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. 2021 Apr 9;13(19):22391–22415. doi: 10.1021/acsami.1c02934

Figure 6.

Figure 6

(A) Transient rates (μmol g–1 s–1) of 18O2 consumed during the step-gas switch Ar → 2 vol % 18O2/2 vol % Kr/Ar (15 min) performed at 500 °C on (a) Cu–Ce–O, (b) Co–Ce–O, (c) Mn–Ce–O, and (d) Zn–Ce–O doped ceria along with pristine CeO2 (e) solids. Transient rates (μmol g–1 s–1) of CO(g) consumed (B), C16O18O (C), and C16O2 (D) formed during the step-gas switch Ar → 4 vol % CO/2 vol % Kr/Ar (20 min) performed at 250 °C following oxygen exchange (A) over (a) Cu–Ce–O, (b) Co–Ce–O, (c) Mn–Ce–O, and (d) Zn–Ce–O doped-ceria solids, along with pristine CeO2 (e).