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

doi:10.1021/jacs.2c08177

IMR OpenIR

	Photocatalytic Overall Water Splitting over PbTiO3 Modulated by Oxygen Vacancy and Ferroelectric Polarization
	Wan, Gedeng 1,2; Yin, Lichang 1,6; Chen, Xing 3; Xu, Xiaoxiang 4; Huang, Jie 1; Zhen, Chao 1; Zhu, Huaze 1; Huang, Biaohong 1,2; Hu, Weijin 1,2; Ren, Zhaohui 5; Tian, He 3; Wang, Lianzhou 7; Liu, Gang 1,2; Cheng, Hui-Ming 1,8
通讯作者	Liu, Gang(gangliu@imr.ac.cn)
	2022-10-26
发表期刊	JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
ISSN	0002-7863
页码	9
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.
资助者	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
DOI	10.1021/jacs.2c08177
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Multidisciplinary
WOS记录号	WOS:000877896500001
出版者	AMER CHEMICAL SOC
引用统计	被引频次：105[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/176455
专题	中国科学院金属研究所
通讯作者	Liu, Gang
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Zhejiang Univ, Ctr Electron Microscopy, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China 4.Tongji Univ, Sch Chem Sci & Engn, Shanghai 200092, Peoples R China 5.Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China 6.Univ Queensland, Sch Chem Engn, Nanomat Ctr, Brisbane, Qld 4072, Australia 7.Univ Queensland, Australian Inst Bioengn & Nanotechnol, 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.