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Earth abundant spinel for hydrogen production in a chemical looping scheme at 550℃

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Green Energy & Environment 2021年第5期6卷 780-789页

作者： Yu Qiu Li Ma Qingfeng Kong Min Li dongxu cui Shuai Zhang Dewang Zeng Rui Xiao Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing210096China

Operating chemical looping process at mid-temperatures(550–750℃)presents exciting potential for the stable production of ***,the reactivity of oxygen carriers is compromised by the detrimental effect of the relatively low temperatures on the redox *** the reactivity at mid-temperature can be improved by the addition of noble metals,the high cost of these noble metal containing materials significantly hindered their scalable *** the current work,we propose to incorporate earth-abundant metals into the ironbased spinel for hydrogen production in a chemical looping scheme at ***0.2Co0.4Fe2.4O4 shows a high hydrogen production performance at the average rate of~0.62 mmol g^(-1) min^(-1) and a hydrogen yield of~9.29 mmol g^(-1) with satisfactory stability over 20 cycles at 550℃.The mechanism studies manifest that the enhanced hydrogen production performance is a result of the improved oxygen-ion conductivity to enhance reduction reaction and high reactivity of reduced samples with *** performance of the oxygen carriers in this work is comparable to those noble-metal containing materials,enabling their potential for industrial applications.

关键词： Chemical looping Mid-temperature Earth-abundant metals Spinel Hydrogen production

Three dimensional microstructures of carbon deposition on Ni-YSZ anodes under polarization

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Journal of Energy Chemistry 2023年第12期87卷 359-367,I0010页

作者： dongxu cui Anna Sciazko Yosuke Komatsu Akiko Nakamura Toru Hara Shiliang Wu Rui Xiao Naoki Shikazono Institute of Industrial Science The University of TokyoTokyo 153-8505Japan Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210018JiangsuChina National Institute for Materials Science Tsukuba 305-0047Japan

In the present study,two Ni/YSZ anodes with different volume ratios of Ni and YSZ,30:70 and 45:55 vol%,are operated in dry methane under open circuit and polarized ***-dimensional(3D)Ni/YSZ microstructures after carbon deposition are reconstructed by the focused ion beam-scanning electron microscopy(FIB-SEM)with the help of machine learning *** the reconstructed mircostructures,volume fraction,connectivity,three phase boundary(TPB)density,and tortuosity are *** addition,local carbon microstructures are quantitatively reconstructed,and the effect of polarization on carbon morphology is *** is demonstrated that Ni surface in the vicinity of active TPB near the electrolyte is free from carbon formation,while remaining Ni surface at some distances from TPB exhibits severe carbon *** average,total amount of carbon deposition is larger near the *** observations imply complex interplay between the electrochemical steam generation and methane cracking on Ni surface which take place very locally near the active TPB.

关键词： Solid oxide fuel cell Anode Carbon deposition Triple-phase boundary 3D reconstruction

Efficient CO2 to CO conversion at moderate temperatures enabled by the cobalt and copper co-doped ferrite oxygen carrier

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Journal of Energy Chemistry 2020年第7期29卷 123-132,I0005页

作者： Yu Qiu Li Ma Dewang Zeng Min Li dongxu cui Yulin Lv Shuai Zhang Rui Xiao Key Laboratory of Energy Thermal conversion and control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210096JiangsuChina

Chemical looping technology holds great potential on efficient CO2 splitting with much higher CO production and CO2 splitting rate than photocatalytic *** oxygen carrier requires high temperature(typically 850–1000°C)to ensure sufficient redox activity,but the stable and high CO2 conversion is favored at a lower temperature,leading to the degrading on the reaction kinetics as well as the low CO production and CO2 splitting *** this paper,we prepared several ternary spinels and demonstrated their performance for chemical looping CO2 splitting at moderate *** the promotion effect of Cu to cobalt ferrite reduction and reversible phase change of the reduced metals,Cu0.4 Co0.6 Fe2 O4 exhibits high CO2 splitting rate(144.6μmol g–1 min–1)and total CO production(9100μmol g–1)at 650°*** high performance of this earth-abundant spinel material is also consistent in repeated redox cycles,enabling their potential in industrial use.

关键词： Chemical looping Oxygen carrier CO2 splitting Ferrite

Axially Chiral Dodecanuclear Lanthanide Clusters Constructed by“Bottom-Up” Self-assembly for Enantioselective Sensing

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Chinese Journal of Chemistry 2022年第10期40卷 1165-1170页

作者： Honglei Zhao dongxu cui Junning Kou Haijuan Gao Guanghui Yu Chunyi Sun Xinlong Wang Zhongmin Su Key Laboratory of Polyoxometalate Science of Ministry of Education Northeast Normal UniversityChangchunJilin 130024China

Via the bottom-up synthetic strategy,we synthesized a pair of dodecanuclear metal clusters of Eu_(12)(C_(2)O_(4))_(9)(R/S-BNP)_(18)(EtOH)_(6)-(H_(2)0)_(6)·8EtOH-7H_(2)0(complex 2),which represent the largest axial chiral lanthanide metal *** the structure,rare four-pointed star coordination mode of oxalic acid is reported by this *** addition,as a fluorescence sensor,the complex 2 exhibits high enantioselectivity for R-/S-BINOL-TF_(2)(EF=2.87)and other chiral binaphthyl derivatives.

关键词： Axial chirality Cluster compounds Molecular recognition Self-assembly Host-guest systems

Evaluation and Improvement Measures of Rural Human Settlements in Licheng District of Jinan City

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Meteorological and Environmental Research 2018年第2期9卷 39-46页

作者： Zhang Beibei cui dongxu College of Architecture and Urban Planning Shandong Jianzhu University

Based on the data of rural human settlements in Licheng District of Jinan City in 2016,the evaluation system of rural human settlements composed of four subsystems（ social economy,infrastructure,public environment,and construction management） was constructed. According to the comprehensive scores of various administrative villages calculated by means of multi-index comprehensive evaluation method and fuzzy comprehensive evaluation method,the human settlements of 521 administrative villages in Licheng District were divided into four types： excellent,good,average,and poor. Moreover,the spatial differences in the evaluation results of rural human settlements were analyzed using GIS spatial analysis technology. Finally,based on the evaluation results of rural human settlements in Licheng District,some measures to improve and control rural human settlements in different types of villages at various development stages were proposed to fully improve the quality of rural human settlements.

关键词： Rural human settlements Evaluation Indicator system Classification guidance Licheng District

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一种铜铁铝复合载氧体化学链燃烧性能

石油学报（石油加工） 2020年第6期36卷 1200-1205页

作者：崔东旭曾德望肖睿东南大学能源与环境学院江苏南京210096

利用溶胶-凝胶法制备了一种Cu-Fe-Al-O复合载氧体,以CO为还原介质,在固定床反应器上探究了该载氧体的化学链燃烧性能,以及4种还原程度下该载氧体的循环反应稳定性。结果显示:在20次化学链循环反应中,Cu-Fe-Al-O复合载氧体对应的化学链... 详细信息

利用溶胶-凝胶法制备了一种Cu-Fe-Al-O复合载氧体,以CO为还原介质,在固定床反应器上探究了该载氧体的化学链燃烧性能,以及4种还原程度下该载氧体的循环反应稳定性。结果显示:在20次化学链循环反应中,Cu-Fe-Al-O复合载氧体对应的化学链反应中CO 2产率较为稳定,约为4 mmol/g;而对比样品氧化铁在第20次化学链循环时,对应的化学链反应中CO 2产率仅有0.95 mmol/g。进一步实验发现,当还原程度小于75%时,使用Cu-Fe-Al-O载氧体的化学链反应运行稳定,因为在氧化还原过程中,活性组分铜、铁与尖晶石载体存在溶出现象,限制了活性组分的聚集,因此,Cu-Fe-Al-O复合载氧体具有较高的化学链反应循环稳定性。

关键词：化学链燃烧载氧体循环稳定性还原程度

基于健康需求特征的济南居住社区建成环境研究

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城市发展研究 2020年第3期27卷 77-82页

作者：王宏崔东旭济南大学土木建筑学院山东建筑大学建筑城规学院

在推动实施"健康中国战略"的背景下,社区规划与公共健康的相关性研究日益受到关注,居住社区作为健康生活的重要载体,其建成环境对于居民的健康需求尤为关键。通过对济南社区居民健康需求特征的实证调研,深入剖析建成环境与居民健康需求... 详细信息

在推动实施"健康中国战略"的背景下,社区规划与公共健康的相关性研究日益受到关注,居住社区作为健康生活的重要载体,其建成环境对于居民的健康需求尤为关键。通过对济南社区居民健康需求特征的实证调研,深入剖析建成环境与居民健康需求之间存在的差距和问题,作为未来提升社区健康环境的切入点;在此基础上,以生活便捷高效、环境舒适共享、步行安全可达、健康积极诱导等居民健康诉求为目标导向,对社区建成环境的规划影响要素,包括土地利用、设施配套、公共空间、道路格局等方面提出优化策略,以期为微观层面的社区规划提供参考和依据,并为促进城市健康发展提供积极支持。

关键词：居住社区建成环境健康需求规划要素济南市

Data Acquisition and Process Control System of Joint Station

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China Oil & Gas 1994年第4期1卷 48-49页

作者： cui dongxu Li Xiangli Fang Yu and Sun Xingyun(Beijing Spring Electro-mechanical Advanced Technology Company) Beijing Spring Electro-mechanical Advanced Technology Company

The Data Acquisition and Process Control System is a computer system of control and management production process specially designed for joint stations of oil production plants in oil fields.

关键词： Deta acquisition Process control Computer System Oil field Benefit

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聚丙烯腈纤维非晶区的取向结构

高分子材料科学与工程 2014年第11期30卷 54-58页

作者：武帅李婷崔东旭徐木梁华有机无机复合材料国家重点实验室碳纤维及功能高分子教育部重点实验室北京化工大学材料科学与工程学院

基于聚丙烯腈(PAN)纤维中氰基缔合,非晶分子链取向并形成短程有序的堆叠结构,采用X射线衍射仪、声速仪和傅里叶变换红外光谱仪对不同牵伸倍率的PAN纤维的非晶区取向结构进行表征,利用取向因子(fa)和取向相分数(Fa)来研究非晶区取向结构... 详细信息

基于聚丙烯腈(PAN)纤维中氰基缔合,非晶分子链取向并形成短程有序的堆叠结构,采用X射线衍射仪、声速仪和傅里叶变换红外光谱仪对不同牵伸倍率的PAN纤维的非晶区取向结构进行表征,利用取向因子(fa)和取向相分数(Fa)来研究非晶区取向结构,同时提出了PAN纤维非晶区取向结构演变示意图。结果表明,用X射线衍射法所测得的非晶区取向因子与通过声速法计算所得的非晶区取向因子吻合较好,PAN纤维的非晶区取向因子随牵伸倍率的增加而增大,到某一值时增长趋势逐渐变缓;非晶区取向相分数先降低后增加。

关键词：聚丙烯腈纤维非晶区取向取向相分数