XPS Study of Metal-Support Interaction in Ru/MgO Catalyst for Low-Temperature Ammonia Synthesis | Sciact - CRIS-system of Boreskov Institute of Catalysis

XPS Study of Metal-Support Interaction in Ru/MgO Catalyst for Low-Temperature Ammonia Synthesis Full article

Conference

Catalysis for sustainable development : Russian-Dutch Workshop
22-26 Jun 2002 , Novosibirsk, Russia

Journal

Chemistry for Sustainable Development
ISSN: 1817-1818

Output data

Year: 2003, Volume: 11, Number: 1, Pages: 155-160 Pages count : 6

Authors

Larichev Y.V. ^1,2 , Moroz B.L. ² , Prosvirin I.P. ² , Likholobov V.A. ^1,2 , Bukhtiyarov V.I. ²

Affiliations

1	Novosibirsk State University, Ul. Pirogova 2, Novosibirsk 630090 (Russia)
2	G. K. Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Lavrentyeva 5, Novosibirsk 630090 (Russia)

Funding (3)

1	Russian Foundation for Basic Research	00-15-97447
2	Russian Foundation for Basic Research	02-03-32681
3	Президиум РАН	10.4

The catalytic system Ru/MgO has been characterized by TEM and XPS in the Ru 3d, Cl 2p and O1s regions. It was shown, that the treatment of the sample with H2 at 450 °Ñ leads to reduction of supported Ru (III, IV) chloride complexes to Ru metal crystallites of 2–5 nm in size (the surface atomic ratio Ru : Cl of reduced sample is 6.2). The shift of Ru 3d peak (279.5 eV) to lower bond energy (BE) found for Ru/MgO sample as compared with bulk Ru metal (280.2 eV) is proved to be due to the differential charging effect. The value of this effect was estimated by a comparison of the valence band spectrum of supported Ru particles with that of bulk Ru. Taking the differential charging into account, the "true" value BE of Ru 3d5/2 (280.5 eV) was determined. The shift of Ru 3d peak towards the higher BE values may indicate the electron-withdrawing effect of MgO surface to supported Ru particles.

Larichev Y.V. , Moroz B.L. , Prosvirin I.P. , Likholobov V.A. , Bukhtiyarov V.I.
XPS Study of Metal-Support Interaction in Ru/MgO Catalyst for Low-Temperature Ammonia Synthesis
Chemistry for Sustainable Development. 2003. V.11. N1. P.155-160. РИНЦ

Larichev Y.V. , Moroz B.L. , Prosvirin I.P. , Likholobov V.A. , Bukhtiyarov V.I.
XPS Study of Metal-Support Interaction in Ru/MgO Catalyst for Low-Temperature Ammonia Synthesis
Химия в интересах устойчивого развития. 2003. V.11. N1. P.155-160. РИНЦ ANCAN

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