An in situ, energy-dispersive X-ray diffraction study of natural gas conversion by CO2 reforming

A. T. Ashcroft, A. K. Cheetham*, R. H. Jones, S. Natarajan, J. M. Thomas, D. Waller, S. M. Clark

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

The selective CO2 reforming of methane to synthesis gas over a rare-earth iridate pyrochlore, Ln2Ir2O7 (Ln = Eu), and rare-earth ruthenate pyrochlores, Ln2Ru2O7 (Ln = Nd, Sm, Eu, Gd), has been studied in situ by using energy-dispersive X-ray diffraction with synchrotron radiation. Analysis of the diffraction data shows that the oxides are activated by reduction to the platinum group metal, the iridate by a second-order kinetic reaction, and the ruthenates by a first-order process. Temperature programmed reductions under carbon monoxide, hydrogen, and methane establish that the iridates proceed directly to the metal, whereas the ruthenates reduce via an oxygen deficient pyrochlore.

Original languageEnglish
Pages (from-to)3355-3358
Number of pages4
JournalJournal of Physical Chemistry
Volume97
Issue number13
Publication statusPublished - 1993
Externally publishedYes

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