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- W2036211667 abstract "In situ infrared (IR) spectroscopy coupled with dynamic and steady-state isotopic transient kinetic analysis permits observation of the transient response (i.e., dynamics) of IR-observable adsorbates as well as gaseous reactants and products. This technique was used to examine the reaction pathway, reactivity of adsorbates, and nature of sites for the CO/H2/C2H4 reaction on MnRh/SiO2. Dynamic infrared study reveals that Rh0 sites which chemisorb linear CO actively catalyze CO insertion, a key step for the formation of propionaldehyde from the CO/H2/C2H4 reaction. Tilted CO on MnRh/SiO2 is not active for the reaction, demonstrating a lack of connection in reactivity between the low wavenumber CO on metal surfaces and in metal complexes. Steady-state isotopic transient IR studies by pulse injection of D2 and13CO produce transient responses which carry mechanistic information for elucidation of catalysis of the CO/H2/C2H4 reaction. The broad response of D-containing propionaldehyde reveals that multiple pathways for hydrogenation take place simultaneously with a wide distribution of the reactivity of adsorbed deuterium or hydrogen; the sharp response of C2H513CHO unravels the narrow distribution of reactivity of adsorbed CO for CO insertion." @default.
- W2036211667 created "2016-06-24" @default.
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- W2036211667 date "1997-03-01" @default.
- W2036211667 modified "2023-09-30" @default.
- W2036211667 title "Mechanistic study in catalysis using dynamic and isotopic transient infrared spectroscopy: CO/H2C2H4 reaction on MnRh/SiO2" @default.
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- W2036211667 doi "https://doi.org/10.1016/s0926-860x(96)00271-2" @default.
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