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Photocatalytic Overall Water Splitting over PbTiO3 Modulated by Oxygen Vacancy and Ferroelectric Polarization

文献类型：期刊论文

作者Wan, Gedeng2,3; Yin, Lichang2,7; Chen, Xing4; Xu, Xiaoxiang5; Huang, Jie2; Zhen, Chao2; Zhu, Huaze2; Huang, Biaohong2,3; Hu, Weijin2,3; Ren, Zhaohui6
刊名JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
出版日期2022-10-26
页码9
ISSN号0002-7863
DOI10.1021/jacs.2c08177
通讯作者Liu, Gang(gangliu@imr.ac.cn)
英文摘要Ferroelectric materials hold great promise in the field of photocatalytic water splitting due to their spontaneous polarization that sets up an inherent internal field for the spatial separation of photogenerated charges. The ferroelectric polarization, however, is generally accompanied by some intrinsic defects, particularly oxygen vacancies, whose impact upon photocatalysis is far from being fully understood and modulated. Here, we have studied the role of oxygen vacancies over the photocatalytic behavior of single-domain PbTiO3 through a combination of theoretical and experimental viewpoints. Our results indicate that the oxygen vacancies in the negatively polarized facet (001) are active sites for water oxidation into O-2, while the defect-free sites prefer H2O2 as the oxidation product. The apparent quantum yield at 435 nm for photocatalytic overall water splitting with PbTiO3/Rh/Cr2O3 is determined to be 0.025%, which is remarkable for single undoped metal oxide-based photocatalysts. Furthermore, the strong correlation among oxygen vacancies, polarization strength, and photocatalytic activity is properly reflected by charge separation conditions in the single-domain PbTiO3 . This work clarifies the crucial role of oxygen vacancies during photocatalytic reactions of PbTiO3, which provides a useful guide to the design of efficient ferroelectric photocatalysts and their water redox reaction pathways.
资助项目National Key R & D Program of China[2021YFA1500800] ; National Natural Science Foundation of China[51825204] ; National Natural Science Foundation of China[52120105003] ; National Natural Science Foundation of China[51972312] ; National Natural Science Foundation of China[52188101] ; CAS Projects for Young Scientists in Basic Research[YSBR-004] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2020192] ; International Partnership Program of Chinese Academy of Sciences[174321KYSB20200005]
WOS研究方向Chemistry
语种英语
出版者AMER CHEMICAL SOC
WOS记录号WOS:000877896500001
资助机构National Key R & D Program of China ; National Natural Science Foundation of China ; CAS Projects for Young Scientists in Basic Research ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; International Partnership Program of Chinese Academy of Sciences
源URL[http://ir.imr.ac.cn/handle/321006/176451]  
专题金属研究所_中国科学院金属研究所
通讯作者Liu, Gang
作者单位1.Univ Queensland, Australian Inst Bioengn & Nanotechnol, Brisbane, Qld 4072, Australia
2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
4.Zhejiang Univ, Ctr Electron Microscopy, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China
5.Tongji Univ, Sch Chem Sci & Engn, Shanghai 200092, Peoples R China
6.Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China
7.Univ Queensland, Sch Chem Engn, Nanomat Ctr, Brisbane, Qld 4072, Australia
8.Chinese Acad Sci, Inst Technol Carbon Neutral, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China
推荐引用方式
GB/T 7714		 Wan, Gedeng,Yin, Lichang,Chen, Xing,et al. Photocatalytic Overall Water Splitting over PbTiO3 Modulated by Oxygen Vacancy and Ferroelectric Polarization[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2022:9.
APA Wan, Gedeng.,Yin, Lichang.,Chen, Xing.,Xu, Xiaoxiang.,Huang, Jie.,...&Cheng, Hui-Ming.(2022).Photocatalytic Overall Water Splitting over PbTiO3 Modulated by Oxygen Vacancy and Ferroelectric Polarization.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,9.
MLA Wan, Gedeng,et al."Photocatalytic Overall Water Splitting over PbTiO3 Modulated by Oxygen Vacancy and Ferroelectric Polarization".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022):9.

入库方式： OAI收割

来源：金属研究所

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