Cu-CeO2 nanocomposites: mechanochemical synthesis, physico-chemical properties, CO-PROX activity / Borchers Christine,Martin May L.,Vorobjeva Galina A.,Morozova Olga S.,Firsova Alla A.,Leonov Alexander V.,Kurmaev Ernst Z.,Kukharenko Andrey I.,Zhidkov Ivan S.,Cholakh Seif O. // JOURNAL OF NANOPARTICLE RESEARCH. - 2016. - V. 18, l. 11.

ISSN/EISSN:

1388-0764 / 1572-896X

Type:

Article

Abstract:

Catalytic systems designated for preferential oxidation of CO in the presence of H-2 are prepared by ball milling of Cu and CeO2, a simple and cheap onestep process to synthesize such catalysts. It is found that after 60 min of milling, a mixture of 8 wt.\% Cu-CeO2 powders exhibits CO conversion of 96\% and CO selectivity of about 65\% at 438 K. Two active oxygen states, which are not observed in case of pure CeO2, were detected in the nanocomposite lattice and attributed to the presence of Cu in surface sites as well as in subsurface bulk sites. Correspondingly, oxidation of CO to CO2 was found to occur in a two-stage process with T-max approximate to 395/460 K, and oxidation of H-2 to H2O likewise in a two-stage process with T-max approximate to 465/490 K. The milled powder consists of CeO2 crystallites sized 810 nm agglomerated to somewhat larger aggregates, with Cu dispersed on the surface of the CeO2 crystallites, and to a lesser extent present as Cu2O.

Author keywords:

Preferential oxidation of CO; Copper-ceria catalysts; High-resolution electron microscopy; X-ray photoelectron spectroscopy; Mechanochemical synthesis WATER-GAS SHIFT; PREFERENTIAL OXIDATION; CATALYTIC PERFORMANCE; CUO/CEO2 CATALYSTS; CARBON-MONOXIDE; DOPED CERIA; EXCESS H-2; COPPER; CU; OXIDES

DOI:

10.1007/s11051-016-3640-6

Web of Science ID:

ISI:000390063800003

Соавторы в МНС:

Другие поля

Поле	Значение
Month	NOV 19
Publisher	SPRINGER
Address	VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
Language	English
EISSN	1572-896X
Keywords-Plus	WATER-GAS SHIFT; PREFERENTIAL OXIDATION; CATALYTIC PERFORMANCE; CUO/CEO2 CATALYSTS; CARBON-MONOXIDE; DOPED CERIA; EXCESS H-2; COPPER; CU; OXIDES
Research-Areas	Chemistry; Science \& Technology - Other Topics; Materials Science
Web-of-Science-Categories	Chemistry, Multidisciplinary; Nanoscience \& Nanotechnology; Materials Science, Multidisciplinary
Author-Email	chris@ump.gwdg.de
ResearcherID-Numbers	Zhidkov, Ivan/L-3543-2013 Kurmaev, Ernst/J-4254-2013
ORCID-Numbers	Zhidkov, Ivan/0000-0001-8727-4730 Kurmaev, Ernst/0000-0003-4625-4930 Cholakh, Seif/0000-0002-9313-6614
Funding-Acknowledgement	Russian Foundation for Basic Research {[}16-03-00178, 16-03-00330]; program P-16 of Presidium of RAS, Government of the Russian Federation {[}02.A03.21.0006]; Ministry of Education and Science of Russian Federation {[}RFMEFI 58714X0002]; Alexander von Humboldt foundation
Funding-Text	This work was partially supported by the Russian Foundation for Basic Research Projects. 16-03-00178 and 16-03-00330, program P-16 of Presidium of RAS, Government of the Russian Federation (act 211 and agreement. 02.A03.21.0006). The XPS measurements were supported by the Ministry of Education and Science of Russian Federation (Project RFMEFI 58714X0002). The Alexander von Humboldt foundation is gratefully acknowledged for funding of this work.
Number-of-Cited-References	45
Usage-Count-Last-180-days	13
Usage-Count-Since-2013	39
Journal-ISO	J. Nanopart. Res.
Doc-Delivery-Number	EF1CX