检索结果-南通市图书馆

Exceptional catalytic effect of novel rGO-supported Ni-Nb nanocomposite on the hydrogen storage properties of MgH_(2)

引用

Journal of Materials Science & Technology 2024年第5期172卷 83-93页

作者： Samuel Guemou liuting zhang Shuai Li Yiqun Jiang Tao Zhong Zichuan Lu Ren Zhou Fuying Wu Qian Li School of Energy and Power Instrumental Analysis CenterJiangsu University of Science and TechnologyZhenjiang 212003China National Engineering Research Center for Magnesium Alloys&National Key Laboratory of Advanced Casting Technologies&College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Chongqing Institute of New Energy Storage Materials and Equipment Chongqing 401135China Max Planck Institute for Iron Research Düsseldorf 40237Germany

The design of an excellent active catalyst to improve the sluggish kinetic and thermodynamic properties of magnesium hydride(MgH_(2))remains a great challenge to achieve its practical *** this study,a novel Ni-Nb/rGO nanocomposite catalyst was successfully prepared by one-spot hydrothermal and sub-sequent calcination *** novel Ni-Nb/rGO nanocomposite exhibits an exceptional catalytic effect on improving MgH_(2) sorption ***,the onset desorption temperature of MgH_(2)+10 wt%Ni-Nb/rGO composite is reduced to 198℃,much lower than that of undoped MgH_(2)(330℃).In-terestingly,the composite can release 5.0,5.9,and 6.0 wt%H_(2) within 10 min at 245,260,and 275℃,***,the dehydrogenated MgH_(2)+10 wt%Ni-Nb/rGO composite starts to absorb hydrogen even at room temperature with approximate 2.75 wt%H_(2) uptake at 75℃under 3 MPa H_(2) pressure within 30 min and exhibits excellent stability by maintaining 6.0 wt%hydrogen content after 20 cycles at 300℃.Chou’s model suggests that the de/hydrogenation kinetics of Ni-Nb/rGO-modified MgH_(2) switches from surface penetration model to diffusion model at lower ***,the ac-tivation energies(E a)for the de/hydrogenation of MgH_(2)+10 wt%Ni-Nb/rGO are reduced to 57.8 kJ/mol and 33.9 kJ/mol,which are significantly lower than those of undoped MgH_(2).The work demonstrates that the addition of a novel ternary Ni-Nb/rGO catalyst is an effective strategy to not only boost the sorption kinetics of MgH_(2) but also maintain its cycling property.

关键词： Hydrogen storage materials Magnesium hydride Ni-Nb/rGO Kinetic analysis Catalytic mechanism

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

Constructing graphene nanosheet-supported FeOOH nanodots for hydrogen storage of MgH2

引用

International Journal of Minerals,Metallurgy and Materials 2022年第7期29卷 1464-1473页

作者： Mengchen Song liuting zhang Jiaguang Zheng Zidong Yu Shengnan Wang School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China Institute of Chemical Materials China Academy of Engineering PhysicsMianyang 621999China

Novel graphene-supported FeOOH nanodots(FeOOH NDs@G)were successfully prepared by a facile hydrothermal method and doped into MgH_(2)through mechanical ***_(2)with 10wt%FeOOH NDs@G began to release hydrogen at 229.8℃,which is106.8℃ lower than that of pure MgH_(2).The MgH_(2)-10wt%FeOOH NDs@G composite could reversibly absorb 6.0wt%hydrogen at 200℃ under a 3.2 MPa hydrogen pressure within 60 *** the addition of FeOOH NDs@G,the dehydrogenation and hydrogenation activation energy of MgH_(2)was decreased to 125.03 and 58.20 kJ·mol^(-1)(156.05 and 82.80 kJ·mol^(-1)for pure MgH_(2)),***,the hydrogen capacity of the FeOOH NDs@G composite retained 98.5%of the initial capacity after 20 cycles,showing good cyclic *** catalytic action of FeOOH NDs@G towards MgH_(2)could be attributed to the synergistic effect between graphene nanosheets and in-situ formed Fe,which prevented the aggregation of Mg/MgH2 particles and accelerated the hydrogen diffusion during cycling,thus enabling the Mg H_(2)-10wt%FeOOH NDs@G composite to exhibit excellent hydrogen storage performance.

关键词： hydrogen storage MgH_(2) FeOOH NDs@G catalysis

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

Boosting the hydrogen storage performance of magnesium hydride with metal organic framework-derived Cobalt@Nickel oxide bimetallic catalyst

引用

Chinese Journal of Chemical Engineering 2022年第12期52卷 161-171页

作者： Yan zhang Jiaguang Zheng Zhiyu Lu Mengchen Song Jiahuan He Fuying Wu liuting zhang School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China Analysis and Testing Center Jiangsu University of Science and TechnologyZhenjiang 212003China State Key Laboratory of Silicon Materials Department of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China

In this study,a MOF-derived bimetallic Co@NiO catalyst was synthesized and doped into MgH_(2)to improve the hydrogen desorption and resorption *** Co@NiO catalyst decreased the onset dehydrogenation temperature of MgH_(2)by 160℃,compared with un-doped MgH_(2).The MgH^(2+)9%(mass)Co@NiO composite released 6.6%(mass)hydrogen in 350 s at 315℃and uptook 5.4%(mass)hydrogen in500 s at 165℃,showing greatly accelerated de/rehydrogenation ***,the desorption activation energy of MgH^(2+)9%(mass)Co@NiO was decreased to(93.8±8.4)kJ·mol^(-1).Noteworthy,symbiotic Mg_(2)NiH_(4)/Mg_(2)CoH_(5)clusters were in-situ formed from bimetallic precursors and inlaid on MgH_(2)surface,which are considered as"multi-step hydrogen pumps",and provides surface pathways for hydrogen ***,the introduced Mg_(2)NiH_(4)/Mg_(2)CoH_(5)interfaces could provide numerous low energy barrier H diffusion channels,therefore accelerating the hydrogen release and *** research proposes new insights to design high-efficiency bimetallic catalyst for MgH_(2)hydrogen storage.

关键词： Hydrogen Absorption Catalyst MgH_(2) Bimetallic materials Synergistic effect

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

FeCoNiCrMo high entropy alloy nanosheets catalyzed magnesium hydride for solid-state hydrogen storage

引用

International Journal of Minerals,Metallurgy and Materials 2023年第11期30卷 2270-2279页

作者： Tao Zhong Haoyu zhang Mengchen Song Yiqun Jiang Danhong Shang Fuying Wu liuting zhang School of Energy and Power Instrumental Analysis CenterJiangsu University of Science and TechnologyZhenjiang 212003China Max Planck Institute for Iron Research Düsseldorf40237Germany School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

The catalytic effect of FeCoNiCrMo high entropy alloy nanosheets on the hydrogen storage performance of magnesium hydride(MgH_(2))was investigated for the first time in this *** results demonstrated that 9wt%FeCoNiCrMo doped MgH_(2)started to dehydrogenate at 200℃and discharged up to 5.89wt%hydrogen within 60 min at 325℃.The fully dehydrogenated composite could absorb3.23wt%hydrogen in 50 min at a temperature as low as 100℃.The calculated de/hydrogenation activation energy values decreased by44.21%/55.22%compared with MgH_(2),***,the composite’s hydrogen capacity dropped only 0.28wt%after 20 cycles,demonstrating remarkable cycling *** microstructure analysis verified that the five elements,Fe,Co,Ni,Cr,and Mo,remained stable in the form of high entropy alloy during the cycling process,and synergistically serving as a catalytic union to boost the de/hydrogenation reactions of MgH_(2).Besides,the FeCoNiCrMo nanosheets had close contact with MgH_(2),providing numerous non-homogeneous activation sites and diffusion channels for the rapid transfer of hydrogen,thus obtaining a superior catalytic effect.

关键词： hydrogen storage magnesium hydride high entropy alloy nano-sheets catalysis

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

Recent advances of magnesium hydride as an energy storage material

引用

Journal of Materials Science & Technology 2023年第18期149卷 99-111页

作者： Mengchen Song liuting zhang Fuying Wu Haoyu zhang Hu Zhao Lixin Chen Hong Li School of Energy and Power Instrumental Analysis CenterJiangsu University of Science and TechnologyZhenjiang 212003China School of Mechanical and Aerospace Engineering Nanyang Technological University639798Singapore State Key Laboratory of Silicon Materials Department of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China

Energy storage is the key for large-scale application of renewable energy,however,massive efficient en-ergy storage is very *** hydride(MgH_(2))offers a wide range of potential applications as an energy carrier due to its advantages of low cost,abundant supplies,and high energy storage ***,the practical application of MgH_(2) for energy storage is still impeded by its sluggish kinetics,poor cycling stability,***,we provide an overview of recent advances of MgH_(2) for enhancing the hydrogen storage,lithium-ion storage,and heat storage *** hydrogen storage,a particular emphasis was put on altering the kinetics and thermodynamics of MgH_(2) via catalyzing,alloying,nano-sizing,and *** to MgH_(2) as a battery anode material mainly focus on the effect of additives,electrolytes,and structure *** heat storage apparatus was proposed based on MgH_(2) and coupled with other materials or systems to improve the heat storage and economic ***,prospects of MgH_(2) in these fields are *** review would stimulate more insightful and pioneering research for the design and preparation of MgH_(2) with excellent energy storage performances.

关键词： Magnesium hydride Energy storage Hydrogen storage Li-ion battery Heat storage

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

Bullet-like vanadium-based MOFs as a highly active catalyst for promoting the hydrogen storage property in MgH_(2)

引用

International Journal of Minerals,Metallurgy and Materials 2023年第1期30卷 44-53页

作者： Zhiyu Lu Jiahuan He Mengchen Song Yan zhang Fuying Wu Jiaguang Zheng liuting zhang Lixin Chen School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China Instrumental Analysis Center Jiangsu University of Science and TechnologyZhenjiang 212003China State Key Laboratory of Silicon Materials Department of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China

The practical application of magnesium hydride(MgH_(2))was seriously limited by its high desorption temperature and slow desorp-tion *** this study,a bullet-like catalyst based on vanadium related MOFs(MOFs-V)was successfully synthesized and doped with MgH_(2) by ball milling to improve its hydrogen storage *** analysis demonstrated that the as-synthesized MOFs was consisted of V_(2)O_(3) with a bullet-like *** adding 7wt%MOFs-V,the initial desorption temperature of MgH_(2) was reduced from 340.0 to 190.6℃.Besides,the MgH_(2)+7wt%MOFs-V composite released 6.4wt%H_(2) within 5 min at 300℃.Hydrogen uptake was started at 60℃under 3200 kPa hydrogen pressure for the 7wt%MOFs-V containing *** desorption and absorption apparent activity energies of the MgH_(2)+7wt%MOFs-V composite were calculated to be(98.4±2.9)and(30.3±2.1)kJ·mol^(-1),much lower than(157.5±3.3)and(78.2±3.4)kJ·mol^(−1) for the as-prepared MgH_(2).The MgH_(2)+7wt%MOFs-V composite exhibited superior cyclic *** the 20 cycles isothermal dehydrogenation and hydrogenation experiments,the hydrogen storage capacity stayed almost unchanged.X-ray diffraction(XRD)and X-ray photoelectron spectrometer(XPS)measurements confirmed the presence of metallic vanadium in the MgH_(2)+7wt%MOFs-V composite,which served as catalytic unit to markedly improve the hydrogen storage properties of Mg/MgH_(2) system.

关键词： hydrogen storage magnesium hydrides vanadium based MOFs catalytic mechanism

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

Metal organic framework supported niobium pentoxide nanoparticles with exceptional catalytic effect on hydrogen storage behavior of MgH_(2)

引用

Green Energy & Environment 2023年第2期8卷 589-600页

作者： liuting zhang Farai Michael Nyahuma Haoyu zhang Changshan Cheng Jiaguang Zheng Fuying Wu Lixin Chen School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China Analysis and Testing Center Jiangsu University of Science and TechnologyZhenjiang 212003China State Key Laboratory of Silicon Materials Department of Materials Science andEngineeringZhejiang UniversityHangzhou 310027China

Nb_(2)O_(5)nanoparticles with an average particle size of 10 nm supported on a rhombic dodecahedral metal organic framework(MOF)were successfully synthesized by a facile one-pot hydrothermal reaction and subsequent calcination *** results demonstrated that the prepared catalyst drastically improved the hydrogen storage behavior of MgH_(2).7 wt%Nb_(2)O_(5)@MOF doped MgH_(2)started to desorb hydrogen at 181.9℃and 6.2 wt%hydrogen could be released within 2.6 min and 6.3 min at 275℃and 250℃,*** fully dehydrogenated composite also displayed excellent hydrogenation by decreasing the onset absorption temperature to 25℃and taking up4.9 wt%and 6.5 wt%hydrogen within 6 min at 1750C and 1500C,***,the corresponding activation energy was calculated to be 75.57±4.16 kJ mol^(-1)for desorption reaction and 51.38±1.09 kJ mol^(-1)for absorption *** 20 cycles,0.5 wt%hydrogen capacity was lost for the MgH_(2)+7 wt%Nb_(2)O_(5)@MOF composite,much lower than 1.5 wt%of the MgH_(2)+7 wt%Nb_(2)O_(5)***,the addition of Nb_(2)O_(5)@MOF had limited effect on reducing the dehydrogenation enthalpy of MgH_(2).Microstructure analysis revealed that Nb_(2)O_(5)particles were uniformly distributed on surface of the MgH_(2)matrix and synergistically improved the hydrogen storage property of MgH_(2)with MOF.

关键词： Hydrogen storage MgH_(2) Nb_(2)O_(5)@MOF Reversibility Catalytic mechanism

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

二维层状麦克烯材料Nb_(2)C催化改性Mg(BH_(4))_(2)储氢性能研究

引用

江苏科技大学学报（自然科学版） 2024年第1期38卷 36-41页

作者：郑家广张智张焱章浩宇吴富英张刘挺江苏科技大学能源与动力学院镇江212100 江苏科技大学分析测试中心镇江212100

硼氢化镁(Mg(BH_(4))_(2))因具有14.9%的储氢量,被认为是一种具有良好前景的高容量储氢材料.考虑到二维层状过渡金属碳化物麦克烯材料(MXene)对Mg(BH_(4))_(2)的放氢过程具有显著的催化效果,文中采用酸刻蚀法制备了微观表征为二维层状的... 详细信息

硼氢化镁(Mg(BH_(4))_(2))因具有14.9%的储氢量,被认为是一种具有良好前景的高容量储氢材料.考虑到二维层状过渡金属碳化物麦克烯材料(MXene)对Mg(BH_(4))_(2)的放氢过程具有显著的催化效果,文中采用酸刻蚀法制备了微观表征为二维层状的MXene材料碳化铌(Nb_(2)C),并通过机械球磨法将所制备的Nb_(2)C掺杂到Mg(BH_(4))_(2)中,以此来催化改性Mg(BH_(4))_(2)的放氢性能.由程序控温放氢(TPD)测试可得:在Mg(BH_(4))_(2)-x%Nb_(2)C(x=20,30,40)催化改性体系中,当x=40时,Mg(BH_(4))_(2)-40%Nb_(2)C体系的起始放氢温度可降至130℃左右,且升温至500℃后,可释放出12.8%H_(2),而未添加Nb_(2)C的纯Mg(BH_(4))_(2)约在285℃才开始放氢.除此之外,该体系在等温放氢测试中也表现出良好的放氢动力学性能,且由该体系改性后的放氢动力学性能可以在随后的第二和第三次吸放氢循环中保留下来,表现出良好的循环性能.

关键词：硼氢化镁 Nb_(2)麦克烯储氢性能放氢动力学

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

Combined “Gateway” and “Spillover” effects originated from a CeNi_(5) alloy catalyst for hydrogen storage of MgH_(2)

引用

International Journal of Minerals,Metallurgy and Materials 2023年第5期30卷 970-976页

作者： Mengchen Song Runkai Xie liuting zhang Xuan Wang Zhendong Yao Tao Wei Danhong Shang School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China School of Materials and Chemistry China Jiliang UniversityHangzhou 310018China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

Efficient catalysts enable MgH2 with superior hydrogen storage ***,we successfully synthesized a catalyst composed of Ce and Ni (***_(5) alloy) with splendid catalytic action for boosting the hydrogen storage property of magnesium hydride (MgH_(2))The MgH2–5wt%CeNi_(5) composite’s initial hydrogen release temperature was reduced to 174℃ and approximately 6.4wt%H_(2) was released at 275℃ within 10 ***,the dehydrogenation enthalpy of MgH_(2) was slightly decreased by adding CeNi_(5).For hydrogenation,the fully dehydrogenated sample absorbed 4.8wt%H_(2) at a low temperature of 175℃.The hydrogenation apparent activation energy was decreased from(73.60±1.79) to (46.12±7.33) kJ/*** analysis revealed that Mg_(2)Ni/Mg_(2)NiH_(4) and CeH_(2.73) were formed during the process of hydrogen absorption and desorption,exerted combined“Gateway”and“Spillover”effects to reduce the operating temperature and improve the hydrogen storage kinetics of MgH_(2).Our work provides an example of merging“Gateway”and“Spillover”effects in one catalyst and may shed light on designing novel highly-effective catalysts for MgH_(2) in near future.

关键词： hydrogen storage magnesium hydride cerium–nickel alloys catalysis

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

Significantly improved hydrogen storage behaviors in MgH_(2) with Nb nanocatalyst

引用

International Journal of Minerals,Metallurgy and Materials 2022年第9期29卷 1788-1797页

作者： Farai Michael Nyahuma liuting zhang Mengchen Song Xiong Lu Beibei Xiao Jiaguang Zheng Fuying Wu School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China Analysis and Testing Center Jiangsu University of Science and TechnologyZhenjiang 212003China

The study explores the excellent modification effect of Nb nanocatalyst prepared via surfactant assisted ball milling technique(SABM)on the hydrogen storage properties of MgH_(2).Optimal catalyst doping concentration was determined by comparing onset decomposition temperature,released hydrogen capacity,and reaction rate for different MgH_(2)-ywt%Nb(y=0,3,5,7,9)*** MgH_(2)-5wt%Nb composite started releasing hydrogen at 186.7℃ and a total of 7.0wt%hydrogen was released in the dehydrogenation *** addition,5wt%Nb doped MgH_(2) also managed to release 4.2wt%H_(2) within 14 min at 250℃ and had the ability to absorb 4.0wt%hydrogen in 30 min at 100℃.Cycling tests revealed that MgH_(2)-5wt%Nb could retain 6.3wt%H_(2) storage capacity(89.2%)after 20 *** and hydrogenation activation energy values were decreased from 140.51±4.74 and 70.67±2.07 kJ·mol^(−1) to 90.04±2.83 and 53.46±3.33 kJ·mol^(−1) after doping MgH_(2) with Nb,*** analysis proved that homogeneously distributed NbH acted as active catalytic unit for improving the hydrogen storage performance of MgH_(2).These results indicate SABM can be considered as an option to develop other nanocatalysts for energy related areas.

关键词： hydrogen storage magnesium hydride surfactant assisted ball milling Nb nanosheets

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

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：