The adsorption heat of steam on the catalyst decreased and the amount of adsorbing centers did not change as the amount of cerium oxide in the samples was increased.

• 实验结果表明，随着铈含量的增加，样品对水蒸汽的可逆吸附过程的吸附热降低，铈含量超过一定值后吸附热又略有升高。