In situ high-resolution XPS studies on adsorption of NO on Pt( 111 )

Zhu, Junfa; Kinne, M.; Fuhrmann, Thomas; Denecke, R.; Steinrück, Hans‐Peter

doi:10.1016/s0039-6028(03)00298-x

Cited by 78 publications

(101 citation statements)

References 48 publications

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“…Accordingly, two different adsorption sites were introduced in the model, sites "a" (O, N and NO) and sites "b" (NH 3 ). Assigning the same adsorption site for oxygen and nitric oxide results in site competition between O and NO, which is also supported by spectroscopic evidence [72,73].…”

Section: Model Csupporting

confidence: 56%

Kinetics of ammonia oxidation over Pt foil studied in a micro-structured quartz-reactor

Kraehnert

Baerns

2008

Chemical Engineering Journal

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The kinetics of Pt-catalyzed ammonia oxidation on polycrystalline Pt were investigated at partial pressures of ammonia and oxygen up to 6 kPa and temperatures between 286 and 385• C, applying a micro-structured reactor that ascertained temperature control of the exothermic reaction. Using literature-based mechanistic models, a micro-kinetic model was derived based on parameter optimization and a model discrimination procedure. The model described the rates of formation of all nitrogen-containing products, i.e. N 2 , N 2 O and NO. Catalyst characterization of platinum samples by electron microscopy indicated that reaction-induced restructuring of the Pt surface limited the accuracy of derived kinetic parameters already at the low temperature applied in this work. Despite of necessary simplifications, the best-fitting kinetic model predicted reasonable product selectivities for the reaction conditions of an industrial ammonia burner.

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Section: Model Csupporting

confidence: 56%

Kinetics of ammonia oxidation over Pt foil studied in a micro-structured quartz-reactor

Kraehnert

Baerns

2008

Chemical Engineering Journal

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“…NO coverage for each type of the sites-fcc, atop, and hcp-was almost the same (0.23-0.26) for the saturated adsorption surface, a result that was consistent with that for the (2 9 2)-3NO structure reported as a saturated adsorption structure of NO on Rh(111) [13]. NO has been reported to adsorb on a Pt(111) surface at the fcc, atop, and hcp sites in that order [51,52]. Thus, the NO adsorption process on Rh(111) was similar to that on Pt(111) but was significantly different from that on Ir(111) shown in Fig.…”

Section: Adsorption and Decomposition Of No On Rh(111)supporting

confidence: 86%

Adsorption Behavior and Reaction Properties of NO and CO on Ir(111) and Rh(111)

Nakamura

Fujitani

2009

Catal Surv Asia

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Adsorption and reactions of NO over the clean and and Rh(111) surfaces were investigated using infrared reflection absorption spectroscopy (IRAS) and temperature programmed desorption (TPD). Two NO adsorption states, indicative of hollow and atop sites, were present on Ir(111). Only NO adsorbed on hollow sites dissociated to N a and O a . The dissociated N a desorbed as N 2 by recombination of N a and by a disproportionation reaction between atop-NO and N a . Preadsorbed CO inhibited atop-NO, whereas hollow-NO was not affected. Adsorbed CO reacted with O a and desorbed as CO 2 . NO adsorbed on the fcc-hollow, atop, and hcp-hollow sites in that order over Rh(111). The hcp-NO was inhibited by preadsorbed atop-CO, and fcc-NO and atop-NO were inhibited by CO preadsorbed on each type of the sites, indicating that NO and CO competitively adsorbed on Rh(111). From the Rh(111) surface-coadsorbed NO and CO, N 2 was produced by fcc-NO dissociation, and CO 2 was formed by reaction of adsorbed CO with O a from dissociated fcc-NO.

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“…It was cleaned, until no impurities could be detected by XPS and a sharp Pt(111)-(1×1) LEED pattern was obtained, by several cycles of Ar + -ion sputtering, annealing at 800 K in an O 2 environment to remove carbon, and then flashing to 1300 K to remove oxygen [14]. The sample temperature was monitored by a calibrated infrared pyrometer.…”

Section: Methodsmentioning

confidence: 99%

Epitaxial growth of ultrathin ZrO2(111) films on Pt(111)

et al. 2011

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Ordered epitaxial ZrO 2 films were grown on Pt(111) and characterized by low energy electron diffraction (LEED), synchrotron radiation photoemission spectroscopy (SRPES) and X-ray photoelectron spectroscopy (XPS). The films were prepared by vapor deposition of zirconium in an O 2 atmosphere followed by annealing under ultra high vacuum. At low coverages, the films grew as discontinuous two-dimentional islands with ordered structures. The size and structure of these islands were dependent on the coverage of ZrO 2 films. At coverage <0.5 monolayer (ML), ( )

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In situ high-resolution XPS studies on adsorption of NO on Pt( 111 )

Cited by 78 publications

References 48 publications

Kinetics of ammonia oxidation over Pt foil studied in a micro-structured quartz-reactor

Kinetics of ammonia oxidation over Pt foil studied in a micro-structured quartz-reactor

Adsorption Behavior and Reaction Properties of NO and CO on Ir(111) and Rh(111)

Epitaxial growth of ultrathin ZrO2(111) films on Pt(111)

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