摘要
The envisioned exponential growth in the utilization of single-atom catalysts(SACs)has recently emerged as a frontier in the spectrum of material advancement.This is attributed to the distinctive properties of SACs,which encompass 100%atomic efficiency,superior selective performance,tunable coordination environment,and unique electronic structures(Wu et al.,2022b;Loy et al.,2023;Wang et al.,2023).The concept of single-atom isolation was initially introduced by Qiao et al.(2011),with the objective to explore the superior catalytic activity of Pt single-atom compared to Pt nanoparticles/nanoclusters in CO oxidation.Later,Zhou et al.(2019)in-novatively developed the biomass-derived CO-based SACs and introduced for the oxidative esterification of alcohols.Despite there are many good pieces of news on the SACs,the large-scale fabrication of SACs remains a formidable challenge,impeding their potential to drive scalable production of drop-in chemicals.The primary challenge lies in the cost-intensive process of reducing the size of embedded metal particles to sub-angstrom dimensions,a necessary step for creating well-dispersed atomic active sites.However,this complexity arises from the inherent behavior of individual atoms that are inclined to migrate and cluster into nanoparticles due to their high surface free energy(Chen et al.,2021).
