Visible-Light-Driven Photocatalytic Suzuki鈥揗iyaura Coupling Reaction on Mott鈥揝chottky-type Pd/SiC Catalyst

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• 作者：Zhifeng Jiao ; Zhaoyang Zhai ; Xiaoning Guo ; Xiang-Yun Guo
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：February 12, 2015
• 年：2015
• 卷：119
• 期：6
• 页码：3238-3243
• 全文大小：427K
• ISSN：1932-7455

文摘

The Mott鈥揝chottky heterojunction in Pd/SiC can continuously transfer photogenerated electrons to Pd nanoparticles and leave holes in SiC under irradiation. The electrons in Pd particles and holes in SiC played different roles in the photocatalytic Suzuki鈥揗iyaura coupling reaction, respectively, for cleaving the C鈥揃r or C鈥揑 bond in benzene halides and the C鈥揃 bond in phenylboronic acids. Therefore, the intrinsic activity of Pd was dramatically enhanced when employing SiC-supported Pd nanoparticles as the photocatalyst for the coupling reaction. The Mott鈥揝chottky-type Pd/SiC catalyst in the coupling of iodobenezene and phenylboronic acid showed a high turnover frequency of 1053 h^鈥? and a selectivity of nearly 100% under visible-light irradiation at 30 掳C. This provides a green photocatalytic route for synthesizing biaryl compounds and a facile strategy for designing novel photocatalysts for a wide range of organic transformations driven by visible light.