Revealing Electronic Influences in the Semihydrogenation of Acetylene
| Autor: | Yuri Grin, Marc Armbrüster, Oksana Matselko, Alim Ormeci, Ulrich Burkhardt, Roman Gladyshevskii, René Zimmermann |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Intermetallic chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Heterogeneous catalysis 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Catalysis chemistry.chemical_compound General Energy X-ray photoelectron spectroscopy chemistry Acetylene Formula unit Physical chemistry Physical and Theoretical Chemistry 0210 nano-technology Tin Solid solution |
| Zdroj: | The Journal of Physical Chemistry C. 122:21891-21896 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | The electronic influence on the catalytic properties in the semihydrogenation of acetylene is addressed by applying unsupported intermetallic materials from the solid solution Ga1–xSnxPd2 (0 ≤ x ≤ 1). Due to the only marginal changes in the crystal structure, the whole series shows excellent selectivity to ethylene (∼85%) comparable with the binary GaPd2. Moreover, the incremental addition of up to one electron per formula unit reveals a maximum in the specific catalytic activity around the nominal composition with x = 0.28 corresponding to 4.0 atom % tin in the near-surface region, as revealed by operando X-ray photoelectron spectroscopy measurements. The study shows a reliable and quantitative relation between the d-band shift and catalytic activity, revealing once more the potential of intermetallic compounds in heterogeneous catalysis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|