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利用FT-IR原位考察了稀土氧化镨上CO和表面羟基的反应。在473K以下,未检测到CO和氧化镨表面反应的吸附物种;在CO气氛中,升温到473K,观察到甲酸根吸附物种的红外特征峰1578,1371和1367cm~(-1)。用同位素D_2部分还原的氧化镨吸附CO以及甲酸吸附证实了CO与氧化镨表面的羟基反应可生成表面甲酸根吸附物种。讨论了CO在氧化镨表面的反应机理及甲酸根的氧化过程。
The reaction of CO with surface hydroxyl on rare earth oxide praseodymium was investigated by FT-IR. Below 473K, no adsorbed CO and praseodymium oxide species were detected; in the CO atmosphere, the infrared peaks of 1578, 1371 and 1367cm -1 were observed for the formate adsorbed species when the temperature was elevated to 473K. Partial reduction of isotope D_2 with praseodymium oxide adsorbed CO and formic acid adsorption confirmed that CO reacts with hydroxyl groups on the surface of praseodymium oxide to form surface formate-adsorbed species. The reaction mechanism of CO on praseodymium oxide and the oxidation of formate were discussed.