Low-temperature selective catalytic dehydrogenation of methylcyclohexane by surface protonics

Kent Takise, Ayaka Sato, Shuhei Ogo, Jeong Gil Seo, Ken Ichi Imagawa, Shigeru Kado, Yasushi Sekine

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The methylcyclohexane (MCH)-toluene cycle is a promising liquid organic hydride system as a hydrogen carrier. Generally, MCH dehydrogenation has been conducted over Pt-supported catalysts, for which it requires temperatures higher than 623 K because of its endothermic nature. For this study, an electric field was applied to Pt/TiO2 catalyst to promote MCH dehydrogenation at low temperatures. Selective dehydrogenation was achieved with the electric field application exceeding thermodynamic equilibrium, even at 423 K. With the electric field, "inverse" kinetic isotope effect (KIE) was observed by accelerated proton collision with MCH on the Pt/TiO2 catalyst. Moreover, Pt/TiO2 catalyst showed no methane by-production and less coke formation during MCH dehydrogenation. DRIFTS and XPS measurements revealed that electron donation from TiO2 to Pt weakened the interaction between catalyst surface and π-coordination of toluene. Results show that the electric field facilitated MCH dehydrogenation without methane and coke by-production over Pt/TiO2 catalyst.

Original languageEnglish
Pages (from-to)27743-27748
Number of pages6
JournalRSC Advances
Volume9
Issue number48
DOIs
Publication statusPublished - 2019 Jan 1

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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