题名：Selective Hydrodeoxygenation of Aromatics to Cyclohexanols over Ru Single Atoms Supported on CeO₂

来源：Journal of the American Chemical Society

发表年代：2022年

作者：Kaili Zhang, Qinglei Meng,* Haihong Wu,* Jiang Yan, Xuelei Mei, Pengfei An, Lirong Zheng, Jing Zhang, Mingyuan He, and Buxing Han*

Abstract : Cyclohexanols are widely used chemicals, which aremainly produced by oxidation of fossil feedstocks. Selectivehydrodeoxygenation of lignin derivatives has great potential forproducing these chemicals but is challenging to obtain high yields.Here, we report that CeO₂-supported Ru single-atom catalysts(SACs) enabled the hydrogenation of the benzene ring andcatalyzed etheric C−O(R) bond cleavage without changing the C−O(H) bond, which could afford 99.9% yields of cyclohexanols. Asfar as we know, this is the first to report that SACs catalyzehydrogenation of the aromatic ring. The reaction mechanism wasstudied by control experiments and density functional theorycalculations. In the catalysts, the Ru−O−Ce sites were formed andone Ru atom was coordinated with about four O atoms. Thesecatalytic sites could realize both the hydrogenation and deoxygenation reactions efficiently, and thus desired cyclohexanols weregenerated. This work pioneers the single-atom catalysis in aromatic transformation and provides a novel route for synthesis ofcyclohexanols