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采用ＴＰＳＲ－ＭＳ及ＴＰＤ－ＭＳ技术研究了Ｐｄ／ＣｅＯ２－γＡｌ２Ｏ３体系催化剂上表面氧物种脱附－恢复和甲醇表面反应性能，并以甲醇氧化反应为探针考察了催化剂在不同气氛下的氧化活性．结果表明，ＣｅＯ２对γ－Ａｌ２Ｏ３载体的改性，有利于钯催化剂上表面氧物种的脱附和氧化再恢复，从而促进Ｐｄ／ＣｅＯ２－γ－Ａｌ２Ｏ３催化剂对甲醇的完全氧化．甲醇在催化剂表面的程脱过程中均产生选择性氧化产物甲醛、甲酸、ＣＯ和ＣＯ２，ＣｅＯ２的存在有利于甲醇的脱附及深度氧化，选择性氧化产物的脱附量明显减少，并发现ＣＯ２的脱附量及峰温次序与对甲醇的氧化活性一致．
The surface oxygen species desorption-recovery and methanol surface reactivity of Pd / CeO2-γAl2O3 catalysts were studied by TPSR-MS and TPD-MS techniques. The oxidative activity of the catalysts under different atmospheres was investigated by methanol oxidation reaction . The results showed that the modification of γ-Al2O3 carrier by CeO2 is favorable for the desorption and reoxidation of oxygen species on the surface of Pd catalysts and the complete oxidation of methanol over Pd / CeO2-γ-Al2O3 catalysts. Methanol produced selective oxidation products of formaldehyde, formic acid, CO and CO2 in the course of the catalyst surface desorption, and the presence of CeO2 favored the desorption and deep oxidation of methanol. The desorption of selective oxidation products was significantly reduced and found that CO2 The amount of desorption and peak temperature order is consistent with the methanol oxidation activity.