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Selective oxidation of propane to acrylic acid over mixed metal oxide catalysts

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Journal of Natural Gas Chemistry 2008年第2期17卷 191-194页

作者： Wei Zheng Zhenxing Yu Ping Zhang Yuhang Zhang Hongying Fu Xiaoli Zhang Qiquan Sun xinguo hu School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150001 Heilongjiang China Daqing Petroleum Co Ltd Daqing 163453 Heilongjiang China

The effects of metal atomic ratio, water content, oxygen content, and calcination temperature on the catalytic performances of MoVTeNbO mixed oxide catalyst system for the selective oxidation of propane to acrylic acid have been investigated and discussed. Among the catalysts studied, it was found that the MoVTeNbO catalyst calcined at a temperature of 600 ℃ showed the best performance in terms of propane conversion and selectivity for acrylic acid under an atmosphere of nitrogen. An effective MoVTeNbO oxide catalyst for propane selective oxidation to acrylic acid was obtained with a combination of a preferred metal atomic ratio （Mo1V0.31Te0.23Nb0.12）. The optimum reaction condition for the selective oxidation of propane was the molar ratio of C3H8 ：O2 ： H2O ： N2 = 4.4： 12.8 ： 15.3 ： 36.9. Under such conditions, the conversion of propane and the maximum yield of acrylic acid reached about 50% and 21%, respectively.

关键词： propane oxidation catalysts preparation acrylic acid selective oxidation

Antagonism effect of residual S triggers the dual-path mechanism for water oxidation

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Journal of Energy Chemistry 2024年第6期93卷 568-579,I0014页

作者： Li Liu Jinming Cao Siqi hu Tinghui Liu Can Xu Wensheng Fu xinguo Ma Xiaohui Yang Chongqing Key Laboratory of Green Catalytic Materials and Technology College of ChemistryChongqing Normal UniversityChongqing 401331China School of Science Hubei University of TechnologyWuhan 430068HubeiChina Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China

Transition metal chalcogenides(TMCs)are recognized as pre-catalysts,and their(oxy)hydroxides derived from electrochemical reconstruction are the active species in the water oxidation.However,understanding the role of the residual chalcogen in the reconstructed layer is lacking in detail,and the corresponding catalytic mechanism remains controversial.Here,taking Cu_(1-x)Co_(x)S as a platform,we explore the regulating effect and existence form of the residual S doped into the reconstructive layer for oxygen evolution reaction(OER),where a dual-path OER mechanism is proposed.First-principles calculations and operando~(18)O isotopic labeling experiments jointly reveal that the residual S in the reconstructive layer of Cu_(1-x)Co_(x)S can wisely balance the adsorbate evolution mechanism(AEM)and lattice oxygen oxidation mechanism(LOM)by activating lattice oxygen and optimizing the adsorption/desorption behaviors at metal active sites,rather than change the reaction mechanism from AEM to LOM.Following such a dual-path OER mechanism,Cu_(0.4)Co_(0.6)S-derived Cu_(0.4)Co_(0.6)OSH not only overcomes the restriction of linear scaling relationship in AEM,but also avoids the structural collapse caused by lattice oxygen migration in LOM,so as to greatly reduce the OER potential and improved stability.

关键词： Electrochemical reconstruction Adsorbate evolution mechanism Lattice oxygen oxidation mechanism Oxygen evolution reaction Residual sulfur

1,3-dioxolane pretreatment to improve the interfacial characteristics of a lithium anode

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Rare Metals 2006年第4期25卷 297-302页

作者： DING Fei LIU Yuwen hu xinguo Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Research Centre JJJ Battery Co. Lid. Jiangmen 529000 China

1,3-dioxolane （DOL） was originally used to pretreat a lithium metal electrode to improve its interfacial characteristics. Electrochemical impedance spectra （EIS） meastLrements revealed that, after the DOL pretreatment, the lithium electrode had better interfacial stability during immersion in electrolyte and as repeated charge/discharge cycles. It was proved by SEaM that the pretreated one has smoother morphology and less dendrite after repeated charge/discharge cycles. Consequentially, benefiting from the better interface characteristics of the lithium electrode, the rechargeable lithium cell with a DOL-pretreated lithium anode had the obviously enhanced discharging performance and better cyclability.

关键词： lithium battery interfacial stability 1,3-dioxolane pretreatment EIS

Synthesis and physicochemical properties of LiLa_(0.01)Mn_(1.99)O_(3.99)F_(0.01) cathode materials for lithium ion batteries

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Rare Metals 2008年第5期27卷 496-501页

作者： YI Tingfenga ZHOU Anna Zhu Yanrong Zhu Rongsun hu xinguo School of Chemistry and Chemical Engineering A nhui University of Technology Ma＇anshan 243002 China Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China

Spinel lithium manganese oxide cathode materials were synthesized using the ultrasonic-assisted sol-gel method. The synthesized samples were investigated by differential thermal analysis （DTA） and thermogravimetry （TG）, powder X-ray diffraction （XRD）, scanning electron microscopy （SEM）, cyclic voltammetry （CV）, and the charge-discharge test. TG-DTA shows that significant mass loss occurs in two temperature regions during the synthesis of LiLa0.01Mn1.9903.99F0.01. XRD data indicate that all samples exhibit the same pure spinel phase, and LiLa0.01Mn1.9903.99F0.01 and LiLa0.01Mn1.9904 samples have a better crystallinity than LiMn2O4. SEM images indicate that LiLa0.01Mn1.9903.99F0.01 has a slightly smaller particle size and a more regular morphology structure with narrow size distribution. The charge-discharge test reveals that the initial capacities of LiMn2O4, LiLa0.01Mn1.99O4, and LiLa0.01Mn1.99O3.99F0.01 are 130, 123, and 126 mAh·g^-1, respectively, and the capacity retention rates of the initial value, after 50 cycles, are 84.8%, 92.3%, and 92.1%, respectively. The electrode coulomb efficiency and CV reveal that the electrode synthesized by the ultrasonic-assisted sol-gel （UASG） method has a better re- versibility than the electrode synthesized by the sol-gel method.

关键词： lithium ion batteries cathode material lithium manganese oxide synthesis physicochemical properties

Powder electrochemical properties with different particle sizes of spinel LiAl_(0.05)Mn_(1.95)O_4 synthesized by sol-gel method

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Rare Metals 2007年第4期26卷 330-334页

作者： YI Tingfeng WANG Dianlong GAO Kun hu xinguo Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China School of Chemistry and Chemical Engineering Anhui University of Technology Maanshan 243002 China

An Al-doped spinel lithium manganese oxide was prepared by the adipic acid-assisted sol-gel method at 800℃, and the cathode materials （Liml0.05Mnl.9504） with different particle sizes were obtained through ball milling. The effects of particle size on the electrochemical performance of LiAl0.05Mnl.9504 samples were investigated by differential thermal analysis and thermogravimetry, X-ray diffraction, galvanostatic charge-discharge test, cyclic voltammetry, and electrochemical impedance spectroscopy. The results indicate that all samples with different particle sizes show the same pure spinel phase and good crystal structure; LiAlo.osMnl.9504 with Dso = 17.3 μm shows better capacity retention; LiAlo.osMnl.gsO4 cathode materials with small particle size have a bigger resistance of charge transfer than the large one, and the particle size has significant effects on the electrochemical performance of Al-doped spinel LiMn2O4 cathode materials.

关键词： lithium ion battery LiAl0.05Mn1.95O4 electrochemical properties particle size

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稀土掺杂在锂离子电池中的应用进展

稀有金属材料与工程 2006年第A2期35卷 9-12页

作者：伊廷锋胡信国高昆哈尔滨工业大学黑龙江哈尔滨150001

阐述了锂离子电池技术发展的重要性,综述了稀土掺杂在锂离子电池正极材料、负极材料及固体电解质中的应用。重点介绍了稀土掺杂在锂离子电池正极材料中的应用,并提出稀土掺杂有利于电池比容量的提高,从而有利于进一步提高锂离子电池的... 详细信息

阐述了锂离子电池技术发展的重要性,综述了稀土掺杂在锂离子电池正极材料、负极材料及固体电解质中的应用。重点介绍了稀土掺杂在锂离子电池正极材料中的应用,并提出稀土掺杂有利于电池比容量的提高,从而有利于进一步提高锂离子电池的比能量和循环性能。展望了稀土掺杂在锂离子电池中的发展前景,并认为这些技术将是未来锂离子电池研究的重要方向。

关键词：锂离子电池正极材料负极材料电解质稀土掺杂

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泡沫材料的最新研究进展

稀有金属材料与工程 2005年第3期34卷 337-340页

作者：戴长松张亮王殿龙胡信国哈尔滨工业大学黑龙江哈尔滨150001

综述了泡沫铝、泡沫钛、泡沫硅和泡沫铅等材料的制备方法,以及如何控制材料的组成和孔隙率来制备不同性能的材料,重点介绍了这些泡沫材料在汽车工业、人体植入材料、光学材料、微电子、计算机和铅酸电池等方面表现出来的优异性能,并展... 详细信息

综述了泡沫铝、泡沫钛、泡沫硅和泡沫铅等材料的制备方法,以及如何控制材料的组成和孔隙率来制备不同性能的材料,重点介绍了这些泡沫材料在汽车工业、人体植入材料、光学材料、微电子、计算机和铅酸电池等方面表现出来的优异性能,并展望其广阔的市场前景。

关键词：泡沫铝泡沫钛泡沫硅泡沫铅泡沫材料

5V锂离子电池尖晶石正极材料LiM_(0.5)Mn_(1.5)O_4的研究评述

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稀有金属材料与工程 2006年第9期35卷 1350-1353页

作者：伊廷锋胡信国霍慧彬高昆哈尔滨工业大学黑龙江哈尔滨150001

评述了锂离子电池锰酸锂正极材料的重要性,介绍了3d-过渡金属离子(Cr3+,Ni2+,Cu2+,Fe3+)掺杂在锰酸锂正极材料中的应用。研究了3d-过渡金属离子掺杂对锰酸锂正极材料结构和电化学性能的影响,并提出了其影响锂离子电池充放电和循环性能... 详细信息

评述了锂离子电池锰酸锂正极材料的重要性,介绍了3d-过渡金属离子(Cr3+,Ni2+,Cu2+,Fe3+)掺杂在锰酸锂正极材料中的应用。研究了3d-过渡金属离子掺杂对锰酸锂正极材料结构和电化学性能的影响,并提出了其影响锂离子电池充放电和循环性能的机制。展望了3d-过渡金属离子掺杂在锂离子电池锰酸锂正极材料中的发展前景,并指出LiNi0.5Mn1.5O4是非常有应用前景的5V锂离子电池正极材料。

关键词：锂离子电池尖晶石正极材料 LiM0.5Mn1.5O4

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1,4-二氧六环预处理对锂电极的钝化作用

稀有金属材料与工程 2006年第4期35卷 585-588页

作者：丁飞张翠芬胡信国哈尔滨工业大学黑龙江哈尔滨150001

利用1,4-二氧六环对锂金属电极表面进行预处理,使之钝化,以提高电极的界面稳定性和充放电循环性能。结果表明:1,4-二氧六环可以在锂金属表面发生聚合,预先形成性能良好的SEI(Solid Electrolyte Interface)钝化膜,提高电解液中锂金属电... 详细信息

利用1,4-二氧六环对锂金属电极表面进行预处理,使之钝化,以提高电极的界面稳定性和充放电循环性能。结果表明:1,4-二氧六环可以在锂金属表面发生聚合,预先形成性能良好的SEI(Solid Electrolyte Interface)钝化膜,提高电解液中锂金属电极的界面稳定性,同时表面预处理并不会降低锂电极的动力学性能。锂电极的充放电循环效率测试和锂金属电池的循环性能测试表明:经过1,4-二氧六环表面预处理的锂金属电极与未经预处理的锂金属电极相比,无论是电极的充放电效率,还是由其所组成电池的放电性能与循环寿命都得到了较大提高。

关键词：锂电池表面预处理钝化层 1,4-二氧六环