Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 30543-30549 |
| Number of pages | 7 |
| Journal | International Journal of Hydrogen Energy |
| Volume | 42 |
| Issue number | 52 |
| DOIs | |
| Publication status | Published - 28 Dec 2017 |
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Keywords
- Characterization
- Doping
- Iron oxide
- Nanostructured MgO
- Reduction behavior
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology
Cite this
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.; Rogov, Vladimir A.; Stoyanovskii, Vladimir O.; Mishakov, Ilya V.
In: International Journal of Hydrogen Energy, Vol. 42, No. 52, 28.12.2017, p. 30543-30549.Research output: Contribution to journal › Article
}
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
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UR - http://www.scopus.com/inward/citedby.url?scp=85034740141&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2017.11.036
DO - 10.1016/j.ijhydene.2017.11.036
M3 - Article
VL - 42
SP - 30543
EP - 30549
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 52
ER -