在现场自组装的活跃和稳定的Ir@MnOx/La0.7Sr0.3Cr0.9Ir0.1O3-δ接口用于CO2电解
Yuxiang Shen1,2, Shuo Wang1, Rongtan Li1
1State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
Angewandte Chemie (International ed. in English)
|May 13, 2024
概括
研究人员使用一种新型的氧化 (MnO_x) /兰石化氧化 (LSCIr) 催化剂改进了二氧化碳 (CO2) 电解. 这种新的催化剂增强了二氧化碳的激活和稳定性,将电解性能提高了42%.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 固体氧化物电解电池 (SOEC) 提供了有前途的二氧化碳利用途径.
- 在SOEC中,燃料电极因反应动力学缓慢和稳定性差而受到影响.
- 在催化剂中,解脱增强和结构稳定性之间存在一个权衡.
研究的目的:
- 通过开发稳定且活跃的燃料电极催化剂来应对二氧化碳电解方面的挑战.
- 在原子尺度上研究催化剂的动态表面重建.
- 通过催化剂设计,提高CO2电解的性能和稳定性.
主要方法:
- 拓性离子交换用于催化剂修饰.
- 表面动态重建的原子尺度可视化.
- 催化剂接口的现场表征 (Ir@MnO_x/LSCIr).
主要成果:
- 在现场自组装的Ir@MnO_x/LSCIr接口显示了增强的CO2激活和更容易的碳酸盐中间体去除.
- 在1.6V时,CO2电解性能得到了42%的改进.
- 统一的MnO_x外包装提高了Ir@MnO_x/LSCIr阴极的稳定性.
结论:
- 该研究提供了对活跃接口上的动态微观结构演变的原子级洞察力.
- 开发的MnO_x/LSCIr催化剂为高效的二氧化碳电解提供了一个有希望的解决方案.
- 这项工作提出了设计和评估高效的二氧化碳利用金属/氧化物催化剂的路线图.
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