IHEP OpenIR  > 多学科研究中心
Highly efficient multifunctional dually-substituted perovskite catalysts La1-xKxCo1-yCuyO3-delta used for soot combustion, NOx storage and simultaneous NOx-soot removal
Li, ZQ; Meng, M; Zha, YQ; Dai, FF; Hu, TD; Xie, YN; Zhang, J; Hu TD(胡天斗); Xie YN(谢亚宁); Zhang J(张静)
2012
发表期刊APPLIED CATALYSIS B-ENVIRONMENTAL
卷号121页码:65-74
摘要A series K/Cu simultaneously substituted nanometric perovskite catalysts La1-xKxCo1-yCuyO3-delta (x = 0, 0.1; y = 0, 0.05, 0.1, 0.2, 0.3) were synthesized by citric acid complexation, which were employed for soot combustion, NOx storage and simultaneous NOx-soot removal. The physico-chemical properties of the catalysts were characterized by XRD, FT-IR, EXAFS, SEM, H-2-TPR, Soot-TPR, TG/DTA, XPS and in situ DRIFTS techniques. When K and Cu are simultaneously introduced into LaCoO3, soot combustion is largely accelerated, decreasing the characteristic temperature (T-m) corresponding to the maximal soot combustion rate at least 80 degrees C; moreover, NOx reduction by soot is also remarkably facilitated. Among all the catalysts La0.9K0.1Co0.9Cu0.1O3-delta shows the lowest T-m of 360 degrees C, the highest NOx storage capacity (NSC) of 284 mu mol g(-1) and the largest NOx reduction percentage of 32%; for soot combustion, it also exhibits the lowest activation energy (80.04 kJ mol(-1)). The XPS and Soot-TPR results reveal that the catalyst La0.9K0.1Co0.9Cu0.1O3-delta possesses more active and larger amount of surface oxygen species (O-2(-) and O-), more tetravalent cobalt ions and better reducibility than others, which determines its better catalytic performance. Based on in situ DRIFTS and other characterization results, the potential mechanisms for soot combustion, NOx storage and simultaneous NOx-soot removal are proposed. (c) 2012 Elsevier B.V. All rights reserved.
关键词Soot combustion NOx reduction Perovskite Dual substitution Mechanism
学科领域Chemistry; Engineering
DOI10.1016/j.apcatb.2012.03.022
收录类别SCI
WOS记录号WOS:000305502200008
引用统计
被引频次:50[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/223814
专题多学科研究中心
推荐引用方式
GB/T 7714
Li, ZQ,Meng, M,Zha, YQ,et al. Highly efficient multifunctional dually-substituted perovskite catalysts La1-xKxCo1-yCuyO3-delta used for soot combustion, NOx storage and simultaneous NOx-soot removal[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2012,121:65-74.
APA Li, ZQ.,Meng, M.,Zha, YQ.,Dai, FF.,Hu, TD.,...&张静.(2012).Highly efficient multifunctional dually-substituted perovskite catalysts La1-xKxCo1-yCuyO3-delta used for soot combustion, NOx storage and simultaneous NOx-soot removal.APPLIED CATALYSIS B-ENVIRONMENTAL,121,65-74.
MLA Li, ZQ,et al."Highly efficient multifunctional dually-substituted perovskite catalysts La1-xKxCo1-yCuyO3-delta used for soot combustion, NOx storage and simultaneous NOx-soot removal".APPLIED CATALYSIS B-ENVIRONMENTAL 121(2012):65-74.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
806.pdf(1245KB)期刊论文作者接受稿限制开放CC BY-NC-SA请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Li, ZQ]的文章
[Meng, M]的文章
[Zha, YQ]的文章
百度学术
百度学术中相似的文章
[Li, ZQ]的文章
[Meng, M]的文章
[Zha, YQ]的文章
必应学术
必应学术中相似的文章
[Li, ZQ]的文章
[Meng, M]的文章
[Zha, YQ]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。