The equivalent ESR amplitude in relation to different amount of coke formation is observed, on three catalysts, it means that the different reactant species from three catalysts make different contributions to ESR amplitude.

• 对三种催化剂观测到相同ESR幅值对应着不同的积炭量,这意味着来自三种催化剂的不同反应物种对ESR幅值贡献不同。