Abstract
We synthesized insoluble Prussian blue nanoparticles (PB NPs) and water-soluble PB NPs ([Fe(CN)6]4−-modified PB NPs) as synthetic fields and carriers of Pt subnano clusters. Pt2+ can attach on their surface Fe–CN sites. The amount of the attached Pt2+ on the insoluble and water-soluble PB NP surfaces was saturated to reach Pt/Fe = 15 and 40 mol%, respectively, based on the total metal ions of PB. The results showed that the attachment amount of Pt2+ on the surface CN sites was controlled by the surface modification. From results of TEM and STEM-HADDF-EDS, Pt subnano clusters (1.4 nm) were observed on water-soluble PB NPs after the reduction using hydrazine.
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