Research output: Contribution to journal › Article › peer-review
Study on reduction behavior of two-component Fe–Mg–O oxide system prepared via a sol-gel technique. / Karnaukhov, Timofey M.; Vedyagin, Aleksey A.; Cherepanova, Svetlana V. et al.
In: International Journal of Hydrogen Energy, Vol. 42, No. 52, 28.12.2017, p. 30543-30549.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Study on reduction behavior of two-component Fe–Mg–O oxide system prepared via a sol-gel technique
AU - Karnaukhov, Timofey M.
AU - Vedyagin, Aleksey A.
AU - Cherepanova, Svetlana V.
AU - Rogov, Vladimir A.
AU - Stoyanovskii, Vladimir O.
AU - Mishakov, Ilya V.
PY - 2017/12/28
Y1 - 2017/12/28
N2 - Two-component Fe–Mg–O oxide system was prepared via sol-gel technique. An aqueous solution of iron nitrate was used to hydrolyze the magnesium methoxide instead of distilled water. The iron loading in a final sample was 15 wt% with respect to Fe2O3. The method was shown to provide a uniform distribution of iron oxide within MgO matrix. The sample was characterized by means of a low-temperature nitrogen adsorption and scanning electron microscopy. Reduction behavior of the sample was studied in a temperature-programmed regime using hydrogen as a reducing agent. In order to follow the possible phase transformations, the sample was examined by an in situ X-ray diffraction analysis in both reductive and oxidative atmospheres within the temperature range of 25–700 °C. It was found that after the first cycle of reduction/re-oxidation, the sample stabilizes in a novel state, and hydrogen uptake profiles of further cycles of reductive/oxidative treatment become completely reproducible. According to X-ray diffraction data, the sample consists of small particles (9 nm) of Fe3O4 phase well-dispersed within the structure of nanocrystalline MgO.
AB - Two-component Fe–Mg–O oxide system was prepared via sol-gel technique. An aqueous solution of iron nitrate was used to hydrolyze the magnesium methoxide instead of distilled water. The iron loading in a final sample was 15 wt% with respect to Fe2O3. The method was shown to provide a uniform distribution of iron oxide within MgO matrix. The sample was characterized by means of a low-temperature nitrogen adsorption and scanning electron microscopy. Reduction behavior of the sample was studied in a temperature-programmed regime using hydrogen as a reducing agent. In order to follow the possible phase transformations, the sample was examined by an in situ X-ray diffraction analysis in both reductive and oxidative atmospheres within the temperature range of 25–700 °C. It was found that after the first cycle of reduction/re-oxidation, the sample stabilizes in a novel state, and hydrogen uptake profiles of further cycles of reductive/oxidative treatment become completely reproducible. According to X-ray diffraction data, the sample consists of small particles (9 nm) of Fe3O4 phase well-dispersed within the structure of nanocrystalline MgO.
KW - Characterization
KW - Doping
KW - Iron oxide
KW - Nanostructured MgO
KW - Reduction behavior
KW - MAGNESIUM-OXIDE
KW - SUPPORTED IRON CATALYSTS
KW - H-2
KW - CO
KW - OXIDATION-KINETICS
KW - HYDROGEN
KW - LOW-TEMPERATURE REDUCTION
KW - NI
UR - http://www.scopus.com/inward/record.url?scp=85034740141&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2017.11.036
DO - 10.1016/j.ijhydene.2017.11.036
M3 - Article
AN - SCOPUS:85034740141
VL - 42
SP - 30543
EP - 30549
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 52
ER -
ID: 9399306