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SSRN 2023年

作者： Ren, Xiaohui Xu, Feicui Chen, Rongsheng Ma, Feng Shi, Li Liu, Huating Ren, Long Zhang, Hua Ni, Hongwei Xie, Zhongjian The State Key Laboratory of Refractories and Metallurgy Faculty of Materials Wuhan University of Science and Technology Wuhan430081 China Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics Collaborative Innovation Center for Optoelectronic Science and Technology Key Laboratory of Optoelectronic Devices and Systems Ministry of Education and Guangdong Province Shenzhen University Shenzhen518060 China Institute of Advanced Materials and Nanotechnology School of Chemistry and Chemical Engineering Wuhan University of Science and Technology Wuhan430081 China School of Materials Science and Chemical Engineering Ningbo University Zhejiang Ningbo315211 China School of Electrical and Electronic Engineering Wuhan Polytechnic University Wuhan430023 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Institute of Pediatrics Shenzhen Children's Hospital Shenzhen518038 China

Photoelectrochemical (PEC) sensing platforms demonstrate outstanding performances towards enzyme-free glucose detection, and exploring glucose reactive electrodes with efficient active sites and enhanced carrier transport/separation behavior would be beneficial for PEC glucose detection. Herein, we fabricated two-dimensional Cu3(PO4)2 nanosheets as the photoactive material for glucose detection. The morphology and structural characterizations prove the existence of balanced Cu0–Cu+ active sites which has been regarded as the key factor on improving PEC performance for fast glucose detection. The photoelectric current of Cu3(PO4)2 nanosheets peeled from Cu3(PO4)2 bulk is three times that of 0 µM at 50 µM, and the response performance is increased by ~9 times compared to Cu3(PO4)2 bulk. Under light conditions, the limit of detection (LOD) as low as 17.68 µM at low concentrations of 20-100 µM, and LOD of 131.69 µM at high concentrations of 100-1000 µM can be achieved. This work might provide the basic understanding and new opportunities in applying two-dimensional Cu3(PO4)2 nanosheets for glucose detection. © 2023, The Authors. All rights reserved.

关键词： Copper compounds

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Robust MOF-253-derived N-doped carbon confinement of Pt single nanocrystal electrocatalysts for oxygen evolution reaction

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Chinese Journal of Catalysis 2020年第5期41卷 839-846页

作者： Hellen Gabriela Rivera Monestel Ibrahim Saana Amiinu Andrés Alvarado González Zonghua Pu BibiMaryam Mousavi Shichun Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina School of Chemistry Chemical Engineering and Life SciencesWuhan University of TechnologyWuhan 430070HubeiChina

Although carbon-supported platinum(Pt/C) is still considered the most active electrocatalyst for hydrogen evolution reaction(HER) and oxygen reduction reaction(ORR), its applications in metal–air batteries as a cathode catalyst, or for oxygen generation via water splitting electrolysis as an anode catalyst is mainly constrained by the insufficient kinetic activity and stability in the oxygen evolution reaction(OER). Here, MOF-253-derived nitrogen-doped carbon(N/C)-confined Pt single nanocrystals(Pt@N/C) have been synthesized and shown to be efficient catalysts for the OER. Even with low Pt mass loading of 6.1 wt%(Pt@N/C-10), the catalyst exhibits greatly improved activity and long-time stability as an efficient OER catalyst. Such high catalytic performance is attributed to the core-shell structure relationship, in which the active N-doped-C shell not only provides a protective shield to avoid rapid Pt nanocrystal oxidation at high potentials and inhibits the Pt migration and agglomeration, but also improves the conductivity and charge transfer kinetics.

关键词： Pt MOF-253 Carbon confinement Oxygen evolution reaction Electrocatalyst

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The Effect of Increasing Water on the Physicochemical Features of Thymol: Dl-Menthol

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SSRN 2024年

作者： Garmroodi, Mahshad Vakili Sardroodi, Jaber Jahanbin Jahanbin, Jaber Jahanbakhsh Bonab, Parisa Verport, Francis Azarbaijan Shahid Madani University Iran Department of Chemistry Faculty of Basic Sciences Azarbaijan Shahid Madani University Tabriz Iran Azarbaijan Shahid Madani University Tabriz Iran State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China 6 Miklukho-Maklaya Str. Moscow117198 Russia National Research Tomsk Polytechnic University Lenin Avenue 30 Tomsk634050 Russia

Expanding uses of ionic liquids and their analogs, specifically Deep Eutectic Solvents (DES), necessitate an examination of the impact of moisture content on their physicochemical features. Although these liquids are typically synthesized in moisture-controlled environments to mitigate the influence of moisture on their properties, precise studies on this topic are lacking. In this study, we investigated the influences of water on a Type-V DES made of dl-menthol and thymol in a 1:1 ratio. We conducted tests to ascertain the physical features, including the density of the DES solution. We viewed linear modifications in density with increasing water content;however, the alteration in density was ***, molecular dynamics simulations were applied to examine the intermolecular interactions of DES and solutions of DES. The simulations highlighted the importance of dl-menthol-thymol interactions in explaining the DESs that have low melting points. In the attendance of water, the DES components are hydrated. Furthermore, the simulations helped categorize the influences of water into various systems. At little water content, DLM-DLM and Thy-Thy interactions are increased, as exposed by hydrogen bond examination. The DES6 (80% water), DES constituents are separately hydrated and exhibit varied diffusivity, mirrored in changes in haulage features. The outcomes represented in this study supply useful intelligence on aqueous solutions of DES, both in experimental information and molecular sights. We hope these findings could aid in developing further applications for this DES and related DES. © 2024, The Authors. All rights reserved.

关键词： Hydrogen bonds

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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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Confined Heterojunction in Hollow-Structured TiO2and Its Directed Effect in Photodriven Seawater Splitting

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ACS Nano 2023年第18期17卷 18217-18226页

作者： Shi-Tian Xiao Si-Ming Wu Lu Wu Yu Dong Jia-Wen Liu Li-Ying Wang Xin-Yi Chen Yi-Tian Wang Ge Tian Gang-Gang Chang Menny Shalom Paolo Fornasiero Xiao-Yu Yang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & School of Chemistry Chemical Engineering and Life Sciences & Shenzhen Research Institute & Laoshan Laboratory Wuhan University of Technology Wuhan 430070 China Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules College of Chemistry and Chemical Engineering Hubei University Wuhan 430062 China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics National Center for Magnetic Resonance in Wuhan Wuhan Institute of Physics and Mathematics Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan 430071 China Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology Ben-Gurion University of the Negev Beer-Sheva 8410501 Israel Department of Chemical and Pharmaceutical Sciences University of Trieste and ICCOM-CNR and INSTM Trieste Research Units Via L. Giorgieri 1 34127 Trieste Italy

The high salinity of seawater often strongly affects the activity and stability of photocatalysts utilized for photodriven seawater splitting. The current investigation is focused on the photocatal...

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19.59%Efficiency from Rb_(0.04)-Cs_(0.14)FA_(0.86)Pb(Br_(y)I_(1−y))_(3) perovskite solar cells made by vapor-solid reaction technique

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Science Bulletin 2021年第10期66卷 962-964,M0003页

作者： Long Luo Zhiliang Ku Weixi Li Xin Zheng Xiong Li Fuzhi Huang Yong Peng Liming Ding Yi-Bing Cheng State Key Laboratory of Advanced Technologies for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528216China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China

Organic-inorganic hybrid perovskite materials have recently attracted extensive attentions because of their intriguing optoelectronic properties for photovoltaics[1],[2],[3].The power conversion efficiency(PCE)of pero... 详细信息

关键词：太阳电池离子迁移钙钛矿薄膜气相反应迁移速率组件效率反应工艺

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Oxygen vacancies in metal oxides: recent progresstowards advanced catalyst design

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Science China materials 2020年第11期63卷 2089-2118页

作者： Guoxin Zhuang Yawen Chen Zanyong Zhuang Yan Yu Jiaguo Yu College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108China Key Laboratory of Advanced Materials Technologies(Fuzhou University) Fujian Province UniversityFuzhou 350108China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Energy crisis and environmental problems urgently drive the proposal of new strategies to improve human wellbeing and assist sustainable *** this end,scientists have explored many metal oxides-based photocatalysts with high stability,low cost,earth abundance,and potentially high catalytic activity relevant for key applications such as H2O splitting,CO2 reduction,N2 fixation,and advanced oxidation of *** these metal oxides,oxygen vacancies(OVs)are ubiquitous and intrinsic defects with pronounced impacts on the physicochemical properties of the catalysts,which may open new opportunities for obtaining efficient metal *** thorough understanding of the structural and electronic nature of OVs is necessary to determine how they serve as catalytically active *** this review,we summarize the origin of OVs,the strategies to introduce OVs,as well as the fundamental structure-activity relationships to relate these crystal defects to catalyst properties including light absorption,charge separation,*** emphasize the mechanism of OVs formation and their effects on the intrinsic catalytic characteristics of the metal *** also present some multicomponent catalytic platforms where OVs contribute to catalysis via ***,opportunities and challenges on engineering defects in photocatalysts are summarized to highlight the future directions of this research field.

关键词： oxygen vacancy catalysis defect engineering energy and environment metal oxide

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Novel N-Alkylation Synthetic Strategy of Imidazolium Cations Grafted Polybenzimidazole for High Temperature Proton Exchange Membrane Fuel Cells

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SSRN 2022年

作者： Wang, Jian Liu, Guoliang Wang, Ailian Ji, Wenxi Zhang, Longgui Zhang, Taoyi Li, Jing Zhang, Hongfei Tang, Haolin Zhang, Haining State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Nr. 122 Luoshi Rd. Wuhan430070 China Foshan Xianhu Laboratory The Advanced Energy Science and Technology Guangdong Laboratory Foshan528200 China Research Institute of Chemical Industry Co. Ltd Beijing100013 China

Development of simple synthetic strategy of polybenzimidazole-based membranes with high uptake and retention ability of phosphoric acid is essential for long-term practical applications of high temperature proton exchange membrane fuel cells. In this work, N, N-dimethylacetamide is used as both deacid reagent and solvent for N-alkylation reaction to form imidazolium cations-grafted polybenzimidazole. The accordingly formed membranes exhibit an improved uptake and retention ability of phosphoric acid compared to pristine polybenzimidazole membrane. The optmized membrane with 60% of grafting degree has an acid uptake of 361.2 wt% with an anhydrous proton conductivity of 75.2 mS cm-1 at 160 oC, about 4.2 times higher than that of pristine polybenzimidazole membrane. After the acid retention test at 160 oC for 240 h, proton conductivity of the optimized membrane decreases by 7.5%, lower than that for pristine polybenzimidazole membrane under the same conditions (11.9% loss). The thus-assembled single cell delivers the power density of 0.430, 0.599 and 0.712 W cm-2 under 0, 100 and 200 kPa back pressures whereas the values are 0.321, 0.428 and 0.512 W cm-2 for the cell assembled from phosphoric acid-doped pristine polybenzimidazole membrane. © 2022, The Authors. All rights reserved.

关键词： Membranes

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Twin-Induced Tensile Strengthening in a Laser Powder Bed Fusion Manufactured Haynes 188 Alloy by Heat Treatment

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SSRN 2022年

作者： Liu, Yang Huang, Zhifeng Zhang, Chi Lu, Jiaqi Ouyang, Ni Shen, Qiang Chen, Fei State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China International School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Hubei Longzhong Laboratory Xiangyang441106 China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Guangdong Chaozhou521000 China

Co and Ni superalloys have been widely used in aerospace. Abundant studies have been focused on additive manufactured Ni superalloys. However, the equally important Co superalloy has less been fabricated by additive manufacturing. In this work, Haynes 188 alloy, a kind of Co-based superalloy, is fabricated by using laser powder bed fusion. The microstructure and mechanical properties before and after heat treatment of the additive manufactured Haynes 188 alloys are investigated in detail. For the as-built specimen without heat treatment, the thermodynamic modeling predicts that eutectic carbides of M6C/M23C6 exist in the specimen, which is confirmed by the TEM EDS mapping result and SAED patterns. Arrayed stacking faults, dislocations, and M6C/M23C6 carbides are found in the specimen without heat treatment. The yield strength, ultimate tensile strength, and elongation of the specimen without heat treatment are 645 MPa, 928 MPa, and 57.3%, respectively. For the heat-treated specimen, the dislocation density is reduced, and the eutectic carbides are dissolved into the matrix, resulting in reducing the yield strength to 485 MPa. However, annealing twins can be found in the heat-treated specimen, and the twin-twin interaction between annealing twins and deformation twins enhances the pile-up of dislocations during the deformation. As a result, the ultimate tensile strength and elongation increase to 1001 MPa and 68.1%, respectively. The mechanical properties of fabricated Haynes 188 alloys in this work are superior to that of the published Ni or Co superalloys. This work provides an effective method to improve the mechanical properties of Co superalloys by additive manufacturing, which is important for the development of high-performance superalloys and their manufacturing methods. © 2022, The Authors. All rights reserved.

关键词： Precipitation (chemical)

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Self-supported high-entropy alloy electrocatalyst for highly efficient H_(2) evolution in acid condition

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Journal of Materiomics 2020年第4期6卷 736-742页

作者： Peiyan Ma Mingming Zhao Long Zhang Heng Wang Junfeng Gu Yuchen Sun Wei Ji Zhengyi Fu School of Chemistry Chemical Engineering and Life scienceWuhan University of TechnologyWuhan CityHubei ProvincePR China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan CityHubei ProvincePR China Engineering Research Center of Environmental Materials and Membrane Technology School of Materials Science and EngineeringWuhan Institute of TechnologyWuhan CityHubei ProvincePR China

Developing non-precious catalysts as Pt substitutes for electrochemical hydrogen evolution reaction(HER)with superior stability in acidic electrolyte is of critical importance for large-scale,low-cost hydrogen production from ***,we report a CoCrFeNiAl high-entropy alloy(HEA)electrocatalyst with self-supported structure synthesized by mechanical alloying and spark plasma sintering(SPS)*** HEA after HF treatment and in situ electrochemical activation for 4000 cycles of cyclic voltammetry(HF-HEAa2)presents favourable activity with overpotential of 73 mV to reach a current density of 10 mA cm^(2) and a Tafel slope of 39.7 mV dec*** alloy effect of Al/Cr with Co/Fe/Ni at atomic level,high-temperature crystallization,as well as consolidation by SPS endow CoCrFeNiAl HEA with high stability in 0.5 M H2SO4 *** superior performance of HF-HEAa2 is related with the presence of metal hydroxides/oxides groups on HEA.

关键词： loy Hydrogen evolution reaction Electrocatalysts Acidic electrolyte Stability

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