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

doi:10.1002/advs.202003343

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	Perovskite Oxynitride Solid Solutions of LaTaON2-CaTaO2N with Greatly Enhanced Photogenerated Charge Separation for Solar-Driven Overall Water Splitting
	Wang, Yawei 1; Kang, Yuyang 4; Zhu, Huaze 4; Liu, Gang 3,4; Irvine, John T. S.2; Xu, Xiaoxiang 1
刊名	ADVANCED SCIENCE
	2020-11-25
页码	8
关键词	oxynitrides perovskites solid solution visible light water splitting
DOI	10.1002/advs.202003343
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)
英文摘要	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.
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
语种	英语
出版者	WILEY
WOS记录号	WOS:000591884200001
资助机构	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
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/141347]
专题	金属研究所_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.Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland 3.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China
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.