Hot-Electron-Induced Dissociation of H2 on Gold Nanoparticles Supported on SiO2

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• 作者：Shaunak Mukherjee ; Linan Zhou ; Amanda M. Goodman ; Nicolas Large ; Ciceron Ayala-Orozco ; Yu Zhang ; Peter Nordlander ; Naomi J. Halas
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：January 8, 2014
• 年：2014
• 卷：136
• 期：1
• 页码：64-67
• 全文大小：299K
• ISSN：1520-5126

文摘

Hot-electron-induced photodissociation of H₂ was demonstrated on small Au nanoparticles (AuNPs) supported on SiO₂. The rate of dissociation of H₂ was found to be almost 2 orders of magnitude higher than that observed on equivalently prepared AuNPs on TiO₂. The rate of H₂ dissociation was found to be linearly dependent on illumination intensity with a wavelength dependence resembling the absorption spectrum of the plasmon of the AuNPs. This result provides strong additional support for the hot-electron-induced mechanism for H₂ dissociation in this photocatalytic system.