CO2-TPD出峰在750℃还算是碱性位点么?石灰石的分解温度是786度。碳酸氧镧的分解温度也不到500度。Catalysis Today, Volume 131, Issues 1–4, 29 February 2008, Pages 278-284那么高的温度不一定是脱附的二氧化碳。 侯老师，对于La2O3掺杂的催化剂的CO2-TPD图我也看了一些，我发现基本都没有做到700以后。纯的氧化镧我看到有一篇文献是这么解释的：For La2O3, the rate of CO2 desorption started increasing at about 450 K and reached the first maximum at 653 K. The second, and much larger, peak was at 1032 K. The positions of these peaks are consistent with the reported thermal stability of La2(CO3)3 based on thermogravimetric, calorimetric, spectroscopic, and elemental analyses. The bulk carbonate phase initially converts into oxycarbonates, La2O3·CO2, at about 570-675 K, which then decompose to La2O3 at about 770-1000 K, with the decomposition being complete around 1100 K.（J. Phys. Chem. B 2004, 108, 15770-15781） 其实我看了许久没看明白，这个就是指形成了碳酸盐分解的温度，跟碱性位点无关是么，查看更多
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