Ammonia Oxidation over a Pt25Rh75(001) Model Catalyst Surface : An Operando Study
(2020) In Journal of Physical Chemistry C 124(40). p.22192-22199- Abstract
The ammonia oxidation reaction over a PtRh binary alloy has been studied with a surface science approach by operando techniques such as near-ambient pressure X-ray photoemission spectroscopy (NAP-XPS) and surface X-ray diffraction (SXRD) combined with mass spectrometry. The article will explore the surface evolution across five different oxygen to ammonia ratios in the millibar regime for two different temperatures. The presented data set allows us to link variations in the atomic structures measured by diffraction methods and surface species information from NAP-XPS to reaction products in the gas phase. We will show that NO production coincides with significant changes of the surface structure and the formation of a RhO2 surface... (More)
The ammonia oxidation reaction over a PtRh binary alloy has been studied with a surface science approach by operando techniques such as near-ambient pressure X-ray photoemission spectroscopy (NAP-XPS) and surface X-ray diffraction (SXRD) combined with mass spectrometry. The article will explore the surface evolution across five different oxygen to ammonia ratios in the millibar regime for two different temperatures. The presented data set allows us to link variations in the atomic structures measured by diffraction methods and surface species information from NAP-XPS to reaction products in the gas phase. We will show that NO production coincides with significant changes of the surface structure and the formation of a RhO2 surface oxide. It was also observed that the RhO2 surface oxide only fully forms when the nitrogen signal in the N1s has disappeared.
(Less)
- author
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Physical Chemistry C
- volume
- 124
- issue
- 40
- pages
- 8 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:85096570651
- ISSN
- 1932-7447
- DOI
- 10.1021/acs.jpcc.0c07128
- language
- English
- LU publication?
- yes
- id
- dd1d4acb-500a-4bc2-9315-7057249e0bd8
- date added to LUP
- 2020-12-07 12:50:06
- date last changed
- 2023-12-19 10:55:36
@article{dd1d4acb-500a-4bc2-9315-7057249e0bd8,
abstract = {{<p>The ammonia oxidation reaction over a PtRh binary alloy has been studied with a surface science approach by operando techniques such as near-ambient pressure X-ray photoemission spectroscopy (NAP-XPS) and surface X-ray diffraction (SXRD) combined with mass spectrometry. The article will explore the surface evolution across five different oxygen to ammonia ratios in the millibar regime for two different temperatures. The presented data set allows us to link variations in the atomic structures measured by diffraction methods and surface species information from NAP-XPS to reaction products in the gas phase. We will show that NO production coincides with significant changes of the surface structure and the formation of a RhO2 surface oxide. It was also observed that the RhO2 surface oxide only fully forms when the nitrogen signal in the N1s has disappeared.</p>}},
author = {{Resta, Andrea and Hejral, Uta and Blomberg, Sara and Albertin, Stefano and Vlad, Alina and Garreau, Yves and Chatelier, Corentin and Venturini, Federica and Ferrer, Pilar and Held, Georg and Grinter, Dave and Lundgren, Edvin and Coati, Alessandro}},
issn = {{1932-7447}},
language = {{eng}},
number = {{40}},
pages = {{22192--22199}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Journal of Physical Chemistry C}},
title = {{Ammonia Oxidation over a Pt<sub>25</sub>Rh<sub>75</sub>(001) Model Catalyst Surface : An Operando Study}},
url = {{http://dx.doi.org/10.1021/acs.jpcc.0c07128}},
doi = {{10.1021/acs.jpcc.0c07128}},
volume = {{124}},
year = {{2020}},
}