Reaction of Coadsorbed Nitric Oxide and Nitrogen Atoms on Rh(111)

Belton, David N.; DiMaggio, Craig L.; Schmieg, Steven J.; Ng, Koon‐Kwan

doi:10.1006/jcat.1995.1320

Cited by 89 publications

(75 citation statements)

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“…N 2 * + O * + * . However, this reaction is not considered in our reaction mechanism, based on the experimental observations of Belton et al [21].…”

Section: Elementary Reaction Mechanism and Reactor Modelmentioning

confidence: 99%

Detailed surface reaction mechanism for reduction of NO by CO

Mantri¹,

Aghalayam²

2007

Catalysis Today

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“…N 2 * + O * + * . However, this reaction is not considered in our reaction mechanism, based on the experimental observations of Belton et al [21].…”

Section: Elementary Reaction Mechanism and Reactor Modelmentioning

confidence: 99%

Detailed surface reaction mechanism for reduction of NO by CO

Mantri¹,

Aghalayam²

2007

Catalysis Today

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“…17,53 The intermediate N 2 O is easily formed from the reaction N͑a͒ +NO͑a͒ in NO reduction on palladium, platinum, and rhodium surfaces. 12,[23][24][25] The reaction pathway through N 2 O decomposition is operative at low temperatures where NO͑a͒ is significant, more than N͑a͒. 54 N 2 O is easily decomposed on Pd͑110͒ below 150 K, emitting N 2 in the inclined way.…”

Section: B Intermediate Structurementioning

confidence: 99%

“…14 Later, we showed that this inclined N 2 desorption is well reproduced in N 2 O decomposition on Pd͑110͒, Rh͑110͒, and Ir͑110͒ as well as in steady-state NO + CO ͑or H 2 ͒ and N 2 O+CO ͑or H 2 ͒ reactions on Pd͑110͒. 13,[15][16][17][18][19][20][21][22] Thus, the intermediate N 2 O͑a͒ formed from the NO͑a͒ +N͑a͒ fast reaction [23][24][25] has been proposed to be oriented along the ͓001͔ direction before dissociation in the course of the catalyzed NO reduction. In the present work, AR-product desorption measurements have been successfully performed at different crystal azimuths for the steady-state NO ͑or N 2 O͒ + CO reaction and the resultant spatial distributions of all products have been constructed in a three-dimensional way.…”

Section: Introductionmentioning

confidence: 95%

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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“…The pathway to N 2 via the intermediate N 2 O has the potential to remove nitrogen on catalyst surfaces even at around room temperature because of its fast formation and decomposition [1,22,23].…”

Section: Introductionmentioning

confidence: 99%

N2 emission-channel change in NO reduction over stepped Pd(211) by angle-resolved desorption

et al. 2012

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A sharp change in the N 2 emission channel from N 2 O(a)→N 2 (g) +O(a) to N(a)+N(a)→N 2 (g) has been found at around 500 K in a steady-state NO+D 2 reaction over stepped Pd(211)= [(S)3(111)×(100)] by means of angle-resolved desorption. The desorbing N 2 is highly collimated at around 30° off normal toward the step-down direction below about 500 K due to the intermediate N 2 O decomposition, whereas, above 500 K, the near normally directed desorption due to the recombination of N(a) is relatively enhanced. The N 2 O decomposition channel is promoted when the reaction is carried out with hydrogen (deuterium) and the channel change is accelerated by quick changes of the amounts of surface hydrogen and oxygen (or NO(a)) into the opposite directions, and enhanced nitrogen removal as ammonia on the resultant hydrogen-rich surface. In the steady-state NO+CO reaction, the N 2 emission channel gradually changes above 500 K toward recombination. A model for the off-normal N 2 emission is briefly described.

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Reaction of Coadsorbed Nitric Oxide and Nitrogen Atoms on Rh(111)

Cited by 89 publications

References 0 publications

Detailed surface reaction mechanism for reduction of NO by CO

Detailed surface reaction mechanism for reduction of NO by CO

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

N2 emission-channel change in NO reduction over stepped Pd(211) by angle-resolved desorption

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