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. 2020 Aug 24;142(37):15884–15896. doi: 10.1021/jacs.0c06270

Figure 3.

Figure 3

(a) Phase-uncorrected k2-weighted FT-EXAFS curves during exposure of the Cu-CHA catalyst to NO/NH3/He (dark blue thick line), followed by 10% O2 in He (gray thin lines; red thick line: final spectrum; dark gray dashed line: pretreatment in O2 by heating in O2 up to 400 °C and subsequently cooling in O2 down to 200 °C prior to XAS data collection, step 1. (b) Illustration of [Cu(NH3)2]+ and (c) μ-η2,η2-peroxo diamino dicopper(II) (side-on) complexes. Atom color code: Cu, green; H, white; O, red; N, blue. Part (c) also report selected DFT bond distances in Å.