Fig. 2: Photo-thermal-catalytic performance.
From: Photo-thermal coupling to enhance CO2 hydrogenation toward CH4 over Ru/MnO/Mn3O4
a Influence of the Ru content on CH4 evolution rate over Ru/MnOx; b Influence of CO2/H2 volume ratio in the feedstock on CH4 evolution rate over Ru/MnOx; c Temperature-dependent CH4 generation rate over Ru/MnOx under photo-thermal and thermal conditions; d Influence of light intensity on CH4 evolution rate over Ru/MnOx; e Corresponding Arrhenius plot with activation energies noted under photo-thermal/thermal conditions over the Ru/MnOx catalysts. f CH4 evolution as a function of reaction time over Ru/MnOx. Reaction conditions: 15 mg of catalyst, full-arc 300 W UV-xenon lamp, 2.5 W cm−2, 200 °C, irradiation time 4 h, initial pressure 1 MPa (H2/CO2 = 1/1) for Fig. 2a or initial pressure 1 MPa (H2/CO2 = 4/1) for Fig. 2c–f.
