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. 2024 Feb 6;15:1109. doi: 10.1038/s41467-024-45389-7

Fig. 2. Photo-thermal-catalytic performance.

Fig. 2

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.