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Selective Oxidation of CO in Excess H_2 over Ru/Al_2O_3 Catalysts Modified with Metal Oxide

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Journal of Natural Gas Chemistry 2007年第4期16卷 409-414页

作者： Xirong Chen hanbo zou Shengzhou Chen Xinfa Dong Weiming Lin School of Chemical and Energy Engineering South China University of Technology Guangzhou 510651 Guangdong China School of Chemistry and Chemical Engineering Guangzhou University Guangzhou 510006 Guangdong China

The Ru/Al2O3 catalysts modified with metal oxide （K20 and La2O3） were prepared v/a incipient wetness impregnation method from ***2O mixed with nitrate loading on Al2O3 support. The activity of catalysts was evaluated under simulative conditions for the preferential oxidation of CO （CO-PROX） from the hydrogen-rich gas streams produced by reforming gas, and the performances of catalysts were investigated by XRD and TPR. The results showed that the activity temperature of the modified catalysts Ru-K20/Al2O3 and Ru-La2O3/Al2O3 were lowered approximately 30℃ compared with pure Ru/Al2O3, and the activity temperature range was widened. The conversion of CO on Ru-K20/Al2O3 and Ru-La2O3/Al2O3 was above 99% at 140-160℃, suitable to remove CO in a hydrogen-rich gas and the selectivity of Ru-La2O3/Al2O3 was higher than that of Ru-K2O/Al2O3in the active temperature range. Slight methanation reaction was detected at 220℃ and above.

关键词： hydrogen-rich gas ruthenium based catalysts CO removal selective oxidation metal oxide

Enhanced electrochemical performance of garnet-based solid-state lithium metal battery with modified anodic and cathodic interfaces

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Chinese Journal of Chemical Engineering 2022年第4期35卷 140-147页

作者： Deen Yan Huangwang Mai Wen Chen Wei Yang hanbo zou Shengzhou Chen School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China Guangzhou Tinci Materials Technology Co. Ltd.Guangzhou 510760China

Due to high ionic conductivity and wide electrochemical window,the garnet solid electrolyte is considered as the most promising candidate electrolyte for solid-state lithium metal ***,the high contact impedance between metallic lithium and the garnet solid electrolyte surface seriously hampers its further *** this work,a Li-(ZnO)_(x)anode is prepared by the reaction of zinc oxide with metallic lithium and in situ coated on the surface of Li_(6.8)La_(3)Zr_(1.8)Ta_(0.2)O_(12)(LLZTO).The anode can be perfectly bound to the surface of LLZTO solid electrolyte,and the anode/electrolyte interfacial resistance was reduced from 2319 to 33.75Ω·cm^(2).The Li-(ZnO)_(0.15)|LLZTO|Li-(ZnO)_(0.15) symmetric battery exhibits a stable Li striping/plating process during charge-discharging at a constant current density of0.1 m A·cm;for 100 h at room ***,a Li-(ZnO)_(0.15)|LLZTO-SPE|LFP full battery,comprised of a polyethylene oxide-based solid polymer electrolyte(SPE)film as an interlayer between LiFePO4(LFP)cathode and LLZTO solid electrolyte,presents an excellent performance at 60℃.The discharge capacity of the full battery reaches 140 mA·h·g^(-1)at 0.1 C and the capacity attenuation is less than3%after 50 cycles.

关键词： Lithium metal battery Solid-state electrolyte Li-ZnO anode

Controllable Morphology Tailoring with Solvothermal Method Toward LiMnPO_(4)/C Cathode Materials for Improved Performance and Favorable Thermostability

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Acta Metallurgica Sinica(English Letters) 2022年第5期35卷 790-800页

作者： Wei Yang Xiulian Qiu Chengyun Wang Jinhao Ye Jihua Zhu hanbo zou Shengzhou Chen School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou510006China GAC Automotive Research and Development Center Guangzhou511434China Sunwoda Electronics Co. LtdShenzhen518107China

An environmentally friendly method for the synthesis of LiMnPO_(4)/C anode material for lithium-ion batteries by solvothermal method is *** modification of the morphology of this precursor is altered by changing the ratio of the conditioning solvent(water-ethylene glycol solution)and the order of material *** glycol(EG)exerts a considerable influence on synthesizing LiMnPO_(4)/C flake-like nanocrystal,which benefits the extraction/insertion reaction of lithium ions and improves the electrochemical activity and electrochemical performance of LiMnPO_(4)/C *** the solvent composition is H_(2)O:EG=1:3,exhibiting exceptional charge/discharge performance and rate capability,the specific discharge capacities are 155.8,153.7,148.8,141.4,129.5,and 112.6 mAh g^(−1) at the 0.1,0.2,0.5,1,2,and 5 C rates,*** the charge-discharge rate returns to 0.1 C,the LiMnPO_(4)/C material shows a reversible discharge specific capacity of 153.7 mAh g^(−1).Differential scanning calorimetry(DSC)tests verify that the thermodynamic stability of the prepared LiMnPO_(4)/C(LMP)and commercial LiFePO_(4)(LFP)materials is better than that of commercial nickel-cobalt-aluminum(NCA)ternary *** prepared LiMnPO_(4)/C composites have high electrochemical capacity and cycle stability.

关键词： LiMnPO_(4)/C solvothermal method Ethylene glycol Lithium-ion diffusion Thermostability

Synthesis of Hollow Three-Dimensional Channels LiNi_(0.5)Mn_(1.5)O_4 Microsphere by PEO Soft Template Assisted with Solvothermal Method

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Acta Metallurgica Sinica(English Letters) 2021年第8期34卷 1153-1162页

作者： Jinfeng Zeng Zhiting Liu hanbo zou Wei Yang Haosen Fan Haijun Yu Shengzhou Chen School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China Guangdong Brunp Recycling Technology Co. LtdGuangzhou 510006China Guangzhou Key Laboratory for New Energy and Green Catalysis Guangzhou UniversityGuangzhou 510006China

A appropriate size with three-dimension(3 D) channels for lithium diffusion plays an important role in constructing highperforming LiNi_(0.5)Mn_(1.5)O_4(LNMO) cathode materials, as it can not only reduce the transport path of lithium ions and electrons, but also reduce the side effects and withstand the structural strain in the process of repetitive Li~+ intercalation/deintercalation. In this work, an e fficient method for designing the hollow LNMO microsphere with 3 D channels structure by using polyethylene oxide(PEO) as soft template agent assisted solvothermal method is proposed. Experimental results indicate that PEO can make the reagents mingle evenly and nucleate slowly in the solvothermal process, thus obtaining a homogeneous distribution of carbonate precursors. In the final LNMO products, the hollow 3 D channels structure obtained by the decomposition of PEO and carbonate precursor in the calcination can provide abundant electroactive zones and electron/ion transport paths during the charge/discharge process, which benefits to improve the cycling performance and rate capability. The LNMO prepared by adding 1 g PEO possesses the most outstanding electrochemical performance, which presented an excellent discharge capacity of 143.1 mAh g~(-1) at 0.1 C and with a capacity retention of 92.2% after 100 cycles at 1 C. The superior performance attributed to the 3 D channels structure of hollow microspheres, which provide uninterrupted conductive systems and therefore achieve the stable transfer for electron/ion.

关键词： Polyethylene oxide(PEO) Soft template Solvothermal method Hollow LiNi_(0.5)Mn_(1.5)O_4(LNMO)microsphere Three-dimensional channels

Effect of Different Calcination Temperatures on the Structure and Properties of Zirconium-Based Coating Layer Modified Cathode Material Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_(2)

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Acta Metallurgica Sinica(English Letters) 2022年第6期35卷 985-995页

作者： Zijun Liao Jiankai Kang Qi Luo Caifeng Pan Jiangdong Chen Xiaolong Mo hanbo zou Wei Yang Shengzhou Chen School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China Institute of Energy and Catalysis Guangzhou UniversityGuangzhou 510006China Key Laboratory of Fuel Cell Technology of Guangdong Province Guangzhou 510006China

Lithium-rich manganese-based oxides have the advantages of high discharge specific capacity, so they are potential candidates for advanced lithium battery cathode materials. However, they also have drawbacks to be solved such as serious irreversible loss of capacity and voltage decay in the cycling process. Surface coating method was used in this paper to modify the lithium-rich manganese-based oxide(LRMO,Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_(2)) to improve its electrochemical properties. Zirconium-based compounds coated LRMO materials(ZBC@LRMO) were obtained via the reaction of lithium hydroxide with zirconium n-butanol and subsequent thermal treatment at different temperatures. The results of X-ray diffraction and transmission electron microscopy confirm that the crystal structure and composition of the ZBC coating layer vary with the calcination temperature. The coating layer obtained at 600 ℃ is composed of tetragonal ZrO_(2) and Li_(2)ZrO_(3). The ZBC@LRMO sample with tetragonal ZrO =2 and Li_(2)ZrO_(3) composite exhibits the best electrochemical performance: the discharge capacity of ZBC@LRMO can reach 296 mAh g^(-1) at 0.1 C and 120 mAh g^(-1) at high rate of 5 C.

关键词： Lithium-ion battery Cathode material Zirconium-based compounds coating Calcination temperature Electrochemical performance

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铂金催化剂上CO选择性氧化机理研究进展

化学反应工程与工艺 2007年第5期23卷 462-469页

作者：邹汉波陈胜洲林维明广州大学能源与催化技术研究所广东广州510006

简要介绍了金、铂催化剂上CO的选择性氧化反应,详细论述了该反应动力学及反应机理的确立,指出载体、氧的活化位、氢气及不同促进剂的影响等是今后研究的方向。

关键词：富氢气体 CO选择性氧化金催化剂铂催化剂动力学反应机理

Cu-Zr-Ce-O复合氧化物催化剂上CO选择性氧化性能

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化工学报 2005年第12期56卷 2320-2325页

作者：邹汉波董新法林维明华南理工大学化工与能源学院广东广州510640

将共沉淀法制备的CuZrCeO复合氧化物催化剂应用于富氢气体中CO的选择性氧化反应,研究了ZrO2掺杂量及预处理方法对催化剂性能的影响,并通过H2TPR、COTPR等手段对催化剂进行了表征.结果表明,掺杂ZrO2的Cu1Zr1Ce9Oδ催化剂在160～200℃之... 详细信息

将共沉淀法制备的CuZrCeO复合氧化物催化剂应用于富氢气体中CO的选择性氧化反应,研究了ZrO2掺杂量及预处理方法对催化剂性能的影响,并通过H2TPR、COTPR等手段对催化剂进行了表征.结果表明,掺杂ZrO2的Cu1Zr1Ce9Oδ催化剂在160～200℃之间具有99%以上的CO转化率和相对较高的选择性.掺杂适量的ZrO2能够提高催化剂的热稳定性和储氧能力,促进催化剂表面吸附氧向晶格氧的转化.经氧气预处理的Cu1Zr1Ce9Oδ催化剂活性最高.催化剂上Cu+/Cu2+氧化还原离子对和表面的晶格氧含量均影响催化剂的活性,但在富氢气氛下,表面的晶格氧对催化剂的性能影响较大.

关键词： Cu-Zr-Ce-O复合氧化物 CO选择性氧化预处理 ZrO2

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纳米级TiO_2中空球的制备

功能材料 2016年第5期47卷 190-194页

作者：邹汉波卢恒陈胜洲广州大学化学化工学院广州510006

以聚苯乙烯（PS）乳液为模板,首先合成了PS/TiO2复合微球,采用回流溶解出PS模板的方法,制备出纳米级TiO2中空球。探讨了不同单体浓度、引发剂用量、乳化剂用量以及反应温度对聚苯乙烯乳液的影响。利用XRD、TG、BET、IR和UV-Vis手段对合... 详细信息

以聚苯乙烯（PS）乳液为模板,首先合成了PS/TiO2复合微球,采用回流溶解出PS模板的方法,制备出纳米级TiO2中空球。探讨了不同单体浓度、引发剂用量、乳化剂用量以及反应温度对聚苯乙烯乳液的影响。利用XRD、TG、BET、IR和UV-Vis手段对合成的纳米颗粒进行了表征。研究发现80℃下,单体浓度占总质量的20%、引发剂和乳化剂分别为单体质量的0.3%和3%、回流时间为12h时,可以得到外径为180nm、比表面积为283.4m2/g的TiO2中空球,且中空球的壳层由大量粒径为8~10nm的TiO2颗粒紧密堆积而成。

关键词： PS乳液复合微球模板法 TiO2中空球

Co-Mn比例调控对LiNi_(0.8)Co_(0.10-y)Mn_(0.05+y)Al_(0.05)O_(2)材料性能影响探究

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化工学报 2022年第12期73卷 5615-5624页

作者：杨伟王昱杰方凯斌邹汉波陈胜洲刘自力广州大学化学化工学院广东广州510006

采用共沉淀法,以草酸为沉淀剂,过渡金属锰作为钴的替代元素,制备了系列不同钴锰比例的镍钴锰铝锂(LiNi_(0.8)Co_(0.10-y)Mn_(0.05+y)Al_(0.05)O_(2),y=0.01,0.02,0.03,0.04)四元材料,研究锰对钴的逐步取代对镍钴锰铝锂四元材料的性能产... 详细信息

采用共沉淀法,以草酸为沉淀剂,过渡金属锰作为钴的替代元素,制备了系列不同钴锰比例的镍钴锰铝锂(LiNi_(0.8)Co_(0.10-y)Mn_(0.05+y)Al_(0.05)O_(2),y=0.01,0.02,0.03,0.04)四元材料,研究锰对钴的逐步取代对镍钴锰铝锂四元材料的性能产生的影响。实验结果表明,当y=0.02时的LiNi_(0.8)Co_(0.08)Mn_(0.07)Al_(0.05)O_(2)材料具有最好的形貌、结构发育程度以及电化学性能。钴锰共掺杂对合成的LiNi_(0.8)Co_(0.10-y)Mn_(0.05+y)Al_(0.05)O_(2)材料产生了协同作用,且锰掺杂比例低于钴时可以提升材料电化学容量,当锰掺杂比例超过钴时容量开始下降,说明掺杂比例过多的锰对合成的高镍四元材料的电化学性能提升没有助益。

关键词：电化学锂离子电池高镍四元材料合成纳米材料