Catalytic properties of LaNiO3 and Mn-modified LaNiO3 catalysts for oxidation of CO and benzene
Catalytic properties of LaNiO3 and Mn-modified LaNiO3 catalysts for oxidation of CO and benzene
复制标题
LaNiO3和Mn改性LaNiO3催化剂氧化CO和苯的催化性能
DOI：
10.1016/j.cattod.2022.07.002
复制
发表时间：
2023
期刊：
影响因子：
5.3
通讯作者：
Hisahiro Einaga
中科院分区：
文献类型：
--
作者：
Hajime Hojo;Yuka Inohara;Ryo Ichitsubo;Hisahiro Einaga
在B位含有过渡金属的ABO 3型钙钛矿氧化物是氧化反应的有效催化剂。采用水解沉淀法制备LaNiO 3，并采用浸渍法对LaNiO 3进行Mn改性。LaNiO 3比LaCoO 3、LaMnO 3和LaFeO 3具有更高的CO氧化活性。程序升温氢还原（H2-TPR）和CO-TPR研究证实，LaNiO 3的高活性是由于LaNiO 3中晶格氧的反应活性。Mn修饰的LaNiO 3对苯的氧化活性高于LaNiO 3。Mn改性LaNiO 3催化剂的CO氧化性能与其H2-还原性能相关，而苯氧化性能随着Mn含量的增加而提高。
ABO3-type perovskite oxides containing transition metals at the B site are effective catalysts for oxidation reactions. In this study, LaNiO3was prepared by the hydrolysis-precipitation method, and LaNiO3was modified with Mn by the impregnation method. LaNiO3showed higher CO oxidation activity than LaCoO3, LaMnO3, and LaFeO3. The high activity of LaNiO3was attributed to the reactivity of the lattice oxygen in LaNiO3, as confirmed by temperature-programmed reduction by H2(H2-TPR) and CO-TPR studies. The Mn-modified LaNiO3exhibited higher activity for benzene oxidation than LaNiO3. The CO oxidation properties of the Mn-modified LaNiO3catalysts correlated with their H2-reduction properties, whereas benzene oxidation properties were improved by the increasing amount of Mn on the catalyst surface.