当前位置: X-MOL 学术Adv. Funct. Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Hollow Multishelled Structure of Heterogeneous Co3O4–CeO2−x Nanocomposite for CO Catalytic Oxidation
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2019-01-18 , DOI: 10.1002/adfm.201806588
Huan Wang 1 , Dan Mao 2 , Jian Qi 2 , Qinghua Zhang 3 , Xiaohong Ma 2 , Shuyan Song 4 , Lin Gu 3 , Ranbo Yu 1 , Dan Wang 2
Affiliation  

Herein, hollow multishelled structure (HoMS) of Co3O4–CeO2−x nanocomposites with controllable molar ratio of Co and Ce elements is synthesized by a general strategy sequential templating approach (STA) with a facile and efficient electrostatic spray process. As a catalyst of carbon monoxide (CO) catalytic oxidation, Co3O4–CeO2−x (Co/Ce = 4/1) HoMS achieves good catalytic activity (complete conversion temperature is 166.9 °C) and stability (100 h). This performance is attributed to synergistic effects between the two components. The combination of Co3O4 and CeO2 not only generates more interfaces of Co3O4–CeO2−x, which is more favorable for the activation of oxygen, but also improves the oxidizability of Co3O4 as well as the capacity of oxygen storage of CeO2. In addition, the relatively larger effective specific surface area of the HoMS can provide more active sites, while the unique structure of HoMS can facilitate gas diffusion and maintain structural stability.

中文翻译:

CO催化氧化异质Co3O4-CeO2-x纳米复合材料的空心多壳结构

在此,通过通用策略的顺序模板法(STA),采用简便有效的静电喷涂工艺,合成了具有可控的Co和Ce元素摩尔比的Co 3 O 4 -CeO 2- x纳米复合材料的空心多壳结构(HoMS)。作为一氧化碳(CO)催化氧化的催化剂,Co 3 O 4 -CeO 2- x(Co / Ce = 4/1)HoMS具有良好的催化活性(完全转化温度为166.9°C)和稳定性(100 h) 。该性能归因于两个组件之间的协同效应。Co 3 O 4和CeO 2的组合不仅生成的Co多个接口3 ö 4 -CeO 2- X,它是氧的活化较为有利,但也提高了Co的氧化性3 ø 4以及储氧的CeO的容量2。此外,HoMS的相对较大的有效比表面积可以提供更多的活性部位,而HoMS的独特结构可以促进气体扩散并保持结构稳定性。
更新日期:2019-01-18
down
wechat
bug