Kinetics of CO2 electrolysis on composite electrodes consisting of Cu and samaria-doped ceria

Su Taolong; Li Yihang; Xue Shuangshuang; Xu Zheqiang; Zheng Minghao; Xia Changrong

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Kinetics of CO2 electrolysis on composite electrodes consisting of Cu and samaria-doped ceria

机译：Cu和撒玛型掺杂二氧化铈组成的复合电极的CO2电解动力学

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This work investigates the kinetics of CO2 electrolysis on Cu-SDC (samaria-doped ceria) composite electrodes supported on YSZ (yttria-stabilized zirconia) electrolytes. The Cu-SDC electrode was achieved by impregnating Cu into porous SDC with a copper nitrate solution. The electrochemical characteristics including polarization curves and AC impedance spectra were measured at different temperatures and applied biases, and in different atmospheres. The exchange current densities and charge transfer coefficients at various temperatures were obtained by applying nonlinear curve-fitting analysis to the current-overpotential curves. The polarization resistance derived from the I-V curve is consistent with that from the impedance spectrum, which indicates good reliability for fitting the Butler-Volmer equation to the I-V curve. The activation energy of CO2 electrolysis derived from the Arrhenius behavior of exchange current density is not affected by the atmosphere; however, it is decreased with the increase of impregnated Cu. The determined rate-limiting step is related to oxygen vacancies that play a vital role in CO2 electrolysis.

机译：该作品研究了在YSZ（yTTRIA稳定的氧化锆）电解质上负载的Cu-SDC（钐掺杂二氧化铈）复合电极的CO2电解动力学。 Cu-SDC电极通过用硝酸铜溶液浸渍到多孔SDC中来实现。在不同的温度和施加的偏差和不同的环境下测量包括偏振曲线和AC阻抗谱的电化学特性。通过将非线性曲线拟合分析施加到电流过电位曲线来获得各种温度的交换电流密度和电荷转移系数。来自I-V曲线的偏振电阻与来自阻抗谱的偏振抗性一致，这表示将管道 - Volmer方程拟合到I-V曲线的良好可靠性。来自交换电流密度的Arrhenius行为的CO2电解的激活能量不受大气的影响;然而，随着浸渍Cu的增加而降低。确定的率限制步骤与在CO2电解中发挥重要作用的氧空位有关。

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来源
《Journal of Materials Chemistry, A. Materials for energy and sustainability》 |2019年第4期|共9页
作者
Su Taolong; Li Yihang; Xue Shuangshuang; Xu Zheqiang; Zheng Minghao; Xia Changrong;
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作者单位

Univ Elect Sci &

Technol China Dept Mat Sci Zhongshan Inst 1 Coll Rd Zhongshan 528400 Guangdong Peoples R China;

Univ Sci &

Technol China Dept Mat Sci &

Engn CAS Key Lab Mat Energy Convers 96 Jinzhai Rd Hefei 230026 Anhui Peoples R China;

Univ Sci &

Technol China Dept Mat Sci &

Engn CAS Key Lab Mat Energy Convers 96 Jinzhai Rd Hefei 230026 Anhui Peoples R China;

Univ Sci &

Technol China Dept Mat Sci &

Engn CAS Key Lab Mat Energy Convers 96 Jinzhai Rd Hefei 230026 Anhui Peoples R China;

Univ Sci &

Technol China Dept Mat Sci &

Engn CAS Key Lab Mat Energy Convers 96 Jinzhai Rd Hefei 230026 Anhui Peoples R China;

Univ Sci &

Technol China Dept Mat Sci &

Engn CAS Key Lab Mat Energy Convers 96 Jinzhai Rd Hefei 230026 Anhui Peoples R China;

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正文语种 eng
中图分类工程材料学;
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1. Kinetics of CO2 electrolysis on composite electrodes consisting of Cu and samaria-doped ceria [J] . Su Taolong, Li Yihang, Xue Shuangshuang, Journal of Materials Chemistry, A. Materials for energy and sustainability . 2019,第4期

机译：Cu和撒玛型掺杂二氧化铈组成的复合电极的CO2电解动力学
2. Effect of samaria-doped ceria (SDC) interlayer on the performance of La0.6Sr0.4Co0.2Fe0.8O3-delta/SDC composite oxygen electrode for reversible solid oxide fuel cells [J] . Shimura Kazuki, Nishino Hanako, Kakinuma Katsuyoshi, Electrochimica Acta . 2017,第期

机译：钐掺杂二氧化铈（SDC）中间层对可逆固体氧化物燃料电池的La0.6SR0.4CO0.2FE0.8O3-DERTA / SDC复合氧气性能的影响
3. Carbon dioxide reduction on the composite of copper and praseodymium-doped ceria electrode in a solid oxide electrolysis cells [J] . Kumari Neetu, Haider M. Ali, Tiwari Pankaj K., Ionics . 2019,第7期

机译：在固体氧化物电解细胞中铜和镨掺杂的铜和镨的复合物的二氧化碳减少
4. DFT STUDIES OF KINETIC BARRIERS OF CO2 REDUCTION ON CU ELECTRODES [C] . Xiaowa Nie, Wenjia Luo, Aravind Asthagiri National Meeting Exhibition . 2013

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6. CO2 Hydrogenation over Nanoceria-Supported Transition Metal Catalysts: Role of Ceria Morphology (Nanorods versus Nanocubes) and Active Phase Nature (Co versus Cu) [O] . Michalis Konsolakis, Maria Lykaki, Sofia Stefa, 2019

机译：纳米氧化铈负载的过渡金属催化剂上的CO2加氢：氧化铈形态（纳米棒与纳米立方）和活性相性质（钴与铜）的作用
7. High durability of La_0.6Sr_0.4Co_0.2Fe_0.8O_{3minus;delta;}/samaria-doped ceria (SDC) composite oxygen electrode with SDC interlayer for reversible solid oxide fuel cell/solid oxide electrolysis cell [O] . Kazuki SHIMURA, Hanako NISHINO, Katsuyoshi KAKINUMA, 2017

机译：La _{0.6的高耐久性 Sr _{0.4 Co _{0.2 Fe _{0.8 O _{3-Δ / Samaria-掺杂的二氧化铈（SDC）复合氧气电极，具有SDC中间层，用于可逆固氧化物燃料电池/固体氧化物电解细胞}}}}}

Kinetics of CO2 electrolysis on composite electrodes consisting of Cu and samaria-doped ceria

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