Understanding the synergistic mechanism of single atom Co-modified perovskite oxide for piezo-photocatalytic CO2 reduction

Recent developments in piezo-photocatalytic CO2 reduction: concepts, mechanism, and advances

“…3(c) shows amplitude-voltage and phase-voltage curves. 25 Both showcase a 2.5 V shift towards the negative voltage values, demonstrating the presence of an internal electric field. Kelvin probe force microscopy (KPFM) surface potential is shown in another figure under dark and light conditions.…”

“…The bottom line in the piezo-photocatalytic phenomenon is that when mechanical stress is applied to a material, it creates a displacement current that can participate in reduction reactions. Xu et al 25 selected BiFeO 3 (BFO) material since it has astonishing piezoelectric properties and a cubic crystal structure. Under stressed conditions, Fe 4+ ions on the z -axis shift, which changes its dipole moment, producing polarization and a huge number of charge carriers on the catalyst surface.…”

“…Herein, there is a fundamental difference between the above-discussed research works. Xu's 25 work demonstrated that the enhancement in CO 2 piezo-photoreduction was achieved by harnessing the charges produced by BiFeO 3 with Co–N–C single atoms without making any alterations to the actual piezoelectric material. However, Wang 26 modified the NaNbO 3 crystal structure to allow it to create a higher quantity of piezo charges than usual.…”

Advancements and opportunities in piezo-(photo)catalytic synthesis of value-added chemicals

“…8h). 149 In the piezo-photocatalytic reaction process, an internal electric field promotes the transfer of electrons to the active sites of Co–N–C. The presence of electrons promotes the two-electron carbon dioxide reduction process.…”