| 摘 要： | CH_2DC~(18(16))OOCH_3 and CH_3C~(18(16))OOCH_3 were detected simultane-ously in the trapping reaction with D_2~(18)O as the trapping agent followed bypurging the catalyst with MeOH in N_2 stream,demonstrating the coexistence ofketene and acetyl intermediates in ethanol synthesis from syngas over rhodiumcatalysts.The percentage of deuterated methyl acetate in total AcOMe incrasedwith the ratio of D_2~(18)O/H_2,indicating that the trapping of ketene strongly com-peted with its further hydrogenation,and implying that ketene was a key C_2-in-termediate.
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