The calculated values from the coverage are very close to the experimental values, which guarantees the coverage accuracy calculated from the fittings. As shown in Table , at all temperature, the R 2 value for the RDS of Ru is closer to 1 than that of Ru+K. However, Figure shows that the order of hydrogen calculated by the coverage derived from the fitting results is closer to the experimental value for Ru+K. Therefore, if the R 2 value is close to 1, the Ki and ki obtained by fitting and the coverage θi calculated from them are also obtained at an appreciable level.