Fig. 3: Hydrogen activation over Ru/TiO2. | Nature Communications

Fig. 3: Hydrogen activation over Ru/TiO2.

From: Electronic modulation of metal-support interactions improves polypropylene hydrogenolysis over ruthenium catalysts

Fig. 3

a Hydrogen spillover schematic over Ru/TiO2. b H2 binding on the metal-support interface. c Theoretical IR spectra for free electrons in the TiO2 conduction band and Ti3+ shallow trapped electrons. d, e Transmission FTIR transient spectra when switching from pure He to H2/He flow at 200 °C on Ru/TiO2−1 and Ru/TiO2−8, respectively. f Steady-state FTIR spectra for both samples at 250 °C and 0.14 bar H2. g, h In situ Raman spectra for Ru/TiO2-1 and Ru/TiO2-8 at 200 °C in He and H2/He flows, respectively (lines show Lorentzian curve fitting). i–k NAP-XPS of Ru/TiO2 samples under high vacuum and 1 mbar H2 pressure at 200 °C in T 2p (i), O 1 s (j), and Ru 3d (k) regions.

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