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OALib Journal期刊
ISSN: 2333-9721
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cuβ催化剂上氧化羰基合成碳酸二甲酯的原位漫反射红外光谱研究
, PP. 1212-1221
Keywords: cu&beta,氧化羰基,碳酸二甲酯,反应机理,原位漫反射红外光谱
Abstract:
？采用原位漫反射红外光谱法研究了cuβ催化剂上氧化羰基合成碳酸二甲酯(dmc)的反应机理,考察了甲醇、一氧化碳和dmc的单独吸附及混合气吸附。结果表明,cuβ催化剂上只存在一种活性位,位于六元环中;氧气能够氧化吸附态的甲醇产生甲氧基和水;dmc吸附在cuβ催化剂上时,以羰基中的氧原子吸附在活性位上更加稳定;反应存在生成单甲氧基物种和双甲氧基物种两条路径,单甲氧基物种与co反应生成单甲基碳酸盐物种(mmc),mmc再与甲氧基反应生成dmc;co插入双甲氧基物种也可以得到dmc。在cuβ催化剂上更倾向于进行co插入双甲氧基物种这一路径。
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