کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9582209 | 1505183 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tuning the photoelectrochemistry of nanoporous anatase electrodes by modification with gold nanoparticles: Development of cathodic photocurrents
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
In oxygen-saturated 0.05Â M NaOH, anatase nanoporous electrodes modified with gold nanoparticles show, under Xe arc-lamp illumination, cathodic photocurrents at EÂ <Â â0.35 VAg/AgCl in addition to the typical anodic photocurrents due to water photooxidation at higher potentials. These cathodic photocurrents are suppressed either in the absence of dissolved oxygen or in the presence of methanol, a hole acceptor. Their appearance also depends on the nature of the gold nanoparticle capping agent. Such a behavior is understood according to an enhanced electron transfer to solution via the gold nanoparticles and to simultaneous hole and electron diffusion through the anatase nanoporous network.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics Letters - Volume 414, Issues 4â6, 14 October 2005, Pages 489-494
Journal: Chemical Physics Letters - Volume 414, Issues 4â6, 14 October 2005, Pages 489-494
نویسندگان
Teresa Lana-Villarreal, Roberto Gómez,