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Ceria supported platinum catalyst for CO oxidation reaction:Importance of metallic active species——Commemorating the 100th anniversary of the birth of Academician Guangxian Xu

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Journal of Rare Earths 2021年第5期39卷 495-503页

作者： luozhen jiang Xin Tao Li'na Li Wen Xia Rui Si Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201204China University of Chinese Academy of Sciences Beijing 100049China Division of China TILON Group Technology LimitedShanghai 200090China

Ceria supported platinum catalyst has now been widely studied due to its excellent activity for CO oxidatio ***,the electron state of active metal center is still an open *** this work,a ce ria nanorod support was prepared and platinum(Pt)with 0.9 at%was deposited using an impregnation method to obtain Pt/CeO_(2)*** the help of"light-off"experiment and temperatureprogrammed reduction under CO(CO-TPR)test,the conclusion is proposed that the process of hydrogen reduction can enhance the activity of CO oxidation reaction for the generation of optimal active Pt *** innovative near-situ X-ray absorption fine structure(XAFS)technique was used to investigate the chemical state of central Pt atom during the reaction process,clearly demonstrating that the high oxidized state of Pt does harm to the activity for CO oxidation while the relatively reductive Pt exhibits high activity,and the different oxidized state and chemical environment of Pt during every process has been ***,the activity of our Pt/CeO_(2)catalyst is superior to that of most of the previous reports about CO catalytic oxidation by Pt based ***,the optimal active species(Pt-O_(4))have been identified after hydrogen reduction,which could be a possible key strategy to control the oxidation of Pt.

关键词： Platinum catalyst Ceria support CO oxidation Structure-activity relationship X-ray absorption fine structure Rare earths

Polyoxometalate as the assembly material to self-assembled Ni(OH)_(2) nanosheets with electrocatalytic performance

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Nano Research 2024年第8期17卷 7061-7067页

作者： Danyang He Tianyang Li luozhen jiang Fei Wang Zihao Xing Nan Wang Zhiyu Jia Guo-Yu Yang Key Laboratory of Cluster Science Ministry of EducationSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China Shanghai Advanced Research Institute Chinese Academy of ScienceShanghai 201210China Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Facluty of ChemistryNortheast Normal UniversityChangchun 130024China

Developing non-noble metal-based electrocatalyst with high catalytic activity is essential for advancing hydrogen energy *** study introduces a hydrothermal method for synthesizing order Ni(OH)_(2) nanosheets,with H_(3)O_(40)PW_(12)(denoted as PW_(12))loaded onto reduced graphene oxide(rGO)coated on nickel foam(referred to as PW_(12)-Ni(OH)_(2)/rGO).This method contrasts with the electrodeposition of Ni(OH)_(2),where PW_(12) is added to the synthetic system to direct the assembly and morphology of the Ni(OH)_(2) through a hydrothermal *** this work,the nickel foam acts dual roles as both the substrate and the source of nickel for the formation of Ni(OH)_(2).The PW_(12)-Ni(OH)_(2)/rGO nanosheets,when successfully prepared and loaded onto the nickel foam(NF),exhibited superior electrocatalytic activity for the hydrogen evolution reaction(HER)in an alkaline electrolyte,achieving a current density of 10 mA·cm^(-2) at an overpotential of 69 ***,we endeavored to expand the application of this material towards the oxygen evolution reaction(OER)by preparing PW_(12)-(Fe/Co)Ni(OH)_(2)/rGO through the addition of metal *** nanocomposite displayed outstanding electrocatalytic activity in alkaline electrolytes,with a current density of 10 mA·cm^(-2)at an overpotential of 211 mV,and demonstrated excellent stability over a 50 h period in a 1 M KOH *** results presented in this paper offer an effective strategy for the preparation of polyoxometalate-based inorganic materials with diverse functionalities,applicable to both HER and OER.

关键词： polyoxometalate Ni(OH)_(2) assembly hydrogen evolution reaction oxygen evolution reaction

Engineering Pt heterogeneous catalysts for accelerated liquid–solid redox conversion in Li-S batteries

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Journal of Energy Chemistry 2022年第6期31卷 490-496,I0014页

作者： Qinhua Gu Yujie Qi Wuxing Hua Tongxin Shang Junnan Chen luozhen jiang Lina Li Ming Lu Yixiao Zhang Xi Liu Ying Wan Bingsen Zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016LiaoningChina Key Laboratory of Preparation and Application of Environmental Friendly Materials of the Ministry of Education The Joint Laboratory of MXene MaterialsKey Laboratory of Functional Materials Physics and Chemistry of the Ministry of EducationJilin Normal UniversityChangchun 130103JilinChina Nanoyang Group State Key Laboratory of Chemical Engineering School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Key Laboratory of Resource Chemistry of Ministry of Education Shanghai Key Laboratory of Rare Earth Functional Materialsand Department of ChemistryShanghai Normal UniversityShanghai 200234China School of Chemistry and Chemical Engineering In-situ Center for Physical ScienceShanghai Jiao Tong UniversityShanghai 200240China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China

The shuttle effect caused by soluble lithium polysulfides (LiPSs) deteriorates multiphase transformation reaction kinetics of sulfur species,and gives rise to an unserviceable lithium-sulfur (Li-S) ***,as a process optimization approach,offers an option to eliminate the intrinsic ***,exploring and understanding the role of catalysts on electrode reaction remains critical bottlenecks,particularly as they are prone to continuous evolution under complex dynamic ***,platinum nanoparticles loaded on MXene nanosheets,as sulfur host,and the action of catalysts on the reaction process are investigated via ex-situ monitors upon solid–liquid–solid chemical transformation of sulfur *** traces confirm that the high performance originates from electron transfer between catalysts and LiPSs,which lowers the nucleation barrier from liquid LiPSs to solid Li_(2)S/Li_(2)S_(2).Further,the accelerated liquid–solid conversion can alleviate the accumulation of LiPSs,and boost the reaction kinetics in Li-S *** findings corroborate the electronic modulation between catalysts and LiPSs,which is a generalizable strategy to optimize energy conversion efficiency of Li-S batteries.

关键词： Lithium-sulfur batteries MXene Catalysis Shuttle effect Pt

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有关非起爆药雷管的几个技术问题

火工品 1999年第1期 48-51页

作者：胡学先谢兴华蒋罗珍淮南工业学院

以非起爆药雷管的现状为基础，探讨了非起爆药雷管的关键技术和实现雷管无起爆药的技术途径，提出了应加强性能鉴定等技术问题。

关键词：雷管非起爆药雷管燃烧转爆轰

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新颖的掺铒光纤放大器无源复合组件的研究

中国激光 1997年第8期24卷 741-744页

作者：刘水华虞国华方罗珍江山武汉邮电科学研究院固体器件研究所华中理工大学光电子工程系

报道了一种将光波分复用器与光隔离器集于一体的适用于掺铒光纤放大器的新颖复合组件。根据复合组件的性能指标对组件的结构参数进行了优化设计。实际制作的复合组件，得到泵浦光插入损耗＜０．６ｄＢ，信号光的插入损耗＜１．５ｄＢ，... 详细信息

报道了一种将光波分复用器与光隔离器集于一体的适用于掺铒光纤放大器的新颖复合组件。根据复合组件的性能指标对组件的结构参数进行了优化设计。实际制作的复合组件，得到泵浦光插入损耗＜０．６ｄＢ，信号光的插入损耗＜１．５ｄＢ，反向隔离度＞４２ｄＢ，体积为９×４５ｍｍ３。将复合组件用于掺铒光纤放大器中（前向泵浦方式）得到约３０ｄＢ的小信号增益，１０ｄＢｍ的饱和输出功率。

关键词：掺铒光纤放大器光隔离器无源复合组件

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光纤光栅布拉格波长温度稳定性研究

通信学报 1999年第S1期20卷 352-357页

作者：阮迎澜付浩军刘永红江山刘水华方罗珍武汉邮电科学研究院固体器件研究所 430074 华中理工大学光电子工程系 430074

本文对降低长短两种周期光纤光栅布拉格波长的温度稳定性作了理论分析,并对短周期光纤光栅进行温度补偿实验研究。结果表明补偿后光纤光栅的布拉格中心波长在—20℃～80℃的温度范围内变化率为0.0028nm/℃,其温度灵敏性降低到补偿前的约... 详细信息

本文对降低长短两种周期光纤光栅布拉格波长的温度稳定性作了理论分析,并对短周期光纤光栅进行温度补偿实验研究。结果表明补偿后光纤光栅的布拉格中心波长在—20℃～80℃的温度范围内变化率为0.0028nm/℃,其温度灵敏性降低到补偿前的约5分之一。

关键词：光纤光栅布拉格波长温度补偿

15份黑、紫色小麦种质资源的遗传差异及籽粒花青素含量

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河南农业科学 2022年第12期51卷 28-36页

作者：杨丽娟付亮任星旭朱坤蒋志凯河南省新乡市农业科学院/河南省强筋小麦繁育工程技术研究中心河南新乡453000

采用15K SNP芯片数据分析了15份黑、紫色小麦种质资源的遗传差异,利用HPLC法对15份小麦种质资源籽粒中的6种花青素含量进行测定,为黑、紫色小麦杂交育种亲本选择提供理论依据。结果表明,通过SNP芯片数据分析共获得7 116个有效SNP(单核... 详细信息

采用15K SNP芯片数据分析了15份黑、紫色小麦种质资源的遗传差异,利用HPLC法对15份小麦种质资源籽粒中的6种花青素含量进行测定,为黑、紫色小麦杂交育种亲本选择提供理论依据。结果表明,通过SNP芯片数据分析共获得7 116个有效SNP(单核苷酸多态性)位点,SNP多态性比率为77.12%,每条染色体上有128~682个SNP位点,在A、B、D染色体组中不均匀分布。各染色体组中SNP标记的数量表现为B>A>D,其中,3B染色体上SNP位点最多,4D染色体上SNP位点最少。黑、紫色小麦种质资源籽粒中总花青素含量均显著高于普通小麦,不同种质资源籽粒中花青素含量差异很大。紫色小麦、卫辉黑小麦和周黑麦1号籽粒中花青素种类丰富而且总含量高于其他种质资源。蜀紫麦1801、特色小麦1、特色小麦2、漯珍1号、豫州黑麦1号和豫州黑麦2号籽粒中总花青素含量较低。15份黑、紫色小麦种质资源可分为Ⅰ、Ⅱ、Ⅲ3类,3类种质资源籽粒中花青素含量差异很大,表现为Ⅱ>Ⅲ>Ⅰ,而且遗传差异大的种质资源间花青素含量差异大。综上,紫色小麦、卫辉黑小麦和周黑麦1号总花青素含量高,可与遗传相似度低的其他材料进行杂交育种亲本组配。

关键词：黑色小麦紫色小麦 SNP 遗传差异花青素

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彩麦麸皮花色苷的稳定性研究

食品工业 2016年第4期37卷 30-34页

作者：谷玉娟苏东民苏东海时玉晴陈志成林江涛河南工业大学郑州450001 郑州铁路职业技术学院郑州450002 北京电子科技职业学院北京100176

探究了彩麦麸皮花色苷在外界条件下的稳定性,为彩麦麸皮花色苷的加工应用提供理论参考,并加快相关产品的研究与开发。选取河南彩色小麦中普黑麦1号和漯珍6号蓝麦为原材料,利用紫外可见分光光度法研究了pH、温度、金属离子及VC等几种添... 详细信息

探究了彩麦麸皮花色苷在外界条件下的稳定性,为彩麦麸皮花色苷的加工应用提供理论参考,并加快相关产品的研究与开发。选取河南彩色小麦中普黑麦1号和漯珍6号蓝麦为原材料,利用紫外可见分光光度法研究了pH、温度、金属离子及VC等几种添加剂对彩麦麸皮花色苷的影响作用。结果表明:彩麦麸皮花色苷在偏酸性和低温(≤65℃)条件下较稳定。离子浓度为2.0 mmol/L时,K^+、Na^+和Ca^(2+)的加入增强了花色苷的稳定性;Fe^(3+)、Cu^(2+)、VC及一定浓度的柠檬酸(≥0.5%)和蔗糖(≥5%)的加入则使花色苷稳定性下降;2%或3%的食盐可显著提高其稳定性。故彩麦麸皮花色苷的稳定性受pH和温度的影响较大,不同的金属离子和添加剂对其稳定性影响不同。

关键词：彩色小麦麸皮花色苷稳定性