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Multidimensional regulation of Ti-Zr-Cr-Mn hydrogen storage alloys via Y partial substitution

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Nano Research 2024年第5期17卷 4211-4220页

作者： Haixiang Xiu Wanqiang Liu Dongming Yin Nan Ding Wenfeng Qiao shaolei zhao Long Liang Cong Liu Shaohua Wang Qingshuang Wang Bingbing Chen Limin Wang Yong Cheng School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun 130022China State Key Laboratory of Rare Earth Resources Utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences(CAS)Changchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China Department of Energy Science and Engineering Nanjing Tech UniversityNanjing 211816China National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy GRINM Group Co.Ltd.Beijing 100088China GRIMAT Engineering Institute Co. Ltd.Beijing 101407China College of Life Science and Technology Changchun University of Science and TechnologyChangchun 130022China

High density and safe storage of hydrogen are the preconditions for the large-scale application of hydrogen ***,the hydrogen storage properties of Ti_(0.6)Zr_(0.4)Cr_(0.6)Mn_(1.4) alloys are systematically studied by introducing Y element instead of Ti element through vacuum arc *** the partial substitution of Y,a second phase of rare earth oxide is added in addition to the main suction hydrogen phase,C14 Laves *** to the unique properties of rare earth elements,the partial substitution of Y can not only improve the activation properties and plateau pressure of the alloys,but also increase the effective hydrogen storage capacity of the *** comprehensive properties of hydrogen storage alloys are improved by multidimensional regulation of rare earth *** them,Ti_(0.552)Y_(0.048)Zr_(0.4)Cr_(0.6)Mn_(1.4) has the best comprehensive *** alloy can absorb hydrogen without activation at room temperature and 5 MPa,with a maximum hydrogen storage capacity of 1.98 wt.%.At the same time,it reduces the stability of the hydride and the enthalpy change value,making it easier to release *** theoretical analysis and first-principle simulation,the results show that the substitution of Y element reduces the migration energy barrier of hydrogen and the structural stability of the system,which is conducive to hydrogen *** alloy has superior durability compared to the original alloy,and the capacity retention rate was 96.79%after 100 hydrogen absorption/desorption cycles.

关键词： AB_(2)-type hydrogen storage alloy rare earth element first-principles simulation multidimensional regulation

ICP-QQQ-MS法分析婴幼儿谷物辅助食品中镉含量的干扰及其校正

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食品科学 2024年第14期45卷 234-239页

作者：蔡玮赵博赵少雷陈欢欢李潇逯海韦超中国计量科学研究院化学计量与分析科学研究所北京100029 北京市计量检测科学研究院北京100029

建立三重串联四极杆电感耦合等离子体质谱(inductively coupled plasma triple quadrupole mass spectrometry,ICP-QQQ-MS)法测定婴幼儿谷物辅助食品中镉(Cd)含量的方法。研究单四极杆氦气碰撞模式(SQ-He)、串联四极杆氦气碰撞模式(QQQ-... 详细信息

建立三重串联四极杆电感耦合等离子体质谱(inductively coupled plasma triple quadrupole mass spectrometry,ICP-QQQ-MS)法测定婴幼儿谷物辅助食品中镉(Cd)含量的方法。研究单四极杆氦气碰撞模式(SQ-He)、串联四极杆氦气碰撞模式(QQQ-He)、串联四极杆氧气反应模式(QQQ-O_(2))3种碰撞/反应模式下质谱测量中存在的各类干扰,并进行逐一分析、消除。结果显示,抗基体、抗氧化物和多原子离子干扰能力均为QQQ-O_(2)>QQQ-He>SQ-He,采用QQQ-O_(2)模式联合标准加入法可获得更为准确的干扰消除效果。通过引入干扰校正方程,有效解决由于同量异位素锡(Sn)干扰导致的Cd同位素丰度比与天然丰度比不一致问题。QQQ-O_(2)模式下同位素稀释质谱法与标准加入法测量Cd的结果等效一致,证明婴幼儿谷物辅助食品中Cd测量时受到的基体效应和质谱干扰被有效消除。所建方法为使用ICP-QQQ-MS准确测定复杂基体样品中Cd提供重要参考。

关键词：镉三重串联四极杆电感耦合等离子体质谱质谱干扰同位素稀释质谱基体效应

Heterojunction synergistic catalysis of MXene-supported PrF_(3)nanosheets for the efficient hydrogen storage of AlH_(3)

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Nano Research 2023年第7期16卷 9546-9552页

作者： Long Liang shaolei zhao Chunli Wang Dongming Yin Shaohua Wang Qingshuang Wang Fei Liang Shouliang Li Limin Wang Yong Cheng State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy GRINM Group Co.Ltd.Beijing 100088China GRIMAT Engineering Institute Co. Ltd.Beijing 101407China College of Life Science and Technology Changchun University of Science and TechnologyChangchun 130022China Henan Nayu New Material Co. Ltd.Xinxiang 453000China

Aluminum hydride is a promising chemical hydrogen storage material that can achieve dehydrogenation under mild conditions as well as high hydrogen storage ***,designing an efficient and cost-effective catalyst,especially a synergistic catalyst,for realizing low-temperature and high-efficiency hydrogen supply remains *** this study,the heterojunction synergistic catalyst of Ti_(3)C_(2)supported PrF_(3)nanosheets considerably improved the dehydrogenation kinetics of AlH_(3)at low temperatures and maintained a high hydrogen storage *** the synergistic catalyst,Pr produced a synergistic coupling interaction through its unique electronic *** sandwich structure with close contact between the two phases enhanced the interaction between species and the synergistic *** initial dehydrogenation temperature of the composite is reduced to 70.2℃,and the dehydrogenation capacity is 8.6 wt.%at 120℃ in 90 min under the kinetic test,which reached 93%of the theoretical hydrogen storage *** catalyst considerably reduced the activation energy of the dehydrogenation ***,the multielectron pairs on the surface of the catalyst promoted electron transfer and accelerated the reaction.

关键词： hydrogen storage aluminium hydride catalysis synergistic effect dehydrogenation

Dehydrogenation behavior and mechanism of LiAlH_(4) adding nano-CeO_(2)with different morphologies

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Nano Research 2023年第7期16卷 9426-9434页

作者： Chunmin Zhang Long Liang shaolei zhao Zhijian Wu Shaohua Wang Dongming Yin Qingshuang Wang Limin Wang Chunli Wang Yong Cheng State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of China(USTC)Hefei 230023China National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy GRINM Group Co.Ltd.Beijing 100088China GRIMAT Engineering Institute Co. Ltd.Beijing 101407China College of Life Science and Technology Changchun University of Science and TechnologyChangchun 130022China

Complex hydride LiAlH_(4),as a hydrogen storage material,possesses high theoretical hydrogen storage capacity(10.5 wt.%).However,highly efficient additives are urgently required to modify its thermal stability and sluggish *** additives exhibit unique morphology-dependent ***,the efficient rare earth oxide nano-CeO_(2)additives with different morphologies(nanoparticles,nanocubes,and nanorods)are prepared by the hydrothermal method,and the intrinsic properties are *** three different morphologies of nano-CeO_(2),which are different in the Ce^(3+)content and specific surface area,are added to LiAlH_(4)to improve the dehydrogenation *** LiAlH_(4)-CeO_(2)-nanorod composite exhibits the optimal dehydrogenation behavior,which begins to desorb hydrogen at 76.6℃ with a hydrogen capacity of 7.17 wt.%,and 3.83 wt.%hydrogen is desorbed within 30 min at 140℃.The dehydrogenation process of the composites demonstrates that hydrogen release is facilitated by the in-situ formed CeH_(2).73 and the facile transition between the oxidation states of Ce^(4+)and Ce^(3+).Combined with density functional theory calculations,the addition of nano-CeO_(2)can weaken the Al-H bond and accelerate the decomposition of[AlH_(4)]^(4-)tetrahedron,which is consistent with the reduction of the decomposition activation energy.

关键词： hydrogen storage LiAlH_(4) nano-CeO_(2) morphology

Strengthening and toughening styrene-butadiene rubber by mechanically interlocked cross-links

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Science China Chemistry 2024年第10期67卷 3414-3422页

作者： Yuanhao Wang Li Yang Lin Cheng Jun zhao Ruixue Bai Wenbin Wang shaolei Qu zhaoming Zhang Wei Yu Xuzhou Yan School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Key Laboratory of Electrical Insulation and Thermal AgingShanghai Jiao Tong University

Styrene-butadiene rubber(SBR) is an indispensable material in modern society, and the necessity for enhanced mechanical properties in SBR persists, particularly to withstand the rigors of challenging environmental conditions. To surmount the limitations of conventional cross-linking modes, mechanical bonds stabilized by host-guest recognition are incorporated as the cross-linking points of SBR to form mechanically interlocked networks(MINs). Compared with covalently cross-linked network, the representative MIN exhibits superior mechanical performance in terms of elongation(1392%) and breaking strength(4.6 MPa), whose toughness has surged by 17 times. Dissociation of host-guest recognition and subsequent sliding motion provide an effective energy dissipation mechanism, and the release of hidden length is also beneficial to enhance ***, the introduction of the rotaxane cross-links made the network more pliable and possess damping and elastic properties, which can return to initial state with one minute rest interval. We aspire that this direct introduction method can serve as a blueprint, offering valuable insights for the enhancement of mechanical properties in conventional commercial polymer materials.

关键词： mechanically interlocked molecules host-guest chemistry styrene-butadiene rubber mechanical properties dynamic materials

Covalent organic frameworks/carbon nanotubes composite with cobalt(II)pyrimidine sites for bifunctional oxygen electrocatalysis

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Nano Materials Science 2024年第4期6卷 419-427页

作者： Zhuangzhuang Wu Lijuan Feng Zhe Lu Xinxin Yu Yuzhen zhao Junming Luo shaolei Wang Xinlong Tian Qi Chen State Key Laboratory of Marine Resource Utilization in South China Sea School of Marine Science and Engineering Hainan University Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education School of Chemistry Northeast Normal University School of Bioengineering Zhuhai Campus of Zunyi Medical University

With characteristics and advantages of functional composite materials, they are commendably adopted in numerous fields especially in oxygen electrocatalysis, which is due to the significant synergies between various components. Herein, a novel bifunctional oxygen electrocatalyst（Co-CNT@COF-Pyr） has been synthesized through in-situ growth of covalent organic frameworks（COFs） layers on the outer surface of highly conductive carbon nanotubes（CNTs） followed by coordination with Co（II）. For electrocatalytic OER, Co-CNT@COF-Pyr reveals a low overpotential（438 mV） in alkaline electrolyte（1.0 M aqueous solution of KOH） with a current density of 10 mA cm-2, which is comparable to most discovered COF-based catalysts. For electrocatalytic ORR, CoCNT@COF-Pyr exhibits a low H2O2yield range（9.0 %–10.1 %） and a reaction pathway close to 4e-（n =3.82–3.80） in alkaline electrolyte（0.1 M aqueous solution of KOH） within the test potential range of 0.1–0.6 V ***, which is superior to most reported COF-based catalysts. Hence, this research could not only offer an innovative insight into the construction of composites, but also facilitate the practical application of renewable fuel cells, closed water cycle, and rechargeable metal-air batteries.

关键词： Oxygen electrocatalysis Covalent organic frameworks Carbon nanotubes Composite materials

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注浆改造厚含水砂层提高开采上限技术及应用

煤田地质与勘探 2023年第5期51卷 113-122页

作者：邢茂林郑士田石志远赵少磊杜博涛崔思源中煤科工西安研究院(集团)有限公司陕西西安710077 陕西省煤矿水害防治技术重点实验室陕西西安710077

为了实现在厚松散含水砂层下留设防塌煤(岩)柱以提高开采上限,研究厚含水砂层区域注浆改造技术。以安徽淮北五沟煤矿1010-1工作面第四含水层(简称四含)下提高上限开采为目标,通过理论计算、注浆材料配比实验和原位注浆试验,对改造范围... 详细信息

为了实现在厚松散含水砂层下留设防塌煤(岩)柱以提高开采上限,研究厚含水砂层区域注浆改造技术。以安徽淮北五沟煤矿1010-1工作面第四含水层(简称四含)下提高上限开采为目标,通过理论计算、注浆材料配比实验和原位注浆试验,对改造范围和层位、注浆材料的适用性、不同深度的浆液配比、钻孔布置方式和注浆方法进行分析,并通过取心测试、水文地质试验和井下钻孔验证对注浆效果进行检验。结果表明:五沟煤矿四含改造区域松散含水砂层底部无黏土,且在有含水风化基岩条件下,提高上限开采需同时注浆改造松散砂层和风化基岩;粉煤灰–水泥浆较石膏–水泥浆具有更好的体积稳定性,粉煤灰掺量20%~50%的粉煤灰–水泥浆结石率大于98%,且有较稳定的凝结强度,能够满足砂层劈裂注浆的需求,风化基岩采用纯水泥浆或10%以内掺量的粉煤灰–水泥浆,基岩之上2倍采高的砂层注入10%~20%掺量的粉煤灰–水泥浆改造后充当保护层,上部采用20%~50%掺量的粉煤灰–水泥浆进行充填压密,粉煤灰掺量随注浆深度递减;注浆终压可在最浅部砂层注浆劈裂压力的基础上,按地层压力和孔隙水压力梯度0.3 MPa/10 m增加;泄压诱导注浆可有效控制浆液的劈裂扩散方向,浆液最大扩散距离达到89.5 m;注浆后砂层和风化基岩完整性显著提高,岩(土)体试块强度提高2~5倍,注浆将砂层改造为富水性弱、极微–微透水的隔水层,可实现留设防塌煤(岩)柱提高上限开采。

关键词：水体下采煤开采上限提高含水砂层区域治理劈裂注浆配比优化安徽五沟煤矿

地面定向顺层钻进注浆技术在金属矿山巷道掩护掘进的应用研究

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当代化工研究 2023年第16期 132-134页

作者：周鹏阳赵少磊李佩中煤科工西安研究院(集团)有限公司陕西710077 陕西省煤矿水害防治技术重点实验室陕西710077

安徽某铁矿巷道在掘进过程中围岩破碎,多处发生涌水,存在极大的安全隐患,严重影响掘进进度。本研究利用地面定向顺层钻进技术沿-350m巷道方位、标高定向钻进,提前揭露巷道掘进沿途可能遇到的破碎围岩及含水裂隙,并在地面对其实施高压连... 详细信息

安徽某铁矿巷道在掘进过程中围岩破碎,多处发生涌水,存在极大的安全隐患,严重影响掘进进度。本研究利用地面定向顺层钻进技术沿-350m巷道方位、标高定向钻进,提前揭露巷道掘进沿途可能遇到的破碎围岩及含水裂隙,并在地面对其实施高压连续注浆充填加固。该方案使巷道破碎围岩得到有效加固并降低水害威胁,保障了-350m巷道的安全高效掘进,不仅为该矿山取得了较大的经济效益,且为金属矿山同类条件下防治水工作提供了思路。

关键词：金属矿山地面定向钻高压注浆巷道掩护掘进

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食品中硒的前处理方法以及检测技术

食品安全导刊 2023年第36期 151-156页

作者：赵悦王冰玥冷小京赵少雷孟雪赵海波北京市计量检测科学研究院北京100029 中国农业大学食品科学与营养工程学院北京100081

硒是人体不可或缺的微量营养元素,对维持生命健康至关重要。硒元素不能在人体内自行合成,食品是人体获取硒的首要来源。硒的营养性和毒性与硒总浓度水平有关,适量摄入硒元素可以增强机体的免疫力和抵抗力,预防癌症发生和抗衰老等。本文... 详细信息

硒是人体不可或缺的微量营养元素,对维持生命健康至关重要。硒元素不能在人体内自行合成,食品是人体获取硒的首要来源。硒的营养性和毒性与硒总浓度水平有关,适量摄入硒元素可以增强机体的免疫力和抵抗力,预防癌症发生和抗衰老等。本文介绍了食品中硒的前处理方法和检测技术,以期为食品中硒检测技术开发提供参考。

关键词：食品硒前处理方法检测技术