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Platinum-Decorated Ceria Enhances CO2 Electroreduction in Solid Oxide Electrolysis Cells.
ChemSusChem ( IF 7.5 ) Pub Date : 2020-05-27 , DOI: 10.1002/cssc.202001002 Weicheng Feng 1, 2 , Yuefeng Song 1 , Xiaomin Zhang 1 , Houfu Lv 1, 2 , Qingxue Liu 1, 2 , Guoxiong Wang 1 , Xinhe Bao 1
ChemSusChem ( IF 7.5 ) Pub Date : 2020-05-27 , DOI: 10.1002/cssc.202001002 Weicheng Feng 1, 2 , Yuefeng Song 1 , Xiaomin Zhang 1 , Houfu Lv 1, 2 , Qingxue Liu 1, 2 , Guoxiong Wang 1 , Xinhe Bao 1
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CO2 electroreduction by solid oxide electrolysis cells (SOECs) can not only attenuate the greenhouse effect, but also convert surplus electrical energy into chemical energy. The adsorption and activation of CO2 on the cathode play an important role in the SOEC performance. La0.6Sr0.4Co0.2Fe0.8O3−δ−Ce0.8Sm0.2O2−δ (LSCF–SDC; SDC=samarium‐doped ceria) is a promising SOEC cathode. However, its electrocatalytic activity still needs to be improved. In this study, Pt/SDC interfaces are constructed by decorating Pt nanoparticles onto the SDC surface. Electrochemical measurements indicate that the polarization resistance of the SOEC is decreased from 0.308 to 0.120 Ω cm2, and the current density is improved from 0.913 to 1.420 A cm−2 at 1.6 V and 800 °C. Physicochemical characterizations suggest that construction of the Pt/SDC interfaces increases the oxygen vacancy concentration on the cathode and boosts CO2 adsorption and dissociation, which leads to enhanced CO2 electroreduction performance in SOECs.
中文翻译：
铂装饰的氧化铈增强了固体氧化物电解池中的CO2还原。
固体氧化物电解槽（SOEC）进行的CO 2电还原不仅可以减弱温室效应，而且可以将多余的电能转化为化学能。阴极上CO 2的吸附和活化在SOEC性能中起重要作用。La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3− δ- Ce 0.8 Sm 0.2 O 2− δ（LSCF–SDC； SDC =掺c的二氧化铈）是有希望的SOEC阴极。但是，其电催化活性仍然需要提高。在这项研究中，Pt / SDC界面是通过将Pt纳米粒子装饰到SDC表面上而构建的。电化学测量表明，在1.6 V和800°C下，SOEC的极化电阻从0.308降低到0.120Ωcm 2，并且电流密度从0.913改善到1.420 A cm -2。理化特征表明，Pt / SDC界面的构建增加了阴极上的氧空位浓度，并促进了CO 2的吸附和离解，从而提高了SOEC中CO 2的电还原性能。
更新日期：2020-05-27
中文翻译：
铂装饰的氧化铈增强了固体氧化物电解池中的CO2还原。
固体氧化物电解槽（SOEC）进行的CO 2电还原不仅可以减弱温室效应，而且可以将多余的电能转化为化学能。阴极上CO 2的吸附和活化在SOEC性能中起重要作用。La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3− δ- Ce 0.8 Sm 0.2 O 2− δ（LSCF–SDC； SDC =掺c的二氧化铈）是有希望的SOEC阴极。但是，其电催化活性仍然需要提高。在这项研究中，Pt / SDC界面是通过将Pt纳米粒子装饰到SDC表面上而构建的。电化学测量表明，在1.6 V和800°C下，SOEC的极化电阻从0.308降低到0.120Ωcm 2，并且电流密度从0.913改善到1.420 A cm -2。理化特征表明，Pt / SDC界面的构建增加了阴极上的氧空位浓度，并促进了CO 2的吸附和离解，从而提高了SOEC中CO 2的电还原性能。
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