Highly Active PdCeOx Composite Catalysts for Low-Temperature CO Oxidation, Prepared by Plasma-Arc Synthesis | Sciact - CRIS-система Института катализа

Highly Active PdCeOx Composite Catalysts for Low-Temperature CO Oxidation, Prepared by Plasma-Arc Synthesis Научная публикация

Журнал

Applied Catalysis B: Environmental
ISSN: 0926-3373 , E-ISSN: 1873-3883

Вых. Данные

Год: 2014, Том: 147, Страницы: 132-143 Страниц : 12 DOI: 10.1016/j.apcatb.2013.08.043

Ключевые слова

Arc-plasma, Low-temperature CO oxidation, Pd/CeO2 catalyst, TEM, XPS

Авторы

Gulyaev R.V. ¹ , Slavinskaya E.M. ¹ , Novopashin S.A. ² , Smovzh D.V. ² , Zaikovskii A.V. ² , Osadchii D.Yu. ⁴ , Bulavchenko O.A. ¹ , Korenev S.V. ^3,4 , Boronin A.I. ^1,4

Организации

1	Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russian Federation
2	Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russian Federation
3	Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk, Russian Federation
4	Novosibirsk State University, Novosibirsk, Russian Federation

Информация о финансировании (2)

1	Сибирское отделение Российской академии наук	124
2	Министерство образования и науки Российской Федерации	8646

The plasma-arc method was adapted for the synthesis of composite palladium–ceria catalysts, which were utilized for the low-temperature oxidation of carbon monoxide. The Pd/CeO2 catalysts were synthesized in two steps: step 1 – direct synthesis of palladium–cerium–carbon composite PdCeC in the plasma-arc chamber, and step 2 – calcination of the composite with carbon burnout in air at 600, 700, and 800 °C. Catalytic testing using temperature-programmed reaction demonstrated the high efficiency of the synthesized catalysts during the oxidation of carbon monoxide and their ability to oxidize CO at temperatures as low as room temperature. In comparison with a catalyst that had similar morphology and palladium content but was prepared by coprecipitation, the synthesized catalyst showed that the calculated TOF value for the composite catalyst was two–three times higher than that of the catalyst prepared by chemical methods. A variety of physical methods (HRTEM, XRD, XPS, Raman spectroscopy and others) were used to examine the microstructure, composition and electronic state of the composite components in detail after the high-temperature calcination stage of catalyst synthesis. It was shown that high catalytic activity was provided by the formation of a high-defect fluorite structure of PdCeOx solid solution and highly dispersed PdOx nanoparticles. The XPS data suggest that carbon nanostructures mixed with palladium and cerium in the initial PdCeC composite prevent sintering during high-temperature calcination and play a key role in the formation of a high-defect solid solution of palladium in the CeO2 structure, which has a high concentration of Ce3+ and oxygen vacancies.

Gulyaev R.V. , Slavinskaya E.M. , Novopashin S.A. , Smovzh D.V. , Zaikovskii A.V. , Osadchii D.Y. , Bulavchenko O.A. , Korenev S.V. , Boronin A.I.
Highly Active PdCeOx Composite Catalysts for Low-Temperature CO Oxidation, Prepared by Plasma-Arc Synthesis
Applied Catalysis B: Environmental. 2014. V.147. P.132-143. DOI: 10.1016/j.apcatb.2013.08.043 WOS Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	18 июн. 2013 г.
Принята к публикации:	26 авг. 2013 г.
Опубликована online:	1 сент. 2013 г.
Опубликована в печати:	5 апр. 2014 г.

Web of science:	WOS:000330489400016
Scopus:	2-s2.0-84884584963
РИНЦ:	20628603
Chemical Abstracts:	2013:1970967
Chemical Abstracts (print):	160:121404
OpenAlex:	W2000954541

БД	Цитирований
Web of science	117
Scopus	125
РИНЦ	123
OpenAlex	124