|
|||||
|
|
The catalytic reduction of NO by H2 on Ru(0 0 0 1): Observation of NHads species |
|
| Authors: | A Hornung M Muhler |
| Institution: | a Ruhr-Universität Bochum, D-44780 Bochum, Germany b Materials and Surface Science Institute, Department of Physics, University of Limerick, Limerick, Ireland c Fritz-Haber-Institut der Max-Planck-Gesellschaft, D-14195 Berlin, Germany |
| Abstract: | Adsorption of NO and the reaction between NO and H2 were investigated on the Ru(0 0 0 1) surface by X-ray photoelectron spectroscopy (XPS). Surface composition was measured after NO adsorption and after the selective catalytic reduction of nitric oxide with hydrogen in steady-state conditions at 320 K and 390 K in a 30:1 mixture of H2 and NO (total pressure = 10−4 mbar). After steady-state NO reduction, molecularly adsorbed NO in both the linear on-top and threefold coordinations, NHads and Nads species were identified by XPS. The coverage of the NHads and Nads species was higher after the reaction at 390 K than the corresponding values at 320 K. Strong destabilisation of Nads by Oads was detected. A possible reaction mechanism is discussed. |
| Keywords: | X-ray photoelectron spectroscopy Surface chemical reaction Adsorption Ruthenium Nitrogen oxides Low index single crystal surfaces NO reduction DeNOx |
| 本文献已被 ScienceDirect 等数据库收录！ | |