【摘要】 研究了不同方法制备的 Ａｎ／Ｆｅ２Ｏ３催化剂上常温常湿条件下 ＣＯ的氧化性能．结果表明，加料顺序、焙烧温度、沉淀剂种类、金含量等因素对催化剂的稳定性均有较大影响，其中以Ｋ２ＣＯ３或Ｎａ２ＣＯ３为沉淀剂，金含量３％，焙烧温度２５０～３５０℃ 制得的催化剂具有较好的稳定性和抗水性，于２５℃连续加入水蒸气反应４３０ ｈ可保持ＣＯ完全转化． ＸＲＤ结果表明，催化剂的稳定性与单质金及α－Ｆｅ２Ｏ３的粒径成反比，并与金和铁的化学状态有关．更多还原

【Abstract】 The catalytic performance of CO oxidation at ambient temperature and moisture over An/Fe2O3 catalysts prepared by different methods was studied. It was found that the stability of the catalysts was greatly changed with the variation of the preparation methods, the kind of precipitant, calcination temperature, and An loading. The sample of 3%An/Fe2O3 prepared by adding HAuCl4 and Fe2 (NO3)3 with K2CO3 or Na3CO3 as the precipitants, calcined at 250-350℃ in air for 3 h has the best stability and the best ability of resisting moisture, that is, the sample can maintain CO complete conversion at 25℃ and ambient moisture for at least 430h. The XRD results indicate that the stability is inversely proportional to the metallic gold and a-Fe2O3 particle sizes, and the chemical states of gold and iron were the main controlling factors of the stability of An/Fe2O3.更多还原