Fig. 3
Influence of partial pressure O2, CO and CH4 on catalytic performances. Yields of methanol (black), formic acid (blue), and acetic acid (red) in the chemical transformation of CH4 at 150 °C in aqueous solutions at different pressure of O2, CO, CH4. a 35 bar CH4, 10 bar CO, and different pressure of O2 at 150 °C for 2 h. b 50 bar CH4, 8 bar O2, and different pressure of CO at 150 °C for 1.5 h. c 10 bar CO, 8 bar O2 and different pressure of CH4 at 150 °C for 2 h
