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Total conversion of centimeter-scale nickel foam into single atom electrocatalysts with highly selective CO_(2)electrocatalytic reduction in neutral electrolyte

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Nano Research 2023年第2期16卷 2003-2010页

作者： Qikui Fan Pengfei Gao Shan Ren Yunteng Qu Chuncai Kong Jian Yang Yuen Wu Ministry of Education Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic PhysicsSchool of PhysicsXi’an Jiaotong UniversityXi’an 710049China Shenzhen Key Laboratory of Special Functional Materials Guangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China Northwest Institute of Nuclear Technology Xi’an 710024China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China State Key Laboratory of Photoelectric Technology and Functional Materials International Collaborative Center on Photoelectric Technology and Nano Functional MaterialsInstitute of Photonics and Photon-TechnologyNorthwest UniversityXi’an 710069China Department of Chemistry iChEM(Collaborative Innovation Center of Chemistry for Energy Materials)University of Science and Technology of ChinaHefei 230026China

To improve the atomic utilization of metals and reduce the cost of industrialization,the one-step total monoatomization of macroscopic bulk metals,as opposed to nanoscale metals,is *** this study,we used a thermal diffusion method to directly convert commercial centimeter-scale Ni foam to porous Ni single-atom-loaded carbon nanotubes(CNTs).As expected,owing to the coating of single-atom on porous,highly conductive CNT carriers,Ni single-atom electrocatalysts(Ni-SACs)exhibit extremely high activity and selectivity in CO_(2)electroreduction(CO_(2)RR),yielding a current density of>350 mA/cm^(2),a selectivity for CO of>91%under a flow cell configuration using a 1 M potassium chloride(KCl)*** on the superior activity of the Ni-SACs electrocatalyst,an integrated gas-phase electrochemical zero-gap reactor was introduced to generate a significant amount of CO current for potential practical *** overall current can be increased to 800 mA,while maintaining CO Faradaic efficiencies(FEs)at above 90%per unit *** findings and insights on the active site transformation mechanism for macroscopic bulk Ni foam conversion into single atoms can inform the design of highly active single-atom catalysts used in industrial CO_(2)RR systems.

关键词： Ni single atom electrocatalyst CO_(2)electroreduction to CO neutral electrolyte thermal diffusion

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Facile synthesis of W-Mo bimetallic oxides with high adsorption properties from secondary resources

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Tungsten 2024年第4期6卷 806-820页

作者： Jia-Li Cheng Yang-Si Liu Xiao-Li Xi Zuo-Ren Nie Collaborative Innovation Center of Capital Resource-Recycling Material Technology College of Materials Science and EngineeringBeijing University of TechnologyBeijing100124China National Engineering Laboratory for Industrial Big-Data Application Technology Beijing University of TechnologyBeijing100124China Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing100124China

A simple solvothermal method was used to obtain W-Mo bimetallic oxides from W-Mo alloy scrap,and pure metal powders were also used as the raw materials to simulate *** products had a sea urchin-like structure with abundant oxygen vacancies and the products prepared at low temperatures forms a sosoloid resembling orthorhombic W_(0.4)Mo_(0.6)O_(3).The WMo bimetallic oxide prepared at the reaction temperature of 120℃exhibited excellent selective adsorption performance for methylene blue(MB),which the adsorption rate of MB reached 99%in 12 min and the adsorption rate reached 90%after6 adsorption *** the W-Mo molar ratio is 1:3,the maximum adsorption capacity of sample for MB can reach1148 mg·g^(-1).The adsorption process followed the Langmuir and pseudo-second-order models,which is surface-controlled monolayer *** experimental results show the feasibility of preparing W-Mo bimetal oxide products from pure materials and *** process is simple and effective,which offered a potential approach for secondary resource recycling and reusing.

关键词： W-Mo bimetallic oxide Oxygen vacancy Selective adsorption W-Mo alloy scrap Solvothermal

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Side Chain Crosslinked Anion Exchange Membrane for Acid Concentration by Electrodialysis

Chem and Bio Engineering

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Chem and Bio Engineering 2024年第7期1卷 647-657页

作者： He, Haoyang Chen, Qian Fu, Rongqiang Liu, Zhaoming Ge, Liang Xu, Tongwen Key Laboratory of Precision and Intelligent Chemistry School of Chemistry and Materials Science University of Science and Technology of China Hefei230026 China Applied Engineering Technology Research Center for Functional Membranes Institute of Advanced Technology University of Science and Technology of China Hefei230088 China Shandong Tianwei Membrane Technology Co. LTD Weifang262737 China

Electrodialysis (ED) technology for waste acid treatment has high economic efficiency and environmentally friendly advantages. The primary limitation of ED in the retrieval of low-concentration spent acids lies in the leakage of hydrogen ions through anion exchange membranes (AEMs) due to its extremely small size and high mobility. To address this issue, a series of AEMs named QPAB-x (x = 3, 5, 7, 10) were designed for acid concentration in ED process by increasing the membrane densities through in situ crosslinking in this study. The successful synthesis of polymers was confirmed through 1H nuclear magnetic resonance hydrogen (1H NMR) spectroscopy and Attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy. Furthermore, ATR-FTIR spectroscopy showed that the higher the side chain content, the higher the crosslinking degree of the membranes. X-ray photoelectron spectroscopy (XPS) was employed to characterize the effects of aqueous and acidic environments on QPAB membranes. The performance disparities between QPAB-x membranes in acidic and aqueous environments were examined separately. Subsequently, the influence of crosslinking degree on the acid-blocking capability of the membranes was thoroughly investigated by conducting ED acid-concentration experiments to monitor the hydrogen ions concentration process and determine the current efficiency and energy consumption of the QPAB-x membranes. Our experimental results demonstrated that QPAB-x membranes with higher cross-linking degrees have lower water content, especially the QPAB-10 membrane with an IEC of approximately 1.5 mmol g-1 and a remarkably low water content of around 10%. This leads to a reduced H+ transfer number and excellent acid-blocking properties. Additionally, compared to commercial membrane A2, using the QPAB-10 membrane in the ED process resulted in a higher final H+ concentration in the concentrated chamber. Consequently, these synthesized membranes exhibit considerable promis

关键词： Fourier transform infrared spectroscopy

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Preparation and molten salts corrosion behavior of high-entropy（Ca,Sr,Ba） TMO3（ TM = Zr, Hf and Ta）: Promising protecting materials of reference electrode for metal smelting through fused salts electrolysis

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Corrosion Communications 2021年第3期3卷 10-22页

作者： Shuaihang Qiu Huimin Xiang Fu-Zhi Dai Hailong Wang Yanchun Zhou School of Materials Science and Engineering Zhengzhou University Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials & Processing Technology

The protecting materials of reference electrode with good corrosion resistance to molten salts play vital roles in realizing smelting of refractory and rare earth metals through fused salts electrolysis. BaZrO3has been considered as a candidate protecting material of reference electrode for its good chemical stability and high-temperature corrosion resistance. However, the unsatisfactory corrosion resistance to molten salts hinders its practical application. In order to enhance the corrosion resistance to molten salts, three perovskite structured high-entropy oxides HE（Ca,Sr,Ba） TMO3including（Ca,Sr,Ba）(Zr,Hf)O3,（Ca,Sr,Ba）(Zr,Ta)O3and（Ca,Sr,Ba）(Zr,Hf,Ta)O3, were designed and prepared in this work. The as-prepared HE（Ca,Sr,Ba）(Zr,Hf)O3and（Ca,Sr,Ba）(Zr,Hf,Ta)O3ceramics are single-phase, while the as-prepared HE（Ca,Sr,Ba）(Zr,Ta)O3ceramic contains 11.6 vol.% of（Ca,Sr,Ba）2Ta2O7. These HE（Ca,Sr,Ba） TM O3ceramics possess better corrosion resistance to molten Na Cl-KCl salts than Ba Zr O3, among which（Ca,Sr,Ba）(Zr,Hf,Ta)O3shows the best corrosion resistance to molten Na Cl-KCl salts. The mass loss per unite area of HE（Ca,Sr,Ba）(Zr,Hf,Ta)O3after corrosion by molten Na Cl-KCl salts at 800 °C for 8 h is mere 2.6 ×10-6g/mm2which is ca. 1/60 of that of BaZrO3( ～1.7 ×10-4g/mm2), and its surface after corrosion is plain and smooth without any new phase detectable after corrosion. It also exhibits better corrosion resistance to molten Na F-KF salts than BaZrO3. The mass loss per unite area after corrosion by molten Na F-KF salts at 800 °C for 8 h is only 2.9 ×10-5g/mm2which is smaller than that of BaZrO3(3.6 ×10-5g/mm2), the corrosion caused by molten Na F-KF salts only occurs on the surface and the thickness of the corrosion layer is mere ～8 μm, being less than 1/10 of that of BaZrO3（～100 μm）. These results indicate that the three HE（Ca,Sr,Ba） TMO3, especially（Ca,Sr,Ba）(Zr,Hf,Ta)O3, are promising as protecting materials of reference electrode for the smelting of refractory and rar

关键词： High-entropy ceramics Perovskite-oxide Corrosion resistance Metal smelting Molten NaCl-KCl salts Molten NaF-KF salts

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Influence of Spatial Correlation Function on Characteristics of Wideband Electromagnetic Wave Absorbers with Chaotic Surface

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Chinese Physics Letters 2022年第9期39卷 23-27页

作者： Rui Zhang Fan Ding Xujin Yuan Mingji Chen Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures Institute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing 100081China China Ship Development and Design Center Wuhan 430064China

Electromagnetic metasurface with chaos patterned surface could bring rich interaction modes contributing to fully disordered random motions in deterministic systems, which preform uncertainty, irreducibility and unpredictability. We investigate the influence of the correlation function(CF) properties of surface random patterns on the wave absorption performance. The complicated correlation function provides a fully developed random state, broadening the absorption bandwidth significantly and is helpful for reaching higher absorption rate. With the increasing number of peaks in the correlation function, the absorption band at-15 d B reflectivity widens significantly, band at-20 d B reflectivity begins to emerge. As the first peak’s distance from the original point in the CF is enlarged, the absorption trough is gradually formed and deepened to-35 d B level. The results give in-depth understanding of the relation between absorption behavior and controlling parameters including correlation, image information and foam spacer layer thickness. This high absorption absorber has great application potential in customizable radio communication compatibility device and anechoic testing chamber.

关键词： absorption Electromagnetic reflectivity

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Water-resistant conductive organogels with sensation and actuation functions for artificial neuro-sensory muscular systems

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SmartMat 2022年第4期3卷 632-643页

作者： Zhixing Zhang Yunfei Yu Huitao Yu Yiyu Feng Wei Feng School of Materials Science and Engineering Tianjin UniversityTianjinChina Tianjin Key Laboratory of Composite and Functional Materials Tianjin UniversityTianjinChina Key Laboratory of Advanced Ceramics and Machining Technology Ministry of EducationTianjinChina

The development of functional flexible conductive materials can significantly contribute to the improvement of intelligent human–computer ***,it is a challenge to endow human–machine interface with perception and response actuation ***,a customizable and multifunctional electronic conductive organogel is proposed by combining conductive carbon nanotube(CNT)clusters and flexible adhesive *** conductive CNT cluster layers generated on the surface of organogels equip the resulting organogel-based conductors with considerable quasi-superhydrophobicity and increase their potential applicability as highly sensitive stress and strain *** particular,this quasi-superhydrophobicity is insensitive to tensile *** on customizable conductive networks and entropy-driven organogel actuation,the conductive organogels can sense various strain and stress signals and imitate natural organisms with muscle actuation and *** strategy for preparing electronic conductors can enhance the rational design of soft robotics and artificial intelligence devices,facilitating further progress of human-like intelligent systems.

关键词： actuation adhesive organogel carbon nanotube cluster flexible sensor sensation

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Lithiophilic seeds and rigid arrays synergistic induced dendrite-free and stable Li anode towards long-life lithium-oxygen batteries

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Journal of Energy Chemistry 2022年第10期31卷 268-276,I0006页

作者： Yue Li Haichang Zhang Rui Zhang Junwei Sha Liying Ma Dongdong Zhao Chunsheng Shi Naiqin Zhao School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials Tianjin UniversityTianjin 300350China Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin 300072China Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072China China Science and Technology on Power Sources Laboratory Tianjin Institute of Power SourcesTianjin 300384China

High energy density lithium-oxygen battery(LOB) is currently regraded as a promising candidate for next-generation power ***,the dendrite and instability issues of Li metal anode lead to its poor cyclic stability and low energy *** this work,lithiophilic Al_(2) O_(3) seeds induced rigid carbon nanotube arrays(CNTA)/three-dimensional graphene(3 DG) is developed as a host material for Li anode,namely Al_(2) O_(3)-CNTA/3 *** is demonstrated that the lithiophilic feature of Al_(2) O_(3) seeds and the enhanced rigidity of arrays can synergistically induce the uniform Li flux,inhibit the collapse of arrays,and stabilize electrolyte/electrode *** a result,the Al_(2) O_(3)-CNTA/3 DG-Li anode delivers a high Coulombic efficiency above 97% after 140 cycles(8 mAh cm^(-2) at 4 mA cm^(-2)).With this anode and the breathable CNTA/3 DG cathode,the full LOB exhibits a significantly increased life-span up to 160 cycles(500 mAh g^(-1) at 100 mA g^(-1)),which is almost 3 times longer than that with pure Li foil as the *** work demonstrates a new approach to highly reversibly long-cycling performance of LOBs towards practical application.

关键词： Caron nanotube array Al_(2)O_(3) Li-O_(2)battery Li metal Anode

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Ultra-high-temperature application of MXene: Stabilization of 2D Ti_(3)C_(2)T_(x) for cross-scale strengthening and toughening of 3D TiC

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Journal of advanced Ceramics 2024年第1期13卷 1-10页

作者： Lu Liu Guobing Ying Quanguo Jiang Dong Wen Peng Wang Meng Wu Ziying Ji Yongting Zheng Xiang Wang Department of Materials Science and Engineering College of Mechanics and MaterialsHohai UniversityNanjing 211100China Key Laboratory of Superlight Materials&Surface Technology Ministry of EducationHarbin Engineering UniversityHarbin 150001China Shenzhen Key Laboratory for Advanced Materials School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China Center for Composite Materials and Structures Harbin Institute of TechnologyHarbin 150001China

Transition metal carbide/nitride cores within MXenes make them considerably useful for ultra-high-temperature ***,extensive research on Ti_(3)C_(2)T_(x) MXene has revealed its tendency to undergo a phase transition to TiCy at temperatures above 800℃due to high activity of a superficial Ti atomic ***,spark plasma sintering of Ti_(3)C_(2)T_(x) and TiC is performed to prevent the Ti_(3)C_(2)T_(x) phase transition at temperatures up to 1900℃through the fabrication of composites at a pressure of 50 *** a focused ion beam scanning electron microscope to separate layered substances in the composites and examining selected area diffraction spots in a transmission electron microscope enabled identification of non-phase-transitioned ***-principles calculations based on density functional theory indicated the formation of strong chemical bonding interfaces between Ti_(3)C_(2)T_(x) and TiC,which imposed a stability constraint on the Ti atomic layer at the Ti_(3)C_(2)T_(x) *** performance tests,such as three-point bending and fracture toughness analysis,demonstrated that the addition of Ti_(3)C_(2)T_(x) can effectively improve the cross-scale strengthening and toughening of the TiC matrix,providing a new path for designing and developing two-dimensional(2D)carbides cross-scale-enhanced three-dimensional(3D)carbides with the same elements relying on a wide variety of MXenes.

关键词： MXene ultra-high-temperature phase stability interface bonding cross-scale strengthening and toughening structural ceramic composites

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Copper oxide-modified highly reversible Zn powder anode for aqueous Zn metal batteries

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Rare Metals 2024年第10期43卷 5005-5016页

作者： Guan-Qun Liu Biao Fu Zhe-Xuan Liu Lan-Yan Li Shu-Quan Liang Guo-Zhao Fang School of Materials Science and Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan ProvinceCentral South UniversityChangsha 410083China School of Science Hunan University of Technology and BusinessChangsha 410205China National Energy Metal Resources and New Materials Key Laboratory Central South UniversityChangsha 410083China

With the advantages of mature preparation technology,structural adjustability and suitability for large-scale application,Zn powder anode is considered to be an ideal electrode for realizing low-cost,high-energy-density aqueous Zn metal ***,the high specific surface of Zn powders leads to severe side reactions such as hydrogen evolution and corrosion,thus limiting their widespread use Here,this work develops a novel CuO@Zn powder anode with a synergy effect of surface wrapping and *** powders are uniformly wrapped by small CuO particles due to the strong adsorption between Zn and *** wrapped CuO particles build a good conductive framework to inhibit the structural collapse of the Zn powder caused by corrosion and non-uniform ***,CuO can also be used as a seed to guide the uniform deposition of Zn ions through its strong binding energy with *** a result,the Cu O@Zn anode can maintain a long cyclic life of 900 h at current density of 1 mA·cm^(-2)and capacity of 1 mAh·cm^(-2),as well as contribute to an excellent capacity retention of 92% after 800cycles for CuO@Zn||NH_(4)V_(4)O_(10)full *** at high current density of 5 A·g^(-1),the full cell exhibits a specific capacity of more than 200 mAh·g^(-1)after 800 cycles,with a good capacity retention of 89%.This work provides a new idea for developing high-performance Zn powder-based anodes.

关键词： Zn powder Copper oxide Surface wrapping Zn anode Aqueous Zn metal batteries

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A novel inflatable rings supported design and buoyancy-weight balance deformation analysis of stratosphere airships

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Chinese Journal of Aeronautics 2022年第1期35卷 340-347页

作者： Weinan GAO Ji ZHANG Teng MA Guochang LIN Yuanpeng LIU Changguo WANG Huifeng TAN Center for Composite Materials Harbin Institute of TechnologyHarbin 150001China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China

Owing to the unique advantages in flight altitude,dwelling time and wide coverage area,stratospheric airships provide permanent monitoring and surveillance for both civil and military *** we propose a semi-rigid stratosphere airship design with circumferential high-pressure inflatable rings and a longitudinal carbon fiber skeleton supported *** perform numerical simulations to analyze the deformation characteristics during the whole ascending and descending *** equivalent internal gradient pressure model of helium is established based on the capsule shape and buoyancy-weight equilibrium *** implicit dynamic method is used to deal with the large deformation of the airship capsule under a low negative pressure *** and load-bearing performance of the airship capsule,inflatable ring,skeleton,and suspension line are obtained under different working *** results show that the airship,supported with the inflatable rings and the suspension lines,effectively maintains the shape and ensures the stiffness during the ascending,dwelling,and descending stages,especially suffering from negative pressure.

关键词： Buoyancy-weight balance Large deformation Load-bearing performance Negative pressure Stratospheric airship

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