检索结果-南通市图书馆

Journal of Energy Chemistry 2020年第11期29卷 358-364页

作者： Jirong Cui weijin zhang Hujun Cao Ping Chen Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China Collaborative Innovation Center of Chemistry for Energy Materials Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

In this paper, A2ZnH4(A = K, Rb and Cs) have been synthesized for the first time by a new approach involving in two-step reactions, in which the target samples can be produced under mild conditions(160 ℃ for 4 h). What’s more, the additive effects of A2ZnH4 on the hydrogen storage properties of 2LiH-Mg(NH2)2 composite have been investigated systematically. Experimental results show that K2ZnH4 has the best comprehensive modification effects among these hydrides. The 2LiH-Mg(NH2)2-0.1 K2ZnH4 sample shifts dehydrogenation peak temperature downwards by ca. 30 ℃ as compared to the pristine sample. In addition, about 70% extent of the theoretical hydrogen is able to desorb from the 0.1 K2ZnH4 doped sample at 140 ℃ within 2 h, however, only 20% extent of hydrogen is liberated from the pure sample under the same conditions. The improved desorption kinetics is indicated by the reduced dehydrogenation activation energy(Ea), the Ea of the 0.1 K2ZnH4 doped sample is around 68 ± 1.0 kJ mol-1 which is 28% lower than that of the pristine one. Furthermore, the dehydrogenation mechanism of the K2ZnH4 doped sample has been proposed.

关键词： 2LiH-Mg(NH2)2 Ternary hydride K2ZnH4 Two-step reaction Kinetics

Effect of BaNH,CaNH,Mg3N2 on the activity of Co in NH3 decomposition catalysis

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2020年第7期29卷 16-21,I0002页

作者： Pei Yu Han Wu Jianping Guo Peikun Wang Fei Chang Wenbo Gao weijin zhang Lin Liu Ping Chen Dalian Institute of Chemical Physics Dalian National Laboratory for Clean EnergyChinese Academy of SciencesDalian 116023LiaoningChina Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101ShandongChina Collaborative Innovation Center of Chemistry for Energy Materials Dalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China

Development of active and non-noble metal-based catalyst for H2 production via NH3 decomposition is crucial for the implementation of NH3 as a H2 ***-based catalysts have received increasing attention because of its high intrinsic activity and moderate *** this work,we examined the effect of BaNH,CaNH and Mg3 N2 on the catalytic activity of Co in the NH3 decomposition *** H2 formation rate ranks the order as Co-BaNH>Co-CaNH>Co-Mg3 N2≈Co/CNTs within a reaction temperature range of 300-550℃.It is worth pointing out that the H2 formation rate of Co-BaNH at 500℃reaches20 mmolH2 gcat-1 min-1,which is comparable to those of the active Ru/Al2 O3(ca.17 mmolH2 gcat-1 min1)and Ru/AC(21 mmolH2 gcat-1 min-1)catalysts under the similar reaction ***-depth research shows that Co-BaNH exhibits an obviously higher intrinsic activity and much lower Ea(46.2 kJ mol-1)than other Co-based catalysts,suggesting that BaNH may play a different role from CaNH,Mg3 N2 and CNTs during the catalytic *** results of XRD,Ar-TPD and XAS show that a[Co-N-Ba]-like intermediate species is likely formed at the interface of Co metal and BaNH,which may lead to a more energy-efficient reaction pathway than that of neat Co metal for NH3 decomposition.

关键词： Alkaline earth metal imide Cobalt NH3 decomposition Heterogeneous catalysis

Tuning the electronic conductance of REH_(x)(RE=Nd,Ce,Pr)by structural deformation

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第8期95卷 440-445,I0010页

作者： Shangshang Wang weijin zhang Jirong Cui Shukun Liu Hong Wen Jianping Guo Teng He Hujun Cao Ping Chen Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023LiaoningChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Catalysis Chinese Academy of SciencesDalian 116023LiaoningChina

Hydride ion(H-)conductors have drawn much attention due to their potential applications in hydrideion-based *** earth metal hydrides(REH_(x))have fast H-conduction which,unfortunately,is accompanied by detrimental electron conduction preventing their application as ion ***,REH_(x)(RE=Nd,Ce,and Pr)with varied grain sizes,rich grain boundaries,and defects have been prepared by ball milling and subsequent *** electronic conductivity of the ball-milled REH_(x)samples can be reduced by 2-4 orders of magnitude compared with the non-ball-milled *** relationship of electron conduction and miscrostructures in REH_(x)is studied and discussed based on experimental data and previously-proposed classical and quantum *** H-conductivity of all REH_(x)is about 10^(-4)to 10^(-3)S cm^(-1)at room temperature,showing promise for the development of H-conductors and their applications in clean energy storage and conversion.

关键词： Hydride ion conduction Electron conduction Nanosized grain Crystal defect Electron scattering

Effects of doping FeCl3 on hydrogen storage properties of Li-N-H system

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2017年第1期27卷 139-143页

作者： weijin zhang Han Wang Hujun Cao Teng He Jianping Guo Guotao Wu Ping Chen Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Institute of Materials Research Materials Technology Helmholtz-Zentrum Geesthacht

The effects of doping FeCl3on the LiNH2-2LiH system were investigated systematically. FeCl3was prior to react with LiH during ball milling their mixtures. The metallic Fe, which is generated from metathesis reaction between FeCl3and LiH, plays an important role on improving the dehydrogenation kinetics of LiNH2-2LiH system. The results indicated that the dehydrogenation peak and ending temperatures of the doped 1 mol%FeCl3sample shifted to low temperatures, and the dehydrogenation active energy changed from 102.45 k J/mol to 87.52 k J/mol. While increasing the amount of FeCl3, an excess of LiCl, the by-product of metathesis reaction between FeCl3and Li H, can stabilize LiNH2and thus hinder hydrogen desorption. The dehydrogenation product is a new solid cubic phase solution of lithium imide-chloride. The high limit of the solid solution of LiCl and Li2NH is near the molar ratio of 1:1.

关键词： Hydrogen storage Iron trichloride Lithium amide Reaction kinetics Solid solution Lithium imide-chloride

Effect of TRX Suspension Training on Physical Function in Elderly Men with Sarcopenia

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Clinical and Nursing Research 2022年第6期6卷 147-151页

作者： weijin zhang Sangmyung University Seoul 03016South Korea

Elderly people have reduced muscle mass,decreased physical function and an increased hospitalization probability,which affect their quality of life and even lead to death in severe *** at home and abroad have studied progressive body muscle loss associated with increase of age,decreased muscle strength and muscle function impairment syndrome and how to prevent *** research have been done preventing diseases and improving muscle strength through exercising,nutrition,and drug intervention,and these measures have been proven *** article describes the effect of exercising in reducing muscle disease,improving muscle mass,and physical abilities of the *** study can not only effectively enrich the research results related to exercise therapy of sarcopenia,but is also in line with national strategies and policies such as the“national fitness campaign,”“Healthy China 2030 Plan Outline,”and“Healthy China Action 2019-2030”depending on the health conditions of the elderly ***,this paper aims to develop individualized exercise programs,provide scientific basis for the prevention and treatment of sarcopenia in the elderly,reduce the risk of fall damage in the elderly,and promote the physical health level of the elderly.

关键词： Elderly Resistance movement Sarcopenia Muscle strength Ability to walk

Dinitrogen fixation mediated by lanthanum hydride

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

Journal of Energy Chemistry 2022年第9期31卷 1-7,I0001页

作者： Hanxue Yan Wenbo Gao Jirong Cui weijin zhang Qijun Pei Qianru Wang Yeqin Guan Sheng Feng Han Wu Hujun Cao Jianping Guo Ping Chen Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China

Dinitrogen fixation is one of the key reactions in chemistry, which is closely associated with food, environment, and energy. It has been recently recognized that the hydride materials containing negatively charged hydrogen(H~-) show promises for Nfixation and hydrogenation to ammonia. Herein, we report that rare earth metal hydrides such as lanthanum hydride can also fix Neither by heating to 200 °C or ball milling under ambient Npressure and temperature. The Nfixation by lanthanum hydride may proceed via an intermediate lanthanum hydride-nitride(La-H-N) structure to form the final lanthanum nitride product. The hydride ion functions as an electron donor, which provides electrons for Nactivation possibly mediated by the lanthanum atoms. It is observed that N–H bond is not formed during the Nfixation process, which is distinctly different from the alkali or alkaline earth metal hydrides. The hydrolysis of La-H-N to ammonia is feasible using water as the hydrogen source. These results provide new insights into the nitrogen fixation by hydride materials and more efforts are needed for the development of rare earth metal-based catalysts and/or nitrogen carriers for ammonia synthesis processes.

关键词： Hydride Lanthanum hydride Nitrogen fixation Lanthanum hydride-nitride Rare earth metal hydride

The Estimation of the Higher Heating Value of Biochar by Data-Driven Modeling

在线全文

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2022年第6期10卷 1555-1574页

作者： Jiefeng Chen Lisha Ding Pengyu Wang weijin zhang Jie Li Badr A.Mohamed Jie Chen Songqi Leng Tonggui Liu Lijian Leng Wenguang Zhou Key Laboratory of Poyang Lake Environment and Resource Utilization Ministry of Education and School of ResourcesEnvironmental&Chemical EngineeringNanchang UniversityNanchangChina School of Energy Science and Engineering Central South UniversityChangshaChina Department of Chemical and Biomolecular Engineering National University of SingaporeSingapore Department of Agricultural Engineering Cairo UniversityGizaEgypt

Biomass is a carbon-neutral renewable energy *** produced from biomass pyrolysis exhibits preferable characteristics and potential for fossil fuel *** time-and cost-saving,it is vital to establish predictive models to predict biochar ***,limited studies focused on the accurate prediction of HHV of biochar by using proximate and ultimate analysis results of various ***,the multi-linear regression(MLR)and the machine learning(ML)models were developed to predict the measured HHV of biochar from the experiment data of this *** detail,52 types of biochars were produced by pyrolysis from rice straw,pig manure,soybean straw,wood sawdust,sewage sludge,Chlorella Vulgaris,and their mixtures at the temperature ranging from 300 to 800℃.The results showed that the co-pyrolysis of the mixed biomass provided an alternative method to increase the yield of biochar *** contents of ash,fixed carbon(FC),and C increased as the incremental pyrolysis temperature for most *** Pearson correlation(r)and relative importance analysis between HHV values and the indicators derived from the proximate and ultimate analysis were carried out,and the measured HHV was used to train and test the MLR and the ML ***,ML algorithms,including gradient boosted regression,random forest,and support vector machine,were also employed to develop more widely applicable models for predicting HHV of biochar from an expanded dataset(total 149 data points,including 97 data collected from the published literature).Results showed HHV had strong correlations(|r|>0.9,p*** ML models showed better performance with test R^(2)around 0.95(random forest)and 0.97–0.98 before and after adding extra data for model construction,*** importance analysis of the ML models showed th

关键词： Biochar higher heating value machine learning prediction proximate analysis ultimate analysis

Machine learning predicting and engineering the yield,N content,and specific surface area of biochar derived from pyrolysis of biomass

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

Biochar 2022年第1期4卷 134-151页

作者： Lijian Leng Lihong Yang Xinni Lei weijin zhang Zejian Ai Zequn Yang Hao Zhan Jianping Yang Xingzhong Yuan Haoyi Peng Hailong Li School of Energy Science and Engineering Central South UniversityChangsha 410083HunanPeople’s Republic of China. College of Environmental Science and Engineering Hunan UniversityChangsha 410083HunanPeople’s Republic of China

Biochar produced from pyrolysis of biomass has been developed as a platform carbonaceous material that can be used in various *** specific surface area(SSA)and functionalities such as N-containing functional groups of biochar are the most significant properties determining the application performance of biochar as a carbon material in various areas,such as removal of pollutants,adsorption of CO_(2)and H2,catalysis,and energy *** biochar with preferable SSA and N functional groups is among the frontiers to engineer biochar *** study attempted to build machine learning models to predict and optimize specific surface area of biochar(SSA-char),N content of biochar(N-char),and yield of biochar(Yield-char)individually or simultaneously,by using elemental,proximate,and biochemical compositions of biomass and pyrolysis conditions as input *** predictions of Yield-char,N-char,and SSA-char were compared by using random forest(RF)and gradient boosting regression(GBR)*** outperformed RF for most *** input parameters included elemental and proximate compositions as well as pyrolysis conditions,the test R^(2) values for the single-target and multi-target GBR models were 0.90-0.95 except for the two-target prediction of Yield-char and SSA-char which had a test R^(2) of 0.84 and the three-target prediction model which had a test R^(2) of *** indicated by the Pearson correlation coefficient between variables and the feature importance of these GBR models,the top influencing factors toward predicting three targets were specified as follows:pyrolysis temperature,residence time,and fixed carbon for Yield-char;N and ash for N-char;ash and pyrolysis temperature for *** effects of these parameters on three targets were different,but the trade-offs of these three were balanced during multi-target ML prediction and *** optimum solutions were then experimentally verified,which opens a new way for de

关键词： Specific surface area Nitrogen Biochar Pyrolysis Machine learning

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

“互联网+”与社会主义核心价值观创新传播

学术前沿 2020年第13期 112-115页

作者：张唯锦东南大学人文学院

社会主义核心价值观的培育和践行关乎未来社会良性发展之路。"互联网+"的浪潮使得当今时代的主流价值理念传播面临更多的机遇和挑战。在互联网囊括日常生活的当今,怎样在互联网带来的娱乐泛化与信息传播去中心化中寻找社会主义核心价值... 详细信息

社会主义核心价值观的培育和践行关乎未来社会良性发展之路。"互联网+"的浪潮使得当今时代的主流价值理念传播面临更多的机遇和挑战。在互联网囊括日常生活的当今,怎样在互联网带来的娱乐泛化与信息传播去中心化中寻找社会主义核心价值观的最佳传播路径,值得我们在认识和利用互联网的过程中重点关注。

关键词： “互联网+” 社会主义核心价值观新媒体传播

党的十八大以来党内问责制的实践逻辑及现实优化进路

在线全文

学校读者我要写书评

暂无评论

重庆理工大学学报（社会科学） 2023年第12期37卷 18-25页

作者：张伟进重庆社会科学院马克思主义研究所重庆400020

党内问责工作是健全党和国家监督体系的重要组成,是健全全面从严治党体系的重要举措,也是健全党的自我革命制度规范体系的重要内容。回顾党的十八大以来党内问责制的实践历程,以习近平同志为核心的党中央高度重视党内问责制,将其作为全... 详细信息

党内问责工作是健全党和国家监督体系的重要组成,是健全全面从严治党体系的重要举措,也是健全党的自我革命制度规范体系的重要内容。回顾党的十八大以来党内问责制的实践历程,以习近平同志为核心的党中央高度重视党内问责制,将其作为全面从严治党的利器,坚持以人民为中心的价值取向,高度重视科学的顶层设计,牵住主体责任的“牛鼻子”,重点抓好“关键少数”,注重“惩前毖后,治病救人”,推动党内问责实践不断发展。基于深入推进新时代党的建设新的伟大工程,优化党内问责制度势在必行,其现实进路是:重点加强党的集中统一领导,提高思想认识,完善制度体系,强化制度落实。

关键词：党的建设党内问责制全面从严治党党内监督自我革命