Carbon-carbon bond activation in adsorbed cyclopropane by gas-phase atomic hydrogen on the Ni(111) surface

Article Abstract:

Carbon-carbon bond activation in adsorbed cyclopropane is induced by gas-phase atomic hydrogen on the Ni(111) surface. The adsorbed cyclopropane reacts with gas-phase atomic hydrogen to produce intermediates at 105 K, which are hydrogenated by coadsorbed hydrogen to yield propane at 116 and 210 K. In addition, the reaction of adsorbed cyclopropane with subsurface hydrogen results in propane formation at 170 K on the Ni(111) surface. Since there is neither ethane nor methane formation, it is concluded that no multiple carbon-carbon bond activation processes take place.

Adsorption, Surface chemistry, Cyclic compounds, Propane

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Gas-phase atomic hydrogen induced carbon-carbon bond activation in cyclopropnae on the Pt(111) surface

Article Abstract:

A study was conducted to analyze carbon-carbon bond activation in adsorbed cyclopropane after exposure to gas-phase atomic hydrogen on the Pt(111) surface. The study was carried out using an ultrahigh-vacuum chamber supporting turbo and ion pumps. The crystal was then cleaned by argon ion sputtering and annealing. Experimental results indicated that no propane formation occurs during the presence of coadsorbed hydrogen.

Platinum, Surfaces (Materials), Surfaces (Technology)

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Desulfurization of the Ni(100) surface using gas-phase hydrogen radicals

Article Abstract:

Gas-phase hydrogen radicals can remove adsorbed sulfur from the Ni(100) surface via three mechanisms, resulting in the formation of H2S. One of these mechanisms is the direct abstraction during hydrogen radical exposure. Another is the addition of hydrogen to a sulfhydryl intermediate created during the hydrogen radical exposure. The last is the reaction of subsurface hydrogen with adsorbed sulfur.

Radicals (Chemistry), Nickel compounds, Desulfurization, Desulfuration

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