanism of this crosstalk provides insight into the treatment of cancer by directly targeting the TME or synergizing with other therapeutics.

关键词： Therapeutic cancer vaccine Tumor microenvironment Acquired resistance Immunosupportive Immunosuppressive

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1870—1914年英国的济贫法制度

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史学集刊 2000年第4期 48-54页

作者：丁建定河南大学历史系河南开封475001

１８７０—１９１４年英国的济贫法制度仍然遵循１８３４年新济贫法所确立的“济贫院内救济原则”。由于社会条件的变化，英国的济贫法制度在１８７０—１９１４年进行了一定程度的改革，但是，这种以对贫困的消极被动性救济而不是积极... 详细信息

１８７０—１９１４年英国的济贫法制度仍然遵循１８３４年新济贫法所确立的“济贫院内救济原则”。由于社会条件的变化，英国的济贫法制度在１８７０—１９１４年进行了一定程度的改革，但是，这种以对贫困的消极被动性救济而不是积极主动性预防为基本特征的济贫法制度已经不能适应英国社会发展的需要。然而，由于特殊的政治原因以及济贫法制度本身的改革，英国的济贫法制度作为以社会保险制度为核心内容的现代社会保障制度的补充而暂时保存下来。

关键词：济贫法制度贫困问题社会改革现代社会保障

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Ultrafast Photodissociation Dynamics of the F State of Sulfur Dioxide by Femtosecond Time-Resolved Pump-Probe Method

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Chinese Physics Letters 2011年第3期28卷 58-61页

作者： ZHANG Dong-Doug NI Qiang LUO Si-Zuo ZHANG Jing LIU Hang XU Hai-Feng JIN ming-Xing ding Da-Jun Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012

A femtosecond pump-probe method is employed to study the dissociation dynamics of sulfur ***_(2)molecules are excited to the F state by absorbing two photons of 267nm femtosecond laser pulses,and ionized by 400nm laser pulses at different delay times between the two *** of both parent ions(SO_(2)^(+))and the fragment ions(SO^(+),S^(+)and O^(+)are *** S0_(2)^(+)transient can be well fitted to a biexponential decay comprising a fast and a slow component of 280fs and 2.97ps lifetimes,*** SO^(+)transient consists of two growth components of 270 fs and 2.50 *** results clearly show that the F state of S0_(2)dissociates along an S-0 *** transients of S^(+)and O^(+),however,have different behavior,which consist of a fast growth and a long decay component.A possible mechanism of the fragment formation is discussed to understand the dissociation dynamics of the F state of SO_(2).

关键词： Femto pump dissociation

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Improvement of Cyclic Stability of Na_(0.67)Mn_(0.8)Ni_(0.1)Co_(0.1)O_(2 )via Suppressing Lattice Variation

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Chinese Physics Letters 2021年第7期38卷 56-61页

作者： Zhongmin Ren Muqin Wang Shuaishuai Chen Lei ding Hua Li jian Liu Jieyun Zheng Zhihong Liu Deyu Wang mingkui Wang Key Laboratory of Optoelectronic Chemical Materials and Devices School of Chemical and Environmental EngineeringJianghan UniversityWuhan 430056China Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China Wuhan National Laboratory for Optoelectronics Huazhong University of Science&TechnologyWuhan 430074China Institute of Physics Chinese Academy of SciencesBeijing 100190China

Strategies to prolong operational life are highly pursued to strengthen the advantage of cost-effectiveness on sodium-ion batteries(SIBs).We demonstrate the crucial influence of particles'internal mechanical strains on durability of cathode,which does not attract enough attentions from the *** the investigated samples,2%Ti-modified-Na_(0.67)Ni_(0.1)Co_(0.1)Mn_(0.8)O_(2 )suppresses the c-axis lattice variation by 38%,attains the reversible capacity 86%higher after 200 cycles,and still keeps intact *** approach indicates that the mechanical properties could tailor cyclic stability of cathode,which is particular important to further improve competitiveness for SIBs.

关键词： Lattice durability Cyclic

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各向异性介质缺陷单负媒质光子晶体的新型缺陷模

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光子学报 2013年第5期42卷 615-618页

作者：李建明湖北第二师范学院物理与电子信息学院武汉430205

电负媒质和磁负媒质组成的一维光子晶体中存在一种几乎不受电磁波入射角和极化影响的零相位能隙.为了能够调节这种能隙的频率,通过在此类光子晶体中心插入一层各向异性媒介,构造出两层电负和磁负媒质交替的一维光子晶体.采用Berreman 4... 详细信息

电负媒质和磁负媒质组成的一维光子晶体中存在一种几乎不受电磁波入射角和极化影响的零相位能隙.为了能够调节这种能隙的频率,通过在此类光子晶体中心插入一层各向异性媒介,构造出两层电负和磁负媒质交替的一维光子晶体.采用Berreman 4×4矩阵法计算了该结构的透射谱,结果显示:调节双轴晶体主轴围绕实验坐标系z轴的旋转角度可以改变缺陷模频率的大小,并且该缺陷模的频率不随入射角度的变化而改变.该特性可以用于光波频率可调的单通道窄带滤波器的制作.

关键词：零有效相位能隙缺陷模单通道可调滤波器

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Cloning and Expression of Key Enzyme Gene GalAT in Ramie Pectin Biosynthesis

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Agricultural Sciences in China 2009年第6期8卷 664-670页

作者： LIU jian-xin YU Chun-ming TANG Shou-wei ZHU Ai-guo WANG Yan-zhou ZHU Si-yuan MA Xiong-feng XIONG He-ping Institute of Bast Fiber Crops Chinese Academy of Agricultural Sciences Changsha 420105 P.R.China Cotton and Fibre Research Institute ofXiaoshan Zhejiang Academy of Agricultural Sciences Hangzhou 311202 P.R.China

To isolate the cDNA partial sequence of key enzyme gene GalAT for pectin biosynthesis in ramie [Boehmeria nivea （L.） Gaud], and thus to understand the expression of GalAT gene in different tissues of ramie, degenerate primer was designed according to GalAT conserved sequence in other species reported, and the cDNA sequence of GalAT gene from ramie variety Zhongzhu 1 was cloned by RT-PCR method based on the degenerate primer. The cDNA revealed a 986-bp in length which encoded 328 amino acids. The cDNA sequence and putative amino acid sequence of GalAT shared high identity with previously reported Arabidopsis thaliana GA UT4 （GalAT） as 77 and 83%, respectively. Molecular evolution analysis showed that the putative amino acid sequence and Arabidopsis thaliana GAUT4 gathered to a same group. Real-time quantitative PCR analysis showed that GalAT mRNA accumulated most abundantly in root, and GalAT transcripts in all kinds of ramie tissues in turn revealed as follows： root 〉 leaf〉 bast 〉 or ≈ xylem.

关键词： clone GalA T pectin ramie real-time quantitative PCR analysis

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Enhanced adsorption performance for antibiotics by alcohol-solvent mediated boron nitride nanosheets

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Rare Metals 2022年第1期41卷 342-352页

作者： Hao-Feng Wu Yan-Hong Chao Guo-Hua Xia Jing Luo Duan-jian Tao Lin-Hua Zhu Gui-Ling Luo Yan Huang ming-Qing Hua Wen-Shuai Zhu School of Pharmacy Jiangsu UniversityZhenjiang 212013China School of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang 212013China College of Chemistry and Chemical Engineering Jiangxi Normal UniversityNanchang 330022China Key Laboratory of Water Pollution Treatment and Resource Reuse of Hainan Province College of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158China School of Environment and Safety Engineering Jiangsu UniversityZhenjiang 212013China

The development of high-efficient adsorbents for the treatment of antibiotics from contaminated water has been of great *** work introduced an alcohol-solvent mediated strategy to increase the specific surface area(SSA)and porosity of hexagonal boron nitride nanosheets(BNNSs)for improving tetracycline(TC)removal *** BNNSs synthesized with the mediation of n-propanol solvent(BN-P)exhibited the largest pore volume and relatively high SSA(increased by 34%and 64%,respectively,compared with that synthesized under the mediation of water)in its structure,which in turn facilitated the mass transfer of TC molecules onto BN-P *** remarkable adsorption performance of BN-P,with 20%increase in equilibrium adsorption capacity and Langmuir maximum adsorption capacity of 556 mg·g^(-1),was achieved for capturing TC within just 3 h,which is mainly through p-p interaction and electrostatic ***-second kinetics equation can well illustrate the adsorption process,while Freundlich and Langmuir isotherm models fitted the equilibrium data *** study demonstrated a spontaneous exothermal adsorption ***,the strong environmental suitability and notable recycling performance of BN-P revealed its good application prospect in removing antibiotic TC from wastewater.

关键词： Water treatment Boron nitride nanosheets Adsorption Antibiotics Solvent mediation

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PERFORMANCE ENHANCEMENT OF CdS NANOROD ARRAYS/P3HT HYBRID SOLAR CELLS VIA N719 DYE INTERFACE MODIFICATION

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Chinese Journal of Polymer Science 2013年第6期31卷 879-884页

作者： Ya-xiong Nan Jun-jie Li Wei-fei Fu Wei-ming Qiu Li-jian Zuo Hong-bin Pan Quan-xiang Yan Xiao-qiang Chen 陈红征 State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and Functionalization and Department of Polymer Science and Engineering Zhejiang University

Improved hybrid solar cells consisting of vertical aligned cadmium sulfide （CdS） nanorod arrays and interpenetrating polythiophene （P3HT） have been achieved via modification of CdS nanorod surface by using conjugated N719 dye. The complete infiltration of P3HT between CdS nanorods interspacing was verified by scanning electron microscopy. By employing absorption and photoluminescence spectra, and current-voltage characterization the interaction between N719 molecules and CdS nanorods/P3HT interface was explored, and the role of N719 dye on the improvement of device performance was discussed.

关键词： CdS nanorods Hybrid solar cells N719 Interface modification.

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计算机导航及机器人技术辅助膝关节单髁置换术的研究进展

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中国修复重建外科杂志 2017年第1期31卷 110-115页

作者：姚坚丁海蚌埠医学院第一附属医院骨科安徽蚌埠233000

目的总结计算机导航及机器人技术在膝关节手术中的分类,以及辅助膝关节单髁置换术(unicompartmental knee arthroplasty,UKA)的发展、手术适应证和禁忌证、临床疗效及最新进展。方法广泛查阅计算机导航及机器人技术辅助UKA的相关文献,... 详细信息

目的总结计算机导航及机器人技术在膝关节手术中的分类,以及辅助膝关节单髁置换术(unicompartmental knee arthroplasty,UKA)的发展、手术适应证和禁忌证、临床疗效及最新进展。方法广泛查阅计算机导航及机器人技术辅助UKA的相关文献,并进行研究和总结分析。结果近年来UKA在治疗单间室膝关节骨性关节炎方面取得了令人满意的效果,随着计算机导航及手术机器人技术的飞速发展并逐渐与临床相结合,计算机导航及机器人技术联合UKA大大提高了术中截骨的精度及假体植入准确率,术后功能恢复良好的同时明显提高了单髁假体的使用寿命。结论计算机导航及机器人技术辅助UKA较传统UKA提高了假体植入精确度,术后早期疗效满意,但长期疗效仍有待进一步观察。

关键词：膝关节单髁置换术计算机导航机器人辅助导航系统

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