Coke-free methane dry reforming over nano-sized NiO-CeO2 solid solution after exsolution

Siva P. Padi, Lee Shelly, Eswaravara P. Komarala, Danielle Schweke, Shmuel Hayun, Brian A. Rosen

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Exsolution as a method for catalyst preparation is generally only studied in perovskites or similar systems, which puts a constraint on the catalyst support composition, owing to size and charge balance effects. We show that Ni nanoparticle growth occurs via the exsolution mechanism from a NiO-CeO2 solid solution with the fluorite structure to form the supported Ni/CeO2 catalyst. This supported catalyst showed high methane dry reforming activity and coke-free performance at 800 °C and using 50 vol% CH4/50 vol% CO2 feed gas composition and 5000 Lkgcat−1 h−1. The use of solid-solutions such as these can therefore expand the variety of catalyst supports which could provide coke-free performance under dry reforming reaction conditions.

Original languageEnglish
Article number105951
JournalCatalysis Communications
Volume138
DOIs
StatePublished - 15 Apr 2020

Keywords

  • Ceria
  • Coke-free catalyst
  • Methane dry reforming
  • Solid-phase crystallization

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