Fig. 4: Catalytic performance of photo-thermo catalysis over Pd/TiO2-600H, Pd/Al2O3 and XPS characterization.
From: Photo-thermo semi-hydrogenation of acetylene on Pd1/TiO2 single-atom catalyst
a–c Acetylene conversion over the catalyst of 0.15 wt% Pd/TiO2-600H at 70 °C in the dark and 60 °C upon a full-spectrum light irradiation, power density: 167 mW cm−2, b visible light (λ > 420 nm), power density: 141 mW cm−2 and c λ > 480 nm, power density: 127 mW cm−2. Reaction conditions: 1 vol% C2H2, 10 vol% H2, 20 vol% C2H4 balanced with He; WHSV = 180,000 mL h−1 gcat−1. d Acetylene conversion over the catalyst of 0.036 wt% Pd/Al2O3 at 70 °C in the dark and 60 °C upon full-spectrum light irradiation with the similar reaction conditions. e Arrhenius plots for acetylene hydrogenation over the Pd/TiO2-600H upon light irradiation or in the dark under the gas mixture of 1 vol% C2H2, 20 vol%H2, 20 vol% C2H4 balanced with He. f Pd 3d XPS spectra of Pd/TiO2-200H after light irradiation by Xe lamp as well as the catalyst in dark.
