Gradient FeOx(PO4)(y) Layer on Hematite Photoanodes: Novel Structure for Efficient Light-Driven Water Oxidation
文献类型：期刊论文
| 作者 | Zhang, Yuchao1; Zhou, Zichao1; Chen, Chuncheng1; Che, Yanke1; Ji, Hongwei1; Ma, Wanhong1; Zhang, Jing2; Song, Dongyan2; Zhao, Jincai1 |
| 刊名 | ACS APPLIED MATERIALS & INTERFACES
 |
| 出版日期 | 2014-08-13 |
| 卷号 | 6期号:15页码:12844-12851 |
| 关键词 | Hematite Gradient Feox(Po4)(y) Water Oxidation Hole Diffusion Length |
| ISSN号 | 1944-8244 |
| DOI | 10.1021/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. |
| 语种 | 英语 |
| WOS记录号 | WOS:000340446300123 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/50487]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Chen, Chuncheng |
| 作者单位 | 1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Key Lab Photochem, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst High Energy Phys, BSRF, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yuchao,Zhou, Zichao,Chen, Chuncheng,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, Yuchao.,Zhou, Zichao.,Chen, Chuncheng.,Che, Yanke.,Ji, Hongwei.,...&Zhao, Jincai.(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, Yuchao,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. |
入库方式： OAI收割
来源：化学研究所
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