The adsorption of N2O on clean and chemically modified Ru(001) surfaces

Huang, Hsing Hua; Seet, C. S.; Zou, Zhiyu; Xu, Guodong

doi:10.1016/0039-6028(96)00035-0

Cited by 33 publications

(20 citation statements)

References 32 publications

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“…In the presence of adsorbed oxygen, the heat of N 2 O adsorption increases from around 30 to 43 kJ mole −1 on Ru͑0001͒. 61 However, no collimation angle shift has been observed on Rh͑110͒ as a result of the addition of O͑a͒ although the TPD decomposition peak shifted from 70 to 140 K. 13,19 Rather, the intermediate N 2 O may be affected by coadsorbed species, such as N͑a͒ and NO͑a͒. The coverage of N͑a͒ may also be significant in the NO reduction.…”

Section: Different Collimation Anglesmentioning

confidence: 99%

Spatial distributions of desorbing products in steady-state NO and N2O reductions on Pd(110)

Matsushima

Shobatake

et al. 2006

The Journal of Chemical Physics

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The angular and velocity distributions of desorbing product N 2 were examined over the crystal azimuth in steady-state NO + CO and N 2 O + CO reactions on Pd͑110͒ by cross-correlation time-of-flight techniques. At surface temperatures below 600 K, N 2 desorption in both reactions splits into two directional lobes collimated along 41°-45°from the surface normal toward the ͓001͔ and ͓001͔ directions. Above 600 K, the normally directed N 2 desorption is enhanced in the NO reduction. Each product desorption component, as well as CO 2 , shows a fairly asymmetric distribution about its collimation axis. Two factors, i.e., the anisotropic site structures and the reactant orientation and movements, are operative to induce such asymmetry, depending on the product emission mechanism.

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Section: Different Collimation Anglesmentioning

confidence: 99%

Spatial distributions of desorbing products in steady-state NO and N2O reductions on Pd(110)

Matsushima

Shobatake

et al. 2006

The Journal of Chemical Physics

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“…The adsorption form of N 2 O may be changed in the presence of oxygen. In fact, the heat of adsorption was reported to increase on Ru(001) by the addition of a small amount of oxygen [17].…”

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confidence: 99%

Angular distributions of desorbing N2 in thermal N2O decomposition on Rh(1 0 0)

Matsushima

Kokalj

2007

Surface Science

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The angular distribution of desorbing N 2 was studied in the decomposition of N 2 O(a) on Rh(100) at 60-140 K by means of angle-resolved temperature-programmed desorption. N 2 desorption shows two peaks at around 80 K and 110 K. At low N 2 O coverage, the former collimates far from the surface normal toward the [001] direction, whereas at high coverage, the desorption sharply collimates along the surface normal.The adsorption form of N 2 O and its dissociation were also examined by DFT-GGA 2 calculations. Dissociating N 2 O is proposed to be lying along the [001] direction at low coverage and to change to an upright form bonding through the terminal oxygen at high coverage.

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“…Below Point (1) former is likely because of the stabilization effect by O(a) in a small amount as described below [29]. Such behavior was also observed at higher temperatures (Fig.…”

Section: Oxygen Effect Toward Each Processmentioning

confidence: 48%

“…This is expected because the N 2 O decomposition is severely suppressed by co-adsorbed oxygen on Pd(110) and Rh(110) [19,22]. However, the presence of small amounts of oxygen can stabilize N 2 O(a) as reported on Ru(001) [29]. The heat of adsorption of N 2 O is increased on metal sites charged positively.…”

Section: Oxygen Effect Toward Each Processmentioning

confidence: 85%