Improvement of Photoelectrochemical Properties by Surface Modification with Iron Oxide on p-Type Si Electrodes for Hydrogen Evolution from Water
| Autor: | Jun Kubota, Tsutomu Minegishi, Xuwang Lu, Kazunari Domen |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Photocurrent
Materials science Silicon Physics and Astronomy (miscellaneous) Inorganic chemistry Iron oxide General Engineering chemistry.chemical_element General Physics and Astronomy Cathodic protection chemistry.chemical_compound chemistry Electrode Surface modification Reversible hydrogen electrode Platinum |
| Zdroj: | Japanese Journal of Applied Physics. 50:085702 |
| ISSN: | 1347-4065 0021-4922 |
| DOI: | 10.7567/jjap.50.085702 |
| Popis: | Surface modifications using platinum (Pt) particles and iron oxides (FeO x ) were found to lead to a significant improvement in the current–potential (J–E) properties for hydrogen evolution from water in p-type silicon (p-Si) electrodes. The onset potential and cathodic photocurrent for hydrogen evolution from the Pt/p-Si(100) electrode were, respectively, 0.50 VRHE and 0.28 mA/cm2 at 0 VRHE (RHE: reversible hydrogen electrode). When the p-Si(100) electrode was coated with iron oxide followed by Pt particles [Pt/FeO x /p-Si(100)], it showed an onset potential and photocurrent of 0.85 VRHE and 2.45 mA/cm2 at 0 VRHE, respectively. A detailed study of surface morphology and a comparative study between (100) plane and (111) plane p-Si electrodes revealed that the dramatic improvement in J–E properties was the result of a change in the surface structure and tailing of FeO x in p-Si. |
| Databáze: | OpenAIRE |
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