As most hydrogen is currently produced by natural gas reforming, the CO impurities in it can poison the catalyst surface even at low concentrations (10 ppm), which will significantly limit hydrogen oxidation reaction performance development. We focus on designing cheap, efficient, CO tolerance and stable hydrogen oxidation reaction  catalysts . As most hydrogen is currently produced by natural gas reforming, the CO impurities in it can poison the catalyst surface even at low concentrations (10 ppm), which will significantly limit hydrogen oxidation reaction performance development. We focus on designing cheap, efficient, CO tolerance and stable hydrogen oxidation reaction  catalysts .