Crystal Plane Effect of Ceria on Supported Copper Oxide Cluster Catalyst for CO Oxidation: Importance of Metal-Support Interaction
Wang, WW; Yu, WZ; Du, PP; Xu, H; Jin, Z; Si, R; Ma, C; Shi, S; Jia, CJ; Yan, CH
2017
发表期刊ACS CATALYSIS
ISSN2155-5435
卷号7期号:2页码:1313-1329
文章类型期刊论文
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.
关键词Copper-ceria Catalyst Subnanometer Clusters Crystal Plane Effect Metal-support Interaction Redox Properties
DOI10.1021/acscatal/6b03234
收录类别SCI
语种英语
WOS记录号WOS:000393539200045
引用统计
被引频次:30[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/27288
专题中科院上海应用物理研究所2011-2018年
推荐引用方式
GB/T 7714
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,2017,7(2):1313-1329.
APA Wang, WW.,Yu, WZ.,Du, PP.,Xu, H.,Jin, Z.,...&Yan, CH.(2017).Crystal Plane Effect of Ceria on Supported Copper Oxide Cluster Catalyst for CO Oxidation: Importance of Metal-Support Interaction.ACS CATALYSIS,7(2),1313-1329.
MLA Wang, WW,et al."Crystal Plane Effect of Ceria on Supported Copper Oxide Cluster Catalyst for CO Oxidation: Importance of Metal-Support Interaction".ACS CATALYSIS 7.2(2017):1313-1329.
条目包含的文件 下载所有文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
Crystal Plane Effect(3343KB)期刊论文作者接受稿开放获取CC BY-NC-SA浏览 下载
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
[Wang, WW]的文章
[Yu, WZ]的文章
[Du, PP]的文章
百度学术
百度学术中相似的文章
[Wang, WW]的文章
[Yu, WZ]的文章
[Du, PP]的文章
必应学术
必应学术中相似的文章
[Wang, WW]的文章
[Yu, WZ]的文章
[Du, PP]的文章
相关权益政策
暂无数据
收藏/分享
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
 

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。