Coadsorption of nitric oxide and oxygen on the Ag(110) surface

Bao, Xinhe; Wild, Ute; Mühler, Martin; Pettinger, Bruno; Schlögl, Robert; Ertl, G.

doi:10.1016/s0039-6028(99)00190-9

Cited by 44 publications

(25 citation statements)

References 23 publications

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“…Based on the experimental results on distribution of 14 N and 15 N in nitrogen and nitrous oxide [10], it is concluded that NO cannot be effectively decomposed over reduced Ag species with formation of N 2 , N 2 O and active oxygen species. This statement is supported by previous surface science studies [26,27], which reported low activity of metallic silver for NO dissociation. More typical for this metal, especially in the presence of oxygen, is the formation of NO 2 and NO 3 surface species.…”

Section: Mechanistic Aspects Of the Nh 3 -Scr Reaction In The Absencesupporting

confidence: 85%

Mechanistic aspects of N2O and N2 formation in NO reduction by NH3 over Ag/Al2O3: The effect of O2 and H2

Kondratenko

Bentrup

Richter

et al. 2008

Applied Catalysis B: Environmental

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A mechanistic scheme of N 2 O and N 2 formation in the selective catalytic reduction of NO with NH 3 (NH 3 -SCR) over a Ag/Al 2 O 3 catalyst in the presence and absence of H 2 and O 2 was developed by applying a combination of different techniques: transient experiments with isotopic tracers in the temporal analysis of products (TAP) reactor, HRTEM, in situ UV/vis and in situ FTIR spectroscopy. Based on the results of transient isotopic analysis and in situ IR experiments, it is suggested that N 2 and N 2 O are formed via direct or oxygen-induced decomposition of surface NH 2 NO species. These intermediates originate from NO and surface NH 2 fragments. The latter NH 2 species are formed upon stripping of hydrogen from ammonia by adsorbed oxygen species, which are produced over reduced silver species from NO, N 2 O and O 2 . The latter is the dominant supplier of active oxygen species. Lattice oxygen in oxidized AgO x particles is less active than adsorbed oxygen species particularly below 623 K. The previously reported significant diminishing of N 2 O production in the presence of H 2 is ascribed to hydrogen-induced generation of metallic silver sites, which are responsible for N 2 O decomposition.

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Section: Mechanistic Aspects Of the Nh 3 -Scr Reaction In The Absencesupporting

confidence: 85%

Mechanistic aspects of N2O and N2 formation in NO reduction by NH3 over Ag/Al2O3: The effect of O2 and H2

Kondratenko

Bentrup

Richter

et al. 2008

Applied Catalysis B: Environmental

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“…13), which causes the further increase of the sensor resistance. The molecular-level mechanism for the NO chemisorption has not yet been clearly revealed, but it is clear that the reactions extract electrons from the WO 3 nanowire, and the reactions are [43,54,55], …”

Section: Resultsmentioning

confidence: 99%

NO sensing by single crystalline WO3 nanowires

Cai

Yang

et al. 2015

Sensors and Actuators B: Chemical

118

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“…Conversely, the photoemission feature for Au(997) attenuates. The 3 peaks at 8.5, 9.9, and 12.6 eV below the Fermi level are similar to the valence band peaks of NO(a) coadsorbed with O(a) on Ag(111) [37], W(110) [38], and Ag(110) [41] as measured by ultraviolet photoelectron spectroscopy but are completely different from the valence band peaks of NO 2 (a) [37,38]. Therefore, the 3 observed photoemission peaks at 12.6, 9.9 and 8.5 eV below the Fermi level may be assigned to the 4σ, 5σ and 1π molecular orbitals of NO(a) on Au(997), respectively.…”

Section: Resultsmentioning

confidence: 53%

Generating oxygen adatoms on Au(997) by thermal decomposition of NO2

Zhang

Chen

et al. 2010

Chin. Sci. Bull.

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We report our investigation of the interaction of NO 2 with the Au(997) vicinal surface by high-resolution photoelectron spectroscopy using synchrotron radiation as the excitation source. At 170 K, both core-level and valence-band photoemission results illustrate the decomposition of NO 2 on the Au(997) surface at low NO 2 exposures, forming coadsorbed NO(a) and O(a) species. After annealing at 300 K, NO(a) desorbs from Au (997) whereas O(a) remains on the surface. Upon annealing at 750 K, we observe no signal for adsorbed oxygen on Au(997). These results clearly demonstrate that thermal decomposition of NO 2 is an effective method to generate oxygen adatoms on Au(997) under ultrahigh-vacuum conditions. Au(997) vicinal surface, atomic oxygen, synchrotron-radiation photoelectron spectroscopy Citation:Zhang Y L, Wu Z F, Chen B H, et al. Generating oxygen adatoms on Au(997) by thermal decomposition of NO 2 .

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Coadsorption of nitric oxide and oxygen on the Ag(110) surface

Cited by 44 publications

References 23 publications

Mechanistic aspects of N2O and N2 formation in NO reduction by NH3 over Ag/Al2O3: The effect of O2 and H2

Mechanistic aspects of N2O and N2 formation in NO reduction by NH3 over Ag/Al2O3: The effect of O2 and H2

NO sensing by single crystalline WO3 nanowires

Generating oxygen adatoms on Au(997) by thermal decomposition of NO2

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