“…Additionally, a larger peak at 398.6 eV is observed, which is because of the formation of Pt–N bonds (Figure S15c, Table S1). ,,, As shown in Figure a, commercial Pt/C exhibits Pt 4f 7/2 and Pt 4f 5/2 peaks at 71.2 and 74.5 eV, suggesting that Pt mainly exists in the form of Pt 0 . Notably, the Pt 4f peak in Pt 1 /NNGF exhibits stronger peaks for Pt 2+ and new peaks for Pt 4+ . ,, To further probe the electronic structure and coordination environment of Pt 1 at the atomic level, we carried out X-ray absorption of fine structure (XAFS) measurement.…”