Adsorption and decomposition of NO on Pt (112)

Sugisawa, T.; J, Shiraishi; D, Machihara; Irokawa, Katsumi; Miki, Hirofumi; Kodama, C.; Kuriyama, Takashi; Kubo, Toshitaka; Nozoye, Hisakazu

doi:10.1016/s0169-4332(00)00675-9

Cited by 26 publications

(56 citation statements)

References 14 publications

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“…The high-temperature peak was assigned to desorption of NO from the step sites and the two lower-temperature peaks were assigned to desorption from the ͕111͖ terraces. 8 In addition to the desorption of NO, N 2 desorption was also detected in the TPD spectrum. The production of N 2 was assigned to the recombinative desorption of N atoms, produced by NO dissociation on the Pt͕211͖ surface.…”

Section: Introductionmentioning

confidence: 99%

“…However, there is still some controversy in the literature concerning the dissociation of NO on Pt͕211͖ at 300 K. Banholzer and co-workers 7 used symmetry considerations to show that Pt͕111͖ surfaces with ͕100͖ steps, such as Pt͕211͖, should show high activity for NO dissociation at the step sites. However, Sugisawa et al 8 found that NO did not dissociate on Pt͕211͖ until ϳ480 K. Gohndrone and Masel 9 noted that Pt͕211͖ dissociates NO with a similar reactivity to Pt͕411͖ and Pt͕100͖ which is known to dissociate NO at room temperature. 10 Previous work by Heiz 11,12 did not look for NO dissociation on Pt͕211͖, but work on polycrystalline Pt ͑Ref.…”

Section: Introductionmentioning

confidence: 99%

“…8,9,11,12,16,25 Heiz performed RAIRS investigations of electron 11,12 and photon 11 stimulated desorption of NO from the step sites of Pt͕211͖. They observed infrared bands due to NO adsorbed on both step and terrace sites.…”

Section: Introductionmentioning

confidence: 99%

“…They observed infrared bands due to NO adsorbed on both step and terrace sites. NO adsorption on Pt͕211͖ has also been studied using TPD, 8,9 ultraviolet photoelectron spectroscopy ͑UPS͒, 8 and x-ray photoelectron spectroscopy ͑XPS͒. 8 Sugisawa and co-workers 8 used XPS and UPS to show that NO adsorbs molecularly on Pt͕211͖ at 95 K. TPD spectra following NO adsorption on Pt͕211͖ at 95 K ͑Ref.…”

Section: Introductionmentioning

confidence: 99%

“…NO adsorption on Pt͕211͖ has also been studied using TPD, 8,9 ultraviolet photoelectron spectroscopy ͑UPS͒, 8 and x-ray photoelectron spectroscopy ͑XPS͒. 8 Sugisawa and co-workers 8 used XPS and UPS to show that NO adsorbs molecularly on Pt͕211͖ at 95 K. TPD spectra following NO adsorption on Pt͕211͖ at 95 K ͑Ref. 8͒ resulted in the desorption of three NO species with desorption temperatures of 303, 378, and 488 K. The high-temperature peak grew into the spectrum first and the two lower-temperature peaks were observed to grow in with increasing NO coverage.…”

Section: Introductionmentioning

confidence: 99%

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The influence of steps on the dissociation of NO on Pt surfaces: Temperature-programmed desorption studies of NO adsorption on Pt{211}

Mukerji

Bolina

Brown

2003

The Journal of Chemical Physics

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Article (Published Version) http://sro.sussex.ac.uk This document is made available in accordance with publisher policies and may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the URL above for details on accessing the published version. Copyright and reuse:Sussex Research Online is a digital repository of the research output of the University.Copyright and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable, the material made available in SRO has been checked for eligibility before being made available.Copies of full text items generally can be reproduced, displayed or performed and given to third parties in any format or medium for personal research or study, educational, or not-for-profit purposes without prior permission or charge, provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. Temperature-programmed desorption ͑TPD͒ has been used to investigate the adsorption of NO on Pt͕211͖ at 300 K and 120 K. Results show that NO dissociation occurs readily on Pt͕211͖,a s evidenced by the observation of N 2 and N 2 O in the TPD spectrum. Following adsorption at 120 K three NO TPD peaks at 338, 416, and 503 K are observed, in agreement with previous observations. In combination with data acquired in a recent reflection absorption infrared spectroscopy and density functional theory investigation of NO/Pt͕211͖, these peaks are assigned to the desorption of NO from an O-NO complex, the recombinative desorption of N and O atoms, and to desorption of a step-bridged NO species, respectively. These assignments are in disagreement with previous work, where the high-temperature NO peak was assigned to the desorption of step bound NO and the two low-temperature peaks were assigned to the desorption of NO from terrace sites. TPD spectra recorded following adsorption at 300 K, with a heating rate of 1 K s Ϫ1 , show similar features to those recorded following 120 K adsorption. This is also in disagreement with previous observations, where only two NO TPD peaks were observed following adsorption at room temperature. This disagreement can be accounted for by the different heating rates used in the two experiments. The influence of steps on the dissociation of NO on

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Section: Introductionmentioning

confidence: 99%