CO振動励起によるMars-van Krevelen反応機構の促進

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  • CO シンドウ レイキ ニ ヨル Mars-van Krevelen ハンノウ キコウ ノ ソクシン

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Nonthermal plasma (NTP) catalysis has drawn a keen attention as a promising emerging-type green technology that, for example, converts CO2 into a valuable chemical commodity beyond thermal equilibrium limitation. Although it is vital to gain an insight into the reaction promotion mechanisms arising from NTP, it remains a significant challenge due to the missing link between NTP-activated reactive species and catalytic materials. Here, vibrationally-excited CO was studied by applying in situ transmission infrared spectroscopy which enables the measurement of the vibrational temperature of CO and the observation of the surface reaction of vibrationally-excited CO to form intermediates species over wurtzite ZnO. The reaction behavior of NTP-activated CO was correlated with vibrational temperature of CO, showing that vibrationally-excited CO reacts with lattice oxygen via the Mars-van Krevelen (MvK) mechanism, leading to higher activity than conventional thermal catalysis. In addition to Langmuir-Hinshelwood and Eley-Rideal surface reaction mechanisms, NTP promotion of MvK mechanisms via vibrationally excited molecules is validated

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  • 静電気学会誌

    静電気学会誌 47 (1), 8-13, 2023

    一般社団法人静電気学会

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