Synthesis of binary Co–Mg–O oxide system and study of its behavior in reduction/oxidation cycling; International Journal of Hydrogen Energy; Vol. 44, iss. 37
| Parent link: | International Journal of Hydrogen Energy Vol. 44, iss. 37.— 2019.— [P. 20690-20699] |
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| Autor kompanije: | |
| Daljnji autori: | , , , , , |
| Sažetak: | Title screen The nanoscale Co-Mg-O oxide sample (15 wt% in terms of Co3O4) was prepared from the corresponding xerogel synthesized by the modified sol-gel method. The hydrolysis of as-prepared Mg(OCH3)2 was carried out using the aqueous solution of Co(NO3)2 precursor. The CoOx nanocrystallites of about 10-20 nm in size were shown to be uniformly distributed within the MgO matrix. The reduction of Co-Mg-O in H2 flow was found to proceed in two separate stages within the temperature ranges of 200-350 °C and 350-600 °C. The prepared binary Co-Mg-O system was demonstrated to possess completely reproducible reduction behavior in the consecutive reduction/reoxidation cycles. The phase composition of the sample exposed to both the reducing and oxidative environment was followed by an in situ X-ray diffraction analysis performed at temperatures of 25, 300, 500 and 700 °C. The determined lattice parameters for MgO (a = 4.219 Å) and Co3O4 (a = 8.110 Å) were found to be slightly increased as compared with the values from Powder Diffraction File, so that the formation of joint non-stoichiometric (Mg1-xCox)O and (Co3-xMgx)O4 phases was suggested. The strong chemical interaction of cobalt oxide with MgO matrix was also evidenced by the data of a diffuse reflectance UV-vis spectroscopy. Режим доступа: по договору с организацией-держателем ресурса |
| Jezik: | engleski |
| Izdano: |
2019
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| Teme: | |
| Online pristup: | https://doi.org/10.1016/j.ijhydene.2018.05.044 |
| Format: | Elektronički Poglavlje knjige |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=661245 |
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| 200 | 1 | |a Synthesis of binary Co–Mg–O oxide system and study of its behavior in reduction/oxidation cycling |f A. A. Vedyagin [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 49 tit.] | ||
| 330 | |a The nanoscale Co-Mg-O oxide sample (15 wt% in terms of Co3O4) was prepared from the corresponding xerogel synthesized by the modified sol-gel method. The hydrolysis of as-prepared Mg(OCH3)2 was carried out using the aqueous solution of Co(NO3)2 precursor. The CoOx nanocrystallites of about 10-20 nm in size were shown to be uniformly distributed within the MgO matrix. The reduction of Co-Mg-O in H2 flow was found to proceed in two separate stages within the temperature ranges of 200-350 °C and 350-600 °C. The prepared binary Co-Mg-O system was demonstrated to possess completely reproducible reduction behavior in the consecutive reduction/reoxidation cycles. The phase composition of the sample exposed to both the reducing and oxidative environment was followed by an in situ X-ray diffraction analysis performed at temperatures of 25, 300, 500 and 700 °C. The determined lattice parameters for MgO (a = 4.219 Å) and Co3O4 (a = 8.110 Å) were found to be slightly increased as compared with the values from Powder Diffraction File, so that the formation of joint non-stoichiometric (Mg1-xCox)O and (Co3-xMgx)O4 phases was suggested. The strong chemical interaction of cobalt oxide with MgO matrix was also evidenced by the data of a diffuse reflectance UV-vis spectroscopy. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t International Journal of Hydrogen Energy | ||
| 463 | |t Vol. 44, iss. 37 |v [P. 20690-20699] |d 2019 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a sol-gel technique | |
| 610 | 1 | |a nanocrystalline MgO | |
| 610 | 1 | |a cobalt oxide | |
| 610 | 1 | |a solid solutions | |
| 610 | 1 | |a reduction behavior | |
| 610 | 1 | |a золь-гель технологии | |
| 610 | 1 | |a оксид кобальта | |
| 610 | 1 | |a твердые растворы | |
| 701 | 1 | |a Vedyagin |b A. A. |c Chemist |c Chief Expert of Tomsk Polytechnic University, Candidate of chemical sciences |f 1975- |g Aleksey Anatolievich |3 (RuTPU)RU\TPU\pers\36694 | |
| 701 | 1 | |a Karnaukhov |b T. M. |g Timofey | |
| 701 | 1 | |a Cherepanova |b S. V. |g Svetlana | |
| 701 | 1 | |a Stoyanovskii |b V. O. |g Vladimir | |
| 701 | 1 | |a Rogov |b V. A. |g Vladimir | |
| 701 | 1 | |a Mishakov |b I. V. | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Исследовательская школа химических и биомедицинских технологий |c (2017- ) |3 (RuTPU)RU\TPU\col\23537 |
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