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应用原位红外光谱的方法,在反应现场条件下,研究了促进型甲酸甲酯(MF)氢解制甲醇铜铬催化剂上的化学吸附物种.结果表明,在MF氢解反应条件下,工作态催化剂上主要的化学吸附物种和反应中间物种是CH3O-CHO…H-O(a)(1751,2730,1455cm-1)、CH3O-CHO…Cu+(a)(1654,2730,1455cm-1)、CH3O-CHO…Cr3+(a)(1552,2730,1445cm-1)和OCH3(3012,2946,1455cm-1).结合对该催化剂活性位本质的探讨,推断了甲酸甲酯氢解制甲醇的主要反应途径.
In-situ IR spectroscopy was used to study chemisorbed species on Cu-Cr catalyst on methanol-promoted hydrogenolysis of methyl formate (MF). The results showed that under the condition of MF hydrogenolysis reaction, the main chemisorption species and reaction intermediate species on the working catalyst were CH3O-CHO ... H-O (a) (1751,2730,1455cm-1), CH3O-CHO ... Cu + (A) (1654, 2730, 1455 cm-1), CH3O-CHO ... Cr3 + (a) (1552, 2730, 1445 cm-1) and OCH3 (3012, 2946, 1455 cm-1). Combined with the nature of the active site of the catalyst, the main reaction pathway for the hydrogenolysis of methyl formate to methanol was inferred.