The oxidations of CO and C₃H₆ are important model reactions for environmental cleanup reactions such as the purification of automotive exhaust gases from diesel engine or of volatile organic compounds. Mn-modified hexagonal YbFeO₃ (Mn-h-YbFeO₃), synthesized by a solvothermal method, exhibits excellent catalytic activities for these oxidations despite the absence of platinum-group metal (PGM) loading. The activity of Mn-h-YbFeO₃ itself is dramatically enhanced by the addition of a small amount of Pd or Ru; these species supported on the Mn-h-YbFeO₃ act as promoters that improve the CO- or C₃H₆- adsorption/desorption ability and the oxygen release property from the Mn-h-YbFeO₃. PGM/Mn-h-YbFeO₃ catalysts show much higher catalytic activities than Al₂O₃-supported PGM catalysts in which Al₂O₃ support is inert for these reactions. We expect that the establishment of such promoter effects for catalyst support having high catalytic activity will provide novel guidelines for reducing the use of precious-metal resources.

CO和C ₃ H ₆的氧化是环境净化反应的重要模型反应，例如净化柴油发动机的汽车废气或挥发性有机化合物。尽管没有铂族金属（PGM）的负载，但通过溶剂热法合成的Mn改性六角形YbFeO ₃（Mn- h -YbFeO ₃）表现出出色的催化活性。Mn- h - YbFeO ₃本身的活性通过添加少量的Pd或Ru而显着提高。这些负载在Mn- h -YbFeO ₃上的物质可作为促进CO-或C _3的促进剂H _6的吸附/解吸能力和Mn- h -YbFeO ₃的氧释放性能。PGM / Mn- h - YbFeO ₃催化剂显示出比Al ₂ O ₃负载的PGM催化剂高的催化活性，其中Al ₂ O ₃载体对于这些反应是惰性的。我们期望建立具有高催化活性的催化剂载体的这种促进作用将为减少贵金属资源的使用提供新的指导方针。