Photohole Trapping Induced Platinum Cluster Nucleation on the Surface of TiO2 Nanoparticles

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• 作者：Jiwei Ma ; Edgar Valenzuela ; Aldo S. Gago ; Julie Rousseau ; Aurélien Habrioux ; Nicolas Alonso-Vante
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：January 16, 2014
• 年：2014
• 卷：118
• 期：2
• 页码：1111-1117
• 全文大小：432K
• ISSN：1932-7455

文摘

The photocurrent response of TiO₂ nanoparticles synthesized via the sol鈥揼el process was studied in the presence of methanol, ethanol, and isopropanol. The nanocrystalline nature of photoelectrodes showed an important photocurrent in the presence of alcohol following the order methanol 鈮? ethanol > isopropanol > H₂O. This process mimics the photoelectrochemical response, and therefore a correlation of the photodeposition process of platinum nanoclusters on TiO₂ particles in the presence of alcohol molecules was devised. The photodeposition mechanism of platinum nanoislands at the surface of a nanocrystalline TiO₂ powder is discussed in the light of the photoelectrochemical results.