Surface chemistry of NO and NO2 on the Pt(110)-(1×2) surface: A comparative study

Jiang, Zhiquan; Huang, Weixin; Tan, Dali; Zhai, Runsheng; Bao, Xinhe

doi:10.1016/j.susc.2006.08.007

Cited by 27 publications

(27 citation statements)

References 48 publications

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“…These are in sharp contrast to thermal decomposition products from single crystal Pt, 30,31 Rh, 32 and Pd 33 surfaces presaturated by NO at room temperature, where the amount of NO desorption is comparable to or larger than half of that of N 2 , and N 2 O forms in a large amount (the integrated N 2 O area is comparable to or larger than half of the integrated N 2 area). Therefore, our data demonstrate that both planar and faceted Ir(210) are more active and selective to N 2 formation than Pt, Rh, and Pd in NO decomposition.…”

Section: Discussioncontrasting

confidence: 58%

Structure Sensitivity in Adsorption and Decomposition of NO on Ir

Chen¹,

Madey²,

Stottlemyer³

et al. 2008

J. Phys. Chem. C

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The adsorption and decomposition of NO on planar Ir(210) and nanofaceted Ir(210) with tunable facet sizes (5-14 nm) have been studied by means of temperature programmed desorption (TPD), high-resolution electron energy loss spectroscopy (HREELS), and density functional theory (DFT). Evidence has been found for structure sensitivity in adsorption sites and thermal decomposition of NO on planar Ir(210) versus those on faceted Ir(210). Both planar and faceted Ir(210) surfaces are very active for NO decomposition with high selectivity to N 2 . Heating NO-saturated planar Ir(210) leads to desorption of large amounts of N 2 and small amounts of NO together with traces of N 2 O. Annealing NO-saturated faceted Ir(210) also produces large amounts of N 2 and small amounts of NO without the formation of N 2 O. Adsorption of NO at 300 K on both surfaces is predominantly molecular. On planar Ir(210) NO adsorbs on atop sites for the entire NO coverage range. On faceted Ir(210) that contains (110) and {311} faces, NO adsorbs on bridge and atop sites at low NO coverage while only on atop sites at high NO coverage. No evidence has been found for size effects in the thermal decomposition of NO over faceted Ir(210) for average facet size ranging from 5 to 14 nm.

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Section: Discussioncontrasting

confidence: 58%

Structure Sensitivity in Adsorption and Decomposition of NO on Ir

Chen¹,

Madey²,

Stottlemyer³

et al. 2008

J. Phys. Chem. C

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“…Several review papers have summarized the development of the studies of the surface chemistry of NO on metal crystals [144][145][146][147][148]. Adsorption of NO on Pt surfaces is highly dependent on the surface structure and proceeds preferentially on steps sites, on which NO dissociation takes place, a process that is essential for NO reduction.…”

Section: Surface Chemistry Of No On Pt Surfacesmentioning

confidence: 99%

Surface science studies of selective catalytic reduction of NO: Progress in the last ten years

Griffiths

Norton

2009

Surface Science

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“…All together, the results illustrate that the thermal decomposition of NO is structure sensitive with faceted Ir(210) being more reactive and selective to N 2 than planar Ir(210) at high NO coverage. This study [10] also concludes that Ir is more active and selective to N 2 formation than Pt, Rh, and Pd in NO decomposition based on the comparison of TPD spectra from adsorption of saturated NO on planar and faceted Ir(210) at 300 K with those from single crystal Pt [171,172], Rh [71], and Pd [173] surfaces presaturated by NO at room temperature. This study [10] also concludes that Ir is more active and selective to N 2 formation than Pt, Rh, and Pd in NO decomposition based on the comparison of TPD spectra from adsorption of saturated NO on planar and faceted Ir(210) at 300 K with those from single crystal Pt [171,172], Rh [71], and Pd [173] surfaces presaturated by NO at room temperature.…”

Section: Adsorption and Decomposition Of Nitric Oxidementioning

confidence: 62%