当前位置：
X-MOL 学术
›
J. Phys. Chem. C
›
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.)
Reversible Oxygen Vacancy Generation on Pure CeO2 Nanorods Evaluated by in Situ Raman Spectroscopy
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2017-05-28 00:00:00 , DOI: 10.1021/acs.jpcc.7b03155 Isaías de Castro Silva 1 , Fernando Aparecido Sigoli 1 , Italo Odone Mazali 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2017-05-28 00:00:00 , DOI: 10.1021/acs.jpcc.7b03155 Isaías de Castro Silva 1 , Fernando Aparecido Sigoli 1 , Italo Odone Mazali 1
Affiliation
|
To observe oxygen vacancy influence over pure CeO2 Raman spectrum profile, nanorods were synthesized and submitted to an in situ strategy to generate or suppress reversibly the oxygen vacancies. No changes were observed in CeO2 nanorod Raman spectra. However, after the comminution of these nanorods, a reversible frequency downshift in CeO2 T2g Raman band was observed. The catalytic activities of CO oxidation were compared for both pristine and comminuted samples. The results indicate that the comminuted sample show higher catalytic activity than the pristine one. This enhancement on catalytic activity is attributed to the exposure of the CeO2 {110} crystals facets after the comminution process.
中文翻译：
原位拉曼光谱法评估纯CeO 2纳米棒上可逆的氧空位生成
为了观察氧空位对纯CeO 2拉曼光谱图的影响，合成了纳米棒，并采用原位策略生成或可逆地抑制氧空位。在CeO 2纳米棒拉曼光谱中未观察到变化。然而，在粉碎这些纳米棒之后，观察到CeO 2 T 2g拉曼能带中可逆的频率下移。比较了原始样品和粉碎后样品的CO氧化催化活性。结果表明，粉碎后的样品显示出比原始样品更高的催化活性。催化活性的这种增强归因于粉碎过程后CeO 2 {110}晶体小平面的暴露。
更新日期：2017-06-06
中文翻译：
原位拉曼光谱法评估纯CeO 2纳米棒上可逆的氧空位生成
为了观察氧空位对纯CeO 2拉曼光谱图的影响，合成了纳米棒，并采用原位策略生成或可逆地抑制氧空位。在CeO 2纳米棒拉曼光谱中未观察到变化。然而，在粉碎这些纳米棒之后，观察到CeO 2 T 2g拉曼能带中可逆的频率下移。比较了原始样品和粉碎后样品的CO氧化催化活性。结果表明，粉碎后的样品显示出比原始样品更高的催化活性。催化活性的这种增强归因于粉碎过程后CeO 2 {110}晶体小平面的暴露。
京公网安备 11010802027423号