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New BiVO4 Dual Photoanodes with Enriched Oxygen Vacancies for Efficient Solar-Driven Water Splitting
Wang, SC; Chen, P; Bai, Y; Yun, JH; Liu, G; Wang, LZ; Wang, LZ (reprint author), Univ Queensland, Nanomat Ctr, Sch Chem Engn, Brisbane, Qld 4072, Australia.; Wang, LZ (reprint author), Univ Queensland, Australian Inst Bioengn & Nanotechnol, Brisbane, Qld 4072, Australia.; Liu, G (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.; Liu, G (reprint author), Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
2018-05-17
Source PublicationADVANCED MATERIALS
ISSN0935-9648
Volume30Issue:20Pages:-
AbstractBismuth vanadate (BiVO4) is a promising photoanode material for photo-electrochemical (PEC) water splitting. However, owing to the short carrier diffusion length, the trade-off between sufficient light absorption and efficient charge separation often leads to poor PEC performance. Herein, a new electrodeposition process is developed to prepare bismuth oxide precursor films, which can be converted to transparent BiVO4 films with well-controlled oxygen vacancies via a mild thermal treatment process. The optimized BiVO4 film exhibits an excellent back illumination charge separation efficiency mainly due to the presence of enriched oxygen vacancies which act as shallow donors. By loading FeOOH/NiOOH as the cocatalysts, the BiVO4 dual photoanodes exhibit a remarkable and highly stable photocurrent density of 5.87 mA cm(-2) at 1.23 V versus the reversible hydrogen electrode under AM 1.5 G illumination. An artificial leaf composed of the BiVO4/FeOOH/NiOOH dual photoanodes and a single sealed perovskite solar cell delivers a solar-to-hydrogen conversion efficiency as high as 6.5% for unbiased water splitting.; Bismuth vanadate (BiVO4) is a promising photoanode material for photo-electrochemical (PEC) water splitting. However, owing to the short carrier diffusion length, the trade-off between sufficient light absorption and efficient charge separation often leads to poor PEC performance. Herein, a new electrodeposition process is developed to prepare bismuth oxide precursor films, which can be converted to transparent BiVO4 films with well-controlled oxygen vacancies via a mild thermal treatment process. The optimized BiVO4 film exhibits an excellent back illumination charge separation efficiency mainly due to the presence of enriched oxygen vacancies which act as shallow donors. By loading FeOOH/NiOOH as the cocatalysts, the BiVO4 dual photoanodes exhibit a remarkable and highly stable photocurrent density of 5.87 mA cm(-2) at 1.23 V versus the reversible hydrogen electrode under AM 1.5 G illumination. An artificial leaf composed of the BiVO4/FeOOH/NiOOH dual photoanodes and a single sealed perovskite solar cell delivers a solar-to-hydrogen conversion efficiency as high as 6.5% for unbiased water splitting.
description.department[wang, songcan ; chen, peng ; bai, yang ; yun, jung-ho ; wang, lianzhou] univ queensland, nanomat ctr, sch chem engn, brisbane, qld 4072, australia ; [wang, songcan ; chen, peng ; bai, yang ; yun, jung-ho ; wang, lianzhou] univ queensland, australian inst bioengn & nanotechnol, brisbane, qld 4072, australia ; [liu, gang] chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, liaoning, peoples r china ; [liu, gang] univ sci & technol china, sch mat sci & engn, 72 wenhua rd, shenyang 110016, liaoning, peoples r china
KeywordBismuth Vanadate Photoanodes Photoelectrochemical Performance Oxidation Catalyst Photocatalysis Absorption Hydrogen Progress Oxides Layer
Subject AreaChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
Funding OrganizationAustralian Research Council through DP program; Australian Research Council through FF program; Australian Research Council through DECRA program; National Natural Science Foundation of China [51629201]; Australian Government Research Training Program; UQ Centennial Scholarship
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79304
Collection中国科学院金属研究所
Corresponding AuthorWang, LZ (reprint author), Univ Queensland, Nanomat Ctr, Sch Chem Engn, Brisbane, Qld 4072, Australia.; Wang, LZ (reprint author), Univ Queensland, Australian Inst Bioengn & Nanotechnol, Brisbane, Qld 4072, Australia.; Liu, G (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.; Liu, G (reprint author), Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Wang, SC,Chen, P,Bai, Y,et al. New BiVO4 Dual Photoanodes with Enriched Oxygen Vacancies for Efficient Solar-Driven Water Splitting[J]. ADVANCED MATERIALS,2018,30(20):-.
APA Wang, SC.,Chen, P.,Bai, Y.,Yun, JH.,Liu, G.,...&Liu, G .(2018).New BiVO4 Dual Photoanodes with Enriched Oxygen Vacancies for Efficient Solar-Driven Water Splitting.ADVANCED MATERIALS,30(20),-.
MLA Wang, SC,et al."New BiVO4 Dual Photoanodes with Enriched Oxygen Vacancies for Efficient Solar-Driven Water Splitting".ADVANCED MATERIALS 30.20(2018):-.
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