fig7

Figure 7. (A) Schematic illustration of the proposed reaction mechanism for CH₄ conversion into ethylene glycol; (B) EPR spectra of the catalyst suspension with DMPO as the spin probe; (C) The selectivity of CH₄ conversion into ethylene glycol. Reproduced with permission from Ref^[51]. Copyright 2021, Wiley-VCH; (D) Schematic illustration of water radiocatalysis for aqueous-phase CH₄ carboxylation with CO₂ to CH₃COOH at RT under γ-ray radiation; (E) EPR spectra of 0.1 MPa Ar 100 mL H₂O + 150 μL DMPO (black), 0.1 MPa CH₄ + 100 mL H₂O + 150 μL DMPO (red), 0.1 MPa CO₂ + 100 mL H₂O + 150 μL DMPO (blue) and 0.1 MPa CH₄ and CO₂ mixture (CH₄:CO₂ = 5:1) + 100 mL H₂O + 150 μL DMPO (green) after γ-ray irradiation for 2 h at 298 K; (F) Conversion rates of CH₄ and CO₂ and product selectivity calculated from CH₄ and CO₂ radiated for 6 h at RT under 0.1 MPa 40 mL of CH₄ and CO₂ mixtures with different CH₄:CO₂ ratios and 100 mL of H₂O. Reproduced with permission from Ref^[54]. Copyright 2024, American Chemical Society. EPR: Electron paramagnetic resonance; DMPO: 5,5-dimethyl-1-pyrroline N-oxide; RT: room temperature.