Journal
NANOSCALE
Volume 7, Issue 27, Pages 11686-11691Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr01846c
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Funding
- National Natural Science Foundation [21201138, 21401148]
- Ministry of Science and Technology of China through a 973-program [2012CB619401]
- Fundamental Research Funds for the Central Universities [xjj2013102, xjj2013043]
- Center of Nanomaterials for Renewable Energy, School of Electrical Engineering, Xi'an Jiaotong University
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Controllable surface properties of nanocerias are desired for various catalytic processes. There is a lack of efficient approaches to adjust the surface properties of ceria to date. Herein, a redox chemical etching method was developed to controllably engineer the surface properties of ceria nanorods. Ascorbic acid and hydrogen peroxide were used to perform the redox chemical etching process, resulting in a rough surface and/or pores on the surface of ceria nanorods. Increasing the etching cycles induced a steady increase of the specific surface area, oxygen vacancies and surface Ce3+ fractions. As a result, the etched nanorods delivered enhanced catalytic activity for CO oxidation, compared to the non-etched ceria nanorods. Our method provides a novel and facile approach to continuously adjust the surface properties of ceria for practical applications.
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