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Metal/antiperovskite metal nitride composites Ag/AgNNi_(3)as novel efficient electrocatalysts for hydrogen evolution reaction in alkaline media

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Journal of Materials Science & Technology 2022年第17期112卷 222-229页

作者： Lili Zhu Bingbing Yang Ziqiang Wu Changdian Li Han Li Hui Li Yanan Huang Xiaoguang Zhu xuebin Zhu Yuping Sun Key Laboratory of Materials Physics Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China University of Science and Technology of china Hefei 230026China High Magnetic Field Laboratory HFIPSChinese Academy of SciencesHefei 230031China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

Searching for effective hydrogen evolution reaction(HER)electrocatalysts is crucial for water *** metal nitrides(TMNs)are very attractive potential candidates since of high electrical conductivity,robust stability,element rich and high *** metal nitrides provide chemical flexibility since two different types of transition metal elements are contained,allowing partial substitution both for A-and ***,we report a novel antiperovskite metal nitride Ag_(x)Ni_(1-x)NNi_(3)(0≤x≤0.80)thin film used as highly effective HER *** phase antiperovskite nitride can be successfully obtained for Ag_(x)Ni_(1-x)NNi_(3)with x less than *** Ag_(0.76)Ni_(0.24)NNi_(3) towards HER shows an overpotential of 122 mV at 10 mA cm^(-2)in alkaline ***,considering the role of Ag for adsorbing hydroxyl groups,chemical engineering has been carried out for designing metal/antiperovskite nitride Ag/Ag_(x)Ni_(1-x)NNi_(3)composite *** 0.18 Ag/Ag_(0.80)Ni_(0.20)NNi_(3)electrocatalyst shows a mere 13 and 81 mV of overpotential to reach 1 and 10 mA cm^(-2),respectively,showing high durability in alkaline *** results will provide a novel type of HER catalysts based on antiperovskite metal nitrides and a strategic design for metal/antiperovskite metal nitride composite electrocatalysts for HER in alkaline media.

关键词： Hydrogen evolution reaction Antiperovskite Metal nitride Composite catalyst

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Niobium fluoride-modified hydrogen evolution reaction of magnesium borohydride diammoniate

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Journal of Materials Science & Technology 2023年第25期156卷 197-205页

作者： Yujie Lv Bao Zhang Haixiang Huang Bogu Liu Wei Lv Jianguang Yuan Guanglin Xia xuebin Yu Dalin Sun Ying Wu School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijing102206China institute of Energy Power Innovation North China Electric Power UniversityBeijing102206China Jiangsu JITRI Advanced Energy & Materials Research institute Co. Ltd.Changzhou213000China Department of Materials Science Fudan UniversityShanghai200433China

Metal borohydride ammoniates have become one of the most promising hydrogen storage materials due to their ultrahigh ***,their application is still restricted by the high temperature of hydrogen desorption and the release of ***,to promote the dehydrogenation evolution and suppress the ammonia release,different amounts of NbF 5 were introduced into Mg(BH4)2·*** to the pure Mg(BH_(4))_(2)·2NH_(3),the Mg(BH_(4))_(2)·2NH_(3)-NbF_(5) composites exhibit lower onset dehydriding temperatures(53–57℃)and higher dehydriding capacities(5.6 wt.%–8.2 wt.%)at below 200℃,with the complete suppression of *** addition,7.4 wt.%H_(2) could be released from Mg(BH_(4))_(2)·2NH_(3)–5 mol%NbF5 composite at 200℃ within 20 min and the apparent activation energy is calculated to be 60.28 kJ mol^(-1),which is much lower than that of pure Mg(BH_(4))_(2)·2NH_(3)(92.04 kJ mol^(-1)).Mg(BH_(4))_(2)·2NH_(3) should mechanochemically react with NbF5,forming dual-metal(Mg,Nb)borohydride ammoniate and spherical *** introduction of electronegative Nb cation results in-situ formation of(Mg,Nb)borohydride ammoniate towards a lower dehydrogenation temperature and a higher hydrogen release *** increased phase boundaries among the Mg(BH_(4))_(2)·2NH_(3),dual-metal(Mg,Nb)borohydride ammoniate,and MgF2 phases further facilitate the hydrogen diffusion during the dehydrogenation of the composites.

关键词： Hydrogen storage Magnesium borohydride Ammoniates NbF5 Catalysis

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Characteristics of the vertical structure of the atmospheric turbulence in the Tibetan Plateau

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Science china Earth Sciences 2022年第7期65卷 1368-1378页

作者： Kun ZHANG Yang WU Feifei WANG xuebin LI Shengcheng CUI Zihan ZHANG Xiaoqing WU Ningquan WENG Tao LUO Yinbo HUANG School of Environmental Science and Optoeclectronic Technology University of Science and Technology of ChinaHefei 230026China Key Laboratory of Atmospheric Optics Anhui Institute of Optics and Fine Mechanics(AIOFM)Chinese Academy of SciencesHefei 230031China Science Island Branch of Graduate School University of Science and Technology of ChinaHefei 230026China Advanced Laser Technology Laboratory of Anhui Province Hefei 230037China

The Tibetan Plateau(TP)has unique atmospheric dynamics and thermal structures that originate from its giant terrain and complex *** vertical-resolution thermal radiosondes were launched near the central(Lhasa,91°06′E,29°36′N,3670 m above sea level(ASL))and marginal(Da Qaidam,95°21′E,37°51′N,3180 m ASL)areas of the TP during the summers of 2018 and 2020,*** turbulence parameters were calculated,and the characteristics of the atmospheric turbulent vertical structure at sunset in these two areas were analyzed and *** by TP thermal forcing and stably controlled by the summer monsoon anticyclone,the atmospheric refractive index structure constant(C_(n)^(2))tended to increase and then decrease with increasing height,reaching a maximum at the tropopause(~18 km ASL)at the Lhasa *** C_(n)^(2) at the Da Qaidam site also tended to increase at the tropopause,the position of the strong turbulent band(STB)(5–7 km ASL)was below the tropopause height corresponding to the potential temperature lapse rate *** vertical distribution of C_(n)^(2) at the two sites,particularly regarding the position of the STB,was highly correlated with the atmospheric stability(Ri)and the thermal mixing scale(L_(T)).The significant correlations among the three parameters(STB,Ri,and L_(T))indicated that the strong fluctuations in temperature caused by thermal mixing were the dominant factor causing the Ri to be less than its critical value of ***,the suppression strength involving the upward transport of the heat sources was the main reason for the different turbulent vertical structures and STB positions at the two *** zonal mean thermodynamic and dynamical fields derived from the reanalysis data also showed a height difference in the heat sources transported to the troposphere at the two *** the marginal TP,the material and energy in the lower troposphere were transported by the turbulent atmosphere upward along the slop

关键词： Tibetan Plateau Strong turbulent band Thermal forcing Stratosphere-troposphere exchange Tropopause

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Effects of Bacillus subtilis and Saccharomyces cerevisiae inoculation on soil bacterial community and rice yield under combined irrigation with reclaimed and fresh water

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International Journal of Agricultural and Biological Engineering 2022年第3期15卷 33-46页

作者： Hongfei Lu xuebin Qi Ping Li Dongmei Qiao Shafeeq-ur-Rahman Fangfang Bai Jiaxin Cui Farmland Irrigation Research institute Chinese Academy of Agricultural SciencesXinxiang 453003HenanChina Water Environment Factor Risk Assessment Laboratory of Agricultural Products Quality and Safety Ministry of Agriculture and Rural AffairsXinxiang 453002HenanChina Agricultural Water Soil Environmental Field Research Station of Xinxiang Chinese Academy of Agricultural SciencesXinxiang 453002HenanChina Jiangsu Vocational College of Agriculture and Forestry Jurong 212499JiangsuChina

In order to save fresh water and reduce soil salt accumulation,reclaimed water-fresh water combined irrigation,i.e,irrigation with reclaimed water for 50 d and then with fresh water till harvest,was used in rice *** subtilis and Saccharomyces cerevisiae were inoculated into the soil at the end of reclaimed water *** inoculation weight per pot of these microorganisms was as follows:0 g and 0 g(J0),5 g and 0 g(J1),3.75 g and 1.25 g(J2),2.5 g and 2.5 g(J3),1.25 g and 3.75 g(J4),and 0 g and 5 g(J5),*** using reclaimed water in the whole stage was used as the control(CK).The plant height,tiller,physical and chemical properties of the soil,and soil bacterial diversity were *** was found that the plant height of rice was increased significantly by J1-J5 *** dry weight of rice root,stem,and panicle and the 1000-grain weight increased significantly,while the leaf dry weight *** inoculation significantly increased the nutrient absorption capacity of the crops.J1,J2,and J4 treatments significantly increased the amount of nitrate-nitrogen,ammonium nitrogen,available phosphorus,and available potassium,while J3,J4,and J5 treatments increased the soil organic matter,and microbial inoculation significantly decreased the EC of soil.J4 treatment induced the largest reduction in EC,and microorganisms treatments increased soil *** function prediction based on the KEGG(Kyoto Encyclopedia of Genes and Genomes)pathway indicated that soil metabolic function was not significantly disturbed by the *** matter and pH are the two main factors affecting the structure of the bacterial community in soil.3.75 g of *** and 1.25 g of *** per pot is the best inoculation ratio.

关键词： Bacillus subtilis Saccharomyces cerevisiae rice reclaimed water soil

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地电场对青藏高原东北部季节冻土的响应特性

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冰川冻土 2017年第4期39卷 824-833页

作者：章鑫杜学彬王丽中国地震局兰州地震研究所甘肃兰州730000 广东省地震局广东广州510070 江苏省地震局南京基准地震台江苏南京210014

地电场的变化与台址环境的水文、气象及地质背景等相关,在青藏高原东北部季节冻土区,11个地电场台站处于较高的海拔,据台址下覆场地属性分为A类(黄土型)和B类(高原草场型)台站。通过对青藏高原季节冻土区域的地电场和大地电流场的计算... 详细信息

地电场的变化与台址环境的水文、气象及地质背景等相关,在青藏高原东北部季节冻土区,11个地电场台站处于较高的海拔,据台址下覆场地属性分为A类(黄土型)和B类(高原草场型)台站。通过对青藏高原季节冻土区域的地电场和大地电流场的计算和分析,联系区域构造活动和地质环境得出以下认识:青藏高原东北部季节冻土区地电场变化对水热环境响应明显,冬、夏两季测值可能发生跃变;长周期的地电场变化曲线可能与台址附近气温变化相关;台站大地电流矢量在冻土部分冻融交替过程中发生方向和幅度值的改变。A类和B类台址显示出不同的季节变化规律,地电场曲线上升和下降的时间节点各异,这种现象可应用于监测该区域冻土冻融情况和冻土的时空演变。

关键词：地电场青藏高原东北部季节冻土季节变化

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A Poisoning Outbreak Caused by Anisodus tanguticus — Maqin County, Qinghai Province, china, July 2021

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china CDC weekly 2022年第41期4卷 920-923页

作者： xuebin Guo Qian He Bangguo Qi Chenye Sun DongJin Lyu Hongshun Zhang QingHai Center for Disease Control and Prevention Xi’ning CityQinghai ProvinceChina National institute of Occupational Health and Poison Control Chinese Center for Disease Control and PreventionBeijingChina Chinese Center for Disease Control and Prevention BeijingChina.

Summary What is already known about this topic?Anisodus tanguticus belongs to the Solanaceae *** plant is toxic due to the tropane alkaloids it contains and can cause poisoning when it is ingested or used *** is added by this report?A poisoning outbreak involved 10 patients,and one death was caused by Anisodus *** etiological association of plant exposure and poisoning was confirmed with evidence from an epidemiological investigation,clinical manifestations,plant identification and a toxin analysis.

关键词： fir icu break

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天津市大黄堡湿地生态地质环境脆弱性评价及对策研究

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环境科学与管理 2024年第5期49卷 175-180页

作者：郭立君董路阳王林海张学斌韩荣文天津市地质调查研究院天津300191

在阐述大黄堡湿地生态地质环境条件基础上,选取湿地水涵养状态、水文地质条件、水土环境质量、生物多样性及人类工程活动等多个评价因子,利用傅勒三角形法确定各评价因子的权重,采用综合指数法对大黄堡湿地生态地质环境脆弱性进行了综... 详细信息

在阐述大黄堡湿地生态地质环境条件基础上,选取湿地水涵养状态、水文地质条件、水土环境质量、生物多样性及人类工程活动等多个评价因子,利用傅勒三角形法确定各评价因子的权重,采用综合指数法对大黄堡湿地生态地质环境脆弱性进行了综合评价。评价结果显示,大黄堡湿地可划分为生态地质环境脆弱性低区、中等区、较高区和高区4个区,其中核心区西南一带处于脆弱性低区,分布面积共为0.73 km^(2);湿地北部和南部的芦苇沼泽、上马台水库等处于脆弱中等区,分布面积共13.27 km^(2);湿地内各村镇坑塘,北京排污河、狼尔窝引河等水系处于脆弱性较高区,分布面积共68.16 km^(2);大黄堡湿地东部与南部水产养殖区以及村镇居民区等处于脆弱性高区,分布面积共29.84 km^(2)。

关键词：生态地质环境评价因子脆弱性评价大黄堡湿地

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独居石优溶渣浸出过程研究

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有色金属（冶炼部分） 2024年第2期 99-106页

作者：刘康苏学斌梁耕宇程浩王桂硕张承天刘忠臣刘会武向秋林核工业北京化工冶金研究院北京101149 中国铀业有限公司北京100013

独居石是典型伴生铀、钍的稀土矿资源,通过现有的碱溶转化、优溶等步骤提取稀土后,所得优溶渣是富含铀、钍、稀土的重要二次资源。为与稀土提取保持一致的盐酸体系,研究优溶渣的盐酸浸出过程对整体回收工艺十分关键。采取单因素试验考... 详细信息

独居石是典型伴生铀、钍的稀土矿资源,通过现有的碱溶转化、优溶等步骤提取稀土后,所得优溶渣是富含铀、钍、稀土的重要二次资源。为与稀土提取保持一致的盐酸体系,研究优溶渣的盐酸浸出过程对整体回收工艺十分关键。采取单因素试验考察浸出过程条件对铀、钍、稀土浸出率的影响。结果表明,使用下述优化参数:盐酸浓度6 mol/L、浸出时间1.5~2 h、浸出温度60℃、液固体积质量比3 mL/g时,优溶渣中铀、钍、稀土的浸出率分别可达90%~95%、92%~93%、>60%,实现了较高的资源回收率。浸出渣的工艺矿物学分析表明,其主要由锆石、钍化合物和石英等脉石矿物组成。剩余的稀土组分则主要集中在未分解的独居石中,其余为少量磷钇矿和褐钇铌矿。试验结果可为独居石优溶渣的综合回收技术提供基础数据和支撑。

关键词：独居石优溶渣盐酸浸出铀钍稀土

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摆线齿轮执行机构传动性能研究

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传动技术 2024年第1期38卷 9-12页

作者：付超郭相坤顾振宇白学斌赵健涛中国第一汽车股份有限公司研发总院长春130000

执行机构作为EV减速器和混动变速器的重要组成部分,其性能的优劣不仅关系到传动系统的换挡可靠性,还影响整车的行驶舒适性。目前,国内针对多挡减速器和混动变速器执行机构的性能要求不断提高,亟需在这领域进行性能提升研究工作。基于减... 详细信息

执行机构作为EV减速器和混动变速器的重要组成部分,其性能的优劣不仅关系到传动系统的换挡可靠性,还影响整车的行驶舒适性。目前,国内针对多挡减速器和混动变速器执行机构的性能要求不断提高,亟需在这领域进行性能提升研究工作。基于减速器和混动变速器的换挡需求,设计开发了一套采用无刷电机的摆线齿轮执行机构。通过摆线齿轮齿形修形设计,搭建了多体动力学模型并分析了摆线齿轮传动机构的传动效率及疲劳强度,并开展了相关试验验证,取得了良好效果。

关键词：执行机构摆线齿轮传动效率

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基于数值模拟的通海阀铜合金铸件工艺优化

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铸造技术 2024年第1期45卷 81-87页

作者：余勃张学宾杨冉周延军郁炎刘乐乐河南科技大学材料科学与工程学院河南洛阳471000 有色金属新材料与先进加工技术省部共建协同创新中心河南洛阳471000 河南省有色金属材料科学与加工技术重点实验室河南洛阳471000 河南科技大学医学技术与工程学院河南洛阳471000 洛阳船舶材料研究所(中国船舶集团有限公司第七二五研究所) 河南洛阳471000

针对某船舶通海阀在铸造过程中易产生缩孔、缩松等缺陷问题,以Cu-7Ni-7Al-4Fe-2Mn合金通海阀铸件为研究对象,使用三维制图软件UG构建了铸件3D模型,并结合通海阀铸件的结构特性,设计了底注式浇注系统。利用数值模拟软件模拟了铸件的砂型... 详细信息

针对某船舶通海阀在铸造过程中易产生缩孔、缩松等缺陷问题,以Cu-7Ni-7Al-4Fe-2Mn合金通海阀铸件为研究对象,使用三维制图软件UG构建了铸件3D模型,并结合通海阀铸件的结构特性,设计了底注式浇注系统。利用数值模拟软件模拟了铸件的砂型铸造过程,分析了可能出现缩孔、缩松缺陷的位置,优化了通海阀铸件的浇注系统。研究了浇注温度、浇注时间、铸型预热温度等参数对铸件缩孔、缩松率的影响规律,结合正交试验方法优化出匹配的铸造工艺参数。研究结果表明,工艺参数对通海阀铸件缩孔率的影响程度从大到小依次是浇注时间、铸型预热温度、浇注温度。优化后的工艺参数分别为浇注温度1 200℃,浇注时间30 s,铸型预热温度35℃。通过在铸造缺陷较多的部位增大冒口尺寸,有效减少了缩孔、缩松铸造缺陷的产生。

关键词：通海阀 Cu-7Ni-7Al-4Fe-2Mn合金砂型铸造数值模拟工艺优化

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