Fig. 3.
Structure and model for the atomically dispersive process of Rh NPs. a Coordination number variation of Rh–Rh, Rh–I, and Rh–CO during atomically dispersion process derived from EXAFS result (Supplementary Table 4) of Rh/AC treated with CO/CH3I at 513 K for different time. b The representative mass spectra of different reactant and radical species detected during the in-situ reaction between Rh/AC and CO/CH3I at 513 K by LDI/TOF-MS. The inset is the variation of iodine radicals (I•) signals during the reaction between Rh/AC and CO/CH3I at different temperature. c The atomic dispersion model of Rh NPs via one-by-one mechanism based on the 16–18 effective atomic number (EAN) rule