Figure 4.

Mechanism of triboelectric plasma‐driven CO₂ reduction. a) Diagrams of four plausible dissociation pathways of CO₂ decomposition in the plasma. b) Optical emission spectra of the triboelectric plasma with discharge distances of 0.2 and 0.8 mm. c) Average electron energy (E _e) and electron density (n _e) of mid perpendicular at an evolution time of 6.0 ns and a discharge distance of 0.8 mm. d) Schematic illustration of the vibrational excitation dissociation pathway. Note that CO_2(v) and CO_2(v*) stand for different vibrationally excited levels, being CO_2(v*) at a higher level than CO_2(v).