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

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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Curvature Conservation and Conduction Modulation for Symmetric Charged Ferroelectric Domain Walls

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SSRN 2024年

作者： Fan, Yuanyuan Liang, Deshan Yang, Huayu Liang, Chen Dong, Shouzhe Gao, Rongzhen Liang, Minchuan Yang, Jia Wang, Yue Ai, Hui Ma, Ji Ma, Jing Zhang, Jinxing Chen, Long-Qing Wang, Jing Nan, Ce-Wen Huang, Houbing Advanced Research Institute of Multidisciplinary Science School of Materials Science and Engineering Beijing Institute of Technology Beijing100081 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China Analysis & Testing Center Beijing Institute of Technology Beijing100081 China School of Material Science and Engineering Kunming University of Science and Technology Yunnan Kunming650093 China Department of Physics Key Laboratory of Multi-scale Spin Physics Ministry of Education Beijing Normal University Beijing100875 China Department of Materials Science and Engineering Pennsylvania State University University ParkPA16802 United States

Curvature conservation is a common feature for the physical properties with topological constraints, from the macroscopic cosmic string loops to the microscopic quantized vortex rings in superfluid. Interestingly, ferroelectric domain-wall curvature is important to determine its conduction, which is the key parameter for designing domain-wall nanoelectronic devices. Here, we demonstrate the curvature conservation of the charged domain walls confined in ferroelectric topological structures with specific domain symmetry by combining piezoelectric force microscopy, conducting atomic force microscopy and phase-field simulations. Significantly, the intrinsic conductivity of the charged domain walls, exhibits an inverse functional relationship with the local domain-wall curvature in the ferroelectric BiFeO3 nano-islands, which can also be precisely and continuously modulated by applying an electric field. This work provides us with an insightful understanding of the conduction mechanism of charged domain walls confined in ferroelectric topological structures with high degree of spatial symmetry, which paves the way for the application of charged domain walls as flexible conducting channels with continuously changing resistance states to be used for ferroelectric domain-wall memristors. © 2024, The Authors. All rights reserved.

关键词： Domain walls

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Balancing *OOH adsorption and Ru O covalency via Ru- d customized engineering to boosted acidic water oxidation

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Chemical Engineering Journal 2025年 518卷

作者： Ao Cai Hongnan Jia Na Luo Wei Pi Xing Wang Fengxiang Chen Na Yao State Key Laboratory of New Textile Materials and Advanced Processing Wuhan Textile University Wuhan Hubei 430200 PR China School of Chemical Engineering ZhengZhou University Zhengzhou Nan He 450001 PR China

Developing a mechanistic regulation strategy and parameter for mechanism transition on ruthenium oxides (RuO 2 )-based catalysts is essential for enhanced acidic oxygen evolution reaction (OER). Herein, employing MRuO x (M = W, Ce, Mn, Ti, Hf and Zr) compounds as model, we focus on fine-tuning Ru- d band center to adjust *OOH adsorption and Ru O covalency, thereby customizing OER mechanism transition. Through integrated analysis of density functional theory (DFT) calculations and experimental results, it can be concluded that as Ru- d band center gradually decreases, the *OOH adsorption and Ru O covalency gradually weaken. Optimal catalytic performance emerge when *OOH adsorption achieves peak values while maintaining inactive lattice oxygen. The screened Ce 0.75 Ru 0.25 O 2 catalysts, with maximizing *OOH binding energy in adsorption evolution mechanism (AEM), exhibiting optimal OER activity and stability. A scalable proton exchange membrane electrolyzer (PEMWE) single cell using this catalyst only requires 1.60 V to reach 1 A cm −2 coupled with remarkable stability exceeding 2000 h.

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Low Viscosity Epoxy Structural Adhesive Cured at Room Temperature for Crack Repair of Subway Tunnel

Low Viscosity Epoxy Structural Adhesive Cured at Room Temper...

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作者： Ming Xiao Xiaojiang Sun Huaqing Rong Shuguang Bi Jiagong Tang Xianmeng Luo Jianhua Ran Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing & Finishing State Key Laboratory of New Textile Materials and Advanced Processing TechnologiesCollege of Chemistry and Chemical EngineeringWuhan Textile University Hubei DaTangAnSheng Construction Engineering Co.Ltd

Epoxy structural adhesive has good mechanical properties,especially high adhesion,low shrinkage rate,and high stability,widely used in steel plate reinforcement,crack repair,bridge splicing,and concrete bonding,***,due to the high cross-linking density and high internal stress after curing,its shortcomings,such as brittleness,the poor performance of fatigue resistance and heat resistance,limit its application in special track *** this work,two kinds of epoxy structural adhesives(EPA-1,EPA-2) with low viscosity and room temperature curing were synthesized by selecting different bisphenol A epoxy resin and active diluent as component A and modified amine curing agent as component *** results showed that EPA-1 and EPA-2 presented significant toughness compared with the classic construction adhesive(AralditeXH160).The yield strengths of EPA-1 and EPA-2 were 4.88 MPa and 13.13 MPa,and the shear strengths were 11.93 MPa and 13.08 MPa,respectively,showing good adhesive *** addition,the viscosities of EPA-1 and EPA-2 were 127 mPa·s and 308 m Pa·s,respectively,and their decomposition temperatures were all above ～280 ℃,which indicated that the self-made epoxy structural adhesives could be used for the repair of cracks in the vibration subway tunnel.

关键词： Epoxy structural adhesive low viscosity room temperature curing crack repair subway tunnel

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Galvanic replacement reaction for in situ fabrication of litchi-shaped heterogeneous liquid metal-Au nano-composite for radio-photothermal cancer therapy

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Bioactive materials 2021年第3期6卷 602-612页

作者： Zhenhu Guo Jingsong Lu Dan Wang Wensheng Xie Yongjie Chi Jianzhong Xu Nonaka Takuya Junxin Zhang Wanling Xu Fei Gao Hong Wu Lingyun Zhao State Key Laboratory of Powder Metallurgy Powder Metallurgy Research InstituteCentral South UniversityChangshaHunan410083China Key Laboratory of Advanced Materials Ministry of Education of ChinaSchool of Materials Science and EngineeringTsinghua UniversityBeijing100084China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Research Center of Magnetic and Electronic Materials College of Materials Science and EngineeringZhejiang University of TechnologyHangzhouZhejiang310014China Department of Nanoengineering Chemical Engineering Programand Moores Cancer CenterUniversity of California San DiegoLa JollaCA92093United States The Key Laboratory of Bioorganic Phosphorus Chemistry&Chemical Biology(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing100084China School of Earth Sciences and Resources China University of Geosciences(Beijing)Beijing100083China Shaanxi University of Chinese Medicine Xi'anShanxi712046China

With tremendous research advances in biomedical application,liquid metals(LM)also offer fantastic chemistry for synthesis of novel ***,as a pioneering trial,litchi-shaped heterogeneous eutectic gallium indium-Au nanoparticles(EGaIn-Au NPs),served as effective radiosensitizer and photothermal agent for radio-photothermal cancer therapy,have been successfully prepared using in situ interfacial galvanic replacement *** enhanced photothermal conversion efficiency and boosted radio-sensitization effect could be achieved with the reduction of Au nanodots onto the eutectic gallium indium(EGaIn)NPs *** importantly,the growth of tumor could be effectively inhibited under the combined radio-photothermal therapy mediated by EGaIn-Au *** by this approach,in situ interfacial galvanic replacement reaction may open a novel strategy to fabricate LM-based nano-composite with advanced multi-functionalities.

关键词： Au nanodots Gallium Galvanic replacement reaction Indium Radio-photothermal therapy

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Ru-modified NiO electrocatalysts for HER: Lower energy barriers and prolonged stability

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Chinese Chemical Letters 2025年

作者： Li Luo Xiaohong Cheng Qi Wu State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan 430200 China College of Physical Science and Technology Central China Normal University Wuhan 430079 China Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and Science Xiangyang 441053 China

The hydrogen evolution reaction (HER) is a key process in electrocatalytic water splitting for hydrogen production, yet it is often limited by sluggish H*-OH adsorption and H* binding kinetics. We obtained Ru-modified NiO nanoparticles (Ru-NiO/NF) with enhanced HER properties by substituting Ruthenium (Ru) for Ni atoms in the NiO (200) crystalline facets on nickel foam by a one-step electrodeposition technique. This novel catalyst exhibits a significantly reduced *H-OH adsorption energy and improved kinetics, with an overpotential of only 60 mV at 10 mA/cm 2 and a Tafel slope of 26.19 mV/dec. The Ru-NiO/NF maintains its activity for over 115 h, outperforming NiO/NF by reducing the overpotential by 177 mV. DFT calculations confirm that the addition of Ru to NiO enhances the HER kinetics by modifying the electronic structure, optimizing the surface chemistry, stabilizing the intermediates, lowering the energy barriers, and facilitating efficient charge transfer through a robust three-dimensional structure, resulting in a change in the rate-limiting step and a significant reduction in the Gibbs free energy. This study presents a highly efficient HER catalyst and offers insights into designing advanced NiO-based electrocatalysts by reducing reaction energy barriers.

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Polyethylene Terephthalate Ammonia Hydrolysate Greatly Increased Bacterial Cellulose Production

SSRN

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SSRN 2022年

作者： Sun, Su Ullah, Mati Wang, Quan Zhang, Yanbo Chen, Li Ullah, Muhammad Wajid Zhou, Jiangang State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China College of Life Science and Technology Huazhong University of Science and Techn ology Wuhan430074 China Central China Normal University Library Wuhan430079 China Biofuels Institute School of the Environment and Safety Engineering Jiangsu University Zhenjiang212013 China

A major challenge to large-scale production and utilization of bacterial cellulose (BC) for various applications is its low yield and productivity by bacterial cells and the high cost of feedstock. A supplementation of the classical expensive Hestrin and Schramm (HS) medium with 1% polyethylene terephthalate ammonia hydrolysate (PETAH) resulted in as high as 215% yield. Although the physicochemical properties of BC were not significantly influenced, the BC produced in PETAH-supplemented HS medium showed a lower degree of crystallinity, and higher surface area, which showed 1.66 times higher adsorption capacity for tetracycline than BC produced in HS medium. The PETAH-supplemented HS medium respectively enhanced the activity of α-UDP-glucose pyrophosphorylase and α-phosphoglucomutase by 30.63% and 135.24% and decreased the activity of pyruvate kinase and phosphofructokinase by 40.34% and 52.63%. The results of this study provide insights into the activation mechanism of Taonella mepensis by PETAH supplementation for high productivity of BC. © 2022, The Authors. All rights reserved.

关键词： Productivity

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Green N1 Additive Modified Perovskite Precursor Enables Effective Manufacturing of Large-Area Solar Cell Modules with High Efficiency and Stability

SSRN

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SSRN 2023年

作者： Zang, Yue Shao, Tianxiang Jiao, Chuanjia Zhou, Peng Li, Wangnan Cheng, Jiahao Yang, Gaoyuan Tu, Yibo Ye, Jingchuan Li, Guodong Chu, Liang Lu, Shaojian Liang, Guijie Liang, Ying Wang, Jingyang Zhong, Zhicheng Hu, Run Yan, Wensheng Institute of Carbon Neutrality and New Energy School of Electronics and Information Hangzhou Dianzi University Hangzhou310018 China Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and Science Xiangyang441053 China Hubei Longzhong laboratory Xiangyang441000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hubei Institute of Aerospace Chemotechnology Xiangyang441003 China School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan430074 China

Perovskite solar cells (PSCs) have been continuously breaking the solar photoelectric power conversion efficiency (PCE) record, while two long-standing challenges remain formidable on the practical commercialization path of PSCs, i.e. effective large-area manufacturing and high device operational stability. Here, we report a green additive of N-methyl-2-piperidone (N1) to modify the perovskite precursor, enabling the one-step mass manufacturing of high-quality large-area perovskite films with enhanced PCE and operational stability. The results show that due to the stronger complexation ability of N1 additive with PbI2, the generated PbI2-N1 complex can effectively prevent the preferential nucleation and realize lead halide-framework template-assistant crystallization reaction with organic cation in the one-step solution preparation of perovskite (FAPbI3)0.95(MAPbBr3)0.05 thin films, which result in the uniform grain size and smooth, dense film quality. Therefore, the PSCs device with small active area of 0.09 cm2 exhibits an efficiency of 22.2%, which is further improved to 23.2% by passivating the perovskite interface using PEAI. Moreover, highly-efficient slot-die printed 5×5 cm2 PSC module has been obtained with a champion PCE of 21% and improved operational stability over 1000 h. This work demonstrated a new strategy to realize high-quality large-scale perovskite films for solution-processed PSC modules, and may be further improved and extended to other kinds of PSCs and perovskite light-emitting diodes and detectors. © 2023, The Authors. All rights reserved.

关键词： Nucleation

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Engineering materials and structural paradigms for mid-infrared thermal management

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materials Today Energy 2025年 52卷

作者： Huang, Jingru Tian, Haoran Zhang, Hanyuan Huang, Zhenhui Long, Yi Xu, Weilin Zhou, Zhengui Wan, Jun State Key Laboratory of New Textile Materials and Advanced Processing School of Chemistry and Chemical Engineering Wuhan Textile University Wuhan 430200 China Department of Electronic Engineering The Chinese University of Hong Kong New Territories 999077 Hong Kong

Addressing global climate change and resource scarcity's dual pressures requires innovative thermal management technologies to enhance energy efficiency and sustainability. Mid-infrared dynamic control plays a pivotal role in advancing thermal management technologies by facilitating efficient radiative cooling and heating, thereby enhancing energy conservation and optimizing thermal regulation in diverse applications. However, current research predominantly emphasizes device architecture over the essential relationship between material structure and function, leading to ambiguity in the selection of materials for specific dynamic applications. This review provides an in-depth analysis from a materials science perspective, systematically categorizes mid-infrared dynamic materials including thermally, electrically, mechanically, and other mechanism-induced materials, and discusses their structural properties, preparation methods, and practical performance. By exploring the intricate interplay between material, structure, and mid-infrared performance in typical applications such as radiative cooling, heating, and dynamic radiation regulation, novel insights into optimizing material selection and design are offered. The materials-focused perspective underscores the importance of understanding the structure-function relationship to enhance application performance, aiming to inspire future research and practical advancements in high-performance, energy-efficient thermal management technologies. © 2025 Elsevier Ltd

关键词： Dynamic radiation regulation Mid-infrared Radiative cooling Radiative heating Thermal management

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High efficiency dual-band coding reflection metasurface in terahertz bands

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Optics Communications 2025年 587卷

作者： Chen, Ge Han, Weijia Liang, Wendong Chen, Bingxuan Zhang, Bohan Wei, Guochao Zhu, Wei Wang, Shengxiang State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China School of Mathematical and Physical Sciences Wuhan Textile University Wuhan430200 China School of Physical Science and Technology Northwestern Polytechnical University Xi'an710072 China

Here, we introduce a Terahertz (THz) dual-band coding reflective metasurface based on the Pancharatnam-Berry (PB) phase theory. The coding metasurface is consisted of a metal layer with hollow opening resonant ring on top of a double I-shaped deformation structure as the modified Polyimide (MPI) dielectric layer with a bottom reflective layer. It is capable of independent operation at two specific frequency bands of 0.33 THz and 0.51 THz. The high frequency double I-shaped deformation structure and the low frequency openwork resonant ring in the metal layer could be rotated and adjusted by PB phase theory to realize the continuous phase control from 0 to 2π. The coded cell at specific angles could construct coding arrays, achieving the modulation of wavefront. Due to the introduction of various encodings, the proposed metasurface enables to play a role as a vortex light generator at 0.33 THz, while it can act as a Radar Cross-section (RCS) reduction device to suppress the specular reflection of THz circularly polarized light at 0.51 THz. The simulated results show that the coding metasurface can work independently in low-frequency mode and high-frequency mode. In addition, the flexibility of the MPI layer indicates that the proposed metasurface has great potential for the integration of devices in the field of 6G communication and invisible coating. © 2025

关键词： Terahertz waves

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