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In situ generated layered NiFe-LDH/MOF heterostructure nanosheet arrays with abundant defects for efficient alkaline and seawater oxidation

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Nano Research 2023年第7期16卷 8945-8952页

作者： Manjie Xiao Can Wu Jiawei Zhu chengtian zhang Yan Li Jiahui Lyu Weihao Zeng Haiwen Li Lei Chen Shichun Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory Foshan 528200China Science and Technology Institute of Advanced Technology Wuhan 430051China Hefei General Machinery Research Institute Hefei 230031China

As the main limiting step of overall water splitting,oxygen evolution reaction(OER)is urgent to be enhanced by developing efficient catalysts to promote the process of electrolytic water.Based on theoretical analysis,the Ni-metal-organic framework(Ni-MOF)and NiFe-layered double hydroxide(NiFe-LDH)(NiFe-LDH/MOF)heterostructure can optimize the energy barrier of the OER process and decrease the adsorption energy of oxygen-containing intermediates,effectively accelerating the OER kinetics.Accordingly,layered NiFe-LDH/MOF heterostructures are in situ constructed through a facile two-step reaction process,with substantial oxygen defects and lattice defects that further improve the catalytic performance.As a result,only 208 and 275 mV OER overpotentials are needed for NiFe-LDH/MOF to drive the current densities of 20 and 100 mA·cm^(-2)in 1 M KOH solutions,and even maintain catalytic stability of 100 h at 20 mA·cm^(-2).When applied to seawater oxidation,only 235 and 307 mV OER overpotentials are required to achieve the current densities of 20 and 100 mA·cm^(-2),respectively,with almost no attenuation for 100 h stability test at 20 mA·cm^(-2),all better than commercial RuO_(2).This work provides the theoretical and experimental basis and a new idea for efficiently driving fresh water and seawater cracking by heterostructure and defect coupling design toward catalysts.

关键词： oxygen evolution reaction defects seawater electrolysis catalyst

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Single-Atom Catalysts for Electrochemical Hydrogen Evolution Reaction: Recent Advances and Future Perspectives

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Nano-Micro Letters 2020年第2期12卷 73-101页

作者： Zonghua Pu Ibrahim Saana Amiinu Ruilin Cheng Pengyan Wang chengtian zhang Shichun Mu Weiyue Zhao Fengmei Su Gaixia zhang Shijun Liao Shuhui Sun Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications VarennesQC J3X 1S2Canada State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China The Key Laboratory of Fuel Cell Technology of Guangdong Province The Key Laboratory of New Energy Technology of Guangdong UniversitiesSchool of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510641People’s Republic of China Key Laboratory of Materials Processing and Mold Ministry of EducationZhengzhou UniversityZhengzhou 450002People’s Republic of China

Hydrogen,a renewable and outstanding energy carrier with zero carbon dioxide emission,is regarded as the best alternative to fossil fuels.The most preferred route to large-scale production of hydrogen is by water electrolysis from the intermittent sources(e.g.,wind,solar,hydro,and tidal energy).However,the efficiency of water electrolysis is very much dependent on the activity of electrocatalysts.Thus,designing high-effective,stable,and cheap materials for hydrogen evolution reaction(HER)could have a substantial impact on renewable energy technologies.Recently,single-atom catalysts(SACs)have emerged as a new frontier in catalysis science,because SACs have maximum atom-utilization efficiency and excellent catalytic reaction activity.Various synthesis methods and analytical techniques have been adopted to prepare and characterize these SACs.In this review,we discuss recent progress on SACs synthesis,characterization methods,and their catalytic applications.Particularly,we highlight their unique electrochemical characteristics toward HER.Finally,the current key challenges in SACs for HER are pointed out and some potential directions are proposed as well.

关键词： Single-atom catalysts Nanomaterials Electrocatalyst Hydrogen evolution reaction Electrochemical energy conversion

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ZIF-8/LiFePO4 derived Fe-N-P Co-doped carbon nanotube encapsulated Fe2P nanoparticles for efficient oxygen reduction and Zn-air batteries

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Nano Research 2020年第3期13卷 818-823页

作者： Huihui Jin Huang Zhou Pengxia Ji chengtian zhang Jiahuan Luo Weihao Zeng Chenxi Hu Daping He Shichun Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hubei Engineering Research Center of RF-Microwave Technology and Application Wuhan University of TechnologyWuhan 430070China Department of Chemical and Environmental Engineering Anyang Institute of TechnologyAnyang 455000China

Iron-based oxygen reduction reaction(ORR)catalysts have been the focus of research,and iron sources play an important role for the preparation of efficient ORR catalysts.Here,we successfully use LiFePO4 as ideal sources of Fe and P to construct the heteroatom doped Fe-based carbon materials.The obtained Fe-N-P co-doped coral-like carbon nanotube arrays encapsulated Fe2P catalyst(C-ZIF/LFP)shows very high half-wave potential of 0.88 V in alkaline electrolytes toward ORR,superior to Pt/C(0.85 V),and also presents a high half-wave potential of 0.74 V in acidic electrolytes,comparable to Pt/C(0.8 V).When further applied into a home-made Zn-air battery as cathode,a peak power density of 140 mW·cm^-2 is reached,exceeds commercial Pt/C(110 mW·cm^-2).Besides,it also presents exceptional durability and methanol resistance compared with Pt/C.Noticeably,the preparation method of such a high-performance catalyst is simple and easy to optimize,suitable for the large-scale production.What’s more,it opens up a more sustainable development scenario to reduce the hazardous wastes such as LiFePO4 by directly using them for preparing high-performance ORR catalysts.

关键词： LiFePO4 waste utilization ZIF-8 heteroatoms-doped oxygen reduction reaction

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基于EMD的锅炉燃烧系统自适应动态模型优化研究

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粘接 2024年第1期51卷 117-120页

作者：辛超孙成田张效源孙凯孙凯进国家能源费县发电有限公司山东费县276001 东南大学江苏南京210096

锅炉燃烧系统的建模是实现锅炉节能减排的基础,为实现燃煤锅炉节能减排,针对现有建模方法多步预测精度不足问题,采用经验模态分解算法把复杂的输出信号转化为多个具有周期性规律或趋势相对平稳的模态信号,降低数据复杂度,基于K近邻联合... 详细信息

锅炉燃烧系统的建模是实现锅炉节能减排的基础,为实现燃煤锅炉节能减排,针对现有建模方法多步预测精度不足问题,采用经验模态分解算法把复杂的输出信号转化为多个具有周期性规律或趋势相对平稳的模态信号,降低数据复杂度,基于K近邻联合互信息法得出迟延时间,提出基于动态时间规整距离进行在线更新的最小二乘支持向量机算法,并进行锅炉燃烧系统的建模,基于锅炉实际运行数据的仿真结果表明,该方法可以有效提高模型的自适应能力和多步预测精度,为后续实现闭环燃烧优化控制打下了良好基础。

关键词：锅炉燃烧系统经验模态分解算法 K近邻联合互信息最小二乘支持向量机

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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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Zebrafish as a Model for Human Ciliopathies

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Journal of Genetics and Genomics 2016年第3期43卷 107-120页

作者： Zhu Song Xiaoli zhang Shuo Jia Pamela C.Yelick chengtian Zhao Institute of Evolution & Marine Biodiversity College of Marine Life Science Ocean University of China Department of Orthodontics Division of Craniofacial and Molecular Genetics Tufts University Laboratory for Marine Biology and Biotechnology Qingdao National Laboratory for Marine Science and Technology

Cilia, microtubule-based structures found on the surface of almost all vertebrate cells, play an array of diverse biological functions. Abnormal ciliary axonemal structure and function can result in a class of genetic disorders that are collectively termed ciliopathies. Model organisms, including Chlamydomonas reinhardtii and Caenorhabditis elegans have been widely used to study the complex genetic basis of ciliopathies. Here, we review the advantages of the zebrafish as a vertebrate model for human ciliopathies. We summarize the features of zebrafish cilia, and the major findings and contributions of the zebrafish model in recent studies of human ciliopathies. We also discuss the new genome editing approaches being efficiently used in zebrafish, and the exciting prospects of these approaches in modeling human ciliopathies.

关键词： Cilia Zebrafish Ciliopathy Disease model

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Somite-specific expression of a novel fibronectin variant FN3 is negatively regulated by SHH

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Chinese Science Bulletin 2002年第21期47卷 1807-1811,1850页

作者： ZHAO chengtian zhang Yu SU Ying MENG Anming Department of Biological Science and Biotechnology The Protein Science Laboratory of the Ministry of EducationTsinghua UniversityBeijing 100084China

Fibronectins (FNs) are major extracellular proteins in blood plasma and many tissues of vertebrates, and play important roles in adhesion, migration and differentiation of cells. We have identified a novel variant (FN3) of fibronectin in zebrafish. FN3 mRNA is abundant, as detected by whole-mount in situ hybridization, in the presomitic mesoderm and the newly formed somites, but less abundant in mature somites. Ectopic expression of Sonic Hedgehog (SHH) results in a decrease of FN3 expression, whereas the expression level of FN3 increases in the flhi mutants that lack the notochord. Our results suggest that FN3 may be involved in the formation of somites, but during somite differentiation its expression needs to be downregulated by signals derived from the axial tissues.

关键词： zebrafish fibronectin somite somitogenesis extracellu-lar matrix SHH flh.

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Influence of Orifice Position Deviations on Distribution Performance of Gravity-Type Liquid Distributor Analyzed Through Mathematical Pathway

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Transactions of Tianjin University 2018年第2期24卷 152-159页

作者： Jinsheng Sun Zhiwei zhang chengtian Cui Tianpei Li Sheng Fu School of Chemical Engineering and Technology Tianjin University

The distribution performance of the gravity-type liquid distributor(GTLD) significantly affects column operation efficiency and the consequent product quality. In industrial settings, maldistribution is normally considered to be caused by vertical positional or coplanarity errors stemming from deflections associated with manufacture and installation, or even by excessive weight. The lack ofestimation protocols or standards impedes the description ofthis error, which influences the corresponding outflow rates. Given this situation, the paper proposes a lumped parameter, orifice position deviation(OPD), to facilitate the calculation of the relative discharge rate error(RDRE)based on a formula derivation, which allows the systematic analysis of the influence ofa single orifice or weir OPD.The paper introduces a sensitivity factor K as a concise and unified expression in theoretical RDREs for calibrating the influence of OPD on the RDREs ofgeometrically different orifices and weirs. With respect to the GTLD, a larger K indicates the need for more strict OPD requirements. The paper verifies that the extent of GTLD outflow nonuniformity is associated with diverging tendencies regarding its morphology, especially in the orifice and weir, which can be determined using our proposed procedures.

关键词： Liquid distributor Installation Orifice position deviation Relative discharge rate error Sensitivity factor

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再论澶渊之盟

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中州学刊 2024年第1期 125-132页

作者：张希清北京大学历史学系北京100089 北京大学中国古代史研究中心北京100089

北宋景德元年,辽承天太后与圣宗率大军20万南下攻宋,同时命宋降将王继忠致书宋真宗,表示“愿修旧好”。辽军围攻瀛州失败后,绕过大名府,兵临澶州城下。宋真宗亲征至澶州,登上北城门楼,宋军皆呼万岁,气势百倍。辽南京统军使萧挞览(凛)率... 详细信息

北宋景德元年,辽承天太后与圣宗率大军20万南下攻宋,同时命宋降将王继忠致书宋真宗,表示“愿修旧好”。辽军围攻瀛州失败后,绕过大名府,兵临澶州城下。宋真宗亲征至澶州,登上北城门楼,宋军皆呼万岁,气势百倍。辽南京统军使萧挞览(凛)率军攻澶州北城,被宋军伏弩射死,辽军士气大挫。宋辽和议使节经过多次往返,终于订立澶渊之盟。双方相约为“兄弟之国”;“沿边州军,各守疆界”;宋朝岁遗辽朝“绢二十万匹、银一十万两”,作为“助军旅之费”。澶渊之盟结束了长达25年的宋辽战争局面,维持了此后将近120年的和平友好往来,对宋辽双方的社会稳定、经济发展、文化繁荣以及中华民族的融合与发展都起到了重要作用,对当代各民族的平等、团结、互助、和谐也具有借鉴和启迪意义。

关键词：宋真宗兄弟之国寇准澶渊之盟

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Biodiversity-based development and evolution:the emerging research systems in model and non-model organisms

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Science China(Life Sciences) 2021年第8期64卷 1236-1280页

作者： Long Zhao Feng Gao Shan Gao Yujun Liang Hongan Long Zhiyi Lv Ying Su Naihao Ye Liusuo zhang chengtian Zhao Xiaoyu Wang Weibo Song Shicui zhang Bo Dong Institute of Evolution and Marine Biodiversity(IEMB) Ocean University of ChinaQingdao 266003China Laboratory for Marine Biology and Biotechnology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China College of Fisheries Ocean University of ChinaQingdao 266003China College of Marine Life Sciences Ocean University of ChinaQingdao 266003China Yellow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdao 266071China CAS Key Laboratory of Experimental Marine Biology Institute of OceanologyChinese Academy of SciencesQingdao 266071China

Evolutionary developmental biology,or Evo-Devo for short,has become an established field that,broadly speaking,seeks to understand how changes in development drive major transitions and innovation in organismal evolution.It does so via integrating the principles and methods of many subdisciplines of biology.Although we have gained unprecedented knowledge from the studies on model organisms in the past decades,many fundamental and crucially essential processes remain a mystery.Considering the tremendous biodiversity of our planet,the current model organisms seem insufficient for us to understand the evolutionary and physiological processes of life and its adaptation to exterior environments.The currently increasing genomic data and the recently available gene-editing tools make it possible to extend our studies to non-model organisms.In this review,we review the recent work on the regulatory signaling of developmental and regeneration processes,environmental adaptation,and evolutionary mechanisms using both the existing model animals such as zebrafish and Drosophila,and the emerging nonstandard model organisms including amphioxus,ascidian,ciliates,single-celled phytoplankton,and marine nematode.In addition,the challenging questions and new directions in these systems are outlined as well.

关键词： Biodiversity evolutionary planet

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