材料科学
极化(电化学)
纳米颗粒
氧化物
电解
电极
金属
电解质
化学工程
纳米技术
化学
冶金
工程类
物理化学
作者
Xinyi Gao,Lingting Ye,Kui Xie
标识
DOI:10.1016/j.jpowsour.2023.232740
摘要
Improving the catalytic activity of perovskite electrodes by loading metal nanoparticles through interface engineering is one of the research hotspots in the field of CO2 electrolysis in solid oxide electrolytic cell (SOEC). The challenge is to improve the stability and carbon resistance of the metal-oxide interface while reducing time costs and improving scalability. We used applied voltage-driven reduction and non-stoichiometric doping to make Fe nanoparticles uniformly and firmly anchored on the surface of Sr2Fe1.5+xMo0.5O6-δ (SF1.5+xM, x = 0, 0.025, 0.05, 0.075, 0.1) within 180 s, optimized the distribution of Fe nanoparticles on the surface of SF1.5+xM, and thus constructed a metal-oxide interface with high activity and high stability, effectively preventing the sintering and carbon deposition of metal particles. When the electrode composition is SF1.575 M, the CO yield is 4.0 mL·min-1·cm-2, while the polarization impedance is 0.155 Ω·cm-2, at 850 °C, 1.6 V. It can be said that voltage-driven reduction is an effective and efficient method applied to interface engineering.
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