Probing the Role of a Non-Thermal Plasma (NTP) in the Hybrid NTP Catalytic Oxidation of Methane

Dr. Emma K Gibson, Dr. Cristina E Stere, Bronagh Curran-McAteer, Wilm JOnes, Dr. Giannantonio Cibin, Dr. Diego Gianolio, Prof Alexandre Goguet, Dr. Peter P. Wells, Prof. C. Richard A. Catlow, Dr Paul Collier, Dr. Peter Hinde, Prof. Christopher Hardacre

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Abstract

Three recurring hypotheses are often used to explainthe effect of non-thermal plasmas (NTPs) on NTP catalytichybrid reactions;namely,modification or heating of thecatalyst or creation of new reaction pathwaysbyplasma-produced species.NTP-assisted methane (CH4)oxidation overPd/Al2O3was investigated by direct monitoring of the X-rayabsorption fine structure of the catalyst, coupled with end-of-pipe mass spectrometry.This in situ study revealed that thecatalyst did not undergo any significant structural changesunder NTP conditions.However,the NTP did lead to anincrease in the temperature of the Pd nanoparticles;althoughthis temperature rise was insufficient to activate the thermalCH4oxidation reaction. The contribution of alower activationbarrier alternative reaction pathway involving the formation ofCH3(g) from electron impact reactions is proposed.
Original languageEnglish
Pages (from-to)9351-9355
JournalAngewandte Chemie International Edition
Volume56
Issue number32
DOIs
Publication statusPublished - 06 Jul 2017

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