中国科学院上海应用物理研究所机构知识库
Advanced  
CAS OpenIR  > 中科院上海应用物理研究所2011-2017年  > 期刊论文
题名:
Crystal Plane Effect of Ceria on Supported Copper Oxide Cluster Catalyst for CO Oxidation: Importance of Metal-Support Interaction
作者: Wang, WW; Yu, WZ; Du, PP; Xu, H; Jin, Z; Si, R; Ma, C; Shi, S; Jia, CJ; Yan, CH
刊名: ACS CATALYSIS
出版日期: 2017
卷号: 7, 期号:2, 页码:1313-1329
关键词: copper-ceria catalyst ; subnanometer clusters ; crystal plane effect ; metal-support interaction ; redox properties
DOI: 10.1021/acscatal/6b03234
文章类型: 期刊论文
英文摘要: Copper ceria as one of the very active catalysts for oxidation reactions has been widely investigated in heterogeneous catalysis. In this work, copper oxide (1 wt % Cu loading) deposited on both ceria nanospheres with a {111}/{100}-terminated surface (1CuCe-NS) and with nanorod exposed {110}/{100} faces (1CuCe-NR) have been prepared for the investigation of crystal plane effects on CO oxidation. Various structural characterizations, especially including aberration-corrected scanning transmission electron microscopy (Cs-STEM), X-ray absorption fine structure (XAFS) technique, and in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS), were used to precisely determine the structure and status of the catalysts. It is found that the copper oxides were formed as subnanometer clusters and were uniformly dispersed on the surface of the ceria support. The results from XAFS combined with the temperature programmed reduction technique (H-2-TPR) reveal that more reducible CuOx clusters with only Cu-O coordination structure exclusively dominated in the surface of ICuCe-NS, while the Cu species in ICuCe-NR existed in both CuO clusters and strongly interacting Cu-[O-x]-Ce. In situ DRIFTS results demonstrate that the CeO2-(110} face induced a strongly bound Cu[O-x]-Ce structure in lCuCe-NR which was adverse to the formation of reduced Cu(I) active sites, resulting in low reactivity in CO oxidation (r(CO) = 1.8 X 10(-6) mol(CO) g(cat)(-1) s(-1) at 118 degrees C); in contrast, CuOx clusters on the CeO2-{111} face were easily reduced to Cu(I) species when they were subjected to interaction with CO, which greatly enhanced the catalytic reactivity (r(CO) = 5.7 X 10(-6) mol(CO) g(-1) s(-1) at 104 degrees C). Thus, for copper ceria catalyst, in comparison with the well-known reactive {110}(CeO2) plane, {111}(CeO2), the most inert plane, exhibits great superiority to induce more catalytically active sites of CuOx clusters. The difference in strength of the interaction between copper oxides and different exposed faces of ceria is intrinsically relevant to the different redox and catalytic properties.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000393539200045
ISSN号: 2155-5435
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/27288
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

Files in This Item:
File Name/ File Size Content Type Version Access License
Crystal Plane Effect of Ceria on Supported Copper Oxide Cluster Catalyst for CO Oxidation_ Importance of Metal-Support Interaction.pdf(3343KB)期刊论文作者接受稿开放获取View 联系获取全文

Recommended Citation:
Wang, WW,Yu, WZ,Du, PP,et al. Crystal Plane Effect of Ceria on Supported Copper Oxide Cluster Catalyst for CO Oxidation: Importance of Metal-Support Interaction[J]. ACS CATALYSIS,2017-01-01,7(2):1313-1329.
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Wang, WW]'s Articles
[Yu, WZ]'s Articles
[Du, PP]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Wang, WW]‘s Articles
[Yu, WZ]‘s Articles
[Du, PP]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: Crystal Plane Effect of Ceria on Supported Copper Oxide Cluster Catalyst for CO Oxidation_ Importance of Metal-Support Interaction.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Powered by CSpace