Efficient water oxidation under visible light by tuning surface defects on ceria nanorods. Issue 41 (4th September 2015)

• Record Type: Journal Article
• Authors: Zhao, Kun; Qi, Jian; Yin, Huajie; Wang, Zumin; Zhao, Shenlong; Ma, Xiang; Wan, Jiawei; Chang, Lin; Gao, Yan; Yu, Ranbo; Tang, Zhiyong
• Is Part Of: Journal of materials chemistry. Volume 3:Issue 41(2015)
• Page Start: 20465
• Page End: 20470
• Publication Date: 2015-09-04
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c5ta05817a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Surface defects including oxygen vacancies and Ce 3+ ions on the surface of CeO2 nanorods lead to an efficient catalytic activity towards water oxidation under visible light. Abstract : Fluorite CeO2 nanorods (NRs) with tunable surface defects are successfully prepared via hydrothermal synthesis followed by post-calcination under different atmospheres. Impressively, the CeO2 NRs obtained under mixed Ar and H2 gas at 800 °C exhibit superior catalytic activity towards water oxidation under visible light ( λ ≥ 420 nm), which is 10 times higher than that of CeO2 NRs treated under air at 800 °C. Detailed characterization and theoretical analysis reveal that the rich surface defects including surface oxygen vacancies and Ce 3+ ions are the origin of the enhanced water oxidation performance of the CeO2 NRs treated under the reduced atmosphere.