Carbon monoxide catalysts belong to the noble metal series catalysts. These catalysts can catalyze CO gas at room temperature and atmospheric pressure, enabling CO to combine with O? in the air to form CO?. Their advantage lies in stable performance, maintaining catalytic stability even in high humidity environments (RH > 85%), and exhibiting good catalytic effects on low-concentration CO gas. Compared to traditional hydrophobic CO catalysts, this noble metal catalyst demonstrates significant performance and application advantages.