Probing the role of a non-thermal plasma (NTP) in the hybrid NTP-catalytic oxidation of CH4

Research output: Contribution to journalArticle

  • External authors:
  • Emma K Gibson
  • Cristina Stere
  • Bronagh Curran-McAteer
  • Wilm Jones
  • Giannantonio Cibin
  • Diego Gianolio
  • Alexandre Goguet
  • Peter P. Wells
  • C Richard A Catlow
  • Paul Collier
  • Peter Hinde

Abstract

Three recurring hypothesis are often used to explain the effect of non-thermal plasma (NTP) on NTP-catalytic hybrid reactions, namely, modification or heating of the catalyst or the ability of plasma produced species to open up new reaction pathways. By directly monitoring the catalyst by X-ray absorption fine structure (XAFS) coupled with end of pipe mass spectrometry the NTP assisted CH4 oxidation over Pd/Al2O3 was investigated. This in situ study has shown that the catalyst did not undergo any significant structural changes under NTP conditions. However, the NTP did lead to the Pd nanoparticle temperature increasing but this temperature rise was insufficient to activate the thermal CH4 oxidation reaction. The contribution of a lower activation barrier alternative reaction pathway involving the formation of CH3(g) via electron impact reactions is proposed.

Bibliographical metadata

Original languageEnglish
JournalAngewandte Chemie
StateAccepted/In press - 16 Jun 2017