Kamiya Kazuhide
Research Center for Solar Energy Chemistry, Osaka University 1-3 Machikaneyama Toyonaka Osaka 560-8531 Japan
Graduate School of Engineering Science, Osaka University 1-3 Machikaneyama Toyonaka Osaka 560-8531 Japan.
Chem Sci. 2020 Jul 20;11(32):8339-8349. doi: 10.1039/d0sc03328f.
Single-atom electrocatalysts (SACs), which comprise singly isolated metal sites supported on heterogeneous substrates, have attracted considerable recent attention as next-generation electrocatalysts for various key reactions from the viewpoint of the environment and energy. Not only electrocatalytic activity but also selectivity can be precisely tuned the construction of SACs with a defined coordination structure, such as homogeneous organometallics. Covalent organic frameworks (COFs) are promising supports for single-atom sites with designed coordination environments due to their unique physicochemical properties, which include porous structures, robustness, a wide range of possible designs, and abundant heteroatoms to coordinate single-metal sites. The rigid frameworks of COFs can hold unstable single-metal atoms, such as coordinatively unsaturated sites or easily aggregated Pt-group metals, which exhibit unique electrocatalytic selectivity. This minireview summarizes recent advances in the selective reactions catalysed by SACs, mainly those supported on triazine-based COFs.
单原子电催化剂（SACs）由负载在异质基底上的单个孤立金属位点组成，从环境和能源的角度来看，作为用于各种关键反应的下一代电催化剂，最近受到了相当大的关注。通过构建具有明确配位结构的SACs，如均相有机金属化合物，不仅可以精确调节电催化活性，还可以调节选择性。共价有机框架（COFs）由于其独特的物理化学性质，包括多孔结构、稳定性、广泛的可能设计以及丰富的杂原子来配位单金属位点，是具有设计配位环境的单原子位点的有前途的载体。COFs的刚性框架可以容纳不稳定的单金属原子，如配位不饱和位点或容易聚集的铂族金属，这些原子表现出独特的电催化选择性。本综述总结了SACs催化的选择性反应的最新进展，主要是负载在基于三嗪的COFs上的那些反应。
