检索结果-南通市图书馆

Mn-modified nitrogen-doped Pt-based electrocatalyst for efficient oxygen reduction in aluminum-air batteries

Nano Research 2024年第8期17卷 7126-7135页

作者： Li Gao Yang Song Xuebing Xu Chang Li chaoquan hu State Key Laboratory of Mesoscience and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Zhongke Nanjing Institute of Green Manufacturing Industry Nanjing 211135China

In this study,a Mn-modified Pt-based catalyst loaded on nitrogen-doped Ketjen black(Mn-Pt/NKB)is prepared using a simple ethylene glycol reduction *** size of Pt nanoparticles(NPs)is effectively controlled by doping with Mn and *** the smallest average particle size of 1.7 nm,Mn-Pt/NKB demonstrates half-wave potentials of 0.890 and 0.688 V in the alkaline and neutral electrolytes,respectively,which are superior to those of commercial platinum on activated carbon(Pt/C).When applied as an air cathode in aluminum-air battery,it exhibits ultra-high power densities of 190(alkaline)and 26.2 mW·cm^(−2)(neutral).Moreover,the voltage remains stable after 5 h of *** practical application performance of the Mn-Pt/NKB catalyst in an aluminum-air battery is better than that of commercial Pt/***,the oxygen reduction reaction(ORR)mechanism on surfaces with different particle sizes is analyzed using density functional *** cracking is the major pathway on the surface of the small particles with lower energy consumption of 0.5 eV,while water molecule cleavage is the major pathway on the surface of the large particles with higher energy consumption of 0.97 *** lower energy consumption of the oxygen cracking pathway further confirms the ORR mechanism for higher activity on small-sized *** study provides a direction for the rational design of Pt-based catalysts for ORR and sheds light on the commercial development of aluminum-air batteries.

关键词： oxygen reduction reaction precious metal catalysts aluminum-air battery density functional theory(DFT)calculations reaction pathway

来源：

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

Phase transfer-based high-efficiency recycling of precious metal electrocatalysts

引用

Green Chemical Engineering 2024年第1期5卷 68-74页

作者： Qing Zeng Shaonan Tian Yu Zhang hui Liu Dong Chen Xinlong Tian chaoquan hu Jun Yang State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing100190China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Lab of Fine ChemistrySchool of Chemical Engineering and TechnologyHainan UniversityHaikou570228China Nanjing IPE Institute of Green Manufacturing Industry Nanjing211100China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China

Recycling precious metals with high-efficiency is undoubtedly beneficial to optimize resource utilization for environmental remediation and sustainable ***,we report an efficient route to recycle the palladium(Pd)and platinum(Pt)electrocatalysts using a phase transfer *** strategy involves acidic dissolution of deactivated precious metal(Pd/Pt)electrocatalysts from their loading substrates,mixing with an ethanolic solution of dodecylamine(DDA),subsequent extraction of metal ions into a non-polar organic phase,and final reduction by sodium borohydride to reproduce high-performance electrocatalysts towards typical electrochemical reactions,e.g.,oxygen reduction reaction(ORR)and ethanol oxidation reaction(EOR).In specific,the transfer efficiencies are up to 98%and the final recovery rate is over 85%for Pd and Pt electrocatalysts in each *** approach symbolizes a facile and efficient way to recover precious metals,which might be applied to recycling a wide range of metals in various realms after appropriate modifications.

关键词： Precious metal Phase transfer Extraction Recovery Electrocatalyst

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

术前减黄对行开腹胰十二指肠切除术的胰头癌或壶腹部癌病人围手术期影响分析

引用

腹部外科 2024年第4期37卷 271-275,286页

作者：胡啸胡朝全中山大学孙逸仙纪念医院肝胆外科广东广州510120 贵州医科大学附属医院肝胆外科贵州贵阳550004

目的探讨术前减黄对胰头癌或壶腹周围癌行开腹胰十二指肠切除术病人围手术期(住院期间或术后≤30 d)的影响。方法回顾性分析贵州医科大学附属医院2019年10月1日到2022年10月1日胰头癌或壶腹周围癌行胰十二指肠切除术73例,其中术前减黄33... 详细信息

目的探讨术前减黄对胰头癌或壶腹周围癌行开腹胰十二指肠切除术病人围手术期(住院期间或术后≤30 d)的影响。方法回顾性分析贵州医科大学附属医院2019年10月1日到2022年10月1日胰头癌或壶腹周围癌行胰十二指肠切除术73例,其中术前减黄33例(减黄组),未减黄病人40例(不减黄组)。比较减黄组(n=33)减黄前(入院时)与减黄后(手术前)总胆红素、谷丙转氨酶、谷草转氨酶、白蛋白、肌酐水平的变化,评估减黄对减黄组病人疗效。分析减黄组与不减黄组在术后并发症上有无统计学差异。采用统计学软件SPSS(21.0版)进行统计学分析。结果减黄组病人术前总胆红素、谷丙转按酸、谷草转氨酸、白蛋白较入院时有所下降(均P0.05)。和不减黄组比较,减黄组可能面临更高的Ⅲ级以上并发症发生率(P0.05)。结论术前减黄能降低胰头癌或壶腹周围癌引起的重度黄疸病人的胆红素水平,改善肝功能,但不影响病人肌酐水平。术前减黄会导致病人血清白蛋白水平下降;术前减黄可能不能减少手术时长、降低术中出血量和术中输血量;不能降低胆漏、胃瘫、腹腔感染、胰瘘、术后出血、伤口感染等发生率,不能降低其他并发症发生率、总并发症发生率及死亡率;不能减少术后住院时间;可能面临着更高的Ⅲ级以上并发症发生率,更长的总住院时间及入院到手术时间。胰头癌或壶腹周围癌引起的重度黄疸(总胆红素≥250μmol/L)病人不宜常规术前减黄。

关键词：胰头癌壶腹周围癌梗阻性黄疸术前减黄并发症

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

论“三个务必”的生成逻辑、理论特质与实践指向

引用

行政与法 2024年第7期 28-38页

作者：侯震胡超权中共吉林省委党校(吉林省行政学院)党史教研部吉林大学材料科学与工程学院

在党的二十大报告中,习近平总书记首次提出“三个务必”。“三个务必”的提出既是党领导人民站起来、富起来、强起来的必然趋势,同时也是顺应实现第二个百年奋斗目标新征程的发展趋势。“三个务必”内涵丰富、逻辑严密、彼此呼应,彰显... 详细信息

在党的二十大报告中,习近平总书记首次提出“三个务必”。“三个务必”的提出既是党领导人民站起来、富起来、强起来的必然趋势,同时也是顺应实现第二个百年奋斗目标新征程的发展趋势。“三个务必”内涵丰富、逻辑严密、彼此呼应,彰显出新时代建设社会主义现代化强国过程中,中国共产党人的奋斗目标、动力源泉、作风修养、精神面貌的集中统一。“三个务必”是中国共产党人牢记初心使命的重要体现,凸显了百年大党对理想信念的执着坚守、慎终如始的忧患意识和永不懈怠的进取精神。“三个务必”孕育于党的百年奋斗征程之中,形成于新时代取得的历史性成就、发生的历史性变革之中,既昭示出中国共产党人勇于自我革命的胆识和魄力,又体现了百年大党常戒常新的优良作风,是新时代新征程中国共产党走好新的赶考之路的重要遵循。“三个务必”映射出百年大党对于执政规律、党的建设规律的深刻认识,对于面向第二个百年奋斗目标新征程上全党统一思想、统一意志、统一行动,在成绩面前保持清醒和坚定,在困难面前敢于斗争、善于斗争,推进中国式现代化行稳致远具有重大的历史意义和现实价值。

关键词： “两个务必” “三个务必” 历史自信自我革命中华优秀传统文化

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Sensitivity analysis of mesoscale structural parameters for simulation of fluidized beds

引用

Particuology 2019年第6期17卷 77-93页

作者： Wenming Liu Hongzhong Li Qingshan Zhu chaoquan hu Sinopec Research Institute of Petroleum Processing Beijing 100083China State Key Laboratory of Multi-Phase Complex Systems Institute of Process EngineeringChinese Academy of SciencesP.O.Box 353Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China

This study presents new numerical drag models with which to analyze the sensitivity of mesoscale structural parameters in bubbling,turbulent,and circulating fluidized *** drag models are derived using the method of transfer-coefficient-based structural parameters(TC-SP).Analyzing the sensitivity of the structural parameters reveals that the coefficients associated with drag are more sensitive to parameters in the dense phase than to those in the dilute phase,especially the superficial slip *** the basis of these results,the TC-SP drag model is simplified ***,despite having half the number of parameters of conventional structure-based drag models,the simplified TC-SP drag model achieves simulation results that are equally or more *** simple calculations and improved accuracy using coarse grids,the model reported in this study is capable of predicting the hydrodynamics of the three types of fluidized beds.

关键词： Fluidization Simulation Sensitivity analysis Dense phase Drag

来源：

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

Sprayable nanodrug-loaded hydrogels with enzyme-catalyzed semiinter penetrating polymer network(Semi-IPN)for solar dermatitis

引用

Nano Research 2022年第7期15卷 6266-6277页

作者： Jialing Yao Junfeng hui Jing Yang Jiaxin Yao chaoquan hu Daidi Fan Shaanxi Key Laboratory of Degradable Biomedical Materials Shaanxi R&D Center of Biomaterials and Fermentation EngineeringSchool of Chemical EngineeringNorthwest UniversityXi’an 710069China Nanjing IPE Institute of Green Manufacturing Industry Nanjing 211100China Biotech.&Biomed.Research Institute Northwest UniversityXi’an 710069China

Solar dermatitis is an acute or chronic high incidence of skin injury caused by ultraviolet(UV)radiation based on strong sunlight,which seriously endangers people's *** this study,we designed and demonstrated enzyme-catalyzed semi-inter penetrating polymer network(Semi-IPN)sprayable nanodrug-loaded hydrogels based on gelatin,3-(4-hydroxyphenyl)propionic acid(HPA),polyvinyl alcohol(PVA),glycerol,and dexamethasone sodium phosphate(DEXP)for solar *** hydrogels had high water content,excellent biocompatibility,effective encapsulation and sustained release of nanodrugs,antiinflammatory,and strong anti-ultraviolet B(anti-UVB)radiation properties based on glycerol and phenol functional groups,but also controllable spray gelation mode to make them adhere well on the dynamic skin surfaces and achieve continuous transdermal drugs delivery for solar *** sprayable nanodrug-loaded hydrogel systems could be used as a highly effective therapeutic method for solar dermatitis,and also provide a good strategy for designing novel nanodrug-loaded hydrogel delivery systems.

关键词： enzyme-catalyzed semi-inter penetrating polymer network(Semi-IPN) sprayable hydrogel nanodrug-loaded solar dermatitis

来源：

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

Ce and Se co-doped MBG/SA/HLC microgel bone powder for repairing tumor bone defects

引用

Nano Research 2023年第1期16卷 746-756页

作者： Miaolin Fan Wan Liu Cuiying Fan Xiaoyan Zheng Junfeng hui chaoquan hu Daidi Fan Shaanxi Key Laboratory of Degradable Biomedical Materials Shaanxi R&D Center of Biomaterials and Fermentation EngineeringSchool of Chemical EngineeringNorthwest UniversityXi’an 710069China Biotech.&Biomed.Research Institute Northwest UniversityXi’an 710069China Xi’an Giant Biogene Technology Co. Ltd.Xi’an 710069China Nanjing IPE Institute of Green Manufacturing Industry Nanjing 211100China

The repair and treatment of tumor bone defects is a difficult problem to solve urgently in clinical *** tumor resection,patients are not only faced with a large area of bone defect,but also may have the risk of tumor recurrence,which can easily cause huge physical and mental harm to *** this study,we successfully designed and constructed an organic/inorganic composite microgel bone powder(S-H-M3%Ce/3%Se)based on cerium(Ce)and selenium(Se)elements co-doped mesoporous bioactive glass(M3%Ce/3%Se),sodium alginate(SA),and recombinant human-like collagen(HLC).The obtained S-H-M3%Ce/3%Se could inhibit the growth of osteoma cells and promote the growth of normal cells,and effectively promote the repair of defect *** integration of the“treatment and repair”organic/inorganic composite microgel bone powder provided a new strategy for the treatment of cancerous bone defects.

关键词： mesoporous bioactive glass functional elements osteoma inhibition bone repair

来源：

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

Efficient fluidization intensification process to fabricate in-situ dispersed(SiO+G)/CNTs composites for high-performance lithium-ion battery anode applications

引用

Particuology 2021年第3期19卷 84-90页

作者： Hebang Shi He Zhang chaoquan hu Shaofu Li Maoqiao Xiang Pengpeng Lv Qingshan Zhu State key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Science Beijing 100049China College of Materials and Metallurgy Guizhou UniversityGuiyang 550025China Nanjing IPE Institute of Green Manufacturing Industry Nanjing 211135China

An efficient fluidization process intensification method was proposed to prepare carbon nanotube(CNT)-enhanced high-performance SiO anodes for lithium-ion *** introduction of graphite particles decreased bonding among SiO particles,inhibiting agglomerate growth and enhancing ***(SiO+G)/CNTs composites were synthesized by fluidized bed chemical vapor deposition with the CNTs grown in-situ,which ensured uniform dispersion and superior anchoring of the *** in-situ-grown CNTs and stacked graphite ensured excellent structural stability and *** synthesized(SiO+G)/CNTs delivered a stable reversible capacity of 466 mAh g^(−1) after 125 cycles and a capacity of∼200 mAh g^(−1) at 2 A g^(−1).The charging results indicated that the 3D network structure comprising CNTs and graphite not only effectively buffered the electrode expansion but also greatly improved mechanical flexibility.

关键词： Process intensification Fluidized bed chemical vapor deposition Carbon nanotubes Silicon suboxide anode

来源：

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

Three distinct optical-switching states in phase-change materials containing impurities:From physical origin to material design

引用

Journal of Materials Science & Technology 2021年第16期75卷 118-125页

作者： Chaobin Bi Kaicheng Xu chaoquan hu Ling Zhang Zhongbo Yang Shuaipeng Tao Weitao Zheng State Key Laboratory of Superhard Materials Key Laboratory of Automobile Materials of MOESchool of Materials Science and EngineeringJilin UniversityChangchun 130012China China-Japan Union Hospital of Jilin University Changchun 130033China State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China State Key Laboratory of Automotive Simulation and Control.Jilin University Changchun 130025China

Ge2 Sb2 Te5 is the most widely utilized chalcogenide phase-change material for non-volatile photonic applications,which undergoes amorphous-cubic and cubic-hexagonal phase transition under external ***,the cubic-hexagonal optical contrast is negligible,only the amorphous-cubic phase transition of Ge_(2)Sb_(2)Te_(5) is *** limits the optical switching states of traditional active displays and absorbers to *** find that increasing structural disorder difference of cubic-hexagonal can increase optical contrast close to the level of ***,an amorphous-cubichexagonal phase transition with high optical contrast is *** this phase transition,we have developed display and absorber with three distinct switching states,improving the switching performance by 50%.Through the combination of first-principle calculations and experiments,we reveal that the key to increasing structural disorder difference of amorphous,cubic and hexagonal phases is to introduce small interstitial impurities(like N)in Ge2 Sb2 Te5,rather than large substitutional impurities(like Ag)previously *** is explained by the formation energy and lattice *** on the impurity atomic radius,interstitial site radius and formation energy,C and B are also potential suitable *** addition,introducing interstitial impurities into phase-change materials with van der Waals gaps in stable phase such as GeSb_(4) Te_(7),GeSb_(2) Te_(4),Ge_(3)Sb_(2) Te_(6),Sb_(2)Te_(3) will produce high optical contrast amorphous-metastable-stable phase *** research not only reveals the important role of interstitial impurities in increasing the optical contrast between metastable-stable phases,but also proposes varieties of candidate matrices and *** provides new phase-change materials and design methods for non-volatile optical devices with multi-switching states.

关键词： Phase change materials Impurities Three states Structural disorder Photonic applications

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synthesis of TiCl_(2) powders through reactive gas phase infiltration in a fluidized bed reactor

引用

Particuology 2021年第4期19卷 95-103页

作者： Miao Song Yafeng Yang Hongdan Zhao Maoqiao Xiang Qingshan Zhu Jibin Jia chaoquan hu Fen Yue State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China Nanjing IPE Institute of Green Manufacturing Industry Nanjing 211135China

TiCl_(2) is a promising precursor for producing metallic titanium alloys and titanium-based ***,the effective synthesis of high-quality TiCl_(2) powder remains ***,a fluidized bed reactor(FBR)providing a high gas-solid contact area was employed to synthesize TiCl_(2) powder using a reliable TiCl_(4)-Ti reaction *** reaction conditions(600℃and 120 min)were determined for the proposed Ti-TiCl_(4) system by kinetic investigation.A dense Ti layer was regenerated upon the original surface of the Ti powder as a result of TiCl_(2) disproportionation at high temperature(above 700℃),which impeded infiltration by gaseous TiCl_(4).The particle size of the Ti reducing agent played a vital role in the production of TiCl_(2) powder.A mean particle size of 24.5μm was confirmed to be the most feasible option based on the optimal chlorinated depth(17μm).

关键词： Titanium dichloride Fluidization Kinetics Analysis

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：