Photo-Electrochemical Reduction of CO2 to Methanol on Quaternary Chalcogenide Loaded Graphene-TiO2 Ternary Nanocomposite Fabricated via Pechini Method (original) (raw)

2022, Journal of Inorganic and Organometallic Polymers and Materials

Nano-sized catalysts have been widely studied for CO 2 reduction to hydrocarbon fuels. Herein, we study the new-modeled ternary nanocomposite that can use in photocatalytic and electrochemical CO 2 reduction. In order to adjust the energy of the catalyst band and the characteristics of the effective charge carrier, we rstly synthesized the AgFeNi 2 S 4 quaternary nanocomposite and then used it to model the ternary nanocomposites, and all the nanocomposites were synthesized using the Pechini method. The activity of the nanocomposites is directly related to the output of methanol productions. In a photocatalytic CO 2 reduction experiment, the methanol yield under UV radiation was 8.679, 6.349, 4.136%, and under Vis-light it was 6.291, 4.738, and 2.339%, respectively. The stability and reusability of the catalysts are the main factors that can de ne the sturdiness of a photocatalyst in practical applications. The sturdiness of the catalyst has been tested four times by recycling tests, and as a result, the yield of the nal product (methanol) has not decreased, con rming the stability of the catalyst. In electrochemical CO 2 reduction, the Faraday e ciency is the main parameter that de nes the performance of the working electrode and the evolution of methanol. The Faraday e ciency of the AFNSGT ternary nanocomposite was 44.25%; this is an increase in the value of the Faraday e ciency, which proves that the design of the new nanocomposite successfully increases the activity of the working electrode and has a positive effect on the electrochemical reduction of CO 2. The photocatalytic and electrochemical CO 2 reduction data show that the preparation method, morphological state, and charge carrier properties of the photocatalyst are important for the catalytic activity and e ciency of the methanol evolution pathway.