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Steady-state formation rates of (a) hydrogen peroxides (i.e., sum of H2O2, HDO2, and D2O2), and (b) HD on 2 nm (red) and 25 nm (black) Au nanoparticles supported on TiO2 as functions of the combined pressure of H2 and D2 (10–200 kPa H2, 10–200 kPa D2, 60 kPa O2; equimolar H2 to D2) at 278 K. Dashed lines intended to guide the eyes.
