阴极
电解
材料科学
电化学
电解质
氧化物
化学工程
纳米颗粒
电极
纳米技术
无机化学
化学
冶金
工程类
物理化学
作者
Lixiao Zhang,Simin Hu,Wenping Li,Zhongwei Cao,Huanying Liu,Xuefeng Zhu,Weishen Yang
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2019-04-22
卷期号:7 (10): 9629-9636
被引量:36
标识
DOI:10.1021/acssuschemeng.9b01183
摘要
La0.75Sr0.25Cr0.5Mn0.5O3-δ (LSCM) is a promising cathode for CO2 electroreduction in solid oxide electrolysis cells (SOECs), but its low catalytic activity limits the performance of SOECs. In this work, CeO2 nanoparticles with a size of 3–5 nm were successfully impregnated into an LSCM-Gd0.1Ce0.9O1.95 (GDC) composite cathode to investigate its effects on the CO2 electrochemical reduction. The introduction of CeO2 nanoparticles on the LSCM-GDC cathodes can create more three-phase boundaries (TPBs), improve the CO2 adsorption capability, and facilitate the transportation of oxygen ions between the cathode and the electrolyte. Therefore, the nano-CeO2-modified cathodes show better performance than the conventional LSCM-GDC cathode. The maximum current density of the nano-CeO2-modified cathode is about 90% higher than that of the conventional LSCM-GDC cathode at 1.4 V and 800 °C. Therefore, loading nano-CeO2 onto the LSCM-GDC backbone is an effective way to improve the electrocatalytic performance of the conventional LSCM-GDC cathode.
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