vestichИзвестия Национальной академии наук Беларуси. Серия химических наукProceedings of the National Academy of Sciences of Belarus, Chemical Series1561-83312524-2342The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"10.29235/1561-8331-2023-59-1-7-17vestich-784Research ArticleФИЗИЧЕСКАЯ ХИМИЯPHYSICAL CHEMISTRYВлияние содержания воды и условий хранения на активность PdCuFeсодержащего углеволокнистого катализатора низкотемпературного окисления СОEffect of water content and storage conditions on the activity of PdCuFe-containing fibrous carbon catalyst for low-temperature CO oxidationХаминецС. Г.KhaminetsS. G.

Хаминец Сергей Георгиевич – канд. хим. наук, науч.сотрудник

ул. Сурганова, 13, 220072, Минск

Khaminets Siarhei G. – Ph. D. (Chemistry), Researcher

13, Surganov str., 220072, Minsk

holyfreezer@gmail.comМатвейчукС. В.MatveichukS. V.

Матвейчук Сергей Васильевич – канд. хим. наук,вед. науч. сотрудник

ул. Сурганова, 13, 220072, Минск

Matveichuk Siarhei V. – Ph. D. (Chemistry), LeadingResearcher

13, Surganov str., 220072, Minsk

msv@ifoch.bas-net.byТычинскаяЛ. Ю.TychinskayaL. Yu.

Тычинская Людмила Юльевна – канд. хим. наук, зав.лаб

ул. Сурганова, 13, 220072, Минск

Tychinskaya Lyudmila Y. – Ph. D. (Chemistry), Headof the Laboratory

13, Surganov str., 220072, Minsk

sed@ifoch.bas-net.byИнститут физико-органической химии Национальной академии наук БеларусиInstitute of Physical Organic Chemistry of the National Academy of Sciences of Belarus202305032023591717Copyright © Хаминец С.Г., Матвейчук С.В., Тычинская Л.Ю., 20232023Хаминец С.Г., Матвейчук С.В., Тычинская Л.Ю.Khaminets S.G., Matveichuk S.V., Tychinskaya L.Y.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestichem.belnauka.by/jour/article/view/784

Исследовано влияние содержания воды и условий хранения на активность каталитической системы низкотемпературного окисления СО, полученной пропиткой углеволокнистой ткани Бусофит ЭХО водным раствором солей палладия, меди и железа. С применением методов РФА, РФЭС, СЭМ и ГХ изучены физико-химические свойства катализатора. Определено оптимальное содержание воды в катализаторе, при котором обеспечивается эффективная очистка воздуха как при малой (0,03 об.%), так и высокой (0,5 об.%) концентрации СО в воздухе и высокой влажности газовоздушной смеси (70 %). Установлено, что дезактивация катализатора при хранении на воздухе обусловлена накоплением избыточного количества воды в катализаторе и реорганизацией активной фазы: уменьшением содержания палладия в приповерхностном слое катализатора и сегрегацией фазы атакамита Сu2Cl(OH)3. Сушка катализатора после хранения на воздухе при 110 оС приводит к его полной реактивации. Показано, что при герметичной упаковке свежеприготовленных или просушенных после опыта при 50 оС образцов исходная каталитическая активность сохраняется при длительном хранении (более года).

Effect of water content and storage conditions on the activity of carbon fiber supported palladium-copper-iron containing catalyst was studied. Physical-chemical properties of catalytic system were examined by means of XRD, XPS, SEM and GCh. The optimal water content in the catalyst, which ensures the most effective air purification both at low (0,03 vol.%) and high (0,5 vol.%) CO concentrations in the air and high humidity (70 %) of gas mixture, was determined.

Activity loss of the catalytic system after storage under air conditions (1 month) was attributed to the accumulation of the excess amount of water in the catalyst and reorganization of its the active phase – decrease in the palladium content in the near-surface layer and segregation of the Сu2Cl(OH)3 atacamite phase. Catalyst drying in air at 110 оС leads to its complete reactivation. Hermetically sealed freshly as-prepared and dried at 50 оС after experiment samples retain the initial catalytic activity during long-term (more than a year) storage.

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