基于限阈空间制备 Mn 单原子催化剂及其电催化析氧性能

A simple strategy was adopted to prepare single-atom catalysts (SACs) using mesoporous silica KIT-6 (TOK) without templating agent removal as a carrier and utilizing the confined space between the templating agent and the silica wall. After the Mn-containing precursor was introduced into the confined space of TOK by solid-phase milling, Mn SACs can be rapidly generated during the calcination. Density functional theory calculations and experimental data indicate that the Mn atoms are anchored by Si—OH groups on the carriers and exist as Mn—O—Si. The obtained Mn SACs were applied to the electrocatalytic oxygen evolution reaction, and the experimental results show that the Mn SACs exhibit better catalytic performance than the comparison samples synthesized in a carrier without confined space.