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Synergetic Effect of Conjugated Ni(OH)(2)/IrO2 Cocatalyst on Titanium-Doped Hematite Photoanode for Solar Water Splitting
Wang, Zhiliang1,2; Liu, Guiji1,2; Ding, Chunmei1,2; Chen, Zheng1,2; Zhang, Fuxiang1; Shi, Jingying1; Li, Can1
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
2015-08-27
DOI10.1021/acs.jpcc.5b04892
Volume119Issue:34Pages:19607-19612
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS KeywordPHOTOELECTROCHEMICAL HYDROGEN-PRODUCTION ; OXYGEN EVOLUTION ; SURFACE-STATES ; LIGHT-DRIVEN ; THIN-FILMS ; OXIDATION ; ENHANCEMENT ; ELECTRODES ; CATALYST ; LAYER
AbstractHematite is a promising photoanode material for renewable solar fuel production via photoelectrochemical (PEC) water splitting. However, the fast electron-hole recombination and sluggish surface reaction retard it from getting satisfied performance. Herein, hematite nanorod arrays doped with titanium (Ti-Fe2O3) on the surface were prepared by a solution-based process. Because of one-dimension anisotropy and improved charge transfer property, the photocurrent density is doubled compared to pure Fe2O3 at 1.50 V vs RHE under simulated sunlight (AM 1.5 G) irradiation. Loading conjugated Ni(OH)(2)/IrO, cocatalyst further leads to about 200 mV negative shift of the onset potential and dramatic increase of the applied bias photon-to-current efficiency (ABPE). We find that Ni(OH)(2) can efficiently capture the photogenerated holes from hematite as a hole-storage layer (HSL) to improve the charge transfer process across the interface of hematite and IrO2 electrocatalyst. Furthermore, the stored photogenerated holes in Ni(OH)(2) can be utilized by IrO2 for water oxidation more facilely. This synergetic effect along with the efficient surface doping are proposed to be responsible for the enhanced performance.
Language英语
WOS IDWOS:000360415700005
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/146495
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Wang, Zhiliang,Liu, Guiji,Ding, Chunmei,et al. Synergetic Effect of Conjugated Ni(OH)(2)/IrO2 Cocatalyst on Titanium-Doped Hematite Photoanode for Solar Water Splitting[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2015,119(34):19607-19612.
APA Wang, Zhiliang.,Liu, Guiji.,Ding, Chunmei.,Chen, Zheng.,Zhang, Fuxiang.,...&Li, Can.(2015).Synergetic Effect of Conjugated Ni(OH)(2)/IrO2 Cocatalyst on Titanium-Doped Hematite Photoanode for Solar Water Splitting.JOURNAL OF PHYSICAL CHEMISTRY C,119(34),19607-19612.
MLA Wang, Zhiliang,et al."Synergetic Effect of Conjugated Ni(OH)(2)/IrO2 Cocatalyst on Titanium-Doped Hematite Photoanode for Solar Water Splitting".JOURNAL OF PHYSICAL CHEMISTRY C 119.34(2015):19607-19612.
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