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Oxygen Vacancy Generation and Stabilization in CeO2-x by Cu Introduction with Improved CO2 Photocatalytic Reduction Activity
Wang, Min; Shen, Meng; Jin, Xixiong; Tian, Jianjian; Li, Mengli; Zhou, Yajun; Zhang, Lingxia; Li, Yongsheng; Shi, Jianlin
2019-05-01
Source PublicationACS CATALYSIS
ISSN2155-5435
Volume9Issue:5Pages:4573
SubtypeArticle
AbstractIntroducing O vacancies into the lattice of a semiconductor photocatalyst can alter its intrinsic electronic properties and band gap, thus enhancing the visible light absorption, promoting the separation/transfer of photogenerated charge carriers, and resultantly elevating the photocatalytic activity of oxide semiconductors. Moreover, O vacancies can help adsorb and activate CO2 on photocatalyst surfaces, which, however, are prone to being filled by O atoms during the photoreduction reaction. In this work, Cu was introduced to increase the O vacancy concentration in CeO2-x and promote the photocatalytic activity of CeO2-x The sample Cu/CeO2-x -0.1 showed the highest photocatalytic activity with a CO yield of 8.25 mu mol g(-1) under 5 h irradiation, which is similar to 26 times that on CeO2-x. According to the analysis of Raman and X-ray photoelectron spectroscopy (XPS) spectra, it has been evidenced that Cu introduction benefits the chemical stabilization of O vacancies in CeO2-x during photocatalytic CO2 reduction, which is responsible for the improved and sustained photocatalytic activity.
Keywordphotocatalysis CeO2 CO2 reduction Cu introduction oxygen vacancy
DOI10.1021/acscatal.8b03975
Language英语
WOS Research AreaChemistry
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:41[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27142
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Wang, Min,Shen, Meng,Jin, Xixiong,et al. Oxygen Vacancy Generation and Stabilization in CeO2-x by Cu Introduction with Improved CO2 Photocatalytic Reduction Activity[J]. ACS CATALYSIS,2019,9(5):4573.
APA Wang, Min.,Shen, Meng.,Jin, Xixiong.,Tian, Jianjian.,Li, Mengli.,...&Shi, Jianlin.(2019).Oxygen Vacancy Generation and Stabilization in CeO2-x by Cu Introduction with Improved CO2 Photocatalytic Reduction Activity.ACS CATALYSIS,9(5),4573.
MLA Wang, Min,et al."Oxygen Vacancy Generation and Stabilization in CeO2-x by Cu Introduction with Improved CO2 Photocatalytic Reduction Activity".ACS CATALYSIS 9.5(2019):4573.
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