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Optical and gas sensing properties of mesoporous hollow ZnO microspheres fabricated via a solvothermal method

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Chinese Chemical Letters 2015年第3期26卷 304-308页

作者： Yan Li Dong-Li Li jin-cheng liu College of Science Civil Aviation University of China Materials and Chemical Engineering Hai Nan University

Mesoporous,hollow Zn O microspheres were synthesized via a hydrothermal method,using glycerol and zinc acetate as the starting *** and FESEM analysis showed that the surface morphology of the spheres with a Wurtzite structure could be reasonably adjusted by varying the weight ratio（Rw） of Zn（CH3COO）2 2H2O：H2O：*** responses of the gas sensor based on the spheres to 100 ppm ethanol and 100 ppm acetone are 18.9 and 10.4,*** response and recovery times of the sensor to ethanol and acetone are 2 s and 3 s,3 s and 5 s,*** hollow spheres show an intense UV emission at 392 nm and a broad blue-green emission at 488 ***,a light trapping phenomenon is revealed by UV emission and scattering measurements on the microspheres,which can be attributed to the mesoporous shell and hollow structure of the microsphere.

关键词： hollow spheres hydrothermal microsphere attributed ethanol acetate starting glycerol FESEM

Understanding the hydrogen evolution reaction activity of doped single-atom catalysts on two-dimensional GaPS_(4) by DFT and machine learning

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Journal of Energy Chemistry 2023年第6期81卷 93-100,I0004页

作者： Tianyun liu Xin Zhao Xuefei liu Wenjun Xiao Zijiang Luo Wentao Wang Yuefei Zhang jin-cheng liu College of Physics and Electronic Science Guizhou Normal UniversityGuiyang 550025GuizhouChina Center for Rare Earth and Inorganic Functional Materials School of Materials Science and Engineering&National Institute for Advanced MaterialsNankai UniversityTianjin 300350China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China College of Information Guizhou University of Finance and EconomicsGuiyang 550025GuizhouChina Guizhou Provincial Key Laboratory of Computational Nano-Material Science Guizhou Education UniversityGuiyang 550018GuizhouChina

As a zero-carbon fuel,hydrogen can be produced via electrochemical water splitting using clean electric energy by the hydrogen evolution reaction(HER)*** ultimate goal of HER catalyst is to replace the expensive Pt metal benchmark with a cheap one with equivalent *** this work,we investigated the possibility of HER process on single-atom catalysts(SACs)doped on two-dimensional(2D)GaPS_(4)materials,which have a large intrinsic band gap that can be regulated by doping and tensile *** on the machine learning regression analysis,we can expand the prediction of HER performance to more catalysts without expensive DFT *** electron affinity and first ionization energy are the two most important descriptors related to the HER ***,constrain molecular dynamics with solvation models and constant potentials were applied to understand the dynamics barrier of HER process of Pt SAC on GaPS_(4)*** findings not only provide important insights into the catalytic properties of single-atom catalysts on GaPS_(4)2D materials,but also provides theoretical guidance paradigm for exploration of new catalysts.

关键词： Two-dimensional GaPS_(4) Hydrogen evolution reaction Single-atom catalysis First-principles calculation Machine learning

Lightweight innovation ADIs help development of renewable energy and new technology industries in China

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China Foundry 2024年第5期21卷 507-515页

作者： Qi-dong Yan Xu-dong Gong Wen-bang Gong jin-cheng liu ADI Committee of China Foundry Association Beijing 100000China Yuzhou Henglilai New Materials Co. Ltd.Xuchang 452570HenanChina Kunshan Changjian Foundry Industry Co.Ltd. Kunshan 215311JiangsuChina School of Mechanical Engineering and Automation Wuhan Textile UniversityWuhan 430200China WFO Ferrous Metals Commission Shenyang 110022China

The world is undergoing profound changes in energy and *** are vigorously developing new sustainable energy sources and *** energy sources encompass various technologies such as wind turbines,solar energy,nuclear energy,and ***,emerging technology fields include new energy vehicles,robots,and artificial intelligence devices,among *** renewable energy industries and implementation of new technologies necessitate the development and adoption of new equipment and *** ductile iron(ADI)is renowned for its unique microstructure and superior *** utilizing ADI,lightweight and innovative castings can be designed to not only reduce weight but also save energy and decrease *** importantly,these castings enhance the efficiency and reliability of new energy equipment and emerging technology *** paper describes the development,applications,and future prospects of lightweight and innovative ADI castings within sectors such as solar photovoltaic(PV),wind power generation,industry robots,and trucks in China.

关键词： lightweight ADI renewable energy emission reduction

Dual modification of LiNi_(0.83)Co_(0.11)Mn_(0.06)O_(2) cathode materials by K^(+) doping and Li_(3)PO_(4) coating for lithium ions batteries

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Rare Metals 2024年第7期43卷 3007-3018页

作者： Wei Xiao Jia-Le Wang Zhi-cheng Yi cheng-jin liu Chang Miao Yu Xin Shu-Qing Nie College of Chemistry and Environmental Engineering Yangtze UniversityJingzhou 434023China

Li_(3)PO_(4)@Li_(0.99)K_(0.01)Ni_(0.83)Co_(0.11)Mn_(O.06)O_(2)(NCM-KP) cathode powders are synthesized via K^(+)doping in calcination processes and H_3PO_4 coating in sol-gel processes.K^(+) precisely enters into the lattice to widen the(003) plane to 0.4746 nm with a lower cationic disordered degree of 1.87%.Moreover,the surface residual lithium salts are treated by H_3PO_4 to generate a uniform Li_(3)PO_(4) coating layer of approximately 11.41 nm,which completely covers on the surface of secondary spherical particles to improve the interfacial *** 25℃,the NCM-KP electrode delivers a discharge specific capacity of 148.9 mAh·g^(-1) with a remarkable capacity retention ratio of 84.1% after 200 cycles at 1.0C and retains a high reversible specific capacity of 154.4 mAh·g^(-1) at *** at 1.0C and 60℃,it can maintain a reversible discharge specific capacity of 114.6 mAh·g^(-1) with 0.21% of capacity decay per cycle after 200 cycles,which is significantly lower than 0.40% for the pristine NCM ***,the charge transfer resistance of 238.89 Ω for the NCM-KP electrode is significantly lower than 947.41 Ω for the pristine NCM one by restricting the interfacial side ***,combining K+doping and Li_(3)PO_(4) coating is an effective strategy to enable the significant improvement of the electrochemical property of high-nickel cathode materials,which may be mainly attributed to the widened diffusion pathway and the formed Li_(3)PO_(4) protective layer,thus promoting Li~+diffusion rate and preventing the erosion of HF.

关键词： High-nickel cathode material Residual lithium K^(+)doping Li_(3)PO_(4)coating Lithium ions battery

Theoretical understanding of the stability of single-atom catalysts

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National Science Review 2018年第5期5卷 638-641页

作者： jin-cheng liu Yan Tang Yang-Gang Wang Tao Zhang Jun Li Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education Tsinghua University Department of Chemistry Southern University of Science and Technology Dalian Institute of Chemical Physics Chinese Academy of Sciences

As a new frontier, the rapid development of single-atom catalysts (SACs) in heterogeneous catalysis has attracted extensive attention since the concept of singleatom catalysis was first coined in 2011[1,2]. Supported metal single atoms usually possess unique chemical and physical properties and have a special local chemical environment that is dis-

关键词： Theoretical understanding of the stability of single-atom catalysts Pt

High-performance sandwiched hybrid solid electrolytes by coating polymer layers for all-solid-state lithium-ion batteries

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Rare Metals 2021年第11期40卷 3175-3184页

作者： Zhi-Yan Kou Yan Lu Chang Miao Jie-Qiong Li cheng-jin liu Wei Xiao College of Chemistry and Environmental Engineering Yangtze UniversityJingzhou 434023China School of Mechanical MaterialsMechatronic and Biomedical EngineeringAustralian Institute for Innovative MaterialsInstitute for Superconducting and Electronic MaterialsUniversity of WollongongWollongongNSW 2522Australia

Poly(vinylidenefluoride-co-hexafluoropropylene)(P(VDF-HFP))/Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)(LATP)/P(VDFHFP) sandwiched hybrid solid electrolytes were precisely tailored and successfully fabricated to assemble into allsolid-state lithium-ion batteries,which were systematically evaluated on microstructure,morphology,thermal stability and electrochemical *** sandwiched hybrid solid electrolytes can achieve intimate contact with cathode and anode electrodes to present an excellent interfacial ***,the sandwiched hybrid solid electrolytes possess flexible surface,wide electrochemical working window of 4.7 V,high ionic conductivity of 0.763 mS·cm^(-1) and high thermal stability of 460℃,which may contribute to realizing the practical application in all-solid-state lithium-ion *** assembled cells with the hybrid solid electrolytes can quickly stabilize at a specific discharge capacity of 145.4 mAh·g^(-1) at 0.1 C after only 5 cycles and present admirable rate *** addition,morphology characterizations of the sandwiched hybrid solid electrolytes after long-term cycles show a relatively integrated structure coating with a compact LATP *** investigations afford a promising strategy that the sandwiched hybrid solid electrolytes can overcome the mechanical limitations of the interface between electrodes and inorganic solid electrolytes to provide favorable properties for all-solid-state lithium-ion batteries.

关键词： Sandwiched hybrid solid electrolytes Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3) Polymer layer All-solid-state lithium-ion batteries

Synthesis of New Soluble Polyarylates Containing Phthalazinone Moiety

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Chinese Chemical Letters 2006年第1期17卷 140-142页

作者： Yu Rong GAO jin Yan WANG cheng liu Xi Gao JIAN Department of Polymer Science and Materials Dalian University of Technology Dalian 116012

A novel diacid chloride, 2-（4-chlorocarboxyphenyl）-4-[3,5-dimethyl-4-（4-chlorocarbo-xylphenoxy）phenyl]-2,3-phthalazin-l-one 2, was synthesized and used for the preparation of polyarylates with inherent viscosities of 0.25-0.37 dL·g^-1. The glass transition temperatures of polyarylates were in the range of 217-272℃. The temperatures at 10% weight loss of polyarylates were found to be in the range of 434-464℃ in nitrogen atmosphere and their structure was confirmed by FTIR and IH NMR. The amorphous polyarylates exhibited excellent solubility in a variety of solvents such as NMP, DMAc, DMF and chloroform.

关键词： Polyarylates phthalazinone solubility thermal behavior.

Synthesis of palladium-rare earth alloy as a high-performance bifunctional catalyst for direct ethanol fuel cells

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Nano Research 2024年第11期17卷 9525-9531页

作者： Qingqing Li Chang Sun Xiaolei Sun Zijun Yin Yaping Du jin-cheng liu Feng Luo Tianjin Key Laboratory of Rare Earth Materials and Applications School of Materials Science and Engineering Center for Rare Earth and Inorganic Functional Materials Nankai University Tianjin 300350 China The Experimental High School Attached to Beijing Normal University Beijing 100032 China

Direct ethanol fuel cells (DEFCs) have drawn attention for their simplicity, rapid start-up, high power density and environmental friendliness. Despite these advantages, the widespread application of DEFCs faces challenges, primarily due to the inadequate performance of anode and cathode catalysts. Pd-based materials have shown exceptional catalytic activity for both the ethanol oxidation reaction (EOR) and the oxygen reduction reaction (ORR). Alloying noble metals with rare earth elements has emerged as an effective strategy to further enhance the catalytic activity by modulating the electronic structure. In this study, we synthesized a series of palladium-rare earth (Pd3RE) alloys supported on carbon to serve as bifunctional catalysts that efficiently promote both ORR and EOR. Compared to Pd/C, the Pd3Tb/C catalyst exhibits 3.1-fold and 1.8-fold enhancement in activity for ORR and EOR, respectively. The charge transfer in the Pd3Tb/C results in an electron-rich Pd component, thereby weakening the binding energy with oxygen species and facilitating the two reactions.

关键词： rare earth alloy oxygen reduction reaction ethanol oxidation reaction direct ethanol fuel cells bifunctional electrocatalyst charge transfer

Monte Carlo study of the magnetic properties and magnetocaloric effect of an AFM/FM BiFeO_(3)/Co bilayer

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Communications in Theoretical Physics 2021年第9期73卷 153-164页

作者： Chun-lu Chang Wei Wang He Ma Han Huang jin-cheng liu Rui-ze Geng School of Science Shenyang University of TechnologyShenyang 110870China School of Electrical Engineering Shenyang University of TechnologyShenyang 110870China

The magnetic properties and magnetocaloric effect of an antiferromagnetic/ferromagnetic(AFM/FM)BiFeO_(3)/Co bilayer with mixed-spin(5/2,3/2)have been studied based on Monte Carlo *** magnetization,susceptibility,and critical temperature are investigated under various exchange couplings and an external magnetic *** particular,the influence of exchange couplings and an external magnetic field on the magnetic entropy change,adiabatic temperature change,and the relative cooling power(RCP)are *** simulation results indicated that the decrease of the exchange coupling and the increase of external magnetic fields can cause an increase of magnetic entropy change,adiabatic temperature change,and *** addition,the hysteresis loops of the system are presented for different exchange couplings and temperatures.

关键词： BiFeO_(3)/Co bilayer magnetization critical temperature entropy change hysteresis loops Monte Carlo simulation