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Mild generation of surface oxygen vacancies on CeO(2)for improved CO(2)photoreduction activity
Wang, M; Shen, M; Jin, XX; Tian, JJ; Zhou, YJ; Shao, YR; Zhang, LX; Li, YS; Shi, JL
2020-06-21
Source PublicationNANOSCALE
ISSN2040-3364
Issue23Pages:12374
SubtypeArticle
AbstractThe vacancy defects of semiconductor photocatalysts play key roles in enhancing their photocatalytic CO(2)reduction activity. In this work, CeO(2)was chosen as a model catalyst and oxygen vacancies were introduced on its surface by a facile and mild oxalic acid treatment followed by moderate heating in N-2. Such a treatment resulted in a much increased ratio of Ce3+/Ce(4+)in CeO2, and the oxygen vacancy-enriched CeO(2)showed remarkably enhanced photocatalytic activity in CO(2)reduction, with CO being the dominant reduction product, whose yield was about 8 times that on the pristine CeO2.In situFT-IR spectra showed that the abundant oxygen vacancies substantially improved the CO(2)adsorption/activation on the surface of CeO2, which facilitated the subsequent reduction of CO2. However, the carbonates strongly adsorbed on the photocatalyst surface might be the main obstacle to maintaining the high CO(2)reduction activity and stability of CeO(2)with O vacancies.
DOI10.1039/d0nr00717j
WOS KeywordCO2 PHOTOREDUCTION ; OXIDATION ; CERIA ; EFFICIENT ; METHANOL
Language英语
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
PublisherROYAL SOC CHEMISTRY
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27965
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Wang, M,Shen, M,Jin, XX,et al. Mild generation of surface oxygen vacancies on CeO(2)for improved CO(2)photoreduction activity[J]. NANOSCALE,2020(23):12374.
APA Wang, M.,Shen, M.,Jin, XX.,Tian, JJ.,Zhou, YJ.,...&Shi, JL.(2020).Mild generation of surface oxygen vacancies on CeO(2)for improved CO(2)photoreduction activity.NANOSCALE(23),12374.
MLA Wang, M,et al."Mild generation of surface oxygen vacancies on CeO(2)for improved CO(2)photoreduction activity".NANOSCALE .23(2020):12374.
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