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采用程序升温技术（包括ＴＰＲ、ＴＰＯ－ＭＳ和ＴＰＤ）以及ＣＯ和Ｏ２的脉冲吸附方法，研究了Ｃｏ－Ｐｔ（Ｐｄ，Ｒｈ）／γ－Ａｌ２Ｏ３催化剂对Ｏ２和ＣＯ的吸附性能，及催化剂上Ｈ２、Ｏ２溢流的可能性，并探讨了ＣＯ的氧化机理．ＴＰＲ和ＴＰＯ－ＭＳ的结果表明，微量贵金属的存在不但促进了氧化态样品的还原，而且促进了还原态样品的氧化．使ＴＰＲ还原峰温下降了９０℃以上，ＴＰＯ氧化峰温下降了２０－６０℃，这些现象可能与贵金属对Ｈ２、Ｏ２的溢流效应有关．Ｈ２的溢流使样品在制备阶段的还原更加彻底，Ｏ２的溢流为表面钴相提供了更活泼的氧物种，这对活性的提高显然是有益的，因而也是催化协同效应的重要来源．Ｏ２－ＴＰＤ以及ＣＯ和Ｏ２的脉冲吸附结果表明，ＣＯ和Ｏ２主要是以化学吸附方式存在于Ｃｏ／γ－Ａｌ２Ｏ３和Ｃｏ－Ｐｔ／γ－Ａｌ２Ｏ３催化剂上，微量贵金属的存在促进了它们对ＣＯ和Ｏ２的吸附能力，尤其是对Ｏ２的吸附．在该系列催化剂上，ＣＯ的氧化可能是按Ｌａｎｇ－ｍｕｉｒ－Ｈｉｎｓｈｅｌｗｏｏｄ机理进行的．
The adsorption properties of Co-Pt (Pd, Rh) / γ-Al2O3 for O2 and CO were studied by temperature programmed technique (including TPR, TPO-MS and TPD) and pulsed adsorption of CO and O2. , The possibility of O2 overflow, and discussed the oxidation mechanism of CO. The results of TPR and TPO-MS show that the existence of trace precious metals not only promotes the reduction of oxidized samples but also promotes the oxidation of reduced samples. The peak temperature of TPR reduction decreased by more than 90 ℃, and the peak temperature of TPO decreased by 20-60 ℃. These phenomena may be related to the overflow effect of noble metal on H2 and O2. The over-flow of H2 provides a more complete reduction of the sample during the preparation stage. The over-flow of O2 provides a more active species of oxygen to the surface cobalt phase. This is obviously beneficial to the activity enhancement and therefore to an important source of catalytic synergism. The results of pulsed adsorption of O2-TPD and CO and O2 show that CO and O2 are mainly present on Co / γ-Al2O3 and Co-Pt / γ-Al2O3 catalysts by chemical adsorption. The existence of trace amounts of precious metals promotes their CO and O2 adsorption capacity, especially for the adsorption of O2. On this series of catalysts, oxidation of CO may be based on the Langmuir-Hinshelwood mechanism.