Boosting Photocatalytic Hydrogen Production of a Metal-Organic Framework Decorated with Platinum Nanoparticles: The Platinum Location Matters

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• 作者：Juan-Ding Xiao ; Qichao Shang ; Prof. Dr. Yujie Xiong ; Prof. Dr. Qun Zhang ; Prof. Dr. Yi Luo ; Prof. Dr. Shu-Hong Yu and Prof. Dr. Hai-Long Jiang
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：August 1, 2016
• 年：2016
• 卷：55
• 期：32
• 页码：9389-9393
• 全文大小：1735K
• ISSN：1521-3773

文摘

Improving the efficiency of electron–hole separation and charge-carrier utilization plays a central role in photocatalysis. Herein, Pt nanoparticles of ca. 3 nm are incorporated inside or supported on a representative metal–organic framework (MOF), UiO-66-NH₂, denoted as Pt@UiO-66-NH₂ and Pt/UiO-66-NH₂, respectively, for photocatalytic hydrogen production via water splitting. Compared with the pristine MOF, both Pt-decorated MOF nanocomposites exhibit significantly improved yet distinctly different hydrogen-production activities, highlighting that the photocatalytic efficiency strongly correlates with the Pt location relative to the MOF. The Pt@UiO-66-NH₂ greatly shortens the electron-transport distance, which favors the electron–hole separation and thereby yields much higher efficiency than Pt/UiO-66-NH₂. The involved mechanism has been further unveiled by means of ultrafast transient absorption and photoluminescence spectroscopy.