Elucidation of the reaction mechanism on dry reforming of methane in an electric field by in situ DRIFTs

Naoya Nakano; Maki Torimoto; Hiroshi Sampei; Reiji Yamashita; Ryota Yamano; Koki Saegusa; Ayaka Motomura; Kaho Nagakawa; Hideaki Tsuneki; Shuhei Ogo; Yasushi Sekine

doi:10.1039/D2RA00402J

Elucidation of the reaction mechanism on dry reforming of methane in an electric field by in situ DRIFTs†

Naoya Nakano,^a Maki Torimoto,^a Hiroshi Sampei,

^a Reiji Yamashita,^a Ryota Yamano,^a Koki Saegusa,^a Ayaka Motomura,^a Kaho Nagakawa,^a Hideaki Tsuneki,^a Shuhei Ogo

^bc and Yasushi Sekine

*^a

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* Corresponding authors

^a Department of Applied Chemistry, Waseda University, 3-4-1, Okubo, Shinjuku, Tokyo, Japan
E-mail: ysekine@waseda.jp

^b Department of Marine Resources Science, Faculty of Agriculture and Marine Science, Kochi University, Nankoku, Japan

^c Center for Advanced Marine Core Research, Kochi University, Nankoku, Japan

Abstract

With increasing expectations for carbon neutrality, dry reforming is anticipated for direct conversion of methane and carbon dioxide: the main components of biogas. We have found that dry reforming of methane in an electric field using a Pt/CeO₂ catalyst proceeds with sufficient rapidity even at a low temperature of about 473 K. The effect of the electric field (EF) on dry reforming was investigated using kinetic analysis, in situ DRIFTs, XPS, and DFT calculation. In situ DRIFTs and XPS measurements indicated that the amount of carbonate, which is an adsorbed species of CO₂, increased with the application of EF. XPS measurements also confirmed the reduction of CeO₂ by the reaction of surface oxygen and CH₄. The reaction between CH₄ molecules and surface oxygen was promoted at the interface between Pt and CeO₂.

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Elucidation of the reaction mechanism on dry reforming of methane in an electric field by in situ DRIFTs†

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Elucidation of the reaction mechanism on dry reforming of methane in an electric field by in situ DRIFTs

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