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| 1 | Improving the performance of solid oxide electrolysis cell with gold nanoparticles-modified LSM-YSZ anode显示文摘Gold, as the common current collector in solid oxide electrolysis cell(SOEC), is traditionally considered to be inert for oxygen evolution reaction at the anode of SOEC. Herein, gold nanoparticles were loaded onto conventional strontium doped lanthanum manganite-yttria stabilized zirconia(LSM-YSZ) anode, which evidently improved the performance of oxygen evolution reaction at 800 °C. The current densities at 1.2 V and 1.4 V increased by 60.0% and 46.9%, respectively, after loading gold nanoparticles onto the LSM-YSZ anode. Physicochemical characterizations and electrochemical measurements suggested that the improved SOEC performance was attributed to the accelerated electron transfer of elementary process in anodic polarization reaction and the newly generated triple phase boundaries in gold nanoparticles-loaded LSMYSZ anode. | Yuefeng Song Xiaomin Zhang Yingjie Zhou Houfu Lv Qingxue Liu Weicheng Feng Guoxiong Wang Xinhe Bao | 2019 | Journal of Energy Chemistry2019，28，8： | 4 |
| 2 | Infiltration of Ce0.8Gd0.2O1.9 nanoparticles on Sr2Fe1.5Mo0.5O6-δ cathode for CO2 electroreduction in solid oxide electrolysis cell显示文摘Solid oxide electrolysis cell(SOEC) can electrochemically convert CO2 to CO at the gas-solid interface with a high current density and Faradaic efficiency, which has attracted increasing attentions in recent years.Exploring efficient catalyst for electrochemical CO2 reduction reaction(CO2 RR) at the cathode is a grand challenge for the research and development of SOEC. Sr2Fe1.5Mo0.5O6-δ(SFM) is one kind of promising cathode materials for SOEC, but suffers from insufficient activity for CO2 RR. Herein, Gd0.2Ce0.8O1.9(GDC)nanoparticles were infiltrated onto the SFM surface to construct a composite GDC-SFM cathode and improve the CO2 RR performance in SOEC. The current density over the GDC infiltrated SFM cathode with a GDC loading of 12.8 wt% reaches 0.446 A cm-2 at 1.6 V and 800 °C, which is much higher than that over the SFM cathode(0.283 A cm-2). Temperature-programmed desorption of CO2 measurements suggest that the infiltration of GDC nanoparticles significantly increases the density of surface active sites and three phase boundaries(TPBs), which are beneficial for CO2 adsorption and subsequent conversion. Electrochemical impedance spectroscopy results indicate that the polarization resistance of 12.8 wt% GDCSFM cathode was obviously decreased from 0.46 to 0.30 cm^2 after the infiltration of GDC nanoparticles. | Houfu Lv Yingjie Zhou Xiaomin Zhang Yuefeng Song Qingxue Liu Guoxiong Wang Xinhe Bao | 2019 | Journal of Energy Chemistry2019，28，8： | 3 |
| 3 | In situ electrochemical reconstruction of Sr_(2)Fe_(1.45)Ir_(0.05)Mo_(0.5)O_(6-δ)perovskite cathode for CO_(2)electrolysis in solid oxide electrolysis cells显示文摘Solid oxide electrolysis cells provide a practical solution for the direct conversion of CO_(2)to other chemicals(i.e.CO),however,an in-depth mechanistic understanding of the dynamic reconstruction of active sites for perovskite cathodes during CO_(2)electrolysis remains a great challenge.Herein,we identify that iridium-doped Sr_(2)Fe_(1.45)Ir_(0.05)Mo_(0.5)O_(6-δ)(SFIrM)perovskite displays a dynamic electrochemical reconstruction feature during CO_(2)electrolysis with abundant exsolution of highly dispersed IrFe alloy nanoparticles on the SFIrM surface.The in situ reconstructed IrFe@SFIrM interfaces deliver a current density of 1.46 A cm^(−2)while maintaining over 99%CO Faradaic efficiency,representing a 25.8%improvement compared with the Sr_(2)Fe_(1.5)Mo_(0.5)O_(6-δ)counterpart.In situ electrochemical spectroscopy measurements and density functional theory calculations suggest that the improved CO_(2)electrolysis activity originates from the facilitated formation of carbonate intermediates at the IrFe@SFIrM interfaces.Our work may open the possibility of using an in situ electrochemical poling method for CO_(2)electrolysis in practice. | Yuxiang Shen Tianfu Liu Rongtan Li Houfu Lv Na Ta Xiaomin Zhang Yuefeng Song Qingxue Liu Weicheng Feng Guoxiong Wang Xinhe Bao | 2023 | National Science Review2023，10，9： | 0 |
| 4 | In-situ exsolution of cobalt nanoparticles from La_(0.5)Sr_(0.5)Fe_(0.8)Co_(0.2)O_(3-δ) cathode for enhanced CO_(2) electrolysis performance显示文摘Solid oxide electrolysis cell(SOEC)is a promising technology for CO_(2) conversion and renewable energy storage with high efficiency.It is highly desirable to develop catalytically active cathodes for CO_(2) electrolysis.Herein,cathode materials with different structural stabilities are designed by Nb substitution on La_(0.5)Sr_(0.5)Fe_(0.8)Co_(0.2)O_(3-δ)(LSFC82)to obtain La_(0.5)Sr_(0.5)Fe_(0.7)Co_(0.2)Nb_(0.1)O_(3-δ)(LSFCN721)and La_(0.5)Sr_(0.5)Fe_(0.8)Co_(0.1)Nb_(0.1)O_(3-δ)(LSFCN811),respectively.LSFC82-Sm_(0.2)Ce_(0.8)O_(2-δ)(SDC)cathode with inferior structural stability(ability to maintain the structure)shows desirable CO_(2) electrolysis performance with the generated current density of 1.80 A cm^(-2)2 at 1.6 V and stable performance during 110 h operation at 1.2 V and 800℃.However,LSFC82 particles are collapsed into pieces after stability test with the generation of Co nanoparticles simultaneously.The frameworks of LSFCN721 and LSFCN811 particles maintain well because of the high-valent niobium,but Co exsolution,ox-ygen vacancy content and the corresponding CO_(2) electrolysis performance are restricted.This work confirms that Co nanoparticles can be exsolved from LSFC82-SDC cathode during CO_(2) electrolysis,providing references for constructing metallic nanoparticles decorated-perovskite cathodes for SOECs. | Jingwei Li Qingxue Liu Yuefeng Song Houfu Lv Weicheng Feng Yuxiang Shen Chengzhi Guan Xiaomin Zhang Guoxiong Wang | 2022 | Green Chemical Engineering2022，3，3： | 0 |
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