Methane dissociative adsorption in catalytic steam reforming of methane over Pd/CeO2 in an electric field

S. Okada, R. Manabe, R. Inagaki, Shuhei Ogo, Yasushi Sekine

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

To elucidate the reaction mechanism of catalytic steam reforming of methane in an electric field, operando-diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) has been used to investigate methane dissociative adsorption at low temperatures using CH4, H2O, and their isotopes. Operando-analyses demonstrated that methane was adsorbed and converted into CO and CO2 more when CD4 and/or D2O was used instead of CH4 and/or H2O. This observed "inverse" kinetic isotope effect is based on the difference of CHH vibrational energy level at the transition state. Furthermore, CO2-methanation, which is the reverse reaction of steam reforming of methane, was irreversible with H2O in an electric field. These results demonstrate that the proton collision promoted methane activation irreversibly, even at low temperatures in an electric field.

Original languageEnglish
JournalCatalysis Today
DOIs
Publication statusAccepted/In press - 2016 Sep 28

Fingerprint

Catalytic reforming
Steam reforming
Methane
Electric fields
Adsorption
Isotopes
Methanation
Carbon Monoxide
Electron transitions
Electron energy levels
Fourier transform infrared spectroscopy
Protons
Chemical activation
Temperature
Kinetics

Keywords

  • Electric field
  • Hydrogen production
  • Inverse kinetic isotope effect
  • Methanation
  • Operando-DRIFTS

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Cite this

Methane dissociative adsorption in catalytic steam reforming of methane over Pd/CeO2 in an electric field. / Okada, S.; Manabe, R.; Inagaki, R.; Ogo, Shuhei; Sekine, Yasushi.

In: Catalysis Today, 28.09.2016.

Research output: Contribution to journalArticle

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