A facile synthesis for hierarchical porous CeO2 nanobundles and their superior catalytic performance for CO oxidation
A facile synthesis for hierarchical porous CeO2 nanobundles and their superior catalytic performance for CO oxidation
复制标题
分级多孔CeO2纳米束的简便合成及其优异的CO氧化催化性能
DOI：
10.1039/c4ta03875d
复制
发表时间：
2015
影响因子：
11.9
通讯作者：
RC Rao, M Yang,CS Li, HZ Dong
中科院分区：
文献类型：
--
作者：
RC Rao, M Yang,CS Li, HZ Dong
在这项研究中，我们开发了一种简便的水热路线，通过在碳酸盐辅助的甲醛水热体系中无模板和表面活性剂的各向异性CeO2前体的设计和生长，构建具有分级结构的多孔CeO2纳米束的纳米结构。该合成方法的关键是在水热处理过程中控制碳酸根和铵离子促进的甲酸根和碳酸根形成各向异性的CeO2前驱体。所制备的CeO2纳米束具有由许多直径较小的纳米棒组装而成的分级多孔结构，与传统沉淀法和甲醛辅助水热法制备的CeO2纳米棒、纳米线和纳米颗粒相比，具有更高的CO氧化催化活性。纳米束的出色催化性能归因于其优异的物理化学性质，例如较大的晶格晶胞参数，大得多的表面积和CeO2表面上的表面氧的最佳氧化还原行为。
In this study, we develop a facile hydrothermal route to build a nanostructure of porous CeO2 nanobundles with hierarchical architectures by the design and growth of anisotropic CeO2 precursors in a carbonate-assisted formaldehyde hydrothermal system without templates and surfactants. The key to this synthesis is to control the formation of their anisotropic CeO2 precursors with formate and carbonate promoted by carbonate and ammonium ions during the hydrothermal treatment. The as-prepared CeO2 nanobundles have a hierarchical porous structure assembled by numerous nanorods with a small diameter, and they show much higher catalytic activities for CO oxidation compared with CeO2 nanorods, nanowires and nanoparticles prepared by formaldehyde-assisted hydrothermal treatment and traditional precipitation methods. The outstanding catalytic performance for the nanobundles is attributed to their excellent physicochemical properties such as larger lattice cell parameters, much larger surface areas and the best redox behaviour of surface oxygen on the CeO2 surface.
登录
查看更多内容
影响因子：
3.1
作者：
Jingjing Wei;Zhijie Yang;Yanzhao Yang
通讯作者：
Jingjing Wei;Zhijie Yang;Yanzhao Yang
影响因子：
10.8
作者：
Qu Y;Liao L;Li Y;Zhang H;Huang Y;Duan X
通讯作者：
Duan X
影响因子：
3.8
作者：
A. Neimark;K. Sing;M. Thommes
通讯作者：
A. Neimark;K. Sing;M. Thommes
影响因子：
7.3
作者：
D. Mullins;S. Overbury
通讯作者：
D. Mullins;S. Overbury
影响因子：
3.1
作者：
Yuhua Zheng;Kai Liu;H. Qiao;Yibo Zhang;Yanhua Song;Mei Yang;Yeju Huang;N. Guo;Yongchao Jia;Hongpeng You
通讯作者：
Yuhua Zheng;Kai Liu;H. Qiao;Yibo Zhang;Yanhua Song;Mei Yang;Yeju Huang;N. Guo;Yongchao Jia;Hongpeng You