The creation of green heterogeneous nanocatalysts with chemical modifications to convert CO2 into value-added products has many supporters. Here, we report a green and cost-effective CO2 reduction method for the synthesis of formate salts in the participation of nanosized polyoxomolybdate caprate [Mo368] supported by cellulose interdendritic fibrous nanosilica (DFNS). To generate the nanocatalyst as a substrate to support [Mo368], cellulose wasutilized to control the metal leaching during the reaction. The products were conveniently isolated from the catalyst, and the green medium was deployed several times without a notable decrease in selectivity and function. The results of Raman spectral data, UV–vis, FT-IR, FESEM, TEM, XRD, and TGA confirmed that Mo (VI) peroxo complex collaborated in hydrogenation of CO2. To prepare the catalyst, the surface of DFNS was activated with cellulose to act as a substrate to support [Mo368] nanoparticles. The anatomy of the final complex changed the catalytic properties of the cellulose catalyst for the production of the final product.

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