Reactions of azomethane on a clean, H-covered, and O-covered Pt(111) surface

P. Berlowitz; B. L. Yang; J. B. Butt; H. H. Kung

doi:10.1016/0039-6028(86)90562-5

Reactions of azomethane on a clean, H-covered, and O-covered Pt(111) surface

P. Berlowitz, B. L. Yang, J. B. Butt, H. H. Kung^*

^*Corresponding author for this work

Chemical and Biological Engineering

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

The reactions of azomethane were studied on a clean, H-covered, and O-covered Pt(111) surface at different coverages of azomethane, and ratios of hydrogen or oxygen to azomethane, by temperature programmed desorption. On a clean surface, dehydrogenetion, together with breaking of the NN bond to produce HCN and H₂ were the major reactions. Small amounts of methylamine and cyanogen were also observed. On an H-covered surface at high hydrogen coverage, methane was the dominant product, in addition to H₂. This adsorbed hydrogen promoted breaking of the CN bond. In addition, the dehydrogenation product HCN was also observed, as was methylamine. On the O-covered surface, CO, CO₂, H₂O, and small amounts of NO were observed together with the products typical for a clean surface. Comparison of the results with those for acetylene, ethylene, and diazomethane is made.

Original language	English (US)
Pages (from-to)	69-82
Number of pages	14
Journal	Surface Science
Volume	171
Issue number	1
DOIs	https://doi.org/10.1016/0039-6028(86)90562-5
State	Published - May 1 1986

Funding

This work was supported by the Basic Research Department, Gas Research Institute. We thank one of the referees for the suggestion to look for cyanogen as a product.

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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title = "Reactions of azomethane on a clean, H-covered, and O-covered Pt(111) surface",

abstract = "The reactions of azomethane were studied on a clean, H-covered, and O-covered Pt(111) surface at different coverages of azomethane, and ratios of hydrogen or oxygen to azomethane, by temperature programmed desorption. On a clean surface, dehydrogenetion, together with breaking of the NN bond to produce HCN and H2 were the major reactions. Small amounts of methylamine and cyanogen were also observed. On an H-covered surface at high hydrogen coverage, methane was the dominant product, in addition to H2. This adsorbed hydrogen promoted breaking of the CN bond. In addition, the dehydrogenation product HCN was also observed, as was methylamine. On the O-covered surface, CO, CO2, H2O, and small amounts of NO were observed together with the products typical for a clean surface. Comparison of the results with those for acetylene, ethylene, and diazomethane is made.",

author = "P. Berlowitz and Yang, {B. L.} and Butt, {J. B.} and Kung, {H. H.}",

note = "Funding Information: This work was supported by the Basic Research Department, Gas Research Institute. We thank one of the referees for the suggestion to look for cyanogen as a product.",

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AU - Berlowitz, P.

AU - Yang, B. L.

AU - Butt, J. B.

AU - Kung, H. H.

N1 - Funding Information: This work was supported by the Basic Research Department, Gas Research Institute. We thank one of the referees for the suggestion to look for cyanogen as a product.

PY - 1986/5/1

Y1 - 1986/5/1

N2 - The reactions of azomethane were studied on a clean, H-covered, and O-covered Pt(111) surface at different coverages of azomethane, and ratios of hydrogen or oxygen to azomethane, by temperature programmed desorption. On a clean surface, dehydrogenetion, together with breaking of the NN bond to produce HCN and H2 were the major reactions. Small amounts of methylamine and cyanogen were also observed. On an H-covered surface at high hydrogen coverage, methane was the dominant product, in addition to H2. This adsorbed hydrogen promoted breaking of the CN bond. In addition, the dehydrogenation product HCN was also observed, as was methylamine. On the O-covered surface, CO, CO2, H2O, and small amounts of NO were observed together with the products typical for a clean surface. Comparison of the results with those for acetylene, ethylene, and diazomethane is made.

AB - The reactions of azomethane were studied on a clean, H-covered, and O-covered Pt(111) surface at different coverages of azomethane, and ratios of hydrogen or oxygen to azomethane, by temperature programmed desorption. On a clean surface, dehydrogenetion, together with breaking of the NN bond to produce HCN and H2 were the major reactions. Small amounts of methylamine and cyanogen were also observed. On an H-covered surface at high hydrogen coverage, methane was the dominant product, in addition to H2. This adsorbed hydrogen promoted breaking of the CN bond. In addition, the dehydrogenation product HCN was also observed, as was methylamine. On the O-covered surface, CO, CO2, H2O, and small amounts of NO were observed together with the products typical for a clean surface. Comparison of the results with those for acetylene, ethylene, and diazomethane is made.

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Reactions of azomethane on a clean, H-covered, and O-covered Pt(111) surface

Abstract

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ASJC Scopus subject areas

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