Single Platinum Atom Catalysts with High Density

Qiao and co-workers recently designed and interpreted the construction of high-density Pt single atoms in the Co3 O4 host with inter-site interactions via the Hard-Soft Acid-Base principle and further revealed the dynamic structure evolution process of the single atom sites by a series of in situ/ex situ spectroscopic techniques and theoretical computation.As a new frontier, the rapid development of single-atom catalysts (SACs) in heterogeneous catalysis has attracted extensive attention. However, a fundamental understanding of the dynamic formation process of active metal atom sites is lacking. The rational design of high-performance SACs now becomes possible by explicitly addressing the conundrum of constructing high-density SACs and elucidating the evolution of SACs during the synthesis.