Department of Chemistry, School of Science , The University of Tokyo , Hongo, Bunkyo-ku, Tokyo 113-0033 , Japan.
Org Lett. 2018 Sep 7;20(17):5172-5176. doi: 10.1021/acs.orglett.8b02118. Epub 2018 Aug 24.
Heterogeneous nitrogen-doped carbon-incarcerated cobalt/copper bimetallic nanoparticle (NP) catalysts, prepared from nitrogen-containing polymers, were developed, and an efficient catalytic process for aerobic oxidative esterification was achieved in the presence of a low loading (1 mol %) of catalyst that could be reused and easily reactivated. This protocol enabled diverse conditions for the bimetallic NP formation step to be screened, and significant rate acceleration by inclusion of a copper dopant was discovered. The catalytic activity of the bimetallic Co/Cu catalysts is much higher than that for cobalt catalysts reported to date and is even comparable with noble-metal NP catalysts.
开发了一种由含氮聚合物制备的异质氮掺杂碳嵌入钴/铜双金属纳米粒子（NP）催化剂，在低负载量（1mol%）的催化剂存在下，实现了有氧氧化酯化的高效催化过程，该催化剂可重复使用且易于再活化。该方案可以筛选出双金属 NP 形成步骤的多种条件，并发现加入铜掺杂剂可以显著提高反应速率。双金属 Co/Cu 催化剂的催化活性远高于迄今为止报道的钴催化剂，甚至可与贵金属 NP 催化剂相媲美。
