Abstract
The interaction of methane at various temperatures with NO x species formed by room temperature adsorption of NO + O2 mixture on tungstated zirconia (18.6 wt.% WO3) and palladium(II)-promoted tungstated zirconia (0.1 wt.% Pd) has been investigated using in situ FT-IR spectroscopy. A mechanism for the reduction of NO over the Pd-promoted tungstated zirconia is proposed, which involves a step consisting of thermal decomposition of the nitromethane to adsorbed NO and formates through the intermediacy of cis-methyl nitrite. The HCOO− formed acts as a reductant of the adsorbed NO producing nitrogen.
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Acknowledgements
This work was financially supported by Bilkent University and the Scientific and Technical Research Council of Turkey (TÜBITAK), Project TBAG-2140.
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Kantcheva, M., Cayirtepe, I. FT-IR spectroscopic investigation of the surface reaction of CH4 with NO x species adsorbed on Pd/WO3–ZrO2 catalyst. Catal Lett 115, 148–162 (2007). https://doi.org/10.1007/s10562-007-9081-1
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DOI: https://doi.org/10.1007/s10562-007-9081-1