-
50浏览
-
0点赞
-
0收藏
-
0分享
-
72下载
-
0评论
-
引用
期刊论文
An investigation on the utilization of perovskite-type oxides La1−xSrxMO3 (M = Co0.77Bi0.20Pd0.03) as three-way catalysts
Applied Catalysis B: Environmental 33(2001)65-80,-0001,():
The perovskite-type oxides La1−xSrxMO3 (M=Co0.77Bi0.20Pd0.03) have been investigated for three-way catalytic performance and characterized by means of temperature-programmed desorption (TPD), temperature-programmed reduction (TPR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The catalysts exhibited good activity in CO elimination: La0.8Sr0.2MO3 showed ca. 100% CO conversion at 160◦C, 60 000 h−1, and λ=1.00. Under similar reaction conditions, the activity for C3H6 elimination decreased in the order of La0.2Sr0.8MO3>La0.8Sr0.2MO3>La0.4Sr0.6MO3>La0.6Sr0.4MO3>LaMO3, while the activity forNOelimination decreased in the order of La0.8Sr0.2MO3>La0.2Sr0.8MO3>La0.4Sr0.6MO3>La0.6Sr0.4MO3>LaMO3. With x<0.6, La1−xSrxMO3 were single-phase and hexagonal in structure; at x=0.6 and 0.8, they were cubic and there was a trace amount of the La2O3 phase. The results of TPD, TPR, and XPS studies revealed the coexistence of over-stoichiometric oxygen vacancies in La0.8Sr0.2MO3, a criterion for good three-way catalytic performance.
【免责声明】以下全部内容由[戴洪兴]上传于[2009年07月01日 10时31分19秒],版权归原创者所有。本文仅代表作者本人观点,与本网站无关。本网站对文中陈述、观点判断保持中立,不对所包含内容的准确性、可靠性或完整性提供任何明示或暗示的保证。请读者仅作参考,并请自行承担全部责任。
本学者其他成果
同领域成果