Fig. 5 | Nature Communications

Fig. 5

From: Colloidal zinc oxide-copper(I) oxide nanocatalysts for selective aqueous photocatalytic carbon dioxide conversion into methane

Fig. 5

Stability experiment of the ZnO-Cu2O catalysts. a Amount of CH4 production using the ZnO-Cu2O catalysts as a function of the irradiation time up to 14 h. The reaction conditions were pH = 7.4 and λ > 200 nm. The CH4 amount was converted based on the catalyst amount fixed to 19 mg. b The amount of CH4 production under the identical reaction conditions except the change of the reaction medium at each 4 h reaction time

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