期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 54, 期 46, 页码 13753-13757出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201506963
关键词
electrochemistry; nanoparticles; photoelectrochemistry; surface passivation; tunneling
资金
- NSF CCI Solar Fuels grant [CHE-1305124]
- National Science Foundation [CHE-1405248]
Single-nanoparticle collisions were observed on an n-type silicon electrode (600 mu m diameter) passivated by a thin layer of amorphous TiO2, where the current steps occurred by tunneling electron transfer. The observed collision frequency was in reasonable agreement with that predicted from theory. The isolated electrode, after a collision experiment, with a Pt/TiO2/n-Si architecture was shown to retain the photoelectrochemical properties of n-Si without photocorrosion or current decay. The Pt/TiO2/n-Si electrode produced 19 mA cm(-2) of photocurrent density under 100 mW cm(-2) irradiation from a xenon lamp during oxygen evolution without current fading for over 12 h.
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