TiP2O7catalysts characterised by in situRaman spectroscopy during the oxidative dehydrogenation of n-butane

Literature Information

Publication Date 2003-08-26
DOI 10.1039/B305787A
Impact Factor 3.676
Authors

S. Loridant, I. C. Marcu, G. Bergeret, J. M. M. Millet


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Abstract

The structural and chemical stability of TiP2O7 has been investigated by Raman spectroscopy under an n-butane–O2–He gas mixture (1∶1∶2). Titanium pyrophosphate powders with low and high specific surface areas have been characterised up to 560 °C. No structural transition or chemical decomposition was evidenced under the gas feed used. However, the overall intensity of the Raman spectrum decreased sharply at 400 °C in parallel with the deposition of disordered graphite at the surface and reappeared above 450 °C when the carboneous compound burned. This phenomenon was completely reversible on decreasing the temperature. The deposit appearing with the reduction of TiP2O7 could arise from the trapping of reaction intermediates by oxygen vacancies at the surface. Above 450 °C, the carboneous compound disappeared when the diffusion rate of oxygen vacancies increased. The same phenomenon was observed on high surface area TiP2O7 for which supplementary bands assigned to surface modes were observed.

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Front/Back Matter

DOI: 10.1039/C6CP90135B

Inside front cover

Cover

DOI: 10.1039/C6CP90134D

Inside back cover

Cover

DOI: 10.1039/C6CP90141G

Towards understanding the improved stability of palladium supported on TS-1 for catalytic combustion

Jarrod Friggieri, Hadi Hosseiniamoli, Eric M. Kennedy, Bogdan Z. Dlugogorski, Adesoji A. Adesina, Michael Stockenhuber

2016-03-11 Paper

DOI: 10.1039/C6CP00319B

Inside back cover

Cover

DOI: 10.1039/C6CP90130A

Collision induced state-to-state energy transfer dynamics between the 2u (1D2) and 2g (1D2) ion-pair states of I2

Shoma Hoshino, Yukio Nakano, Mitsunori Araki, Takashi Ishiwata, Koichi Tsukiyama

2016-04-13 Paper

DOI: 10.1039/C6CP00222F

Inside front cover

Cover

DOI: 10.1039/C6CP90123A

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
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