Research output: Contribution to journal › Article › peer-review
Thermal stability of surface nitrogen–oxygen complexes and phase transitions in ZrO2. / Matyshak, V. A.; Sil’chenkova, O. N.; Sadykov, V. A. et al.
In: Kinetics and Catalysis, Vol. 57, No. 2, 01.03.2016, p. 234-242.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Thermal stability of surface nitrogen–oxygen complexes and phase transitions in ZrO2
AU - Matyshak, V. A.
AU - Sil’chenkova, O. N.
AU - Sadykov, V. A.
AU - Korchak, V. N.
PY - 2016/3/1
Y1 - 2016/3/1
N2 - The IR spectra of surface compounds observed in the course of the temperature-programmed desorption (TPD) of NOx and the TPD spectra are compared. The high-temperature peaks of desorption are related to the decomposition of surface nitrites and nitrates. The low-temperature peaks of NOx desorption with maximums below 140°C are caused by the decomposition of surface nitrosyls. On the heating of surface nitrosyls, the following two reaction paths are possible: desorption at low temperatures and conversion into nitrates. The shape of the TPD spectra of NO depends on the phase composition of test samples. The transition of a tetragonal phase into a monoclinic one occurred upon the surface dehydroxylation of polycrystalline particles with the formation of particles with a tetragonal nucleus and a monoclinic crust. This transition is reversible. The cooling of a sample in a moist atmosphere leads to the transition of the monoclinic crust to the tetragonal phase.
AB - The IR spectra of surface compounds observed in the course of the temperature-programmed desorption (TPD) of NOx and the TPD spectra are compared. The high-temperature peaks of desorption are related to the decomposition of surface nitrites and nitrates. The low-temperature peaks of NOx desorption with maximums below 140°C are caused by the decomposition of surface nitrosyls. On the heating of surface nitrosyls, the following two reaction paths are possible: desorption at low temperatures and conversion into nitrates. The shape of the TPD spectra of NO depends on the phase composition of test samples. The transition of a tetragonal phase into a monoclinic one occurred upon the surface dehydroxylation of polycrystalline particles with the formation of particles with a tetragonal nucleus and a monoclinic crust. This transition is reversible. The cooling of a sample in a moist atmosphere leads to the transition of the monoclinic crust to the tetragonal phase.
KW - Fourier transform IR spectroscopy
KW - NO reduction
KW - ZrO
UR - http://www.scopus.com/inward/record.url?scp=84979518541&partnerID=8YFLogxK
U2 - 10.1134/S002315841602004X
DO - 10.1134/S002315841602004X
M3 - Article
AN - SCOPUS:84979518541
VL - 57
SP - 234
EP - 242
JO - Kinetics and Catalysis
JF - Kinetics and Catalysis
SN - 0023-1584
IS - 2
ER -
ID: 25395093