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Enhancing cathode performance for CO2 electrolysis with Ce0.9M0.1O2-δ（M=Fe, Co, Ni） catalysts in solid oxide electrolysis cell

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Journal of Energy Chemistry 2020年第1期29卷 46-51,I0003页

作者： Zhidong Huang Zhe Zhao Huiying Qi Xiuling Wang Baofeng Tu mojie cheng Division of Fuel Cells Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China

Electrochemical conversion with solid oxide electrolysis cells is a promising technology for CO2 utilization and simultaneously store renewable *** this work,Ce0.9M0.1O2-δ(CeM,M=Fe,Co,Ni)catalysts are infiltrated into La0.6Sr0.4Cr0.5Fe0.5O3-δ-Gd0.2Ce0.8O2-δ(LSCr Fe-GDC)cathode to enhance the electrochemical performance for CO2 ***-LSCrFe-GDC cell obtains the best performance with a current density of 0.652 A cm^-2,followed by CeFe-LSCrFe-GDC and CeNi-LSCrFe-GDC cells with the value of 0.603 and 0.535 A cm^-2,respectively,about 2.44,2.26 and 2.01 times higher than that of the LSCrFe-GDC cell at1.5 V and 800℃.Electrochemical impedance spectra combined with distributions of relaxed times analysis shows that both CO2 adsorption process and the dissociation of CO2 at triple phase boundaries are accelerated by Ce M catalysts,while the latter is the key rate-determining step.

关键词： Solid oxide electrolysis cell Carbon dioxide conversion Doped ceria Distribution of relaxation times Electroreduction

Separation of butane isomer by tubular silicalite-1 zeolite membrane

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Chinese Science Bulletin 1998年第24期43卷 2074-2078页

作者： Xiaochun Xu mojie cheng Weishen Yang Liwu Lin Chinese Acad Sci Dalian Inst Chem Phys State Key Lab Catalysis Dalian 116023 Peoples R China

The permeation properties of n-butane, i-butane and n-butane/i-butane mixture （n-butane 24.3% （molar ratio）, i-butane 75.7%） through a tubular silicalite1 zeolite membrane were studied at 298 and 473 K respectively. The permselectivities of n-butane and i-butane under pressure difference of 0.06 MPa at 298 and 473 K were 16.3 and 7.4 respectively. The separation factors of n-butane/i-butane mixture were between 2.0 and 2.5 at 298 and 473 K. At 298 K, the permeances of n-butane in the mixture were lower than those of single component while the permeances of i-butane in the mixture were almost the same as those of single component. At 473 K, the permeances of n-butane and i-butane in the mxiture were decreased compared with those of the single component, and the permeance of n-butane decreased more rapidly than that of i-butane.

关键词： silicalite1 zeolite membrane butane isomer separation.

Adsorption of Xe in zeolite MCM-22

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Chinese Science Bulletin 2002年第7期47卷 542-547页

作者： Chen Fang Deng Feng cheng mojie Yue Yong Ye Chaohui State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsChinese Academy of Sciences430071WuhanChina State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of Sciences116023DalianChina

Adsorption of xenon in zeolite MCM-22, a zeolite containing two separate pore systems, has been investigated in detail by variable temperature (VT) 129Xe NMR spectroscopy. NMR results suggest that Xe atoms are preferentially adsorbed in the supercages of the zeolite at low Xe pressure (less than a few atmosphere), while Xe atoms can penetrate into the two-dimensional sinusoidal channels at high Xe pressure. Exchange of xenon at the different adsorption sites in the same supercage, i.e. xenon atoms in the two pockets and those in the central part of the supercage, was confirmed at 145 K by two-dimensional (2D) 129Xe NMR exchange spectroscopy. The time scale for the exchange is about several milliseconds.

关键词： MCM-22 zeolite adsorption 129Xe NMR.

LSM-YSZ nano-composite cathode with YSZ interlayer for solid oxide fuel cells

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Journal of Energy Chemistry 2017年第3期26卷 510-514页

作者： Zhongbo Liu Zhe Zhao Lei Shang Dingrong Ou Daan Cui Baofeng Tu mojie cheng Division of Fuel Cells Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of Sciences University of Chinese Academy of Sciences

Low temperature prepared(La;Sr;);MnO;-δ-Y;Zr;O;（LSM-YSZ） nano-composite cathode has high three-phase boundary（TPB） density and shows higher oxygen reduction reaction（ORR） activity than traditional LSM-YSZ cathode at reduced temperatures. But the weak connection between cathode and electrolyte due to low sintering temperature restrains the performance of LSM-YSZ nano-composite cathode. A YSZ interlayer, consisted of nanoparticles smaller than 10 nm, is introduced by spinning coating hydrolyzed YSZ sol solution on electrolyte and sintering at 800 °C. The thickness of the interlayer is about 150 nm. The YSZ interlayer intimately adheres to the electrolyte and shows obvious agglomeration with LSM-YSZ nano-composite cathode. The power densities of the cell with interlayer are 0.83, 0.46 and 0.21 W/cm;under 0.7 V at 800, 700 and 600 °C, respectively, which are 36%, 48% and 50% improved than that of original cell. The interlayer introduction slightly increases the ohmic resistance but significantly decreases the polarization resistance. The depressed high frequency arcs of impedance spectra suggest that the oxygen incorporation kinetics are enhanced at the boundary of YSZ interlayer and LSM-YSZ nanocomposite cathode, contributing to improved electrochemical performance of the cell with interlayer.

关键词： Solid oxide fuel cell LSM-YSZ cathode Interlayer Three-phase boundary Oxygen incorporation

Co/Fe oxide and Ce_(0.8)Gd_(0.2)O_(2-δ) composite interlayer for solid oxide electrolysis cell

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Journal of Energy Chemistry 2016年第5期25卷 840-844页

作者： Jingbo Yan Lei Shang Zhe Zhao Dingrong Ou mojie cheng Division of Fuel Cells Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences

A composite interlayer comprised of gadolinia doped ceria（GDC） and Co/Fe oxide was prepared and investigated for solid oxide electrolysis cell with yttrium stabilized zirconia（YSZ） electrolyte and LaSrCoFeO（LSCF） anode. The interlayer was constructed of a base layer of GDC and a top layer of discrete CoO/FeCoOparticles. The presence of the GDC layer drastically alleviated the undesired reactions between LSCF and YSZ, and the presence of Co/Fe oxide led to further performance improvement. At 800 °C and 45% humidity, the cell with 70% Co/Fe-GDC interlayer achieved 0.98 A/cmat 1.18 V, 14% higher than the cell without Co/Fe oxide. Electrochemical impedance spectroscopy（EIS） revealed that with higher Co/Fe content, both the ohmic resistance and the polarization resistance of the cell were reduced. It is suggested that Co/Fe oxide can react with the Sr species segregated from LSCF and Sr（Co,Fe）O, a compound with high catalytic activity and electronic conductivity. The Sr-capturing ability of Co/Fe oxide in combination with the Sr-blocking ability of GDC layer can effectively suppress the undesired reaction between LSCF and YSZ, and consequently improve the cell performance.

关键词： Solid oxide electrolysis cell Ceria interlayer Cobalt oxide Sr segregation

IN SITU SYNTHESIS OF A-TYPE ZEOLITE MEMBRANE ON ALUMINA SUPPORT

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Chinese Journal of Catalysis 1997年第5期 8-9页

作者： Xu Xiaochun, Yang Weishen ** , cheng mojie, Liu Jie, Yang Yashu, Lin Liwu (Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023)

ＩＮＳＩＴＵＳＹＮＴＨＥＳＩＳＯＦＡＴＹＰＥＺＥＯＬＩＴＥＭＥＭＢＲＡＮＥＯＮＡＬＵＭＩＮＡＳＵＰＰＯＲＴＸｕＸｉａｏｃｈｕｎ，ＹａｎｇＷｅｉｓｈｅｎ，ＣｈｅｎｇＭｏｊｉｅ，ＬｉｕＪｉｅ，ＹａｎｇＹａｓｈｕ，... 详细信息

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关键词： Zeolite membrane A type zeolite In situ Synthesis Alumina support

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钐锶钴阴极/镧锶镓镁电解质界面的元素扩散

催化学报 2009年第9期30卷 919-925页

作者：洪博张云涂宝峰程谟杰中国科学院大连化学物理研究所辽宁大连116023 中国科学院研究生院北京100049

采用X射线衍射、扫描电镜及电化学方法考察了固体氧化物燃料电池钐锶钴(Sm0.5Sr0.5CoO3-δ,SSC)阴极烧结温度和时间对镧锶镓镁(La0.9Sr0.1Ga0.8Mg0.2O3-δ,LSGM)电解质的导电行为和电解质/阴极界面电化学性质的影响.结果表明,当SSC阴极... 详细信息

采用X射线衍射、扫描电镜及电化学方法考察了固体氧化物燃料电池钐锶钴(Sm0.5Sr0.5CoO3-δ,SSC)阴极烧结温度和时间对镧锶镓镁(La0.9Sr0.1Ga0.8Mg0.2O3-δ,LSGM)电解质的导电行为和电解质/阴极界面电化学性质的影响.结果表明,当SSC阴极的烧结温度由1173K升高到1323K时,LSGM/SSC界面形成了LaSrGaO4和LaSrGa3O7杂相;当烧结温度升高到1373K时,还形成了高电子电导率的La-Sr-Co-O复合化合物.Co元素的扩散导致LSGM电解质电子电导率升高,氧离子迁移数和电池开路电压降低.延长SSC阴极烧结时间,LSGM电解质的欧姆电阻增大,电解质氧离子迁移数和电池的开路电压降低,这是由于延长SSC烧结时间加剧了LSGM/SSC界面上高阻抗相LaSrGaO4和LaSrGa3O7的生成.阴极中大量Co元素的扩散改变了LSGM电解质内部组成与结构.

关键词：固体氧化物燃料电池镧锶镓镁钐锶钴电化学阻抗谱

PERMEATION　OF　PURE　GASES　ON　A　SILICALITE-1　TUBULAR　MEMBRANE

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Chinese Journal of Catalysis 1997年第1期 4-5页

作者： cheng mojie, Xu Xiaochun, Yang Weishen, Liu Jie, Yang Yashu, Xu Yide, Lin Liwu (State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023)

ＰＥＲＭＥＡＴＩＯＮＯＦＰＵＲＥＧＡＳＥＳＯＮＡＳＩＬＩＣＡＬＩＴＥ┐１ＴＵＢＵＬＡＲＭＥＭＢＲＡＮＥＣｈｅｎｇＭｏｊｉｅ，ＸｕＸｉａｏｃｈｕｎ，ＹａｎｇＷｅｉｓｈｅｎ，ＬｉｕＪｉｅ，ＹａｎｇＹａｓｈｕ，ＸｕＹｉｄｅ... 详细信息

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关键词： Silicalite 1 Alumina Composite tubular membrane Gas permeation

中温固体氧化物燃料电池NiO/YSZ阳极的还原过程

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催化学报 2008年第10期29卷 979-986页

作者：刘斌张云涂宝峰柳林董永来程谟杰中国科学院大连化学物理研究所辽宁大连116023 中国科学院研究生院北京100049

以氢气程序升温还原(H2-TPR)为手段,研究了中温固体氧化物燃料电池烧结NiO/YSZ阳极的还原过程,并通过对电池开路电位和阻抗的原位监测考察了电池中阳极的还原过程.H2-TPR结果表明,阳极烧结温度升高,阳极中的NiO变得难以还原,但当温度提... 详细信息

以氢气程序升温还原(H2-TPR)为手段,研究了中温固体氧化物燃料电池烧结NiO/YSZ阳极的还原过程,并通过对电池开路电位和阻抗的原位监测考察了电池中阳极的还原过程.H2-TPR结果表明,阳极烧结温度升高,阳极中的NiO变得难以还原,但当温度提高到1500℃时,NiO还原峰的峰温降低.阳极NiO含量越高,NiO越容易被还原.这是由于烧结过程中NiO颗粒长大和NiO/YSZ界面分离共同作用的结果.电池原位还原过程中开路电位的变化表明,具有高NiO含量的阳极还原较慢.这主要是由于高NiO含量的阳极具有较大的收缩率和大的NiO粒子,导致还原初期产生的大量H2O不能被及时排出,从而抑制了还原过程.电池还原过程中交流阻抗谱的变化表明,50%NiO/YSZ阳极具有最稳定的还原过程.30%和70%NiO/YSZ电池都有一个极化电阻逐渐增大的过程,前者的极化电阻在还原600min后逐渐稳定,而后者并不能稳定.

关键词：镍钇氧化锆还原交流阻抗谱程序升温还原固体氧化物燃料电池