Effect of Nd-incorporation and K-modification on catalytic performance of Co3O4 for N2O decomposition

作     者：ZHAO Tian-qi GAO Qiang LIAO Wei-ping XU Xiu-feng ZHAO Tian-qi;GAO Qiang;LIAO Wei-ping;XU Xiu-feng

作者机构：School of Chemistry and Chemical EngineeringYantai UniversityYantai 264005China 

出 版 物：《燃料化学学报》 (Journal of Fuel Chemistry and Technology)

年 卷 期：2019年第47卷第9期

页      面：1120-1128页

核心收录：

学科分类：0820[工学-石油与天然气工程] 081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 0703[理学-化学] 0702[理学-物理学] 

基　　金：The project was supported by the Shandong Natural Science Foundation (ZR2017MB020) Graduate Innovation Foundation of Yantai University (YDYB1909) 

主　　题：catalytic decomposition of N2O Nd-Co3O4 catalysts K-modified catalysts catalytic activity 

摘      要：Nd-Co 3O 4 catalysts were prepared by hydrothermal and co-precipitation methods to catalyze the decomposition of N 2O. The catalysts prepared by hydrothermal method showed higher activity. Among the hydrothermal Nd-Co 3O 4 catalysts, the catalyst with Nd/Co molar ratio of 0.01 had higher activity. 0.01Nd-Co 3O 4 catalyst was then impregnated by K 2CO 3 solution to prepare K-modified catalyst. The catalysts were characterized by means of X-ray diffraction (XRD), nitrogen physisorption, scanning electrons microscopy (SEM), X-ray photoelectron spectroscopy (XPS), hydrogen temperature-programmed reduction (H 2-TPR), and oxygen temperature-programmed desorption (O 2-TPD). The results show that Nd-Co 3O 4 and K-modified catalysts exhibit spinel structure. In contrast to bare Nd-Co 3O 4, the K-modified catalyst with higher activity is due to its weaker strength of Co-O bond and easier desorption of surface oxygen species. In addition, over 90% conversion of N 2O can be reached over 0.02K/0.01Nd-Co 3O 4 at 350 ℃ for 40 h under the co-presence of oxygen and steam in feed gases.