Perovskite Oxynitride Solid Solutions of LaTaON2-CaTaO2N with Greatly Enhanced Photogenerated Charge Separation for Solar-Driven Overall Water Splitting

doi:10.1002/advs.202003343

IMR OpenIR

	Perovskite Oxynitride Solid Solutions of LaTaON2-CaTaO2N with Greatly Enhanced Photogenerated Charge Separation for Solar-Driven Overall Water Splitting
	Wang, Yawei 1; Kang, Yuyang 2; Zhu, Huaze 2; Liu, Gang 2,3; Irvine, John T. S.4; Xu, Xiaoxiang 1
通讯作者	Liu, Gang(gangliu@imr.ac.cn) ; Irvine, John T. S.(jtsi@st-andrews.ac.uk) ; Xu, Xiaoxiang(xxxu@tongji.edu.cn)
	2020-11-25
发表期刊	ADVANCED SCIENCE
页码	8
摘要	The search for solar-driven photocatalysts for overall water splitting has been actively pursued. Although metal oxynitrides with metal d(0)/d(10)-closed shell configuration are very promising candidates in terms of their visible light absorption, they usually suffer from serious photo-generated charge recombination and thus, little photoactivity. Here, by forming their solid solutions of LaTaON2 and CaTaO2N, which are traditionally considered to be inorganic yellow-red pigments but have poor photocatalytic activity, a class of promising solar-driven photocatalysts La1-xCaxTaO1+yN2-y (0 <= x, y <= 1) are explored. In particular, the optimal photocatalyst with x = 0.9 has the ability of realizing overall water splitting with stoichiometric H-2/O-2 ratio under the illumination of both AM1.5 simulated solar light and visible light. The modulated key parameters including band structure, Ta bonding environment, defects concentration, and band edge alignments revealed in La0.1Ca0.9TaO1+yN2-y have substantially promoted the separation of photogenerated charge carriers with sufficient energetics for water oxidation and reduction reactions. The results obtained in this study provide an important candidate for designing efficient solar-driven photocatalysts for overall water splitting.
关键词	oxynitrides perovskites solid solution visible light water splitting
资助者	National Natural Science Foundation of China ; Natural Science Foundation of Shanghai ; Shanghai Science and Technology Commission ; Fundamental Research Funds for the Central Universities ; Newton Advanced Fellowship
DOI	10.1002/advs.202003343
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51972233] ; National Natural Science Foundation of China[51825204] ; National Natural Science Foundation of China[21633009] ; Natural Science Foundation of Shanghai[19ZR1459200] ; Shanghai Science and Technology Commission[14DZ2261100] ; Fundamental Research Funds for the Central Universities ; Newton Advanced Fellowship
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目	Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000591884200001
出版者	WILEY
引用统计	被引频次：39[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/321006/141348
专题	中国科学院金属研究所
通讯作者	Liu, Gang; Irvine, John T. S.; Xu, Xiaoxiang
作者单位	1.Tongji Univ, Sch Chem Sci & Engn, Shanghai Key Lab Chem Assessment & Sustainabil, Clin & Cent Lab,Putuo Peoples Hosp, Shanghai, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China 4.Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland
推荐引用方式 GB/T 7714	Wang, Yawei,Kang, Yuyang,Zhu, Huaze,et al. Perovskite Oxynitride Solid Solutions of LaTaON2-CaTaO2N with Greatly Enhanced Photogenerated Charge Separation for Solar-Driven Overall Water Splitting[J]. ADVANCED SCIENCE,2020:8.
APA	Wang, Yawei,Kang, Yuyang,Zhu, Huaze,Liu, Gang,Irvine, John T. S.,&Xu, Xiaoxiang.(2020).Perovskite Oxynitride Solid Solutions of LaTaON2-CaTaO2N with Greatly Enhanced Photogenerated Charge Separation for Solar-Driven Overall Water Splitting.ADVANCED SCIENCE,8.
MLA	Wang, Yawei,et al."Perovskite Oxynitride Solid Solutions of LaTaON2-CaTaO2N with Greatly Enhanced Photogenerated Charge Separation for Solar-Driven Overall Water Splitting".ADVANCED SCIENCE (2020):8.