Gradient FeOx(PO4)(y) Layer on Hematite Photoanodes: Novel Structure for Efficient Light-Driven Water Oxidation
Zhang, YC; Zhou, ZC; Chen, CC; Che, YK; Ji, HW; Ma, WH; Zhang, J; Song, DY; Zhao, JC;张静; Song DY(宋冬燕)
刊名ACS APPLIED MATERIALS & INTERFACES
2014
卷号6期号:15页码:12844-12851
关键词hematite gradient FeOx(PO4)(y) water oxidation hole diffusion length
学科分类Science & Technology - Other Topics; Materials Science
DOI10.1021/am502821d
英文摘要Hematite has been receiving increasing attention for its application in photoelectrochemical (PEC) water oxidation but usually exhibits poor efficiency. We fabricated a stable gradient-structured FeOx(PO4)(y) layer on hematite by diffusively incorporating phosphate onto the surface layer of hematite films at a low temperature. X-ray photoelectron spectroscopy depth profile and Fe K-edge grazing-incidence X-ray absorption near-edge structure and extended X-ray absorption fine structure analysis demonstrated the formation of a similar to 50 nm overlayer with a gradient phosphorus distribution and structural evolution from the outer surface to the depth. The as-prepared photoanodes showed highly improved PEG water oxidation performance. Up to 8.5-fold enhancement in the photocurrent density at 1.23 V versus reversible hydrogen electrode was achieved relative to the pristine anode. This strategy is applicable for hematite photoanodes prepared by different methods and with different morphologies and structures. The improvement in the water oxidation activity is mainly attributed to the enhanced separation of photogenerated electron-hole pairs, which is derived from the increased hole diffusion length in the gradient-structured overlayer. This work develops a simple and universal method to boost the PEC water oxidation efficiency with versatile hematite photoanodes.
收录类别SCI
WOS记录号WOS:000340446300123
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被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224782
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
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Zhang, YC,Zhou, ZC,Chen, CC,et al. Gradient FeOx(PO4)(y) Layer on Hematite Photoanodes: Novel Structure for Efficient Light-Driven Water Oxidation[J]. ACS APPLIED MATERIALS & INTERFACES,2014,6(15):12844-12851.
APA Zhang, YC.,Zhou, ZC.,Chen, CC.,Che, YK.,Ji, HW.,...&宋冬燕.(2014).Gradient FeOx(PO4)(y) Layer on Hematite Photoanodes: Novel Structure for Efficient Light-Driven Water Oxidation.ACS APPLIED MATERIALS & INTERFACES,6(15),12844-12851.
MLA Zhang, YC,et al."Gradient FeOx(PO4)(y) Layer on Hematite Photoanodes: Novel Structure for Efficient Light-Driven Water Oxidation".ACS APPLIED MATERIALS & INTERFACES 6.15(2014):12844-12851.
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