Solid oxide electrolysis cells (SOECs) hold the promise of directly converting CO into CO fuels with exceptional cost-effectiveness and efficiency. However, the widespread application of SOECs is impeded by the significant lack of highly active and stable cathodes. Herein, a one-pot synthesis strategy is proposed to introduce Cu into a composite consisted of SrFeMoO (SFM) and GdCeO (GDC). This strategy leads to the automatic formation of hetero-structured composites, comprising double perovskite, Ruddlesden-Popper perovskite, fluorite, as well as in-situ exsolved Cu–Fe bimetals at high temperatures and operational conditions. Consequently, this approach greatly enhances CO adsorption capability, CO catalytic activity, O/e conductivity, and ensures good phase compatibility with electrolyte. As results, the LaSrGaMgO electrolyte-supported single cell with the composite cathode achieves a high current density of 2.22 A cm at 850 °C and 1.6 V, which is substantial increase of 65.7% compared to the current density achieved with traditional physically hybrid SFM-GDC cathodes. These results underscore the potential of one-pot synthesized nanocomposites as promising cathodes for CO electrolysis in SOECs.

中文翻译：

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通过一锅法合成自优化且稳定的纳米复合材料，用于固体氧化物电解池中的高温二氧化碳电解

固体氧化物电解电池 (SOEC) 有望以卓越的成本效益和效率直接将二氧化碳转化为二氧化碳燃料。然而，SOEC的广泛应用因严重缺乏高活性和稳定的正极而受到阻碍。在此，提出了一种一锅合成策略，将 Cu 引入由 SrFeMoO (SFM) 和 GdCeO (GDC) 组成的复合材料中。这种策略导致异质结构复合材料的自动形成，包括双钙钛矿、Ruddlesden-Popper钙钛矿、萤石以及在高温和操作条件下原位溶出的Cu-Fe双金属。因此，该方法极大地提高了CO吸附能力、CO催化活性、O/e电导率，并确保了与电解质良好的相容性。结果，具有复合阴极的LaSrGaMgO电解质支持的单电池在850℃和1.6V下实现了2.22Acm的高电流密度，与传统物理混合SFM-实现的电流密度相比大幅提高了65.7％ GDC 阴极。这些结果强调了一锅合成纳米复合材料作为 SOEC 中 CO 电解的有前途的阴极的潜力。