Fig. 2
From: Bottom-up precise synthesis of stable platinum dimers on graphene
Morphology of the single-atom Pt1/graphene and dimeric Pt2/graphene catalysts. Aberration-corrected HAADF-STEM images of Pt1/graphene (a–c) and dimeric Pt2/graphene (d, e). Scale bars, 20 nm (a, d), 2 nm (b, e), and 1 nm (c, f). Pt single atoms in b and c and dimers in e and f are highlighted by white and yellow circles, respectively. g Statistical Pt–Pt distance in the observed Pt2 dimers. h The ratio of Pt loading of in Pt-MeCpPtMe/graphene to that in MeCpPtMe/graphene, and i the ratio of Pt loading in Pt2/graphene to that in Pt1/graphene in nine independent trials determined by ICP-AES
