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Boosting hydrocarbon conversion via Cu-doping induced oxygen vacancies on CeO2 in CO2 electroreduction

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Journal of energy chemistry 2025年第1期100卷 66-76页

作者： Lei Xue Tong Shi Chenhui Han Heng Zhang Fenrong Liu Haorun Li Yan Wang Xiaojun Gu Shanghong Zeng Inner Mongolia Key Laboratory of chemistry and Physics of Rare Earth materials School of Chemistry and Chemical Engineering Inner Mongolia University State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences institute of Catalysis Department of Chemistry Zhejiang University National Key Laboratory of Baiyunobo Rare Earth Resource Research and Comprehensive Utilization Baotou Research Institute of Rare Earths

Conversion of CO2back to hydrocarbons is the most direct way of closing the“carbon cycle”,and its significance is further enlarged if this process is driven by renewable energies such as ***,precisely controlling the product selectivity towards hydrocarbons against the competitive hydrogen evolution remains challenging,especially for Cu-based ***,we report a novel defect engineering strategy,by which Cu-doping-induced oxygen vacancies on CeO2nanorods were effectively created,with adjustable vacancy/Cu *** resulting optimum catalyst shows up to 79% catalytic current density to hydrocarbons （excluding CO）,with 49% faradaic efficiency to *** and density functional theory unveil that the ratio between oxygen vacancy and Cu affects significantly the formation of*CHO and activation of H2O,which leads to the following deep hydrogenation to *** findings may spur new insights for designing and developing more controllable chemical process relevant to CO2utilization.

关键词： Oxygen vacancy Hydrocarbon production Reaction mechanism

揭示钙钛矿前驱体溶液的胶体组成及其对成膜的影响（英文）

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Science China materials 2025年第1期 156-164页

作者：娄甜甜陈乐添杨桂春陈鹏赵文燕李红时李国然 School of materials Science and Engineering Institute of New Energy Material Chemistry Renewable Energy Conversion and Storage Center Nankai University School of Mechanical and Electronic Engineering Jingdezhen Ceramic University

胶体是钙钛矿前驱体溶液的重要组成部分,对钙钛矿的成膜质量有重大影响.在这项工作中,我们探索了两种不同类型前驱体的胶体成分:原料单体混合溶解(MMD)和预合成的钙钛矿单晶再溶解(SCR).我们发现了一种新的溶解化学平衡机制,即从混合单...

胶体是钙钛矿前驱体溶液的重要组成部分,对钙钛矿的成膜质量有重大影响.在这项工作中,我们探索了两种不同类型前驱体的胶体成分:原料单体混合溶解(MMD)和预合成的钙钛矿单晶再溶解(SCR).我们发现了一种新的溶解化学平衡机制,即从混合单体到3C立方相(α相)的转变涉及一个可逆的转变过程. MMD的方法产生了多聚Pb-I溶剂化胶束,而SCR方法产生的则是六方卤化铅基的钙钛矿胶体,这种胶体组成的差别显著影响了成膜质量.值得注意的是,六方相胶体是有利的成核位点,可促进形成晶粒更大、相更均匀、缺陷更少的α相钙钛矿薄膜.这项工作证明了调控胶体成分的重要性,并从理论上深入探讨了以粉末、微晶和单晶等形式重新溶解钙钛矿的有利影响.

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High Temperature Performances of Spherical Nickel Hydroxide with Additive Y_2O_3

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Journal of Rare Earths 2004年第3期22卷 422-426页

作者：米欣叶茂阎杰魏进平高学平 institute of new energy material chemistry Nankai University Tianjin 300071 China

The effect Of Y2O3 as additive to the positive electrode on the high-temperature performances of the Ni-MH batteries was studied. The specific capacities of the positive electrode in Ni-MH battery at higher temperatures are much lower than usual. In order to improve high-temperature performances, charge/discharge curves of the Ni(OH)(2) electrodes with different amounts Of Y2O3 it different temperatures were studied. It is found that the specific capacities of the spherical Ni (OH)(2) with Y2O3 as additive are much higher than those of the regular at higher temperatures. The specific capacity of Ni (OH)(2) containing 1% Y2O3 at 0.2C C/D rate is 35% higher than that of the regular. The specific capacity of Ni (OH)(2) containing 0.2% Y2O3 at 1C C/D rate is 15% higher than that of the regular. Mechanism Of Y2O3 improving high temperature performances of Ni(OH)(2) electrode was also discussed in detail.

关键词： energy materials Y2O3 spherical Ni(OH)(2) high temperature performance discharge capacity rare earths

Structure and electrochemical performance of hydrogen storage alloy La_(0.7)Mg_(0.3)Ni_(2.875)Co_(0.525)Mn_(0.1)-boron composite

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Rare Metals 2006年第z1期25卷 261-265页

作者： LIU Yi WANG Yijing XIAO Lingling CAO Jiansheng JIAO Lifang FENG Yan YUAN Huatang institute of new energy material chemistry Nankai UniversityTianjin 300071China

The structure and electrochemical characteristics of La_(0.7)Mg_(0.3)Ni_(2.875)Co_(0.525)Mn_(0.1)-boron composite was studied *** AB_(3) type hydrogen storage alloys La_(0.7)Mg_(0.3)Ni_(2.875)Co_(0.525)Mn_(0.1) were successfully synthesized by means of inter-media alloy La_(2)Mg_(17).The alloys were composited with boron at different weight *** the XRD analyses,each alloy of this series is mainly composed of(La,Mg)Ni_(3) phase and the LaNi_(5) phase,and the phase abundance of each phase varies with the boron weight rate,moreover,after composition,the c and cell volumes of(La,Mg)Ni_(3) phase increase,and the LaNi_(5) phase keep the same,which indicate that the boron may enter(La,Mg)Ni_(3) *** electrochemical studies show that the maximum discharge capacity of the composites decreases,but the cycling life *** the high rate discharge ability and exchange impendence spectroscopy(EIS)of the AB_(3) alloys and its composite were also studied.

关键词： AB_(3)type hydrogen storage alloys composite materials structure characteristics electrochemical performance

Study on Degradation and Recovery of AB_5-Type Hydrogen Storage Alloy Used in Ni-MH Batteries

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Journal of Rare Earths 2002年第3期20卷 213-217页

作者：王荣阎杰周震周作祥邓斌高学平 institute of new energy material chemistry Nankai University Tianjin 300071 China

The influences of deeply overdischarge on the negative electrode alloy of Ni/MH battery were studied. After overdischarge, La(OH) 3 and Al(OH) 3 are found to form in the negative electrode through XRD analysis. The hydrogen storage alloy powder from spent Ni/MH batteries was recovered by chemical and melting method according to degradation mechanism. The structure of recovered alloy was measured by XRD. The experimental results demonstrate that the alloy structure is CaCu 5 type. The constant current charge/discharge test was carried out to the original alloy and the recovered alloy. It is found that their discharge capacities are almost the same, but the discharge potential of the recovered alloy is higher than that of the original alloy. The results of cyclic lifetime test demonstrate that the capacity degradation of the recovered alloy is slower than that of the original one.

关键词： rare earths Ni/MH battery overdischarge hydrogen storage alloy recovery

Effect of Lu_2O_3 on Charge/discharge Performances of Spherical Nickel Hydroxide at High Temperature

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Journal of Rare Earths 2005年第6期23卷 732-736页

作者：任俊霞王小建李宇展高学平阎杰 institute of new energy material chemistry Nankai University Tianjin 300071 China institute

Nickel-metal hydride （Ni/MH） batteries are one of promising batteries for electric vehicle applications, but at high temperature the charge efficiency of nickel electrode is very low. In order to improve the high-temperature-efficiency of nickel electrode, spherical nickel hydroxide mixed with various ratios of Lu2O3 was used as active material of pasted nickel electrodes. The results of charge/discharge experiments, cyclic voltammetric measurements and XRD characterizations have shown that after addition of Lu2O3, the oxygen evolution overpotcntial is elevated much, the charge efficiency of nickel electrode at high temperature is greatly improved and the content of β-NiOOH phase increases in charged electrodes. In addition, the mixed ratio of Lu2O3 has different effects on high temperature performances of nickel electrode at different charge/discharge currents, 3.5 % is the optimum mixed ratio, and the action of Lu2O3 on high temperature electrochemical behaviors is more apparent when nickel electrodes are charged at small current than large current.

关键词： spherical nickel hydroxide high temperature performances Lu2O3 oxygen evolution overpotential rare earths

A molecular dynamics simulation of the structure of ionic liquid (BMIM^+/PF_6^-)/rutile (110) interface

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Science China chemistry 2009年第9期52卷 1434-1437页

作者： WANG Shu1, CAO Zhen1, LI Shu1 & YAN TianYing1,2 1 institute of new energy material chemistry and department of material chemistry, Nankai University, Tianjin 300071, China 2 institute of Scientific Computing, Nankai University, Tianjin 300071, China institute of new energy material chemistry and department of material chemistry Nankai University Tianjin 300071 China institute of Scientific Computing Nankai University Tianjin 300071 China

The interfacial structure between the room-temperature ionic liquid, 1-butyl-3-methyl-imidazolium hexafluorophosphate (BMIM+/PF6-) and rutile (110) surface is simulated by classical molecular dynam-ics simulation, aiming to model a crucial constituent of the electrolyte/semiconductor interface. The simulation results show several enhanced layers forming in the interfacial region, especially for the anions. A well ordered double layering structure of the ions is also observed in the interfacial region. The cations are found to organize themselves in a parallel alignment with respect to the TiO2 slab, with an obvious elongation of the side chains.

关键词： molecular dynamics simulation ionic liquid rutile (110) interface

Synthesis of LiCo_xNi_(1-x)O_2 cathode materials from electrolysis Co-Ni alloys

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中国有色金属学会会刊：英文版 2005年第4期15卷 784-788页

作者：叶茂魏进平曹晓燕翟金玲王晓宇孙欣阎杰 institute of new energy material chemistry Nankai University College of chemistry and Chemical Engineering Ocean University of China

The LiCoxNi1-xO2 （x=0.2, 0.5 and 0.8） cathode materials were synthesized by sintering the mixtures of lithium salt and CoxNi1-x（OH）2 （x=0.2, 0.5 and 0.8） which were achieved from corresponding CoxNi1-x alloys by electrolysis technique. The structure and electrochemical characteristics of the obtained LiCoxNi1-xO2 were studied by XRD, SEM, PSCA and charge-discharge cycling test. The results show that the electrochemical capacities of the LiCoxNi1-xO2 （x=0.2, 0.5 and 0.8） materials are improved with the increase of the Ni content. The electrochemical performance of LiCo0.2Ni0.8O2 made in oxygen atmosphere has higher charge-discharge capacity and better cycleability compared with the one made in air atmosphere.

关键词： LiCoxNi1-xO2 阴极合成工艺电解工艺蓄电池合金

Facile carbonaceous microsphere templated synthesis of Co3O4 hollow spheres and their electrochemical performance in supercapacitors

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Nano Research 2013年第2期6卷 87-98页

作者： Hongmei Du Lifang Jiao Qinghong Wang Jiaqin Yang Lijing Guo Yuchang Si Yijing Wang Huatang Yuan institute of new energy material chemistry Key Laboratory of Advanced Energy Materials Chemistry (MOE) Tianjin Key Lab of Metal and Molecule-based Material Chemistry Nankai University Tianjin 300071 China

Co3O4 hollow spheres assembled from nanoparticles have been successfully synthesized by a one-pot hydrothermal carbonization and calcination method. In this method, carbon spheres obtained through hydrothermal carbonization at a low temperature of 140 ℃ are used as sacrificial templates. The carbonization process was monitored by Fourier transform infrared spectroscopy （FT-IR） and Raman spectroscopy. Both the carbon sphere soft templates and the NH3 released from hexamethylenetetramine play key roles in the formation of these novel hollow structures. The formation of the Co3O4 hollow spheres using hydrothermal carbon spheres as templates can be attributed to the synergetic effect of metal ion adsorption and heterogeneous nucleation of Co（OH）2, which is different from the traditional adsorption theory. The as-obtained Co3O4 hollow microspheres exhibit excellent cycling performance and good rate capacity when used as electrode materials in supercapacitors, which can be attributed to the small particle size of Co3O4 and the sufficient space available to interact with the electrolytes. This facile strategy may be extended to synthesize other metal oxide hollow spheres, which may find application in sensors and catalysts due to their unique structural features.

关键词： hydrothermal carbonization calcination hollow spheres adsorption supercapacitors