The activity of the experimentally synthesized Fe-N-C catalyst samples was tested for the catalytic oxidation of formaldehyde. For 50 mg catalyst, the initial concentration of formaldehyde was 60 ppm with a total gas flow rate of 150 mL/min. To achieve the goal of complete catalysis of formaldehyde, a gas hourly space velocity (GHSV) of 73,000 h -1 was used in this experimental design. To test the catalytic efficiency of formaldehyde at different temperatures, the reaction temperature range was set at 25 to 170°C, with temperature intervals of 20°C. Considering that removing formaldehyde at room temperature is our goal, the sample was first tested at 25°C