钴酸镧基钙钛矿耦合非热等离子体催化转化 CO2的实验研究

作者：Lu Shiwen; Wu Kang; Liu Peng; Huang Haomin; Ye Daiqi^*

来源：Acta Scientiae Circumstantiae, 2023, 43(2): 424-432.

DOI：10.13671/j.hjkxxb.2022.0350

• CO2 reduction
• Lanthanum cobaltate
• non-thermal plasma catalysis
• oxygen vacancy
• synergy

The reduction and utilization of CO2 is one of the important ways to achieve carbon peaking and carbon neutrality. In this work，a series of perovskite catalysts by the Sr and Zr cations doping into the LaCoO3 structure，including LaCoO3，La0.9Sr0.1CoO3-σ，La0.9Sr0.1Co0.9Zr0.1O3+σ，and La0.9Sr0.1Co0.9Zr0.1O3，were synthesized by a sol-gel strategy and investigated the plasma-catalytic CO2 reduction to CO and CH4. The highest performances were obtained when the catalysts（La0.9Sr0.1Co0.9Zr0.1O3）were co-doped with the Sr and Zr cations at the A sites and B sites，respectively. The CO2 conversion rate（28.7%）of the La0.9Sr0.1Co0.9Zr0.1O3 catalysts was better than that of the empty reactor（23.7%）and LaCoO3（10.7%）. The XRD，SEM，Raman，XPS，H2-TPR，and CO2-TPD results showed that compared with LaCoO3 catalysts，the La0.9Sr0.1Co0.9Zr0.1O3 catalysts with the stable architecture presented the smaller particle size，larger specific surface areas，promising pore structure，and abundant oxygen vacancies，which facilitated the adsorption and activation of more CO2 and thus contributed to the plasma-catalytic conversion of CO2. The development of the catalysts is of profound significance for the application of high-efficiency plasma-catalytic system to CO2 reduction and utilization. ? 2023 Science Press.

• 单位
  华南理工大学