检索结果-南通市图书馆

Journal of Energy Chemistry 2022年第7期31卷 614-622,I0015页

作者： Shiyu Ma hongchang yao Zhongjun Li Qingchao Liu Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou 450001HenanChina

Li-O_(2) batteries provide an attractive and potential strategy for energy conversion and storage with high specific energy ***,large over-potential in oxygen evolution reactions (OER) caused by the decomposition obstacles of Li_(2)O_(2) seriously impedes its electrochemical ***,a novel N,O,S and F co-doping vesicular carbon was prepared by self-template pyrolysis method and used in LiO_(2) battery to tune the nucleation and decomposition of Li_(2)O_(2).The introduction of F in the carbon matrix with suitable content can regulate the adsorption of intermediates,through which the morphology of Li_(2)O_(2) can be controlled to film,favorable to its decomposition in charge *** cathode based on the optimized F doped carbon vesicle exhibits improved electrochemical performances including a low over-potential,large capacity and a long-term *** functional theory (DFT) results show that F and C in C–F bond hasve a strong interaction to Li and O in Li_(2)O_(2),respectively,which can enhance the transfer of electrons from Li_(2)O_(2) to the carbon matrix to generate hole polaron and thus accelerate the delithiation and decomposition of Li_(2)O_(2).This work provides a new sight into understanding the mechanism of nucleation and decomposition of Li_(2)O_(2) for the development of high-performance Li-O_(2) batteries.

关键词： Li-O_(2)batteries F-doped carbon vesicles DFT Li2O_(2)nucleation and decomposition

Regulating the nucleation of Li_(2)CO_(3) and C by anchoring Li-containing carbonaceous species towards high performance Li-CO_(2) batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第2期31卷 472-479页

作者： Shiyu Ma Youcai Lu hongchang yao Yubing Si Qingchao Liu Zhongjun Li Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou 450001HenanChina

Li-CO_(2) batteries provide an attractive and potential strategy for CO_(2) utilization as well as energy conversion and storage with high specific energy ***,the poor reversibility caused by the decomposition obstacles of Li_(2)CO_(3) and C products is still a challenge for Li-CO_(2) batteries,which seriously influences its electrochemical ***,a free-standing MnOOH arrays cathode has been prepared and employed in Li-CO_(2) battery,which realizes a great improvement of electrochemical performances by adjusting the discharge products *** coupled with theoretical calculations verifies that the formation of Li-containing carbonaceous species(LiCO_(2),LiCO and Li_(2) CO_(3))bonded with MnOOH through Li ion regulates the nucleation behavior of Li_(2)CO_(3) and C,making them grown on MnOOH *** fine Li_(2) CO_(3) grains(with a size about 5 nm)embedded into carbon matrix greatly enlarges the contact interface between them,facilitating the transmission of electrons through the discharge products and finally improves CO_(2) evolution *** ingenious design strategy of regulating discharge products distribution to improve electrochemical performances provides a promising way to develop advanced Li-CO_(2) batteries.

关键词： Li-CO_(2)battery MnOOH arrays Interface Discharge mechanism

Enhancing the process of CO_(2) reduction reaction by using CTAB to construct contact ion pair in Li-CO_(2) battery

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第6期33卷 2933-2936页

作者： Shiyu Ma Youcai Lu hongchang yao Qingchao Liu Zhongjun Li Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou 450001China

Aprotic Li-CO_(2)batteries have attracted growing interest due to their high theoretical energy density and its ability to use green house gas CO_(2)for energy ***,the poor ability of activating CO_(2)in organic electrolyte often leads to the premature termination of CO_(2)reduction reaction(CO_(2)RR)*** in this work,cetyl trimethyl ammonium bromide(CTAB)was introduced into a dimethyl sulfoxide(DMSO)based Li-CO_(2)battery for the first time to enhance the CO_(2)*** improved electrochemical performances,including reduced discharge over-potential and increased discharge capacity,can be achieved with the addition of *** initio molecular dynamics(AIMD)simulations show that quaternary ammonium group CTA^(+) can accelerate CO_(2)reduction process by forming more stable contact ion pair(CIP)with CO_(2)^(–),reducing the energy barrier for CO_(2)RR,thus improving the CO_(2)reduction *** addition,adding CTA^(+) is also favorable for the solution-phase growth of discharge products because of the improved migration ability of stable CTA^(+)-CO_(2)^(–) CIP in the electrolyte,which is beneficial for improving the utilization ratio of *** work could facilitate the development of CO_(2)RR by providing a novel understanding of CO_(2)RR mechanism in organic system.

关键词： CO_(2)reduction reaction Li-CO_(2)battery Quaternary ammonium additive Contact ion pair AIMD

Compulsive malposition of birnessite slab in 2D-Parallel birnessite on β-MnO_(2) networks for enhanced pseudocapacitance performances

在线全文

学校读者我要写书评

暂无评论

Nano Materials Science 2021年第4期3卷 404-411页

作者： Shijin Zhua Wangchen Huo Tian Wang Kailin Li Xiaoying Liu Junyi Ji hongchang yao Fan Dong Yuxin Zhang Lili Zhang College of Materials Science and Engreering Chongqing University Chongqing 400044China Research Center for Environmental Science&Technology Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu611731China Engineering Research Center for Waste Oil Recovery Technology and Equipment Ministry of EducationCollege of Environment and ResourcesChongqing Technology and Business UniversityChongqing 400067 China School of Chemical Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu610065PR China College of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhou CiyHenan Province450001PR China

High electrochemically active bimessite is always desirable pseudocapacitive material for ***,two-dimensional(2D)compulsive malposition parallel bimessite standing on β-MnO_(2) interconnected networks have been *** to the retrition of β-MnO_(2),compulsi ve malposition,slippage of MnO6 slab,occured in bimessite resulting in weaken bi nding force between bimessi te slab and interlayer cations,which enhanced their electrochemical ***,the electrical conductivity of the structure was largely promoted by the 2D charge transfer route and double-exchange mechanism in bimessite,also leading to desirable electro-chemical *** on the fraction of as-prepared nanostructure,the par all bimessite exhibited good pseudocapacitance performance(660 F g^(-1))with high rate *** addition,the asymmetrice supercapacitor assembled by reduced graphene oxide(RGO)and as-prepared nanostructure,which respectively served as the negative and positive eletrode,delivered an energy density of 33.1 Wh kg^(-1) and a mad mum power density of 64.0 kW kg^(-1) with excellent cyeling stability(95.8% after 10000 cycles).Finally,the study opens new avenwes for synthesizing high eletrochemically actiwe bimessite structure for high-performance energy storage devices.

关键词： Parallel birnessite Double-exchange mechanism Supercapacitor Energy storage devices

在线全文

学校读者我要写书评

暂无评论

重视消化系统心身疾病的研究

中华消化杂志 2001年第3期21卷 133-134页

作者：姚宏昌天津市第一中心医院消化科 300192

20世纪中叶以前,人类的疾病谱和死亡谱主要集中于自然疫源性传染病、营养不良性疾病及生物化学性地方病等.随着科学技术的飞速发展以及人们生活水平的不断提高,许多生物及理化致病因素得到了有效的控制和预防,人类的疾病谱和死亡谱发生... 详细信息

20世纪中叶以前,人类的疾病谱和死亡谱主要集中于自然疫源性传染病、营养不良性疾病及生物化学性地方病等.随着科学技术的飞速发展以及人们生活水平的不断提高,许多生物及理化致病因素得到了有效的控制和预防,人类的疾病谱和死亡谱发生了明显的改变.同时与工作紧张、社会竞争、环境污染、噪声等社会心理因素密切相关的心身相关性疾病迅速增加.生物医学模式已经不能完全认识现代疾病,并有效解决临床诊断与治疗问题.因此,医学界提出,生物医学模式必须向生物-心理-社\会医学模式转化,与此相适应心身医学受到了广泛重视.

关键词：消化系统心身疾病诊断治疗

在线全文

学校读者我要写书评

暂无评论

肝性心肌病

临床内科杂志 2001年第2期18卷 95-96页

作者：姚宏昌天津市第一中心医院消化科 300192

肝硬化患者心肌收缩力减弱，在应激情况下尤为明显，这种现象称为肝性心肌病，主要表现为心脏的β-肾上腺素能受体及其信息传递功能减弱，另外可能的机制为心肌细胞膜的生化特性改变、体液因素的异常及高动力循环等。

关键词：肝性心肌病发病机制组织学改变生理应激

S型异质结光催化剂ZnFe_(2)O_(4)/WO_(3)的构筑及光催化还原CO_(2)性能

在线全文

学校读者我要写书评

暂无评论

无机化学学报 2024年第1期40卷 197-208页

作者：刘平朱成才李艳阳要红昌郑州大学化学学院绿色催化中心郑州450001

通过在WO_(3)纳米片表面负载ZnFe_(2)O_(4)纳米颗粒,构建了一系列S型异质结光催化剂ZnFe_(2)O_(4)/WO_(3),并研究了其光催化CO_(2)还原性能。在没有助催化剂和牺牲剂的条件下,所制备的ZnFe_(2)O_(4)/WO_(3)复合材料可对CO_(2)与水蒸汽... 详细信息

通过在WO_(3)纳米片表面负载ZnFe_(2)O_(4)纳米颗粒,构建了一系列S型异质结光催化剂ZnFe_(2)O_(4)/WO_(3),并研究了其光催化CO_(2)还原性能。在没有助催化剂和牺牲剂的条件下,所制备的ZnFe_(2)O_(4)/WO_(3)复合材料可对CO_(2)与水蒸汽进行光催化反应。优化后的材料光照5 h后CO_(2)还原产物CO和CH_(4)的产量分别为7.87和4.88μmol·g^(-1)。相对于单相组分,CO和CH_(4)的产量明显提高。光催化活性的提高,归因于ZnFe_(2)O_(4)和WO_(3)异质结的形成以及光生载流子的S型电荷传输模式。

关键词： CO_(2)还原光催化活性 ZnFe_(2)O_(4)/WO_(3) 异质结 S型电荷传输模式

白三叶草对马尼拉草坪杂草群落及其多样性的影响

在线全文

学校读者我要写书评

暂无评论

南京林业大学学报（自然科学版） 2014年第4期38卷 75-80页

作者：姚和金赵建华姚宏昌万光龙叶飞衢州学院教师教育学院浙江衢州324000 浙江大学继续教育学院浙江杭州310058 浙江省衢州市园林局浙江衢州324000

运用群落生态学研究方法,于2009年至2011年在浙江衢州市对有、无白三叶草入侵的马尼拉草坪(两种类型的草坪立地生态条件一致)中杂草的种类、高度、密度等指标进行调查。结果表明,在有、无白三叶草入侵的两种类型的马尼拉草坪中:2009年、... 详细信息

运用群落生态学研究方法,于2009年至2011年在浙江衢州市对有、无白三叶草入侵的马尼拉草坪(两种类型的草坪立地生态条件一致)中杂草的种类、高度、密度等指标进行调查。结果表明,在有、无白三叶草入侵的两种类型的马尼拉草坪中:2009年、2010年、2011年的杂草种类分别为35、29、22种和47、51、52种;Shannon多样性指数(H/)、Shannon均匀度指数(E)和Margalef物种丰富度指数(DMG)平均值分别为4.97、1.30、0.42和10.17、2.38、0.83。数据分析可知,两种类型草坪杂草的多样性指数呈显著性差异(p<0.05)。实验表明,白三叶草对马尼拉草坪杂草群落多样性有显著性影响(p<0.05),因此尽量不选用白三叶草作为观赏草坪的种植材料。

关键词：白三叶草杂草群落物种多样性观赏草坪

Rehaustorial non-host resistance in Arabidopsis thaliana against the wheat stripe rust fungus requires salicylic Acid but not actin cytoskeietai function

在线全文

学校读者我要写书评

暂无评论

Rehaustorial non-host resistance in Arabidopsis thaliana aga...

第十三届全国植物基因组学大会

作者： Yulin Cheng,hongchang Zhang,Juanni yao,Qingmei Han,Guorong Wei,Lili Huang, Zhensheng Kang~* State Key Laboratory of Crop Stress Biology In Arid Areas and College of Plant Protection, Northwest A&f University,Yangling 712100,China

Stripe rust,caused by Puccinia striiformis ***(Pst),is one of the most destructive diseases of wheat(Triticum aestivum) *** is the preferred method of rust control,but most known host resistance genes have transient e...

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

碳化锆碱熔制备氧氯化锆的研究

稀有金属 2006年第3期30卷 415-418页

作者：李中军黄银霞要红昌杨民乐陈建立郑州大学化学系河南郑州450052 河南佰利联化学股份有限公司河南焦作454591

以碳化锆为原料,采用碱熔-水洗-酸浸-结晶工艺制备氧氯化锆,制得的氧氯化锆产品中ZrO2含量达到36.20%。考察了氢氧化钠与碳化锆物料比、碱熔温度、碱熔时间和碳化锆粒度对碱熔过程中锆转化率的影响,以及水与碱熔料比、水洗温度和水洗时... 详细信息

以碳化锆为原料,采用碱熔-水洗-酸浸-结晶工艺制备氧氯化锆,制得的氧氯化锆产品中ZrO2含量达到36.20%。考察了氢氧化钠与碳化锆物料比、碱熔温度、碱熔时间和碳化锆粒度对碱熔过程中锆转化率的影响,以及水与碱熔料比、水洗温度和水洗时间对水洗过程中除硅率的影响。用X射线衍射分析研究了碳化锆在煅烧碱熔过程中的物相变化。结果表明,碱熔过程中碳化锆转化为偏锆酸钠,碱熔的最佳工艺条件为:氢氧化钠与碳化锆的质量比为1.5,煅烧温度800℃,煅烧时间60 min,矿样粒度120目。在该工艺条件下碱熔,锆的转化率可达到99%以上。

关键词：碳化锆碱熔氧氯化锆