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Cobalt Single Atoms Embedded in Nitrogen‐Doped Graphene for Selective Oxidation of Benzyl Alcohol by Activated Peroxymonosulfate
Author(s) -
Li Jiaquan,
Zhao Shiyong,
Zhang Lianji,
Jiang San Ping,
Yang ShiZe,
Wang Shaobin,
Sun Hongqi,
Johannessen Bernt,
Liu Shaomin
Publication year - 2021
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202004579
Subject(s) - benzyl alcohol , catalysis , benzaldehyde , cobalt , adsorption , graphene , chemistry , selectivity , activated carbon , alcohol oxidation , photochemistry , electron transfer , inorganic chemistry , materials science , organic chemistry , nanotechnology
The development of novel single atom catalyst (SAC) is highly desirable in organic synthesis to achieve the maximized atomic efficiency. Here, a Co‐based SAC on nitrogen‐doped graphene (SACo@NG) with high Co content of 4.1 wt% is reported. Various characterization results suggest that the monodispersed Co atoms are coordinated with N atoms to form robust and highly effective catalytic centers to activate peroxymonosulfate (PMS) for organic selective oxidation. The catalytic performance of the SACo@NG/PMS system is conducted on the selective oxidation of benzyl alcohol (BzOH) showing high efficiency with over 90% conversion and benzaldehyde selectivity within 180 min under mild conditions. Both radical and non‐radical processes occurred in the selective oxidation of BzOH, but the non‐radical oxidation plays the dominant role which is accomplished by the adsorption of BzOH/PMS on the surface of SACo@NG and the subsequent electron transfer through the carbon matrix. This work provides new insights to the preparation of efficient transition metal‐based single atom catalysts and their potential applications in PMS mediated selective oxidation of alcohols.