检索结果-南通市图书馆

Journal of Energy Chemistry 2022年第1期31卷 129-135,I0005页

作者： qingbin liu Li Xu Shizhen liu Zhonghua Xiang State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Petrochemical Research Institute PetroChina Company LimitedBlock 42.CNPC Innovation BaseChangping District.Beijing 102206.China

Hierarchically porous architecture of ir on-nitroge n-carb on(Fe-N-C)for oxyge n reducti on reaction(ORR)is highly desired towards efficient mass transfer in the fuel cell device ***,we reported a binary ligand strategy to prepare zeolitic imidazolate frameworks(ZIFs)-derived precursors,wherein the addition of secondary ligand endows precursors with the capabilities to transform into porously interweaved encapsulation-nanotubes structured composites after *** optimal catalyst,i.e.,termed as Fe_(6)-M/C-3,exhibits excellent durability with 88.8%current retention after 50,000 seconds in 0.1 M HClO_(4)solution by virtue of nanoparticles-encapsulation features,which is more positive than the benchmark commercial 20 wt%Pt/C ***,a promising maximum power density of Fe_(6)-M/C-3 as cathode catalyst was also dem on strated in proton exchange membrane fuel cells(PEMFCs)***,this binary ligand approach to the fabrication of hierarchically porous structures would also have significant implications for various other electrochemical reactions.

关键词： Oxygen reduction reaction Binary ligand strategy Interweaved encapsulation-nanotubes architecture Proton exchange membrane fuel cells

Fusing Carbocycles of Inequivalent Ring Size to a Bis(imino)pyridine-Iron Ethylene Polymerization Catalyst: Distinctive Effects on Activity, PE Molecular Weight, and Dispersity

在线全文

学校读者我要写书评

暂无评论

Research 2019年第1期2019卷 442-456页

作者： Zheng Wang Gregory A.Solan Yanping Ma qingbin liu Tongling Liang Wen-Hua Sun Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science Institute of ChemistryChinese Academy of SciencesBeijing 100190China CAS Research/Education Center for Excellence in Molecular Sciences University of Chinese Academy of SciencesBeijing 100049China Department of Chemistry University of LeicesterUniversity RoadLeicester LE17RHUK College of Chemistry and Material Science Hebei Normal UniversityShijiazhuang 050024China State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

The 4,6-bis(arylimino)-1,2,3,7,8,9,10-heptahydrocyclohepta[b]quinoline-iron(II)chlorides(aryl=2,6-Me_(2)C_(6)H_(3) Fe1;2,6-Et_(2)C_(6)H_(3) Fe_(2);2,6-i-Pr_(2)C_(6)H_(3) Fe_(3);2,4,6-Me3C_(6)H_(2) Fe4;and 2,6-Et_(2)-4-Me_(2)C_(6)H_(2) Fe_(5))have been prepared in good yield by a straightforward one-pot reaction of 2,3,7,8,9,10-hexahydro-1H-cyclohepta[b]quinoline-4,6-dione,FeCl_(2)·4H_(2)O,and the appropriate aniline in acetic *** ferrous complexes have been characterized by elemental analysis and FT-IR *** addition,the structure of Fe_(3) has been determined by single crystal X-ray diffraction,which showed the iron center to adopt a distorted square pyramidal geometry with the saturated sections of the fused six-and sevenmembered carbocycles to be *** combination with either MAO or MMAO,Fe1–Fe5 exhibited exceptionally high activities for ethylene polymerization(up to 15:86×10^(6) g(PE)mol^(−1)(Fe)h^(−1) at 40℃(MMAO)and 9:60×10^(6) g(PE)mol^(−1)(Fe)h^(−1) at 60℃(MAO))and produced highly linear polyethylene(HLPE,Tm≥128℃)with a wide range in molecular weights;in general,the MMAO-promoted polymerizations were more *** of the cocatalyst employed,the 2,6-Me_(2)-substituted Fe1 and Fe4 proved the most active while the more sterically hindered 2,6-i-Pr_(2) Fe_(3) the least but afforded the highest molecular weight polyethylene(Mw:65.6–72.6 kg mol^(-1)).Multinuclear NMR spectroscopic analysis of the polymer formed using Fe4/MMAO at 40℃ showed a preference for fully saturated chain ends with a broad bimodal distribution a feature of the GPC trace(Mw/Mn=13:4).By contrast,using Fe4/MAO at 60℃ a vinyl-terminated polymer of lower molecular weight(Mw=14:2 kg mol^(−1))was identified that exhibited a unimodal distribution(Mw/Mn=3:8).Moreover,the amount of aluminoxane cocatalyst employed,temperature,and run time were also found to be influential on the modality of the polymer.

关键词： saturated polymerization straight

A review of the gas hydrate phase transition with a microfluidic approach

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy Reviews 2023年第1期2卷 1-15页

作者： qingbin liu Yingying liu Jintao Xu Ying Teng Zheng Ling Yi Zhang Lanlan Jiang Yongchen Song Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education Dalian University of TechnologyDalian116024China Shenzhen Key Laboratory of Deep Engineering Sciences and Green Energy Institute of Deep Earth Sciences and Green EnergyCollege of Civil and Transportation EngineeringShenzhen UniversityShenzhen518060China Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Shenzhen UniversityShenzhen518060China

Over the years,natural gas hydrates(NGHs)have attracted significant attention as an emerging energy *** is a novel technology used to observe the behaviour of NGHs in microchannels directly and has been applied to *** hydrate distributions and phase transitions are key parameters for exploitation and *** this paper,advances in related research with microfluidics-based technology are reviewed,including the hydrate phase transition process and its mechanism of *** formation and decomposition directly influence the efficiency and sustainability of *** addition,studies of the hydrate phase transition provide basic data for future commercial ***,extended applications,further developments and potential improvements in microfluidic techniques are also *** believe that with an improved understanding of the hydrate phase transition mechanism,commercial exploitation of hydrates can be expected soon.

关键词： Clathrate hydrate Microfluidics Morphology Experimental CO_(2)sequestration

氢化物发生原子荧光光谱法测定钢铁及合金材料中痕量铋

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

光谱学与光谱分析 2000年第1期20卷 84-86页

作者：刘庆彬钢铁研究总院测试所北京100081

采用氢化物发生原子荧光光谱法 ,研究了用硫代氨基脲—抗坏血酸及磷酸作干扰抑制剂消除大量基体元素干扰 ,提出了钢铁及合金材料中痕量铋的分析方法。方法的检出限为Bi=0 0 2 μg·g-1( 3δ ,n =11,0 2 0 0 0 g试样 )。用该方法分析... 详细信息

采用氢化物发生原子荧光光谱法 ,研究了用硫代氨基脲—抗坏血酸及磷酸作干扰抑制剂消除大量基体元素干扰 ,提出了钢铁及合金材料中痕量铋的分析方法。方法的检出限为Bi=0 0 2 μg·g-1( 3δ ,n =11,0 2 0 0 0 g试样 )。用该方法分析了中低合金钢 ,铁镍基、镍基、钴基高温合金 ,铜合金等样品 ,获得了满意的结果。

关键词：钢铁合金材料铋原子荧光光谱法

还原性气氛中铂铑10-铂热电偶的脆断失效及应用研究

在线全文

学校读者我要写书评

暂无评论

稀有金属材料与工程 2000年第5期29卷 357-359页

作者：刘庆宾重庆仪表材料研究所重庆400700

试验证实了高温下铂铑 10 -铂热电偶在 H2 或 CO气氛中使用时因脆性而会很快断裂失效。采用透射电镜(TEM)对脆断偶丝进行了研究认为 :脆断失效的根本原因在于 Si与 Pt作用形成 Pt5 Si2 低熔点共晶物 ,使偶丝局部熔点降低而熔化 ,发生脆... 详细信息

试验证实了高温下铂铑 10 -铂热电偶在 H2 或 CO气氛中使用时因脆性而会很快断裂失效。采用透射电镜(TEM)对脆断偶丝进行了研究认为 :脆断失效的根本原因在于 Si与 Pt作用形成 Pt5 Si2 低熔点共晶物 ,使偶丝局部熔点降低而熔化 ,发生脆断。通过采用 Sol Gel Dip Coating工艺在铂铑 10 -铂热电偶丝上成功制备了 Al2 O3· Y2 O3涂层。对涂层铂铑 10 -铂热电偶分别在 H2 和 CO还原性气氛中进行了试验研究 ,结果表明涂层铂铑 10 -铂热电偶试样可通过还原性气氛中长期稳定性试验。

关键词：铂铑10-铂热电偶还原气氛脆性断裂温度测量

Completion pneumonectomy An effective procedure to benign and malignant diseases of the residual lung

在线全文

学校读者我要写书评

暂无评论

吉林大学学报(医学版) 1997年第3期 69-73页

作者： Tong Li,Fan Zhimin,Fu Qiang,Meng qingbin,liu Guojin ( Department of Surgical Oncology,First Clinical College ) \ \

回顾研究完结性全肺切除术。它是指手术切除从前经历过部分肺切除术后遗留下的残肺的一种手术。此种手术技术上困难，据文献报道，手术死亡率和并发症发生率均高于标准的全肺切除术。在过去的２３年里，先后有７５例病人，年龄从１５岁... 详细信息

回顾研究完结性全肺切除术。它是指手术切除从前经历过部分肺切除术后遗留下的残肺的一种手术。此种手术技术上困难，据文献报道，手术死亡率和并发症发生率均高于标准的全肺切除术。在过去的２３年里，先后有７５例病人，年龄从１５岁到７５岁，因再发原发癌（ｎ＝１５）、复发癌（ｎ＝３８）或良性胸膜肺疾病（ｎ＝２２），在我院和加拿大拉瓦尔医院接受完结性肺切除术。从首次手术到完结性全肺切除术的间隔，肺癌病人平均为２９个月，肺良性疾病平均为２１７个月。共有６例病人于术中（ｎ＝２）或术后早期（ｎ＝４）死亡。手术死亡率为８．０％，其中，肺癌病人手术死亡率为９．４％，肺良性疾病病人为４．５％。本病组例治疗结果提示，完全性全肺切除术手术危险性与标准全肺切除术所报道的相近，该手术值得推荐。

关键词： Completion pneumonectomy Residual lung Second primary cancer Local recurrence

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

分子碘催化的有机化学反应

化学进展 2006年第2期18卷 270-280页

作者：张占辉刘庆彬河北师范大学化学化工研究所

从有机合成化学的角度,按反应类型综述了分子碘作为催化剂在有机化学中的应用,碘催化的反应主要涉及保护基团的形成和裂解、氧化和还原反应、成环反应、加成反应、取代反应和重排反应等。

关键词：碘催化剂有机反应有机合成应用

在线全文

学校读者我要写书评

暂无评论

CO_2均相催化氢化研究进展

有机化学 2017年第8期37卷 1978-1990页

作者：李勇王征刘庆彬河北师范大学化学与材料科学学院石家庄050024 中国科学院化学研究所工程塑料重点实验室北京100190 中国科学院大学北京100049

由于近年来可持续发展战略的兴起和对全球变暖问题关注,二氧化碳(CO_2)作为资源用于化学合成已经引起越来越多化学家的兴趣.而在利用CO_2的研究中,催化氢化CO_2是CO_2资源利用的重要手段之一,均相催化反应具有反应条件温和、活性高及催... 详细信息

由于近年来可持续发展战略的兴起和对全球变暖问题关注,二氧化碳(CO_2)作为资源用于化学合成已经引起越来越多化学家的兴趣.而在利用CO_2的研究中,催化氢化CO_2是CO_2资源利用的重要手段之一,均相催化反应具有反应条件温和、活性高及催化体系易于调控等优点,使得CO_2均相催化氢化尤其是催化生产甲酸、甲醛、甲醇以及胺类化合物衍生物等方面成为当前CO_2资源合理利用的重要课题,具有广阔的应用前景.对近年来金属有机络合物催化的均相氢化CO_2的研究进展进行了综述,主要介绍了催化生产甲酸、甲醛、甲醇以及作为C1合成子方面中的均相催化剂的种类与结构、活性与选择性以及均相催化氢化CO_2的反应机理等方面的研究.

关键词：均相催化氢化 CO_2 金属有机络合物

Epitaxial graphene gas sensors on SiC substrate with high sensitivity

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2020年第3期41卷 2-6页

作者： Cui Yu qingbin liu Zezhao He Xuedong Gao Enxiu Wu Jianchao Guo Chuangjie Zhou Zhihong Feng National Key Laboratory of ASIC Hebei Semiconductor Research InstituteShijiazhuang 050051China College of Precision Instrument and Opto-electronics Engineering Tianjin UniversityTianjin 300072China

2D material of graphene has inspired huge interest in fabricating of solid state gas *** this work,epitaxial graphene,quasi-free-standing graphene,and CVD epitaxial graphene samples on SiC substrates are used to fabricate gas *** are introduced into graphene using SF6 plasma treatment to improve the performance of the gas *** epitaxial graphene shows high sensitivity to NO2 with response of 105.1%to 4 ppm NO2 and detection limit of 1 *** higher sensitivity of epitaxial graphene compared to quasi-free-standing graphene,and CVD epitaxial graphene was found to be related to the different doping types of the samples.

关键词： graphene high limit

Pt-10Rh/Pt热偶在还原性气氛中的应用

在线全文

学校读者我要写书评

暂无评论

贵金属 2000年第2期21卷 15-19页

作者：刘庆宾重庆仪表材料研究所中国重庆400700

在Pt、Pt-10Rh中分别加入Y和第二金属组元M得到了符合GB3772·83标准的新型热电偶。采用溶胶 -凝胶涂敷工艺在热电偶丝上制备了Al2 O3·Y2 O3 涂层。对上述涂层的两种热电偶分别在H2 和CO还原性气氛中进行试验 ,结果表明高温下加Y的热... 详细信息

在Pt、Pt-10Rh中分别加入Y和第二金属组元M得到了符合GB3772·83标准的新型热电偶。采用溶胶 -凝胶涂敷工艺在热电偶丝上制备了Al2 O3·Y2 O3 涂层。对上述涂层的两种热电偶分别在H2 和CO还原性气氛中进行试验 ,结果表明高温下加Y的热电偶无法避免脆断失效 ,而经涂层的热电偶和新型热电偶可通过还原性气氛中长期稳定性试验 ,克服了脆断失效问题。涂层的热电偶在钢厂实际应用表明 ,其使用寿命为未涂层的热电偶 2倍以上。

关键词： Pt-Rh热电偶还原气氛溶胶-凝胶涂层