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Numerical simulation of hydrogen diffusion in rubber O-rings containing a cavity defect based on thermomechanical coupling equivalent model

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International Journal of Hydrogen Energy 2024年 139卷 846-853页

作者： Chen, Qi Peng, Wenzhu Yang, Miaomiao Yao, Riwu Hua, Zhengli Zheng, Jinyang Shi, Jianfeng Institute of Process Equipment College of Energy Engineering Zhejiang University Hangzhou China College of Mechanical Engineering Zhejiang University Hangzhou310027 China Hydrogen Energy Institute Zhejiang University Hangzhou China Engineering Research Center of High Pressure Process Equipment and Safety MOE China State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou China

The blister fracture is a typical damage mode of rubber O-rings under high-pressure hydrogen environments, which are both affected by hydrogen diffusion and pressurization. It is essential to consider the combined effects of large deformation of rubber O-rings under hydrogen pressure and hydrogen-induced expansion on the cavity. Based on the similarity between heat conduction and diffusion equations, a thermomechanical coupling model is developed to simulate the hydrogen diffusion and deformation of rubber O-rings containing a cavity defect. The verification results demonstrate the robustness and reliability of the proposed method. It's found significant changes in the hydrogen concentration and strain field of rubber O-rings, as well as noticeable deformation of the cavity during hydrogen exposure. Meanwhile, the hydrogen diffusion and the deformation of the cavity in rubber O-rings of different materials are comprehensively analyzed. The analysis indicates that a higher diffusion coefficient decreases the possibility of cavity fracture. © 2024 Hydrogen Energy Publications LLC

关键词： Rubber

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Editorial:special topic on biomaterials and bioinspired materials

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Science China Materials 2024年第8期67卷 2373-2375页

作者： Mingjie Liu Xu Hou Dan Wang Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China International Research Institute for Multidisciplinary Science Beihang UniversityBeijing 100191China State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Research Institute for Biomimetics and Soft Matter Fujian Provincial Key Laboratory for Soft Functional Materials ResearchCollege of Physical Science and TechnologyXiamen UniversityXiamen 361005China State Key Laboratory of Biochemical Engineering Key Laboratory of Biopharmaceutical Preparation and DeliveryInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Biomaterials have been persistently focused owing to their intricate design and efficient *** order to satisfy the demands of life and medical sciences,large amounts of biomaterials capable of interacting with living systems have been created,thereby achieving the diagnosis,treatment or replacement of cells,tissues,and *** continuous evolution for billions of years,living organisms have eventually developed sophisticated multi-scale structures with diverse biological functions to adapt to the external environment.

关键词： organs diagnosis biomaterials

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Regulating Oxygen Vacancy Defects in Heterogeneous NiO-CeO_(2)−δ Hollow Multi-shelled Structure for Boosting Oxygen Evolution Reaction

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Chemical Research in Chinese Universities 2024年第3期40卷 475-483页

作者： WANG Huan GONG Guannan SUN Guohua QI Jian YU Ranbo WANG Dan Hebei Key Laboratory of Flexible Functionals Materials School of Materials Science and EngineeringHebei University of Science and TechnologyShijiazhuang 050000P.R.China Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science&Technology BejingBeijing 100083P.R.China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China

CeO_(2) with excellent oxygen storage-exchange capacity and NiO with excellent surface activity were used to construct a heterogeneous NiO-CeO_(2)−δhollow multi-shelled structure(HoMS)by spray *** turned out that as the proportion of CeO_(2) increases,the overpotential and Tafel slope of NiO-CeO_(2)−δHoMSs first decreased and then *** is mainly because the construction of the NiO-CeO_(2)−δHoMSs not only increases the specific surface area,but also introduces oxygen vacancy defects,thus improving the interface charge transfer capability of the materials and further improving the oxygen evolution reaction(OER)***,the increase of the calcination temperature will induce the decay of the OER performance of NiO-CeO_(2)−δHoMSs,which is mainly due to the decrease of the specific surface area,the reduction of oxygen vacancy defects,and the weakening of interface charge transfer ***,a series of heterogeneous composite HoMSs,such as Ni/Co,Mo/Ni,Al/Ni and Fe/Ni oxides was successfully constructed by spray drying,which enriched the diversity of HoMSs.

关键词： Heterogeneous composite structure Hollow multishelled structure Oxygen vacancy defect Oxygen evolution reaction

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Opportunities and challenges of interdisciplinarity in river water environmental ethics and integrated river basin management

River

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River 2024年第1期3卷 1-7页

作者： Jun Xia Ying Xue Pengjun Li Jiyun Song Gangsheng Wang Wenguang Luo State Key Laboratory of Water Resources Engineering and Management/Research Institute for Water Security(RIWS) Wuhan UniversityWuhanChina Key Laboratory of Water Cycle and Related Land Surface Process Institute of Geographic Sciences and Nature Resources ResearchChinese Academy of SciencesBeijingChina

This paper examines the ethical issues of water environment in the context of river management in practical engineering and technological *** particular,three important issues are discussed in this paper referring to two actual engineering cases in ancient and modern China,that is,the construction of ancient Dujiangyan irrigation project in Sichuan,China,and the modern practice of integrated operation of flood control and pollution prevention in Huai River *** three issues include how to consider the trade-offs between flood control and irrigation,how to balance flood control and contamination prevention related to sudden water pollution incident,and how to ensure the protection of water environments and ecology in rivers under the grand challenges of natural environmental changes and high-intensity human ***,this paper concludes by emphasizing the future development of water environmental ethics and its interdisciplinary integration with modern science&technology in smart river management in China.

关键词： environmental ethics interdisciplinary science and technology smart river management

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Anchoring nitrogen-doped Co_(2)P nanoflakes on NiCo_(2)O_(4)nanorod arrays over nickel foam as high-performance 3D electrode for alkaline hydrogen evolution

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Green Energy & Environment 2023年第2期8卷 470-477页

作者： Xiaohao Ji Xiaoyu Chen Lijuan Zhang Cheng Meng Yilei He Xing Zhang Zumin Wang Ranbo Yu Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing100083China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of Sciences1 North 2nd StreetZhongguancunHaidian DistrictBeijing100190China

Effective and robust electrocatalysts are mainly based on innovative materials and unique ***,we designed a flakelike cobalt phosphide-based catalyst supporting on NiCo_(2)O_(4)nanorods array,which in-situ grew on the nickel foam(NF)current collector,referring as NCo_(2)P/NiCo_(2)O_(4)/NF *** optimizing the microstructure and electronic structure through 3D hierarchy fabrication and nitrogen doping,the catalyst features with abundant electrochemical surface area,favorable surface wettability,excellent electron transport,as well as tailored d band ***,the as-prepared N-Co_(2)P/NiCo_(2)O_(4)/NF electrode exhibits an impressive HER activity with a low overpotentials of58 mV at 10 mA cm^(-2),a Tafel slop of 75 mV dec^(-1),as well as superior durability in alkaline *** work may provide a new pathway to effectively improve the hydrogen evolution performance of transition metal phosphides and to develop promising electrodes for practical electrocatalysis.

关键词： Hydrogen evolution reaction(HER) Cobalt phosphide Nonprecious electrocatalyst Hierarchal structure Nitrogen doping

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Advances and challenges of electrolyzers for large-scale CO_(2) electroreduction

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Materials Reports(Energy) 2023年第1期3卷 1-18,I0002页

作者： Lei Yuan Shaojuan Zeng Xiangping Zhang Xiaoyan Ji Suojiang Zhang Beijing Key Laboratory of Ionic Liquids Clean Process State Key Laboratory of Resource and Low Carbon ProcessInstitute of Process EngineeringInnovation Academy for Green Manufacture InstituteChinese Academy of SciencesBeijing100190China College of Chemical Engineering Zhengzhou UniversityZhengzhou450001China Longzihu New Energy Laboratory Zhengzhou Institute of Emerging Industrial TechnologyHenan UniversityZhengzhou450000China Division of Energy Science/Energy Engineering Department of Engineering Sciences and MathematicsLuleåUniversity of TechnologyLuleå97187Sweden

CO_(2) electroreduction(CO_(2) ER)to high value-added chemicals is considered as a promising technology to achieve sustainable carbon *** virtue of the progressive research in recent years aiming at design and understanding of catalytic materials and electrolyte systems,the CO_(2) ER performance(such as current density,selectivity,stability,CO_(2) conversion,etc.)has been continually ***,there has been relatively little attention paid to the large-scale CO 2 electrolyzers,which stand just as one obstacle,alongside series-parallel integration,challenging the practical application of this infant *** this review,the latest progress on the structures of low-temperature CO_(2) electrolyzers and scale-up studies was systematically *** influence of the CO_(2) electrolyzer configurations,such as the flow channel design,gas diffusion electrode(GDE)and ion exchange membrane(IEM),on the CO_(2) ER performance was further *** review could provide inspiration for the design of large-scale CO_(2) electrolyzers so as to accelerate the industrial application of CO_(2) ER technology.

关键词： CO_(2) electroreduction Large-scale CO_(2) electrolyzer Flow channel Gas diffusion electrode Ion exchange membrane

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Ti_(3)C_(2)T_(x) MXene/carbon composites for advanced supercapacitors:Synthesis,progress,and perspectives

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Carbon Energy 2024年第2期6卷 113-142页

作者： Yanqing Cai Xinggang Chen Ying Xu Yalin Zhang Huijun Liu Hongjuan Zhang Jing Tang College of Materials Science and Engineering North China University of Science and TechnologyTangshanChina Hebei Iron and Steel Laboratory North China University of Science and TechnologyTangshanChina Songshan Lake Materials Laboratory DongguanChina Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghaiChina State Key Laboratory of Petroleum Molecular and Process Engineering(SKLPMPE) Sinopec Research Institute of Petroleum Processing Co.Ltd.BeijingChina Institute of Eco-Chongming ShanghaiChina

MXenes are a family of two-dimensional(2D)layered transition metal carbides/nitrides that show promising potential for energy storage applications due to their high-specific surface areas,excellent electron conductivity,good hydrophilicity,and tunable *** various types of MXenes,Ti_(3)C_(2)T_(x) is the most widely studied for use in capacitive energy storage applications,especially in supercapacitors(SCs).However,the stacking and oxidation of MXene sheets inevitably lead to a significant loss of electrochemically active *** overcome such challenges,carbon materials are frequently incorporated into MXenes to enhance their electrochemical *** review introduces the common strategies used for synthesizing Ti_(3)C_(2)T_(x),followed by a comprehensive overview of recent developments in Ti_(3)C_(2)T_(x)/carbon composites as electrode materials for ***_(3)C_(2)T_(x)/carbon composites are categorized based on the dimensions of carbons,including 0D carbon dots,1D carbon nanotubes and fibers,2D graphene,and 3D carbon materials(activated carbon,polymer-derived carbon,etc.).Finally,this review also provides a perspective on developing novel MXenes/carbon composites as electrodes for application in SCs.

关键词： electrochemical performance MXene/carbon composites supercapacitors

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Constructing mesoporous CeO_(2)single-crystal particles in ionic liquids for enhancing the conversion of CO_(2)and alcohols to carbonates

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Chinese Journal of Catalysis 2024年第11期66卷 152-167页

作者： Jielin Huang Jie Wang Haonan Duan Songsong Chen Junping Zhang Li Dong Xiangping Zhang School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Mesoscience and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Longzihu New Energy Laboratory Zhengzhou Institute of Emerging Industrial TechnologyHenan UniversityZhengzhou 450000HenanChina

Catalysts for CO_(2)value-added conversion have been extensively explored,but there is still a lack of systematic design for catalysts that achieve efficient CO_(2)conversion under mild ***,we explored a mesoporous CeO_(2)single-crystal formed with the regulation of ionic liquids,which catalyzed the effective carbonylation reaction with CO_(2)under mild reaction *** altering the synthetic environment,a series of uniform mesoporous CeO_(2)particles with atomically aligned single-crystal frameworks were constructed,which have different surface physicochemical properties and primary aggregation *** prepared mesoporous CeO_(2)single-crystal achieved efficient activation of CO_(2)and alcohols at 0.5 MPa CO_(2)and 100℃,and the CeO_(2)-IL-M catalyst shows optimal catalytic performance in the synthesis of ethylene carbonate with 46.22 mmol g^(–1)h^(–1),which was 50.6 times as high as that of the CeO_(2)obtained without ionic ***,the catalytic pathway and mechanism of carbonylation reaction with CO_(2)on mesoporous CeO_(2)single-crystal were studied via React-IR spectra and C18O_(2)labeling *** research provides a new strategy for controllable nanoscale assembly of mesoporous single-crystal materials and expands the application range of single-crystal materials,aiming to develop novel catalytic materials to meet industrial needs.

关键词： Cerium dioxide Ionic liquid Single-crystal material Surface oxygen vacancy Carbonylation reaction

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Structure deformation of Ni-Fe-Se enables efficient oxygen evolution via RE atoms doping

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Rare Metals 2025年第1期44卷 336-348页

作者： Hong-Rui Zhao Cheng-Zong Yuan Cong-Hui Li Wen-Kai Zhao Fu-Ling Wu Lei Xin Hong Yin Shu-Feng Ye Xiao-Meng Zhang Yun-Fa Chen Jiangxi Province Research Institute of Rare Earths Ganjiang Innovation AcademyChinese Academy of SciencesGanzhou341119China School of Rare Earths University of Science and Technology of ChinaHefei230026China Key Laboratory of Hunan Province for Advanced Carbon-Based Functional Materials School of Chemistry and Chemical EngineeringHunan Institute of Science and TechnologyYueyang414006China State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing100190China

The development of cost-effective and highly stable electrocatalysts for oxygen evolution reactions holds paramount importance in practical hydrogen ***,we present a novel self-supported electrode comprising Ce-doped Ni-Fe-Se nanosheets grown on carbon cloth(Ni-Fe-Ce-Se/CC).This electrode was synthesized through a selenylation process,utilizing Ni-Fe-Ce-layered double hydroxide/carbon cloth(Ni-Fe-Ce LDH/CC)as the ***,Ni-Fe-Ce-Se/CC electrode demonstrates remarkable performance,requiring a low overpotential of 300 mV to attain a current density of 100 mA·cm^(-2)under harsh alkaline ***,the electrode exhibits exceptional stability during continuous operation for 100 *** into the underlying mechanisms was gained through a combination of experimental results and density functional theory *** findings reveal that Ce doping induces crystal structure deformation in Ni-Fe-Se and enhances electron enrichment around Ni *** structural modification optimizes the adsorption energy of oxygen-based intermediates on the Ni-Fe-Se *** work offers a valuable strategy for regulating the electron transfer and adsorption capabilities of transition metal selenide electrocatalysts through RE atoms doping,opening new avenues for enhanced electrocatalytic performance.

关键词： Ce doping Structure deformation Ni-Fe-Se Electron transfer Oxygen evolution

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Simultaneous Degradation, Dehalogenation, and Detoxification of Halogenated Antibiotics by Carbon Dioxide Radical Anions

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engineering 2024年第6期37卷 78-86页

作者： Yanzhou Ding Xia Yu Shuguang Lyu Huajun Zhen Wentao Zhao Cheng Peng Jiaxi Wang Yiwen Zhu Chengfei Zhu Lei Zhou Qian Sui State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental EngineeringEast China University of Science and TechnologyShanghai 200237China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Academy of Environmental Sciences Shanghai 200233China

Despite the extensive application of advanced oxidation processes(AOPs)in water treatment,the efficiency of AOPs in eliminating various emerging contaminants such as halogenated antibiotics is constrained by a number of *** moieties exhibit strong resistance to oxidative radicals,affecting the dehalogenation and detoxification *** address these limitations of AOPs,advanced reduction processes(ARPs)have been ***,a novel nucleophilic reductant—namely,the carbon dioxide radical anion(CO_(2)^(·-))—is introduced for the simultaneous degradation,dehalogenation,and detoxification of florfenicol(FF),a typical halogenated *** results demonstrate that FF is completely eliminated by CO_(2)^(·-),with approximately 100%of Cland 46%of Freleased after 120 min of *** detoxification is observed,which exhibits a linear response to the release of free inorganic halogen ions(R^(2)=0.97,p<0.01).The formation of halogen-free products is the primary reason for the superior detoxification performance of this method,in comparison with conventional hydroxyl-radical-based *** identification and density functional theory(DFT)calculations reveal the underlying dehalogenation mechanism,in which the chlorine moiety of FF is more susceptible than other moieties to nucleophilic attack by CO_(2)^(·-).Moreover,CO_(2)^(·-)-based ARPs exhibit superior dehalogenation efficiencies(>75%)in degrading a series of halogenated antibiotics,including chloramphenicol(CAP),thiamphenicol(THA),diclofenac(DLF),triclosan(TCS),and ciprofloxacin(CIP).The system shows high tolerance to the pH of the solution and the presence of natural water constituents,and demonstrates an excellent degradation performance in actual groundwater,indicating the strong application potential of CO_(2)^(·-)-based ARPs in real ***,this study elucidates the feasibility of CO_(2)^(·-)for the simultaneous degradation,dehalogenation,and detoxification of halog

关键词： Carbon dioxide radical anions Advanced reduction processes Halogenated antibiotics Dehalogenation Detoxification

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