Reducing the vacancies associated with ferroelectric polarization to promote photocatalytic overall water splitting

doi:10.1007/s11426-024-2152-5

IMR OpenIR

	Reducing the vacancies associated with ferroelectric polarization to promote photocatalytic overall water splitting
	Qi, Haozhi 1,2; Kang, Yuyang 1,2; Liu, Jian-An 1,2; Yin, Lichang 1,2; Zhang, Wenyu 1,2; Ma, Shangyi 1,2; Qiu, Jianhang 1,2; Li, Lingli 1,2; Hu, Weijin 1,2; Wang, Lianzhou 3,4; Liu, Gang 1,2
通讯作者	Liu, Gang(gangliu@imr.ac.cn)
	2024-08-16
发表期刊	SCIENCE CHINA-CHEMISTRY
ISSN	1674-7291
页码	7
摘要	Ferroelectric materials hold great promise in photocatalytic water splitting because their built-in electric field induced by the depolarization field can fulfill the separation of photogenerated carriers. However, a number of intrinsic charged vacancy defects are simultaneously generated to screen the depolarized field for stabilizing the crystal structure, always resulting in severe recombination of photogenerated carriers and thus poor overall water splitting activity. Herein, we proposed a strategy to promote the separation and transport of photogenerated carriers of ferroelectric photocatalysts by adjusting the ferroelectric polarization and altering the coordination environment of elements to reduce the defect concentration. Specifically, we prepared a series of Ta-doped PbTiO3 with low Pb (VPb) and O (VO) vacancy concentrations by reducing the polarization intensity and strengthening the Pb-O interaction. The Ta-doped PbTiO3 shows efficient charge separation and greatly enhanced photocatalytic overall water splitting activity with the assistance of cocatalyst. This work highlights the importance of regulating ferroelectric polarization and vacancy defect concentration by the doping strategy in charge separation for photocatalytic water splitting.
关键词	PbTiO3 ferroelectric polarization vacancy defect element doping photocatalytic overall water splitting
资助者	National Natural Science Foundation of China ; National Key R&D Program of China ; CAS Projects for Young Scientists in Basic Research ; International Partnership Program of the Chinese Academy of Sciences ; New Cornerstone Science Foundation through the XPLORER PRIZE
DOI	10.1007/s11426-024-2152-5
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52425201] ; National Natural Science Foundation of China[52120105003] ; National Natural Science Foundation of China[52002377] ; National Natural Science Foundation of China[52372243] ; National Key R&D Program of China[2021YFA1500800] ; CAS Projects for Young Scientists in Basic Research[YSBR-004] ; International Partnership Program of the Chinese Academy of Sciences[174321KYSB20200005] ; New Cornerstone Science Foundation through the XPLORER PRIZE
WOS研究方向	Chemistry
WOS类目	Chemistry, Multidisciplinary
WOS记录号	WOS:001293201400005
出版者	SCIENCE PRESS
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/189080
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 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Univ Queensland, Nanomat Ctr, Sch Chem Engn, Brisbane, Qld 4072, Australia 4.Univ Queensland, Australian Inst Bioengn & Nanotechnol, Brisbane, Qld 4072, Australia
推荐引用方式 GB/T 7714	Qi, Haozhi,Kang, Yuyang,Liu, Jian-An,et al. Reducing the vacancies associated with ferroelectric polarization to promote photocatalytic overall water splitting[J]. SCIENCE CHINA-CHEMISTRY,2024:7.
APA	Qi, Haozhi.,Kang, Yuyang.,Liu, Jian-An.,Yin, Lichang.,Zhang, Wenyu.,...&Liu, Gang.(2024).Reducing the vacancies associated with ferroelectric polarization to promote photocatalytic overall water splitting.SCIENCE CHINA-CHEMISTRY,7.
MLA	Qi, Haozhi,et al."Reducing the vacancies associated with ferroelectric polarization to promote photocatalytic overall water splitting".SCIENCE CHINA-CHEMISTRY (2024):7.