Fig. 5: Roles of metallic states in heterogeneous catalysis.
From: Electronic communications between active sites on individual metallic nanoparticles in catalysis
a Reported Ea values in CO oxidation over supported metal particle catalysts with different particle sizes. Gold pentagrams represent the catalysts prepared in this paper. Reation condition for the catalysts in this paper: 100 mg catalyst (40 ~ 60 mesh) was used; the total flow rate was 50 mL min−1, including 1.0 vol% CO, 21.0 vol% O2 and N2 as balance gas. The red hollow circles represent data from the literature. Typically, the black hollow triangles represent the Ea values in CO oxidation over single-atom catalysts with reducible supports. All the data for the reported catalysts and the related reaction conditions were in detail listed in Supplementary Table 4. b Schematic illustration of the energy level between HOMO (or LUMO) of adsorbed CO and O2 molecules (*CO and *O2) and LUBO (or HOBO) of nonmetallic particles or metallic particles.
