担载型钯催化剂上甲醇的分解机理研究

Decomposition of methanol on supported palladium catalyst

考察了甲醇在Ｐｄ／ＳｉＯ２、Ｐｄ／Ｌａ２Ｏ３上的分解，用甲醇的脉冲实验考察了两种催化剂的相对活性以及不同催化剂上产物的分布，用ＸＰＳ考察了金属与载体之间的相互作用，并用原位ＦＴ－ＩＲ作为辅助手段证实了产物中甲烷的生成。

In contrast to the mechanism of methanol decomposition on Pd/SiO_2 and Pd/La_2O_3 has been studied by using methanol pulse reaction, Xray photoelectron spectroscopy(XPS) and in situ FTIR. The result of pulse reaction shows that Pd/La_2O_3 has higher activity than Pd/SiO_2,and the ratio of CH_4 to CO in decomposition of methanol on Pd/La_2O_3 is higher than that on Pd/SiO_2. the XPS result indicates that there exists metal support interaction on Pd/La_2O_3, but not on Pd/SiO_2. The insitu FTIR study verifies the formation of CH_4 in decomposition of methanol on suported Pd catalyst.