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Porous PVA skin-covered thin Zirfon-type separator as a new approach boosting high-rate alkaline water electrolysis beyond 1000 hours’lifespan

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eScience 2024年第6期4卷 127-137页

作者： Xi Luo Nengneng Xu Yongnan Zhou Xiaohui Yang Woochul Yang Guicheng Liu Joong Kee Lee Jinli Qiao State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Environmental Science and EngineeringDonghua UniversityShanghai 201620China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Department of Physics Dongguk UniversitySeoul 04620Republic of Korea School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijing 100096China Dept.of Chemical&Biochemical Eng Gachon University1342 Seongnam-daeroSeongnam-si 13120Republic of Korea

Regulating the pore structure of a zirfon-based diaphragm is critical to promoting a high-rate alkaline electrolyzer,but it is still a big challenge to respond“trade-off”between the thickness of the diaphragm and the current density/gas barrier *** this work,a porous hydrophilic skin layer with~μm thick of polyvinyl alcohol(PVA)has been successfully constructed and casted onto the thin zirfon-type separator composite(V-Zirfon-350μm).The V-Zirfon-350μm separator generates a high KOH uptake(>90%),low area resistance(0.2026Ωcm^(2))but a low electrolyte permeation flux density(5.2×10^(-4) mL cm^(-2) s^(-1) at 0.5 bar),which largely surpasses the state-of-the-art commercial Zirfon UTP-500μm *** coupled with Raney Ni cathode and NiCoMo-LDH anode catalysts,the V-Zirfon-350μm separator offers a high current density over 1300 mA cm^(-2)@2.0 V(80℃ in 30%KOH)and a superior stability of 300 h under 800 mA cm^(-2) for alkaline water electrolysis(AWE).Specifically,the voltage is merely~3.5 V for two electrolytic cells connected in series,which can be even conducted for more than 1300 h at different operational *** work provides a novel methodology for the practical application of a thin Zirfon-based diaphragm.

关键词： Alkaline water electrolysis Porous separator Zirfon type Polyvinyl alcohol Skin layer

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Self-Supported Bifunctional P-Cose/Nf Electrodes for High Efficiency and Durability Hydrogen Production Coupled with Sulfion Valorization

SSRN

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SSRN 2024年

作者： Qin, Shucan Peng, Qianqian Kong, Weizhen Xue, Rong Xu, Chongqing Shi, Jianming Liu, Yanrong Ma, Yunqian Jinan250353 China Longzihu New Energy Laboratory Zhengzhou Institute of Emerging Industrial Technology Henan University Zhengzhou450000 China Mingshuo Environment Group Weifang262605 China CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Mesoscience and Engineering Beijing Key Laboratory of Ionic Liquids Clean Process Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China

Integrating sulfide oxidation reaction (SOR) with hydrogen evolution reaction (HER) by electrochemical technology for sulfion valorization and hydrogen production is expected to maximize resources. Here, we report a phosphorus-doped transition metal selenide supported on nickel foam (P-CoSe/NF) to be efficiently and stably dual-used for SOR and HER, and this succulent-like catalyst with large surface area has an excellent activity up to 100 mA cm-2 at only 0.362 V. The H2 Faraday efficiency and rate of sulfur evolution reach 97.4% and 26.24 mg h-1, respectively. The Density Functional Theory calculations demonstrate that P-doping can offer an optimal electronic structure and local coordination environment by tuning d electron number. The potential rate-limiting step with a low energy barrier indicates the self-cleaning tendency. This work presents a promising approach for transition metal selenide catalysts in the electrochemistry field, representing a significant advancement in low-cost and high value-added utilization of waste resources. © 2024, The Authors. All rights reserved.

关键词： Hydrogen production

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Cell-Wall Based Aerogel for CE (Ⅲ) Adsorption from Leaching Tailing: Property and Mechanistic Research

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SSRN 2023年

作者： Zhao, Hui Yao, Haoyu Zhao, Feifei Yang, Liangrong Wu, Lianying Liang, Xiangfeng Liu, Huizhou Yu, Changjiang College of Chemistry and Chemical Engineering Ocean University of China Qingdao266071 China Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao266061 China Shandong Energy Institute Qingdao266061 China CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China

Efficient separation of rare earth elements (REEs) from leaching tailing is of great significance for environmental protection and full utilization of resources. Cell-wall is rich in various active groups which can efficiently adsorb REEs. In this work, a series of composite aerogels based on pectin and cellulose (the key active components in cell-wall) were fabricated for effectively adsorption of Ce (Ⅲ) from leaching tailing. The physical and chemical property of composite aerogels were characterized by SEM, FT-IR, XRD, contact angle measuring instrument and zeta potentiometer. The adsorption capacity was measured under different conditions. The fitting of isothermal adsorption model showed that the adsorption conforms to Langmuir model and the maximum adsorption capacity of Ce (Ⅲ) was 337.36 mg/g at pH 6. Kinetic fitting indicated that the adsorption process conforms to the second-order kinetic model. Composite aerogels have an excellent regeneration performance. Adsorption process is realized by electrostatic interaction, ion exchange with -COO- and chelation with C-NH2. The actual adsorption in leaching tailing showed that the adsorption efficiency of composite aerogels for Ce (Ⅲ) and Eu (Ⅲ) can reach 68 % and 81 % respectively, which have good practicability. © 2023, The Authors. All rights reserved.

关键词： Aerogels

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Utilizing Ca3(PO4)2 and calcium superphosphate fertilizer for the passage of heavy metals in coal gangue: Mechanical insights and efficiency evaluation

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Environmental engineering Research 2025年第4期30卷

作者： Zhang, Hualin Bai, Wenlong Tian, Shaojing Zhao, Mengfei Yang, Youming Jiang, Xiaoliang Li, Tinggang School of Metallurgical engineering Jiangxi University of Science and Technology Ganzhou341099 China Key Laboratory of Rare Earth Jiangxi Province Key Laboratory of Cleaner Production of Rare Earths Jiangxi Institute of Rare Earths Ganjiang Innovation Academy Chinese Academy of Sciences Ganzhou341003 China CAS Key Laboratory of Green Process and Engineering Innovation Academy for Green Manufacture National Engineering Research Center of Green Recycling for Strategic Metal Resources Beijing Engineering Research Centre of Process Pollution Control Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Inner Mongolia Dongyuan Environmental Protection Technology Co. Ltd Ordos014300 China State Key Laboratory of Biochemical Engineering Key Laboratory of Biopharmaceutical Preparation and Delivery Chinese Academy of Sciences Beijing100190 China University of Chinese Academy of Sciences Beijing100049 China

Coal gangue is a typical industrial waste, which will bring environmental challenges and resource depletion when piled up in large quantities, and heavy metal pollution is a prominent problem. In this study, Ca3(PO4)2 and calcium superphosphate fertilizer (CSF) were utilized to passivate coal gangue at different pollution levels, and its passivation mechanism was discussed. The results show that both Ca3(PO4)2 and CSF can effectively passivate coal gangue and effectively reduce moderate or high levels of coal gangue pollution to a slight or clean level. The passivation effect of CSF is slightly better than that of Ca3(PO4)2. Through characterization of coal gangue before and after passivation and simulation with Visual MINTEQ and PHREEQC software, it is found that Ca3(PO4)2 can provide PO3 2−, while CSF releases HPO3 –, which is ionized to generate more PO3 2−, and finally forms insoluble or slightly soluble phosphate with heavy metals. Leaching experiments show that the treated samples contain obviously more stable heavy metal components, and the leaching risk is lower than that of untreated coal gangue. In summary, this method proves its effectiveness in fixing heavy metals in coal gangue and provides an effective method for the harmless treatment of coal gangue. © 2025, Korean Society of Environmental Engineers. All rights reserved.

关键词： Coal tailings

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Photothermal assisted CO2 photoreduction over hollow urchin-like structured TiO2@SnS2 heterojunction with enriched oxygen defects

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Chemical engineering Journal 2025年 516卷

作者： You, Feifei Li, Dazhao Wang, Dan Ge, Yuanyu Lu, Zhenqian Qi, Jian Li, Danyang College of Textile and Clothing Yancheng Institute of Technology Yancheng224051 China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China Shandong Provincial Key Laboratory of Monocrystalline Silicon Semiconductor Materials and Technology Dezhou University Dezhou253023 China

Solar driving CO2 photoreduction represents a highly promising strategy that can not only reduce CO2 level in the atmosphere but also yield value-added chemicals. Herein, an urchin-like hollow structured hybrid with TiO2@SnS2 heterogeneous junction was designed and synthesized through a facile approach including hard-template method and hydrothermal process. When used as catalyst for photocatalytic CO2 reduction, the optimized sample exhibited exceptional activity with a CO yield rate of 52.86 µmol·g-1h−1 and durability during 4 cycles within 28 h. The enhanced performance could be attributed to i) the confinement effect of hollow structure enhancing the light capture and absorption owing to the multi-reflection/scattering of incident light in hollow cavity;ii) the constructed hetero-junction between TiO2 and SnS2 facilitating the transfer and separation of charge carriers and iii) photothermal effect induced by confinement effect of hollow structure through trapping the unused incident light and oxygen defects promoting the activation of CO2 molecules. We believed that this work could inspire further development in the field of synthesis of hollow structured catalysts as well as photocatalysis. © 2025 Elsevier B.V.

关键词： Titanium dioxide

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Selective adsorption behavior of ion-imprinted magnetic chitosan beads for removal of Cu(Ⅱ) ions from aqueous solution

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Chinese Journal of Chemical engineering 2021年第11期34卷 103-111页

作者： Licheng Ma Qi Zheng State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Rare Metals and Metallurgy Materials Research Institute General Research Institute for Nonferrous MetalsBeijing 100008China

Heavy metal ion is one of the major environmental *** this study,a Cu(Ⅱ)ions imprinted magnetic chitosan beads are prepared to use chitosan as functional monomer,Cu(Ⅱ)ions as template,Fe_(3)O_(4) as magnetic core and epichlorohydrin and glutaraldehyde as crosslinker,which can be used for removal Cu(Ⅱ)ions from *** kinetic study shows that the adsorption process follows the pseudosecond-order kinetic *** adsorption isotherm study shows that the Langmuir isotherm equation best fits for the monolayer adsorption *** selective adsorption properties are performed in Cu(Ⅱ)/Zn(Ⅱ),Cu(Ⅱ)/Ni(Ⅱ),and Cu(Ⅱ)/Co(Ⅱ)binary *** results shows that the ⅡMCD has a high selectivity for Cu(Ⅱ)ions in binary *** mechanism of ⅡMCD recognition Cu(Ⅱ)ions is also *** results show that the ⅡMCD adsorption Cu(Ⅱ)ions is an enthalpy controlled *** absolute value of DH(Cu(Ⅱ))and DS(Cu(Ⅱ))is greater than DH(Zn(Ⅱ),Ni(Ⅱ),Co(Ⅱ))and DS(Zn(Ⅱ),Ni(Ⅱ),Co(Ⅱ)),respectively,this indicates that the Cu(Ⅱ)ions have a good spatial matching with imprinted holes on Ⅱ*** FTIR and XPS also demonstrates the strongly combination of function groups on imprinted holes in the suitable space ***,the ⅡMCD can be regenerated and reused for 10 times without a significantly decreasing in adsorption *** information can be used for further application in the selective removal of Cu(Ⅱ)ions from industrial wastewater.

关键词： Ion imprinted techniques Selective recognition Ion-imprinted magnetic chitosan beads Kinetic Thermodynamics

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Effect of crystallization on purity of volatile metallic magnesium prepared from a one-step multi-region condensation process under vacuum condition

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Journal of Magnesium and Alloys 2022年第11期10卷 3281-3287页

作者： Bin Yang Dong Liang Neng Xiong Yang Tian Baoqiang Xu Yongnian Dai The State Key Laboratory of Complex Non-ferrous Metal Resources Clean Utilization Kunming University of Science and TechnologyKunming 650093China National Engineering Laboratory for Vacuum Metallurgy Kunming University of Science and TechnologyKunming 650093China Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming 650093China IME Institute of Process Metallurgy and Metal Recycling RWTH Aachen UniversityAachen 52056Germany

We hereby report a green and simple volatilization-condensation process to prepare high-purity magnesium in different crystal forms under vacuum condition. This method can be also used for the analysis of other metals, which can be separated by the same concept. In addition, Mg condensation is a very fast process, and the corresponding easy growth of the Mg crystals is promoted when the concentration of magnesium vapor is raised. From the view of crystallization, ultrafast crystal growth of high-purity magnesium is a barrier-free and orderly process. Interestingly, different condensed forms of Mg obtained via this ultrafast volatilization-condensation process are showing different purities. The distinct morphological formation of Mg in different condensed form is probably attributed to the differences of surface energy change of Mg during the condensation process.

关键词： Mg Purity Vacuum Condensation Crystallization

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Flexible Chain Tunning of Metalloporphyrin Ionic Framework: Spatial Microenvironment Construction for Enhancing Urea Alcoholysis

SSRN

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SSRN 2024年

作者： Deng, Lili Su, Qian Li, Zengxi Cheng, Weiguo School of Chemical Sciences University of Chinese Academy of Sciences Beijing100049 China Beijing Key Laboratory of Ionic Liquids Clean Process State Key Laboratory of Mesoscience and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China

Urea alcoholysis is a key industrial sustainable process in CO2-based chemical production and hydrogen energy storage, but current approaches based on catalytic materials are limited due to their lack structural accuracy and customizability nature. For a sustainable supply of catalytic materials, considerable effort from the scientific aspect for developing functional organic-designable-heterogeneous (metalloporphyrin ionic framework) catalysts have been made by combining metal ions and ionic liquids (ILs) for the transformation of urea and biobased diols into cyclic carbonates. As expected, benefiting from fine tuning of metalloporphyrin ionic framework spatial microenvironment by flexible chains, which effectively regulates the charge distribution of porphyrin coordinated metal ions and in situ synthesized ILs. Meanwhile, the medium flexible chain of Zn-TPyP-Bu-Br ensures consistency in the direction of porphyrin monomer and abundance of active sites, promoting the catalytic conversion of urea and intermediate substance for higher yield of cyclic carbonates with remarkable stability and less catalyst dosage. Based on detailed experiments and molecular dynamics simulations, this catalytic microenvironment effects can be explained by the influence of porphyrin flexible linking chains on the charge regulation of active sites. This work suggests a strategy to be extended to the rational design of a large family of functional organic polymer catalysts that could fulfil the vast promise of urea and biobased diols to fuel a reliable and potentially sustainable energy source. © 2024, The Authors. All rights reserved.

关键词： Hydrogen storage

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Highly reliable and efficient encoding systems for hexadecimal polypeptide-based data storage

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Fundamental Research 2023年第2期3卷 298-304页

作者： Yubin Ren Yi Zhang Yawei Liu Qinglin Wu Hong-Gang Hu Jingjing Li Chunhai Fan Dong Chen Kai Liu Hongjie Zhang Department of Chemistry Tsinghua UniversityBeijing 100084China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Institute of Process Equipment College of Energy Engineering and State Key Laboratory of Fluid Power and Mechatronic SystemsZhejiang UniversityHangzhou 310027China Institute of Translational Medicine Shanghai UniversityShanghai 200444China Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineeringand Institute of Molecular MedicineRenji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200240China

Polypeptides consisting of amino acid(AA)sequences are suitable for high-density information ***,the lack of suitable encoding systems,which accommodate the characteristics of polypeptide synthesis,storage and sequencing,impedes the application of polypeptides for large-scale digital data *** address this,two reliable and highly efficient encoding systems,***-Arithmetic-Base64-Shuffle-RS(RABSR)and RaptorQArithmetic-Huffman-Rotary-Shuffle-RS(RAHRSR)systems,are developed for polypeptide data *** two encoding systems realized the advantages of compressing data,correcting errors of AA chain loss,correcting errors within AA chains,eliminating homopolymers,and pseudo-randomized *** coding efficiency without arithmetic compression and error correction of audios,pictures and texts by the RABSR system was 3.20,3.12 and 3.53 Bits/AA,*** that using the RAHRSR system reached 4.89,4.80 and 6.84 Bits/AA,*** implemented with redundancy for error correction and arithmetic compression to reduce redundancy,the coding efficiency of audios,pictures and texts by the RABSR system was 4.43,4.36 and 5.22 Bits/AA,*** efficiency further increased to 7.24,7.11 and 9.82 Bits/AA by the RAHRSR system,***,the developed hexadecimal polypeptide-based systems may provide a new scenario for highly reliable and highly efficient data storage.

关键词： Biomaterial Polypeptide Data storage Hexadecimal Encoding system

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Effect of layered-coupling in twisted WSe_(2) moiré superlattices

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Nano Research 2023年第2期16卷 3435-3442页

作者： Biao Wu Haihong Zheng Shaofei Li Chang-Tian Wang Junnan Ding Jun He Zongwen Liu Jian-Tao Wang Yanping Liu School of Physics and Electronics Hunan Key Laboratory for Super-microstructure and Ultrafast ProcessCentral South UniversityChangsha 410083China State Key Laboratory of High-Performance Complex Manufacturing Central South UniversityChangsha 410083China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China School of Chemical and Biomolecular Engineering The University of SydneyNSW 2006Australia The University of Sydney Nano Institute The University of SydneyNSW 2006Australia Songshan Lake Materials Laboratory Dongguan 523808China Shenzhen Research Institute of Central South University Shenzhen 518000China

Recently,the discovery of a variety of moiré-related properties in the twisted vertical stacking of two different monolayers has attracted considerable *** introduction of small twist angles in transition metal dichalcogenide(TMD)heterostructures leads to the emergence of moirépotentials,which provide a fascinating platform for the study of strong interactions of *** there has been extensive research on moiréexcitons in twisted bilayer superlattices,the capture and study of moiréexcitons in homostructure superlattices with layer-coupling effects remain ***,we present the observation of moiréexcitons in the twisted 1L-WSe_(2)/1L-WSe_(2)and 1L-WSe_(2)/2L-WSe_(2)homostructures with various layer-coupling *** results reveal that the moirépotential increases(~260%)as the number of underlying layers decreases,indicating the effect of layer coupling on the modulation of the moiré*** effects of the temperature and laser power dependence as well as valley polarization on moiréexcitons were further demonstrated,and the crucial spectral features observed were *** findings pave the way for exploring quantum phenomena and related applications of quantum information.

关键词： twisted homostructures moirésuperlattices moirépotential layer-coupling

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