without changing your settings we'll assume you are happy to receive all RSC cookies.
You can change your cookie settings by navigating to our Privacy and Cookies page and following the instructions. These instructions
are also obtainable from the privacy link at the bottom of any RSC page.
Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, HCI E 125, Wolfgang-Pauli-Strasse 10, Zurich, Switzerland
; Fax: +41 44 633 14 05
; Tel: +41 44 633 71 20
Fritz-Haber Institute of the Max Planck Society, Department of Inorganic Chemistry, Faradayweg 4–6, Berlin, Germany
; Fax: +49 30 8413 4676
; Tel: +49 30 8413 5408
Chem. Sci., 2011,2, 1379-1383
01 Feb 2011,
07 Apr 2011
First published online
13 May 2011
In partial hydrogenation of highly unsaturated compounds, high-performance heterogeneous catalysts usually consist of multi-metallic systems providing enhanced selectivity. These materials often undergo complex segregation phenomena and to understand their function, a surface-sensitive in situ methodology is crucial. Recently, we reported a novel family of ternary Cu–Ni–Fe catalysts for propynehydrogenation with exceptional selectivity to propene. Herein, we detail our study on the surface composition and electronic state of two representative samples (Cu2.75Ni0.25Fe and Cu3Fe) using in situ X-ray photoelectron (XPS) and X-ray absorption (XAS) spectroscopies. Surface segregation phenomena during activation of the catalyst precursors (calcination and reduction) and hydrogenation reaction were evaluated. The multiple functions of nickel in the catalyst, which account for the extraordinary alkene selectivity, are unravelled.
Fetching data from CrossRef. This may take some time to load.