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Perovskite Oxynitride Solid Solutions of LaTaON2-CaTaO2N with Greatly Enhanced Photogenerated Charge Separation for Solar-Driven Overall Water Splitting
Wang, Yawei1; Kang, Yuyang2; Zhu, Huaze2; Liu, Gang2,3; Irvine, John T. S.4; Xu, Xiaoxiang1
Corresponding AuthorLiu, Gang(gangliu@imr.ac.cn) ; Irvine, John T. S.(jtsi@st-andrews.ac.uk) ; Xu, Xiaoxiang(xxxu@tongji.edu.cn)
2020-11-25
Source PublicationADVANCED SCIENCE
Pages8
AbstractThe 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.
Keywordoxynitrides perovskites solid solution visible light water splitting
Funding OrganizationNational 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
DOI10.1002/advs.202003343
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000591884200001
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/141348
Collection中国科学院金属研究所
Corresponding AuthorLiu, Gang; Irvine, John T. S.; Xu, Xiaoxiang
Affiliation1.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
Recommended Citation
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.
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