A Facile Surface Passivation of Hematite Photoanodes with Iron Titanate Cocatalyst for Enhanced Water Splitting | |
Wang, Lei1,2; Nhat Truong Nguyen1; Patrik Schmuki1,3 | |
刊名 | ChemSusChem |
2016 | |
卷号 | 9期号:16页码:2048-2053 |
关键词 | hematite iron titanate passivation layer tin oxides water splitting |
ISSN号 | 1864-5631 |
通讯作者 | Patrik Schmuki |
英文摘要 | The surface modification of semiconductor photoelectrodes with passivation overlayers has attracted great attention as an effective strategy to improve the charge separation and charge transfer processes across the semiconductor-electrolyte interface. In this work, a thin Fe2TiO5 layer was decorated on nanostructured hematite nanoflake and nanocoral photoanodes (by thermal oxidation of iron foils) by a facile water-based solution method. Photoelectrochemical measurements show that the Fe2O3/Fe2TiO5 heterostructure exhibits an obvious enhancement in photoelectrochemical water oxidation performance compared to the pristine hematite. For example, at 1.23 V versus the reversible hydrogen electrode (VRHE) in 1 m KOH under AM 1.5 G (100 mW cm−2) illumination, a 4–8× increase in the water oxidation photocurrent is achieved for Fe2O3/Fe2TiO5, and a considerable cathodic shift of the onset potential up to 0.53–0.62 VRHE is obtained. Moreover, the performance of the Fe2O3/Fe2TiO5 heterostructure can be further improved by decoration with a SnOx layer. The enhancement in photocurrent can be attributed to the synergistic effect of Fe2TiO5/SnOx overlayers passivating surface states, and thus reducing surface electron–hole recombination. |
学科主题 | 物理化学与绿色催化 |
收录类别 | SCI |
资助信息 | SPP1613;DFG |
语种 | 英语 |
WOS记录号 | WOS:000383267600004 |
内容类型 | 期刊论文 |
源URL | [http://210.77.64.217/handle/362003/20468] |
专题 | 兰州化学物理研究所_OSSO国家重点实验室 兰州化学物理研究所_ERC国家工程研究中心 |
作者单位 | 1.Univ Erlangen Nuremburg, Dept Mat Sci & Engn, LKO WW4, Martensstr 7, D-91058 Erlangen, Germany 2.Chinese Acad Sci, State Key Lab Oxo Synth & Select Oxidat, Natl Engn Res Ctr Fine Petrochem Intermediates, Lanzhou Inst Chem Phys, Lanzhou 730000, Gansu, Peoples R China 3.King Abdulaziz Univ, Dept Chem, Jeddah, Saudi Arabia |
推荐引用方式 GB/T 7714 | Wang, Lei,Nhat Truong Nguyen,Patrik Schmuki. A Facile Surface Passivation of Hematite Photoanodes with Iron Titanate Cocatalyst for Enhanced Water Splitting[J]. ChemSusChem,2016,9(16):2048-2053. |
APA | Wang, Lei,Nhat Truong Nguyen,&Patrik Schmuki.(2016).A Facile Surface Passivation of Hematite Photoanodes with Iron Titanate Cocatalyst for Enhanced Water Splitting.ChemSusChem,9(16),2048-2053. |
MLA | Wang, Lei,et al."A Facile Surface Passivation of Hematite Photoanodes with Iron Titanate Cocatalyst for Enhanced Water Splitting".ChemSusChem 9.16(2016):2048-2053. |
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