Are Au Nanoparticles on Oxygen-Free Supports Catalytically Active? | Sciact

Are Au Nanoparticles on Oxygen-Free Supports Catalytically Active? Научная публикация

Журнал

Topics in Catalysis
ISSN: 1022-5528 , E-ISSN: 1572-9028

Вых. Данные

Год: 2016, Том: 59, Номер: 5-7, Страницы: 469-477 Страниц : 9 DOI: 10.1007/s11244-015-0528-0

Авторы

Klyushin Alexander Yu. ¹ , Arrigo Rosa ¹ , Youngmi Yi ¹ , Xie Zailai ¹ , Hävecker Michael ^1,2 , Bukhtiyarov Andrey V. ^3,4 , Prosvirin Igor P. ^3,4 , Bukhtiyarov Valerii I. ^3,4 , Knop-Gericke Axel ¹ , Schlögl Robert ¹

Организации

1	Fritz-Haber-Institute der Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
2	Division Solar Energy Research, Helmholtz-Zentrum Berlin fur Materialien und Energie GmbH, Albert-Einstein-Str. 15, 12489 Berlin, Germany
3	Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russia
4	Novosibirsk State University, Piragova str. 2, Novosibirsk 630090, Russia

Gold nanoparticles (Au NPs) on oxygen-free supports were examined using near ambient pressure X-ray photoelectron spectroscopy under CO oxidation conditions, and ex situ using scanning electron microscopy and transmission electron microscopy. Our observations demonstrate that Au NPs supported on carbon materials are inactive, regardless of the preparation method. Ozone (O3) treatment of carbon supports leads oxygen-functionalization of the supports. When subsequently exposed to a CO feed, CO is oxidized by the functionalized sites of the carbon support via a stoichiometric pathway. Microscopy reveals that the reaction with CO does not change the morphology of the Au NPs. In situ XPS reveals that the O3 treatment gives rise to additional Au 4f and O 1s peaks at binding energies of 85.25–85.6 and 529.4–530 eV, respectively, which are assigned to the presence of Au oxide. A surface oxide phase is formed during the activation of Au NPs supported on Au foil by O3 treatment. However, this phase decomposes in vacuum and the remaining low-coordinative atoms do not have sufficient catalytic properties to oxidize CO, so the size reduction of Au NPs and/or oxidation of Au NPs is not sufficient to activate Au.

Klyushin A.Y. , Arrigo R. , Youngmi Y. , Xie Z. , Hävecker M. , Bukhtiyarov A.V. , Prosvirin I.P. , Bukhtiyarov V.I. , Knop-Gericke A. , Schlögl R.
Are Au Nanoparticles on Oxygen-Free Supports Catalytically Active?

Topics in Catalysis. 2016. V.59. N5-7. P.469-477. DOI: 10.1007/s11244-015-0528-0 WOS Scopus РИНЦ CAPlusCA OpenAlex Sciact

Полный текст от издателя

Опубликована online:	11 янв. 2016 г.
Опубликована в печати:	1 мар. 2016 г.

Web of science:	WOS:000371424800006
Scopus:	2-s2.0-84959513311
РИНЦ:	26981516
Chemical Abstracts:	2016:61004
Chemical Abstracts (print):	164:294070
OpenAlex:	W2239627675
Sciact:	8995

БД	Цитирований
Scopus	18
OpenAlex	22