The present disclosure belongs to the field of catalysts, and in particular relates to a carbon monoxide catalyst and a preparation method therefor and use thereof. The carbon monoxide catalyst includes a support and metal catalytic particles; or metal catalytic particles and metal oxide catalytic particles supported in the support; metals in the metal catalytic particles or the metal oxide catalytic particles include a noble metal, titanium, cerium, cobalt, nickel and molybdenum. The carbon monoxide catalyst provided in the example of the present disclosure can also be used for the catalysis of other combustible gases such as methane, ethanol, hydrogen, and low volatile organic compounds.

A catalyst includes a MgFeO.sub.x support, wherein x is a number of oxygen atoms present; ruthenium in contact with at least a portion of the MgFeO.sub.x support; and an additive including at least one of cobalt and molybdenum, where a weight ratio of the ruthenium to the additive ranges from about 1:5 to about 5:1.