用共沉淀法合成了八种稀土钴酸盐,用X-射线衍射测定为钙钛矿型结构。以CO及H_2氧化为模式,反复测定了它们的催化活性;用程序升温还原研究了它们的还原能力;计算了表面氧结合能的大小。结果发现,在催化活性、表面氧结合能和程序升温还原曲线上的T_(max)间有很好联系,即表面氧结合能愈小,程序升温还原曲线上T_(max)愈低,则催化活性愈高。 Eight kinds of rare earth cobaltates were synthesized by coprecipitation, and their perovskite structures were determined by X-ray diffraction. Their CO 2 and H 2 oxidation patterns were used to determine their catalytic activity. Their reduction potentials were investigated by temperature programmed reduction. The size of the surface oxygen binding energy was calculated. The results showed that there was a good relationship between the catalytic activity, surface oxygen binding energy and the T max on the temperature-programmed reduction curve. That is, the smaller the oxygen binding energy, the lower the T max on the temperature-programmed reduction curve. The higher activity.