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Fabrication and Kinetic Study of a Ferrihydrite-Modified BiVO4 Photoanode
Yu, Fengshou1; Li, Fei1; Yao, Tingting2; Du, Jian1; Liang, Yongqi1; Wang, Yong1; Han, Hongxian2; Sun, Licheng1,3
KeywordBismuth Vanadate Water Splitting Photoanode Passivation Ferrihydrite
Source PublicationACS CATALYSIS
2017-03-01
ISSN2155-5435
DOI10.1021/acscatal.6b03483
Volume7Issue:3Pages:1868-1874
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical
WOS Research AreaChemistry
WOS KeywordPHOTOELECTROCHEMICAL WATER OXIDATION ; MODULATED PHOTOCURRENT SPECTROSCOPY ; OXYGEN EVOLUTION ; PHOTOGENERATED HOLES ; CHARGE SEPARATION ; IRON-OXIDE ; SOLAR ; EFFICIENT ; IMPEDANCE ; DYNAMICS
AbstractIn spite of great progress in the surface modification of semiconductor photoelectrodes, the role of the metal oxide cocatalyst on photoelectrochemical (PEC) performance is still not well understood. In this study, ferrihydrite (Fh) as a novel cocatalyst was decorated on a wormlike nanoporous BiVO4 photoanode. A surface kinetics study of Fh/BiVO4 by intensity-modulated photocurrent spectroscopy (IMPS) evidences the primary role of Fh on PEC performance enhancement, varying with the loading of Fh. It was found that dispersed Fh le nanoparticles accelerate hole transfer for water oxidation, but the resulting photoanode suffers from poor stability. The thick layers of Fh address the stability of the electrode by suppressing surface charge recombination but result in reduced hole transfer rates. Modification of a BiVO4 film with optimally thick layers of discrete nanoflakes effectively reduces charge recombination without compromising stability, leading to a high AM 1.5 G photocurrent of 4.78 mA/cm(2) at 1.23 V versus the reversible hydrogen electrode and an applied bias photon to current efficiency of 1.81% at 0.61 V. These values are comparable to the best results reported for undoped BiVO4.
Language英语
WOS IDWOS:000395726500045
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/169369
Collection中国科学院大连化学物理研究所
Corresponding AuthorLi, Fei
Affiliation1.Dalian Univ Technol, State Key Lab Fine Chem, DUT KTH Joint Educ & Res Ctr Mol Devices, Dalian 116024, Peoples R China
2.Chinese Acad Sci, Dalian Natl Lab Clean Energy, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
3.KTH Royal Inst Technol, Sch Chem Sci & Engn, Dept Chem, S-10044 Stockholm, Sweden
Recommended Citation
GB/T 7714
Yu, Fengshou,Li, Fei,Yao, Tingting,et al. Fabrication and Kinetic Study of a Ferrihydrite-Modified BiVO4 Photoanode[J]. ACS CATALYSIS,2017,7(3):1868-1874.
APA Yu, Fengshou.,Li, Fei.,Yao, Tingting.,Du, Jian.,Liang, Yongqi.,...&Sun, Licheng.(2017).Fabrication and Kinetic Study of a Ferrihydrite-Modified BiVO4 Photoanode.ACS CATALYSIS,7(3),1868-1874.
MLA Yu, Fengshou,et al."Fabrication and Kinetic Study of a Ferrihydrite-Modified BiVO4 Photoanode".ACS CATALYSIS 7.3(2017):1868-1874.
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