СИНТЕЗ СКЛАДНООКСИДНИХ КОМПОЗИЦІЙ КОБАЛЬТУ–МАНГАНУ I ЦЕРІЮ–ЦИРКОНІЮ ТА ЇХ КАТАЛІТИЧНА АКТИВНІСТЬ У РОЗКЛАДІ ПЕРОКСИДУ ВОДНЮ
Cobalt oxides and/or manganese and their com-position based on cerium and zirconium oxides (CeO2 : ZrO2 = 1:1 mol.%) with a content of up to 20 wt. % are synthesized. Samples of both individual oxides and complex oxide compositions were prepared by precipitation from solutions of am-monia (room temp...
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| Дата: | 2019 |
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| Автори: | , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
V.I.Vernadsky Institute of General and Inorganic Chemistry
2019
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| Онлайн доступ: | https://ucj.org.ua/index.php/journal/article/view/99 |
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| Назва журналу: | Ukrainian Chemistry Journal |
Репозитарії
Ukrainian Chemistry Journal| id |
oai:ojs2.1444248.nisspano.web.hosting-test.net:article-99 |
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ojs |
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Ukrainian Chemistry Journal |
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2019-12-19T18:20:12Z |
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OJS |
| language |
English |
| topic_facet |
sol-gel synthesis complex oxide compositions oxides of cobalt manganese cerium zirconium solutions of ammonia and hexamethylenetetramine catalytic activity hydrogen peroxide. |
| format |
Article |
| author |
Pohorenko, Yuliia Omel’chuk, Anatoliy Ivanenko, Olexandr Pavlenko , Tamara |
| spellingShingle |
Pohorenko, Yuliia Omel’chuk, Anatoliy Ivanenko, Olexandr Pavlenko , Tamara СИНТЕЗ СКЛАДНООКСИДНИХ КОМПОЗИЦІЙ КОБАЛЬТУ–МАНГАНУ I ЦЕРІЮ–ЦИРКОНІЮ ТА ЇХ КАТАЛІТИЧНА АКТИВНІСТЬ У РОЗКЛАДІ ПЕРОКСИДУ ВОДНЮ |
| author_facet |
Pohorenko, Yuliia Omel’chuk, Anatoliy Ivanenko, Olexandr Pavlenko , Tamara |
| author_sort |
Pohorenko, Yuliia |
| title |
СИНТЕЗ СКЛАДНООКСИДНИХ КОМПОЗИЦІЙ КОБАЛЬТУ–МАНГАНУ I ЦЕРІЮ–ЦИРКОНІЮ ТА ЇХ КАТАЛІТИЧНА АКТИВНІСТЬ У РОЗКЛАДІ ПЕРОКСИДУ ВОДНЮ |
| title_short |
СИНТЕЗ СКЛАДНООКСИДНИХ КОМПОЗИЦІЙ КОБАЛЬТУ–МАНГАНУ I ЦЕРІЮ–ЦИРКОНІЮ ТА ЇХ КАТАЛІТИЧНА АКТИВНІСТЬ У РОЗКЛАДІ ПЕРОКСИДУ ВОДНЮ |
| title_full |
СИНТЕЗ СКЛАДНООКСИДНИХ КОМПОЗИЦІЙ КОБАЛЬТУ–МАНГАНУ I ЦЕРІЮ–ЦИРКОНІЮ ТА ЇХ КАТАЛІТИЧНА АКТИВНІСТЬ У РОЗКЛАДІ ПЕРОКСИДУ ВОДНЮ |
| title_fullStr |
СИНТЕЗ СКЛАДНООКСИДНИХ КОМПОЗИЦІЙ КОБАЛЬТУ–МАНГАНУ I ЦЕРІЮ–ЦИРКОНІЮ ТА ЇХ КАТАЛІТИЧНА АКТИВНІСТЬ У РОЗКЛАДІ ПЕРОКСИДУ ВОДНЮ |
| title_full_unstemmed |
СИНТЕЗ СКЛАДНООКСИДНИХ КОМПОЗИЦІЙ КОБАЛЬТУ–МАНГАНУ I ЦЕРІЮ–ЦИРКОНІЮ ТА ЇХ КАТАЛІТИЧНА АКТИВНІСТЬ У РОЗКЛАДІ ПЕРОКСИДУ ВОДНЮ |
| title_sort |
синтез складнооксидних композицій кобальту–мангану i церію–цирконію та їх каталітична активність у розкладі пероксиду водню |
| title_alt |
SYNTHESIS OF COMPLEX OXIDE COMPOSITIONS OF COBALT–MANGANESE AND CERIUM–ZIRCONIUM AND THEIR CATALYTIC ACTIVITY IN THE DECOMPOSITION OF HYDROGEN PEROXIDE СИНТЕЗ СЛОЖНООКСИДНЫХ КОМПОЗИЦИЙ КOБАЛЬТА–МАРГАНЦА И ЦЕРИЯ–ЦИРКОНИЯ, ИХ КАТАЛИТИЧЕСКАЯ АКТИВНОСТЬ ПРИ РАЗЛОЖЕНИИ ПЕРОКСИДА ВОДОРОДА |
| description |
Cobalt oxides and/or manganese and their com-position based on cerium and zirconium oxides (CeO2 : ZrO2 = 1:1 mol.%) with a content of up to 20 wt. % are synthesized. Samples of both individual oxides and complex oxide compositions were prepared by precipitation from solutions of am-monia (room temperature) or hexamethylenetet-ramine (80–90 °C) followed by heat treatment. Results of DTA show, that due to the calcination at 400 ° C (2 h), the obtained samples lose 17–22 wt. % corresponding to 2–3.8 molecules of water. According to the X-ray powder analysis, initially are formed hydroxide compounds of cobalt (CoO· xH2O) and manganese (MnO2·yН2О), which, after being heated at 400 °C for 2 hours, are converted into mixed oxides from the composition of Co3O4 and Mn3O4. The average particle size calculated by the Sherer equation is 18–30 nm.
In the study of catalytic activity on the example of the reaction of the hydrogen peroxide decomposition, it was found that the obtained samples from the solution of GMTA show a greater ability to catalytically decompose hydrogen peroxide compared to samples obtained from the ammonia solution. In this case, the catalytic activity of dried samples is twice as high as roasted, regardless of the method of obtaining. Samples of oxide compo-sitions with deposited 5–10 wt. % of Ce–Zr oxides (1:1) exhibit the highest ability to decompose H2O2. In this case, samples of compositions obtained from the solution of GMTA, have a prolonged catalytic action, and when precipitation in the solution of ammonia, the reaction takes place quite actively during 4–5 days.
Compositions formed from co-deposited or mechanically mixed hydroxocompounds of cobalt and manganese with 5 wt. % of CeO2–ZrO2 (1:1) deposited on them have different catalytic activity. In the case of mechanically mixed, it is 30% lower and with subsequent calcination at 400 °C, it is reduced by almost half, and with co-precipitation, the activity is quite high and does not change with heat treatment. In the case of obtaining samples of Co–Mn with Ce–Zr (1:1) deposited on them in excess of 10 wt. % the catalytic activity of the samples dried at 80 °C is equal to the activity of the co-deposited hydroxocompounds of cobalt and manganese and the calcination at 400 °C it reduces it by 30 %.
The best ability for catalysis was found in samples CoO·xH2O + 5 wt. % MnO2·yН2О, СоO×хН2О + 10 wt. % CeO2:ZrO2 and СоO×хН2О–MnO2×yН2О, precipitated with the GMTA solution and dried at 80 °C. The besser catalytic properties revealed a sample of СоО×хН2О + 10 wt. % CeO2:ZrO2, which with-out stirring is capable of decomposing 1.2–1.4 dm3/g of hydrogen peroxide with a rapid reaction and in the experiment the volume of H2O2 reacted was 3.4 dm3/g. |
| publisher |
V.I.Vernadsky Institute of General and Inorganic Chemistry |
| publishDate |
2019 |
| url |
https://ucj.org.ua/index.php/journal/article/view/99 |
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2025-09-24T17:43:33Z |
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oai:ojs2.1444248.nisspano.web.hosting-test.net:article-992019-12-19T18:20:12Z SYNTHESIS OF COMPLEX OXIDE COMPOSITIONS OF COBALT–MANGANESE AND CERIUM–ZIRCONIUM AND THEIR CATALYTIC ACTIVITY IN THE DECOMPOSITION OF HYDROGEN PEROXIDE СИНТЕЗ СЛОЖНООКСИДНЫХ КОМПОЗИЦИЙ КOБАЛЬТА–МАРГАНЦА И ЦЕРИЯ–ЦИРКОНИЯ, ИХ КАТАЛИТИЧЕСКАЯ АКТИВНОСТЬ ПРИ РАЗЛОЖЕНИИ ПЕРОКСИДА ВОДОРОДА СИНТЕЗ СКЛАДНООКСИДНИХ КОМПОЗИЦІЙ КОБАЛЬТУ–МАНГАНУ I ЦЕРІЮ–ЦИРКОНІЮ ТА ЇХ КАТАЛІТИЧНА АКТИВНІСТЬ У РОЗКЛАДІ ПЕРОКСИДУ ВОДНЮ Pohorenko, Yuliia Omel’chuk, Anatoliy Ivanenko, Olexandr Pavlenko , Tamara sol-gel synthesis, complex oxide compositions, oxides of cobalt, manganese, cerium, zirconium, solutions of ammonia and hexamethylenetetramine, catalytic activity, hydrogen peroxide. Cobalt oxides and/or manganese and their com-position based on cerium and zirconium oxides (CeO2 : ZrO2 = 1:1 mol.%) with a content of up to 20 wt. % are synthesized. Samples of both individual oxides and complex oxide compositions were prepared by precipitation from solutions of am-monia (room temperature) or hexamethylenetet-ramine (80–90 °C) followed by heat treatment. Results of DTA show, that due to the calcination at 400 ° C (2 h), the obtained samples lose 17–22 wt. % corresponding to 2–3.8 molecules of water. According to the X-ray powder analysis, initially are formed hydroxide compounds of cobalt (CoO· xH2O) and manganese (MnO2·yН2О), which, after being heated at 400 °C for 2 hours, are converted into mixed oxides from the composition of Co3O4 and Mn3O4. The average particle size calculated by the Sherer equation is 18–30 nm. In the study of catalytic activity on the example of the reaction of the hydrogen peroxide decomposition, it was found that the obtained samples from the solution of GMTA show a greater ability to catalytically decompose hydrogen peroxide compared to samples obtained from the ammonia solution. In this case, the catalytic activity of dried samples is twice as high as roasted, regardless of the method of obtaining. Samples of oxide compo-sitions with deposited 5–10 wt. % of Ce–Zr oxides (1:1) exhibit the highest ability to decompose H2O2. In this case, samples of compositions obtained from the solution of GMTA, have a prolonged catalytic action, and when precipitation in the solution of ammonia, the reaction takes place quite actively during 4–5 days. Compositions formed from co-deposited or mechanically mixed hydroxocompounds of cobalt and manganese with 5 wt. % of CeO2–ZrO2 (1:1) deposited on them have different catalytic activity. In the case of mechanically mixed, it is 30% lower and with subsequent calcination at 400 °C, it is reduced by almost half, and with co-precipitation, the activity is quite high and does not change with heat treatment. In the case of obtaining samples of Co–Mn with Ce–Zr (1:1) deposited on them in excess of 10 wt. % the catalytic activity of the samples dried at 80 °C is equal to the activity of the co-deposited hydroxocompounds of cobalt and manganese and the calcination at 400 °C it reduces it by 30 %. The best ability for catalysis was found in samples CoO·xH2O + 5 wt. % MnO2·yН2О, СоO×хН2О + 10 wt. % CeO2:ZrO2 and СоO×хН2О–MnO2×yН2О, precipitated with the GMTA solution and dried at 80 °C. The besser catalytic properties revealed a sample of СоО×хН2О + 10 wt. % CeO2:ZrO2, which with-out stirring is capable of decomposing 1.2–1.4 dm3/g of hydrogen peroxide with a rapid reaction and in the experiment the volume of H2O2 reacted was 3.4 dm3/g. V.I.Vernadsky Institute of General and Inorganic Chemistry 2019-12-16 Article Article Inorganic Chemistry Неорганическая химия Неорганічна хімія application/pdf https://ucj.org.ua/index.php/journal/article/view/99 10.33609/0041-6045.85.11.2019.15-27 Ukrainian Chemistry Journal; Vol. 85 No. 11 (2019): Ukrainian Chemistry Journal; 15-27 Украинский химический журнал; Том 85 № 11 (2019): Украинский химический журнал; 15-27 Український хімічний журнал; Том 85 № 11 (2019): Український хімічний журнал; 15-27 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/99/64 |