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Cu catalysts detour hydrogen evolution reaction

Matter 2022年第8期5卷 2537-2540页

作者： Ying Dong Jing Li Xiao-Yu Yang Department of Forensic Medicine Huazhong University of Science and Technology 13 Hangkong Road Wuhan 430030 China Hubei Province Key Laboratory of Coal Conversion and New Carbon Materials School of Chemistry and Chemical Engineering Wuhan University of Science and Technology Wuhan 430081 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao) Wuhan University of Technology 122 Luoshi Road Wuhan 430070 China School of Engineering and Applied Sciences Harvard University Cambridge MA 02138 USA

The use of electrocatalytic reactions in aqueous solution to produce high-value chemicals is severely restricted by the occurrence of the electrochemical reaction of water. In a recent study published in Nature Nanotechnology by Haotian Wang and colleagues, hydrophilic-hydrophobic Cu catalysts, which suppress the undesirable hydrogen evolution reaction, have been discovered to promote conversion of 99% nitrate at an industrial wastewater level into ammonia using an industrial-relevant reduction current of 1 A/cm 2 .

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Enhanced degradation of tetracycline over the novel biochar doped with Cu-Mn by peroxymonosulfate activation: Performance evaluation and mechanisms

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Journal of Environmental Chemical Engineering 2025年第5期13卷

作者： Xinyu Li Haochen Li Xiaofei Zong Yanbo Wang Jiahui Wu Yuwei Deng Yuxuan Ye Wentao Li Qiang Li Fei Pan School of Resources and Environment Wuhan Textile University Wuhan 430200 China State Key Laboratory of New Textile Materials and Advanced Processing Wuhan Textile University Wuhan 430200 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210023 China

A novel orange peels biochar doped with Cu and Mn (CuMn@OPC) was prepared for activating peroxymonosulfate (PMS) to degrade tetracycline (TC). Its physicochemical properties was investigated by SEM, FTIR, XRD and XPS. CuMn@OPC could effectively activate PMS to degrade 91.26 % of TC under optimal conditions. CuMn@OPC exhibited stability for TC degradation in pH values of 2.98–10.9. The main oxygen active species involved were •OH, SO₄ • ⁻ and 1 O 2 . The cyclic conversion between Cu 0 /Cu + /Cu 2+ and Mn 2+ /Mn 3+ contributed significantly to the degradation. Three degradation pathways of TC were proposed and TC was degraded into non-toxic small molecules in the CuMn@OPC/PMS system. This study confirmed that the doping of Cu and Mn onto the biochar could synergistically enhance the degradation, providing a new approach for the application of carbon-based material catalysts in the degradation of pollutants.

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Review on the 3-D simulation for weft knitted fabric

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Journal of Engineered Fibers and Fabrics 2021年第16期16卷

作者： Sha, Sha Geng, Anqi Gao, Yuqin Li, Bin Jiang, Xuewei Tao, Hui Luo, Lei Yuan, Xiaohong Ke, Huizhen Hu, Xinrong Deng, Zhongmin Chen, Zhi State Key Laboratory of New Textile Materials and Advanced Processing Technologies Key Laboratory of Textile Fiber Product Ministry of Education Wuhan Textile University WuhanHubei China Wuhan Textile and Apparel Digital Engineering Technology Research Center School of Fashion Wuhan Textile University WuhanHubei China Engineering Research Center of Hubei Province for Clothing Information Wuhan Textile University WuhanHubei China Fujian Key Laboratory of Novel Functional Textile Fibers and Materials Engineering Research Center of Textile and Clothing Fujian Province University Minjiang University Fuzhou China

There are different kinds of geometrical models and physical models used to simulate weft knitted fabrics nowadays, such as loop models based on Pierce, piecewise function, spline curve, mass-spring model, and finite element analyses (FEA). Weft knitting simulation technology, including modeling and yarn reality, has been widely adopted in fabric structure designing for the manufacturer. The technology has great potentials in both industries and dynamic virtual display. The present article is aimed to review the current development of 3-D simulation technique for weft knitted fabrics. © The Author(s) 2021.

关键词： Knit fabrics

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Two-dimensional MOF/MOF derivative arrays on nickel foam as efficient bifunctional coupled oxygen electrodes

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Chinese Journal of Catalysis 2020年第11期41卷 1754-1760页

作者： Kai Huang Shuai Guo Ruyue Wang Sen Lin Naveed Hussain Hehe Wei Bohan Deng Yuanzheng Long Ming Lei Haolin Tang Hui Wu State Key Laboratory of Information Photonics and Optical Communications School of ScienceBeijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina

Oxygen electrocatalysis,exemplified by the oxygen reduction reaction(ORR)and oxygen evolution reaction(OER),is central to energy storage and conversion technologies such as fuel cells,metal-air batteries,and water ***,highly effective and inexpensive earth-abundant materials are sought after to replace the noble metal-based electrocatalysts currently in ***,metal-organic frameworks(MOFs)and carbon-based MOF derivatives have attracted considerable attention as efficient catalysts due to their exceedingly tunable morphologies,structures,compositions,and ***,we report two-dimensional(2D)MOF/MOF derivative coupled arrays on nickel foam as binder-free bifunctional ORR/OER catalysts with enhanced electrocatalytic activity and *** remarkable electrochemical properties are primarily attributed to fully exposed active sites and facilitated charge-transfer *** coupled and hierarchical nanosheet arrays produced via our growth-pyrolysis-regrowth strategy offer promise in the development of highly active electrodes for energy-related electrochemical devices.

关键词： 2DMOFs Derivative Coupled arrays Binder-free Oxygen electrode

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All-Organic Shell-Core Pvdf/Pmma Composite Fiber Films with Enhanced Piezoelectric Performance for Flexible Sensing and Energy Harvesting

SSRN

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SSRN 2024年

作者： Li, Xiao Yuan, ChongXiao Gao, Guoqi Zhou, Hengqing Zhang, Nannan Yang, Xinyue Liu, Xiaofang Sun, Huajun School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology Wuhan430070 China State Key Laboratory of Silicate Materials for Architectures Center for Smart Materials and Device Integration School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Advanced Ceramics Institute of Zibo New & High-Tech Industrial Development Zone Zibo255000 China

The demand for self-powered sensing technology and energy harvesting system necessitates high-performance and flexible piezoelectric materials. This paper presents a novel approach utilizing coaxial electrospinning to fabricate all-organic PVDF/PMMA piezoelectric fiber films with a shell-core structure. The resulting fiber films, cut into 2 × 2 cm2 square pieces and hot-pressed every three pieces, demonstrate enhanced piezoelectric properties while retaining high flexibility. The interaction between the -C=O bonds in the PMMA polymer and the -CH2 in PVDF promotes the arrangement of F atoms in PVDF, enhancing the content of the piezoelectric active phase. Additionally, the coaxial electrospinning process fosters vertically oriented hydrogen bonds between PVDF and PMMA, augmenting cross-linking and improving mechanical properties. Notably, when the PVDF to PMMA layer volume ratio is 5:1, the piezoelectric coefficient (|d33|) of the composite fiber film exhibits a significant 60% increase from 10 pC/N in neat PVDF to 16 pC/N. This research holds substantial promise for applications in self-powered sensing and energy harvesting piezoelectric materials. © 2024, The Authors. All rights reserved.

关键词： Piezoelectricity

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Modulus-Modulated Nanogenerator with Remarkable Piezoelectricity

SSRN

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SSRN 2024年

作者： Gao, Guoqi Li, Xiao Yuan, Chongxiao Zhou, Hengqing Sun, Huajun Liu, Xiaofang School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology Wuhan430070 China State Key Laboratory of Silicate Materials for Architectures Center for Smart Materials and Device Integration School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Advanced Ceramics Institute of Zibo New High-Tech Industrial Development Zone Zibo255000 China

Addressing the energy crisis is pivotal to the advancement of human civilization. In this study, we have developed a highly flexible and efficient wearable piezoelectric nanogenerator (PENGs) employing polyvinylidene fluoride (PVDF) as the matrix and polymethacrylate (PMMA) as the dopant. Comprehensive characterization of the piezoelectric nanogenerator 's piezoelectric performance was conducted across varying conditions. Our findings reveal that a PMMA doping concentration of 2 wt% yields the most favorable outcomes. Specifically, at a bending frequency of 1 Hz and an amplitude of 5 mm, the PENGs exhibits a piezoelectric coefficient (d33) of 15 pC/N, a peak output voltage of 8 V, and an optimal load resistance of 70 MΩ, resulting in a power density of 0.72 μW/cm². Notably, the device sustains an extraordinarily stable and continuous output voltage over a period of 3000 seconds. This research represents a significant contribution to the field of eco-friendly, lead-free wearable piezoelectric nanogenerators, offering valuable insights for future advancements. © 2024, The Authors. All rights reserved.

关键词： Piezoelectricity

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Elemental partitioning as a route to design precipitation-hardened high entropy alloys

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Journal of materials Science & technology 2021年第13期72卷 52-60页

作者： Feng He Bin Han Zhongsheng Yang Da Chen Guma Yeli Yang Tong Daixiu Wei Junjie Li Zhijun Wang Jincheng Wang Ji-jung Kai Centre for Advanced Nuclear Safety and Sustainable Development City University of Hong KongHong KongChina State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an710072China Institute of Atomic and Molecular Science Shaanxi University of Science and TechnologyXi’an710021China Department of Mechanical Engineering City University of Hong KongHong KongChina Division of Materials Science and Technology Oak Ridge National LaboratoryOak RidgeTN 37831USA Institute for Materials Research Tohoku University2-1-1 KatahiraSendaiMiyagi980-8577Japan

Precipitation-hardened high entropy alloys(HEAs)with carefully tuned compositions have shown excellent mechanical properties,demonstrating great potential for engineering ***,due to the lack of precise multiple phase diagrams,the composition design of multi-principal-component HEAs still inevitably relies on the extremely time-consuming trial-and-error *** present study,on the basis of powerful composition quantification ability of atom probe tomography(APT)technology,proposed a framework to guide the quantitative design of precipitation-hardened *** this framework,the elemental partitioning was used as a crucial route to avoid the thermodynamic challenge of designing precipitation-hardened *** a case study,the role of Ti/Al ratio in the design ofγ-γ’HEAs was predicted through the proposed framework and then validated by experimental *** framework predicted that when the total content of Ti and Al is fixed,a higher Ti/Al ratio makesγ-γ’HEA *** and mechanical results agreed well with these predictions and validated the feasibility of the *** findings provided a new route to design the precipitation-hardened alloys and a deeper insight into the design ofγ-γ’HEA.

关键词： Elemental partitioning Alloy design Atom probe tomography High entropy alloys

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All-Organic Shell-Core Pvdf/Pmma Composite Fiber Films with Enhanced Piezoelectric Performance for Flexible Sensing and Energy Harvesting

SSRN

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SSRN 2024年

作者： Gao, Guoqi Zhou, Hengqing Yang, Xinyue Zhang, Nannan Liu, Xiaofang Li, Xiao Yuan, ChongXiao Sun, Huajun School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology Wuhan430070 China State Key Laboratory of Silicate Materials for Architectures Center for Smart Materials and Device Integration School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Advanced Ceramics Institute of Zibo New & High-Tech Industrial Development Zone Zibo255000 China

The demand for self-powered sensing technology and energy harvesting system necessitates high-performance and flexible piezoelectric materials. This paper presents a novel approach utilizing coaxial electrospinning to fabricate all-organic PVDF/PMMA piezoelectric fiber films with a shell-core structure. The resulting fiber films, cut into 2 × 2 cm2 square pieces and hot-pressed every three pieces, demonstrate enhanced piezoelectric properties while retaining high flexibility. The interaction between the -C=O bonds in the PMMA polymer and the -CH2 in PVDF promotes the arrangement of F atoms in PVDF, enhancing the content of the piezoelectric active phase. Additionally, the coaxial electrospinning process fosters vertically oriented hydrogen bonds between PVDF and PMMA, augmenting cross- linking and improving mechanical properties. Notably, when the PVDF to PMMA layer volume ratio is 5:1, the piezoelectric coefficient (|d33|) of the composite fiber film exhibits a significant 60% increase from 10 pC/N in neat PVDF to 16 pC/N. This research holds substantial promise for applications in self-powered sensing and energy harvesting piezoelectric materials. © 2024, The Authors. All rights reserved.

关键词： Piezoelectricity

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Regulating electronic density and interfacial electric field of high-entropy metallenes to enhance oxygen reduction reaction activity

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Chem Catalysis 2025年

作者： Liu, Wenning An, Li Li, Pengfei Fu, Yajie Zhang, Xu Qu, Dan Liu, Yichang Hu, Pu Wang, Xiayan Jiang, Ning Sun, Zaicheng State Key Laboratory of Materials Low-Carbon Recycling Department of Chemistry Institute of Hydrogen Energy Daxing College of Materials Science and Engineering Beijing University of Technology Beijing 100124 China Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Wuhan Institute of Technology 206 Guanggu 1st Road Wuhan 430205 China Beijing Taifeng Xianxing New Energy Technology Co. Ltd. Beijing 102200 China

High-entropy metallenes (HEMs), combining high-entropy alloys and ultrathin nanosheets, exhibit lattice strain, geometric effects, and electronic modulation, enhancing oxygen reduction reaction (ORR) activity. We propose a strategy to manipulate the interfacial electric field and electronic density of states in HEMs by adjusting atomic radius and electronegativity differences. Integrating smaller atomic radius elements (Fe/Co/Ni) with larger ones (Pt/Pd/Mo) increases nanosheet curvature, altering the local electric field. Low-electronegativity Fe/Co/Ni/Mo elements lower the d-band center of Pd, and Pt further decreases it, reducing oxygen intermediate adsorption energy. PtPdFeCoNiMo HEMs, with sub-nanometer thickness, high curvature, microstrain, and optimized electronic structure, achieve ORR mass activity of 1.40 A·mg_Pt⁻¹ at 0.9 V (vs. reversible hydrogen electrode [RHE]) in 0.1 M KOH, 21 times higher than Pt/C. They retain excellent performance after 20,000 cycles, with reduced energy barriers for the rate-determining ORR step. © 2025 Elsevier Inc.

关键词： atomic radius curvature d-band center electrocatalytic oxygen reduction reaction electronegativity electronic regulation high-entropy metallenes local electric field microstrain SDG7: Affordable and clean energy sub-nanometer thickness

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Synthesis of Cr_2AlC from Elemental Powders with Modified Pressureless Spark Plasma Sintering

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Journal of Wuhan University of technology(materials Science) 2019年第2期34卷 287-292页

作者：葛梦妮 WANG Xiaofan LI Gaiye LU Chen 张建峰 TU Rong College of Mechanics and Materials Hohai University State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

We introduced a modified pressureless sintering strategy by SPS with a new T-shape die and tapered punches, which helps the evaporation of melted Al and reduces the sample sticking with the inner wall of the die. Thus, the die breaking risk in the sintering process or the de-molding process is avoided at all. At a low temperature and short holding time, a high purity of Cr_2 AlC was obtained in this SPS process from the optimization of different molar ratios of raw materials. Simultaneously, the high porosity of the as-obtained sample was also a distinguishing feature worth noticing. The reaction mechanism for this process was also discussed in detail. This study presented a new venue for future development of high purity "MAX" materials and others related materials by a modified pressureless sintering strategy.

关键词： pressureless spark plasma sintering Cr2AlC reaction mechanism

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