Single‐atom catalysts (SACs) inherit the merit of both homogeneous and heterogeneous systems with atomically dispersed mononuclear metal centers on the solid supports. Herein, we developed an Ir‐SAC catalyst via the polymerization of an active homogeneous 2‐picolinylhydrazone ligand‐based iridium (Ir) metal complex. Such catalysts provide great stabilization against migration and agglomeration due to the strong covalent C‐C bond linkage of active complexes and the polymer matrix. This Ir‐SAC catalyst shows excellent selectivity towards glycerol to lactic acid conversion with a remarkable recyclability to offer an unprecedentedly high TON of over 104 million under optimized conditions.

中文翻译：

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提高铱单原子催化剂在多孔有机聚合物中将甘油转化为乳酸的性能


单原子催化剂 （SAC） 继承了均相和非均相体系的优点，其原子分散的单核金属中心位于固体载体上。在此，我们通过活性均相 2-吡啶酰腙配体基铱 （Ir） 金属络合物的聚合开发了一种 Ir-SAC 催化剂。由于活性复合物和聚合物基质具有很强的共价 C-C 键键，这种催化剂对迁移和团聚具有很强的稳定性。这种 Ir-SAC 催化剂对甘油到乳酸的转化表现出优异的选择性，具有卓越的可回收性，在优化条件下可提供超过 1.04 亿吨的空前高吨位。