Structure of Catalytically Active Gold Nanoparticles by XAFS Spectroscopy | Sciact - CRIS-система Института катализа

Structure of Catalytically Active Gold Nanoparticles by XAFS Spectroscopy Научная публикация

Конференция

14th International Conference on X-Ray Absorption Fine Structure
26-31 июл. 2009 , Camerino

Журнал

Journal of Physics: Conference Series
ISSN: 1742-6588 , E-ISSN: 1742-6596

Вых. Данные

Год: 2009, Том: 190, Номер статьи : 012121, Страниц : 4 DOI: 10.1088/1742-6596/190/1/012121

Ключевые слова

K-SPECTRA; Au; OXYGEN; SIZE

Авторы

Erenburg S ¹ , Trubina S ¹ , Bausk N.V. ¹ , Moroz B ² , Kalinkin A ² , Bukhtiyarov V ² , Nikitenko S ³

Организации

1	Nikolaev Institute of Inorganic Chemistry, SB RAS, Lavrentiev ave.3, Novosibirsk 630090, Russia
2	Boreskov Institute of Catalysis SB RAS, Lavrentiev ave. 5, Novosibirsk 630090, Russia
3	NOSR (NOW), DUBBLE at ESRF, BP 220, 38043 Grenoble CEDEX 9, France

Информация о финансировании (1)

Сибирское отделение Российской академии наук

A series of Au/Al2O3 catalysts prepared by the different procedures and series of model system Au/Si(100), Au/Si(111) differing in the mean Au particle sizes (from 2 nm up to 30 nm) were studied by EXAFS and XANES techniques. No visible changes in electron states of Au for all samples prepared by different methods in comparison with bulk material were detected. Oxygen atoms were not detected around Au atoms within the detection limits of our study (a few per cents of surrounding atoms). A gradual reduction of the Au-Au bond length and first shell Au-Au coordination number and an increase in the Debye-Waller factor are observed as the size of supported Au particles decreases. The significant increase of structural disorder for the smallest Au particles comparatively to the bulk Au metal and sizeable particles was detected. These variations in micro-structural parameters of Au nanoparticles are in line with an increase in their catalytic activity in CO oxidation. For model systems some coordination of Au- atoms from islands and Si- atoms from crystal surface was detected for thin Au "films".

Erenburg S. , Trubina S. , Bausk N.V. , Moroz B. , Kalinkin A. , Bukhtiyarov V. , Nikitenko S.
Structure of Catalytically Active Gold Nanoparticles by XAFS Spectroscopy

Journal of Physics: Conference Series. 2009. V.190. 012121 :1-4. DOI: 10.1088/1742-6596/190/1/012121 WOS Scopus РИНЦ CAPlusCA OpenAlex

Полный текст от издателя

Опубликована в печати:	1 нояб. 2009 г.
Опубликована online:	5 нояб. 2009 г.

Web of science:	WOS:000275152100122
Scopus:	2-s2.0-73449100127
РИНЦ:	15299487
Chemical Abstracts:	2009:1417025
Chemical Abstracts (print):	152:272384
OpenAlex:	W2104235694

БД	Цитирований
Web of science	6
Scopus	7
РИНЦ	9
OpenAlex	6