fig3

Figure 3. SEM images of ZSM-5 zeolites with varied Si/Al ratios of [A(i)] 12.4, [A(ii)] 22.0, [A(iii)] 50.3, and [A(iv)] 19.6; (B) Comparisons of the catalytic performances of various Fe/ZSM-5 samples. Reprinted with permission from ref^[84]. Copyright 2022. The Royal Society of Chemistry; (C) Proposed reaction pathway controlling the oxidation of methane into methanol and formic acid using H₂O₂ over the Fe/MOR catalyst. Reprinted with permission from ref^[78]. Copyright 2019. The Royal Society of Chemistry. Partial oxidation of methane over different metal-containing ZSM-5 catalysts. Reaction conditions: 50 mg catalyst, 31 bar CH₄, 0.277 M H₂O₂, liquid volume = 30 mL, reaction temperature = 30 °C (D), 50 °C (E). Reprinted with permission from ref^[86]. Copyright 2022. MDPI. SEM: Scanning electron microscopy.