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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

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Spongy acetylenic carbon material prepared by ball milling CaC2 and chlorinated rubber—Its mercury adsorption and electrochemical property

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Chinese Journal of Chemical Engineering 2019年第8期27卷 1988-1995页

作者： xuebing xu Wenfeng Li Luyan Xia Yingzhou Lu Hong Meng Chunxi Li State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China College of Chemical Engineering Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Energy Environmental Catalysis Beijing University of Chemical TechnologyBeijing 100029China

Design and preparation of novel advanced carbon materials with unique architecture and functional groups is of great ***,a spongy acetylenic carbon material(SACM) was prepared through mechanochemical reaction of CaC2 and chlorinated rubber in a planetary ball mill at ambient *** composition and structure were characterized,and its electrochemical properties and adsorption performance for Hg^2+ were *** SACM is composed of submicron spongy aggregates with high carbon content(81.8%) and specific area(503.9 m^2·g^-1),rich porosity and acetylenic *** SACM exhibits excellent adsorption for Hg2+with saturated adsorption amount being 157.1 mg·g^-1,which is superior to conventional carbon ***,it exhibits good electrochemical performance with low equivalent series resistance(0.50 Ω),excellent cycling stability and ideal double layer capacitive *** paper provides a novel and universal synthesis method of spongy carbon materials,and better results can be expected through tuning the pore structure,graphitization degree,and heteroatoms of the target carbon materials.

关键词： Acetylenic carbon material Calcium carbide Mechanochemical reaction Heavy metal adsorption

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Phosphatidylserine:An overview on functionality,processing techniques,patents,and prospects

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Grain & Oil Science and Technology 2023年第4期6卷 206-218页

作者： Jingnan Chen Jun Li Haoyu xu Jiaxi Li Yonghong Yuan xuebing xu Yanlan Bi College of Food Science and Engineering Henan University of TechnologyZhengzhou 450001China Wilmar(Shanghai)Biotechnology Research and Development Center Co. Ltd.Shanghai 200137China Enzymecode Biotechnology Co. Ltd.Binhai New DistrictTianjin 300457China

Phosphatidylserine(PS)is the part of cell structure in the body and has many beneficial functions especially in brain-related aging *** daily foods can provide PS to human body,the amount is very limited due to its poverty in most *** overcome the issue,numerous studies based on PS have been reported to develop PS-related *** this review,PS was comprehensively and critically reviewed from the view of resources,functions,processing techniques,patents,and *** resources,animal,plant,and microorganism origins were all covered with their differences in composition *** functions,benefits regarding memory,cognitive enhancement,exercise performance,reducing Alzheimer’s disease,and attention-deficit hyperactivity disorder symptoms were covered as well as the functional differences among animal-,plant-,and microorganism-based PS-related *** processing techniques,traditional extracting methods from animal,plant,and microorganism tissues were comparatively discussed with enzymatic synthesis based on different reaction ***,patents of PS-related supplements were evaluated as well as their *** review could provide scientific and valuable support for PS industry.

关键词： Phosphatidylserine Functionality Processing techniques Patents evaluation Prospects

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Generation,bonding and reactivity of transient zinc-substituted silylenes

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Science China Chemistry 2024年第4期67卷 1256-1262页

作者： Cheng xu Thayalan Rajeshkumar Laurent Maron xuebing Leng Yaofeng Chen State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China Spin-X Institute School of Chemistry and Chemical EngineeringState Key Laboratory of Luminescent Materials and DevicesGuangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional MaterialsSouth China University of TechnologyGuangzhou 510641China LPCNO CNRS&INSAUniversitéPaul SabatierToulous 31077France

The metal-substituted silylenes are of high interest,as the theoretical studies indicated that the silylenes with electropositive substituents have a small ΔE_(S-T)(singlet-triplet energy gap)or even the ground-state ***,such compounds are highly unstable,and only two transient alkali metal-substituted silylenes M(^(t)Bu_(3)Si)Si:(M=Li,K)were generated by photoextrusion of the alkali metal-substituted silacyclopropenes and merely studied by spectroscopic method(EPR)at low temperature(14 to 50 K).Herein,we report the generation of transient zinc-substituted silylenes from zinc silacyclopropanyl complexes under very mild and convenient *** generated transient zinc-substituted silylenes are highly reactive and undergo intermolecular cycloaddition with alkenes for the synthesis of zinc-substituted Si-heterocyclic *** there is no substrate,the zinc-substituted silylenes attack the C-C bonds of the β-diketiminato ligands and break the C-C *** studies further highlight the silylene nature of the zinc-substituted silylene and a very small ΔE_(S-T)(4.4 kcal/mol).

关键词： zinc complex silylene C-C bond cleavage cycloaddition DFT calculations

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Enzymatic preparation of mono-and diacylglycerols:A review

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Grain & Oil Science and Technology 2023年第4期6卷 185-205页

作者： Jiawei Zheng Yudong Liang Jiaxi Li Shuping Lin Qiangyue Zhang Kanghua Zuo Nanjing Zhong xuebing xu School of Food Science Guangdong Pharmaceutical UniversityZhongshan 528458China College of Food Science and Technology Henan University of TechnologyZhengzhou 450001China Wilmar(Shanghai)Biotechnology Research and Development Center Ltd. Pudong New DistrictShanghai 200137China

Monoacylglycerols(MAGs) and diacylglycerols(DAGs) are partial glycerides widely used in food industry. They are safe and non-toxic food emulsifiers, especially for MAGs. MAGs account for approximately 75% of the total emulsifiers in food industry worldwide. DAGs are recognized as functional cooking oils, they can suppress body fat accumulation and postprandial serum triacylglycerols(TAGs) level. The traditional production of MAGs and DAGs is based on the chemical method, which requires high reaction temperature usually up to 200–260 ℃. Such high temperature is not suitable for oil containing heat sensitive polyunsaturated fatty acids. Enzymatic approach has been received increasing attentions. Enzymatic production of partial glycerides to replace chemical processes has been in industry, particularly for DAGs production as the products have been claimed as a functional and nutritional oil. Enzyme technology for the processing of oils and fats has been moved to industry step by step and case by case during the last 20 years. More and more applications are particularly moving into bulky oils and fats processing. At the same time, the cost of enzymes as a commercial product is reducing steadily. This review summarized the recent 15 years advances on the the enzymatic preparation of MAGs and DAGs. The critical process parameters under different reaction routes were presented and emphasized. The reaction media not only increased the homogeneity of the reaction system, but also shifted the reaction equilibrium towards the target product generation, and this part was stated in detail. In addition, the patent evaluation was included, and the application of MAGs and DAGs was covered.

关键词： Monoacylglycerol Diacylglycerol Enzymatic production Esterification Glycerolysis Tert-butanol Ionic liquids Patent evaluation

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精神分裂症患者的负性生活事件与复发:社会支持的调节作用

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宁夏医科大学学报 2024年第5期46卷 521-527页

作者：刘静静朱晓丹王青陈兵徐学兵刘娟宁夏医科大学银川750004 宁夏宁安医院银川750011 宁夏医科大学总医院宁夏医科大学第一临床医学院银川750004

目的探讨精神分裂症患者负性生活事件、复发与社会支持之间的关系,以及社会支持在负性生活事件与复发之间的调节作用。方法采用便利抽样法,抽取宁夏精神卫生中心门诊就诊的215例精神分裂症患者。采用社会再适应评定量表(SRRS)、社会支... 详细信息

目的探讨精神分裂症患者负性生活事件、复发与社会支持之间的关系,以及社会支持在负性生活事件与复发之间的调节作用。方法采用便利抽样法,抽取宁夏精神卫生中心门诊就诊的215例精神分裂症患者。采用社会再适应评定量表(SRRS)、社会支持评定量表(SSRS)、简明精神病评定量表(BPRS)、临床总体印象-严重程度量表(CGI-S)、Morisky药物依从性量表-8(MMAS-8)分别对负性生活事件、社会支持、复发、疾病严重程度和药物依从性进行测量。采用Spearman相关分析探讨负性生活事件、复发和社会支持之间的相关性,采用二元Logistic回归分析探讨一般资料、负性生活事件、社会支持对复发的影响,采用SPSS PROCESS 3.4探讨社会支持对负性生活事件与复发的调节作用。结果负性生活事件与复发呈正相关(P<0.01),主观社会支持、客观社会支持和社会支持均与复发呈负相关(P均<0.05)。主观社会支持在负性生活事件和复发之间的调节作用显著(P<0.01)。结论负性生活事件和社会支持均与精神分裂症复发密切相关,主观社会支持在负性生活事件和复发之间起到调节作用。

关键词：精神分裂症负性生活事件复发社会支持调节作用

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Lipase-Catalyzed Synthesis of Sn-2 Palmitate: A Review

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Engineering 2020年第4期6卷 406-414页

作者： Wei Wei Cong Sun Xiaosan Wang Qingzhe Jin xuebing xu Casimir CAkoh Xingguo Wang International Joint Research Laboratory for Lipid Nutrition and Safety Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu ProvinceSchool of Food Science and TechnologyJiangnan UniversityWuxi 214122China Beijing Advanced Innovation Center for Food Nutrition and Human Health Beijing Technology and Business University(BTBU)Beijing 100048China College of Food Science and Technology Henan University of TechnologyZhengzhou 450001China Wilmar(Shanghai)Biotechnology Research and Development Center Co. Ltd.Shanghai 200137China Department of Food Science and Technology The University of GeorgiaAthensGA 30602USA

Human milk fat(HMF)is an important source of nutrients and energy for ***(TAGs)account for about 98%of HMF and have a unique molecular *** is highly enriched in palmitic acid(PA)at the sn-2 position of the glycerol backbone(more than 70%)and in unsaturated fatty acids at the sn-1,3 *** specific TAG structure in HMF plays a valuable function in infant ***-2 palmitate(mainly 1,3-dioleoyl-2-palmitoyl-glycerol)is one of the structured TAGs that is commonly supplemented into infant formula in order to enable it to present a similar structure to *** this review,the development of the lipase-catalyzed synthesis of sn-2 palmitate over the last 25 years are summarized,with a focus on reaction schemes in a laboratory *** attention is also paid to the commercialized sn-1,3 regioselective lipases that are used in structured TAGs synthesis,to general methods of TAG analysis,and to successfully developed sn-2 palmitate products on the *** for the lipase-catalyzed synthesis of sn-2 palmitate are discussed.

关键词： Structured triacylglycerols Palmitic acid Human milk fat substitutes Lipase-catalyzed reaction Sn-2 palmitate Quantitative analysis

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心血管手术麻醉住培教学的实践与思考

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中国继续医学教育 2024年第5期16卷 154-158页

作者：王薇黄志勇方能新陈友伟许学兵曾冰高琪李立环中国医学科学院阜外医院深圳医院麻醉科广东深圳518000 香港大学深圳医院麻醉科广东深圳518000

心血管手术的麻醉既要求深厚的理论基础,又强调丰富的实践经验与广泛的应用能力,同时,它也是一个极具风险的临床技术领域,麻醉管理的关注点与非心脏手术明显不同,麻醉相关操作较普通麻醉复杂,在麻醉学领域中占有特殊位置。中国医学科学... 详细信息

心血管手术的麻醉既要求深厚的理论基础,又强调丰富的实践经验与广泛的应用能力,同时,它也是一个极具风险的临床技术领域,麻醉管理的关注点与非心脏手术明显不同,麻醉相关操作较普通麻醉复杂,在麻醉学领域中占有特殊位置。中国医学科学院阜外医院深圳医院是全国心血管专科三甲医院,隶属于国家心血管中心,也是香港大学深圳医院住院医师规范化培训的教学协同基地,负责对住培医生进行为期两个月的心血管麻醉培训与带教。住培医生对心血管手术麻醉接触少,理论知识与临床经验均缺乏,帮助住培医生在2个月的学习时间内熟悉心血管麻醉理论、流程,提升实践操作水平是具有挑战性的,同时也对住培带教提出了更高的要求。文章将近年来在心血管麻醉专业和临床工作中的带教体会进行分析,对教学模式,食道超声技能培训、微信平台教学等方面进行总结,并对心血管专科培训进行展望,促进住培医生心血管麻醉综合能力的提升,进一步促进心血管麻醉的发展和进步。

关键词：心血管手术麻醉住院医师规范化培训教学模式食道超声微信平台专科医师规范化培训

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Flexible bidirectional pulse charging regulation achieving long-life lithium-ion batteries

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Journal of Energy Chemistry 2024年第9期96卷 59-71页

作者： Xiaodong xu Shengjin Tang xuebing Han Languang Lu Yudi Qin Jiuyu Du Yu Wu Yalun Li Chuanqiang Yu Xiaoyan Sun xuning Feng Minggao Ouyang Rocket Force University of Engineering Xi’an 710025ShaanxiChina State Key Laboratory of Intelligent Green Vehicle and Mobility School of Vehicle and MobilityTsinghua UniversityBeijing 100084China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China

Typical application scenarios,such as vehicle to grid(V2G)and frequency regulation,have imposed significant long-life demands on lithium-ion ***,we propose an advanced battery life-extension method employing bidirectional pulse charging(BPC)*** traditional constant current charging methods,BPC strategy not only achieves comparable charging speeds but also facilitates V2G frequency regulation *** significantly enhances battery cycle ampere-hour throughput and demonstrates remarkable life extension *** this interesting conclusion,adopting model identification and postmortem characterization to reveal the life regulation mechanism of BPC:it mitigates battery capacity loss attributed to loss of lithium-ion inventory(LLI)in graphite anodes by intermittently regulating the overall battery voltage and anode potential using a negative charging ***,from the perspective of internal side reaction,the life extension mechanism is further revealed as inhibition of solid electrolyte interphase(SEI)and lithium dendrite growth by regulating voltage with a bidirectional pulse current,and a semi-empirical life degradation model combining SEI and lithium dendrite growth is developed for BPC scenarios health management,the model parameters are identified by genetic algorithm with the life simulation exhibiting an accuracy exceeding 99%.This finding indicates that under typical rate conditions,adaptable BPC strategies can extend the service life of LFP battery by approximately 123%.Consequently,the developed advanced BPC strategy offers innovative perspectives and insights for the development of long-life battery applications in the future.

关键词： Lithium-ion battery Long-life regulation Bidirectional pulse charging Mechanism identification

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酶促生产结构化脂质(英文)

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食品科学 2000年第12期21卷 195-198页

作者：徐学兵丹麦技术大学生物技术系

结构化脂质系指具有特定功能的并且是用人工方法生产的三酰基甘油，这种三酰基甘油含有附着在甘油主链上的多种短链、中链和长链脂肪酸。根据与三酰基甘油的甘油主链酰化的各种脂肪酸的链的长度，结构化脂质主要分为MLM型、SLS型、LML型... 详细信息

结构化脂质系指具有特定功能的并且是用人工方法生产的三酰基甘油，这种三酰基甘油含有附着在甘油主链上的多种短链、中链和长链脂肪酸。根据与三酰基甘油的甘油主链酰化的各种脂肪酸的链的长度，结构化脂质主要分为MLM型、SLS型、LML型、MLS型等类型。L代表长链脂肪酸（≥C14）M代表中链脂肪酸（C8-C10），S代表短链脂肪酸（≤C6）。胰和胃的脂酶多半在三酰基甘油的sn-1和sn-3位置上有酯键，而且与长链脂肪酸相比，尤其是与长链多不饱和脂肪酸相比，在靠近短链和中链脂肪酸处，胰和胃的脂酶显出更高的活性。因此，膳食中的三酰基甘油被脂酶水解为肠道中的sn-2单酰基甘油和脂肪酸。水解产物被人体吸收，并在肠道的粘膜细胞中转化成新的三酰基甘油。这样，如果膳食中的油脂是MLM或SLS型三酰基甘油，那么位于sn-2处的长链多不饱和脂肪酸就可以提供sn-2单酰基甘油，这是粘膜细胞中三酰基甘油合成的起始物质。Sn-1和sn-3处的短链或中链脂肪酸，被门静脉吸收并且快速在肝脏中氧化成能源以取代葡萄糖。在sn-1和sn-3两处都含有短链或中链脂肪酸，并且在sn-2处含有长链脂肪酸的各种型号的结构化脂质可以有效地提供易于人体吸收的各种脂肪酸，作为营养素、功能性类脂物和药物，治疗特殊的疾病及代谢病症。

关键词：结构化脂质甘油酶促生产脂肪酸

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