Catalysis by highly diluted Ni+Cu alloy foils: H2-D2 equilibration and ethylene-deuterium exchange reaction

Z. Schay, Pál Tétényi

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5 Citations (Scopus)

Abstract

The reactions of D2 with H2 and with C 2H4 have been studied over carefully cleaned Ni + Cu alloy foils containing 0.01, 0.1, 1 and 10 atom % Ni. The rate of H 2-D2 equilibration varied only about ten-fold with Ni content, and the activation energy was constant (22 kJ mol-1). Surface enrichment by Cu was inferred. With the C2H 4-D2 reaction, no ethane was formed, but stepwise exchange to C2H3D and HD occurred readily. Multiple exchange in the initial stages was only observable with alloys having 1 and 10% Ni. The great majority of Ni atoms at the surface appear to be isolated. Attempts to use A.E.S., H2 and CO chemisorption to assess surface composition were unsuccessful.

Original languageEnglish
Pages (from-to)1001-1010
Number of pages10
JournalJournal of the Chemical Society, Faraday Transactions 1: Physical chemistry in Condensed Phases
Volume75
DOIs
Publication statusPublished - 1979

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Deuterium
Metal foil
Catalysis
catalysis
deuterium
foils
ethylene
Atoms
Ethane
Carbon Monoxide
Chemisorption
Surface structure
Activation energy
ethane
chemisorption
atoms
activation energy

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

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abstract = "The reactions of D2 with H2 and with C 2H4 have been studied over carefully cleaned Ni + Cu alloy foils containing 0.01, 0.1, 1 and 10 atom {\%} Ni. The rate of H 2-D2 equilibration varied only about ten-fold with Ni content, and the activation energy was constant (22 kJ mol-1). Surface enrichment by Cu was inferred. With the C2H 4-D2 reaction, no ethane was formed, but stepwise exchange to C2H3D and HD occurred readily. Multiple exchange in the initial stages was only observable with alloys having 1 and 10{\%} Ni. The great majority of Ni atoms at the surface appear to be isolated. Attempts to use A.E.S., H2 and CO chemisorption to assess surface composition were unsuccessful.",
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T1 - Catalysis by highly diluted Ni+Cu alloy foils

T2 - H2-D2 equilibration and ethylene-deuterium exchange reaction

AU - Schay, Z.

AU - Tétényi, Pál

PY - 1979

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N2 - The reactions of D2 with H2 and with C 2H4 have been studied over carefully cleaned Ni + Cu alloy foils containing 0.01, 0.1, 1 and 10 atom % Ni. The rate of H 2-D2 equilibration varied only about ten-fold with Ni content, and the activation energy was constant (22 kJ mol-1). Surface enrichment by Cu was inferred. With the C2H 4-D2 reaction, no ethane was formed, but stepwise exchange to C2H3D and HD occurred readily. Multiple exchange in the initial stages was only observable with alloys having 1 and 10% Ni. The great majority of Ni atoms at the surface appear to be isolated. Attempts to use A.E.S., H2 and CO chemisorption to assess surface composition were unsuccessful.

AB - The reactions of D2 with H2 and with C 2H4 have been studied over carefully cleaned Ni + Cu alloy foils containing 0.01, 0.1, 1 and 10 atom % Ni. The rate of H 2-D2 equilibration varied only about ten-fold with Ni content, and the activation energy was constant (22 kJ mol-1). Surface enrichment by Cu was inferred. With the C2H 4-D2 reaction, no ethane was formed, but stepwise exchange to C2H3D and HD occurred readily. Multiple exchange in the initial stages was only observable with alloys having 1 and 10% Ni. The great majority of Ni atoms at the surface appear to be isolated. Attempts to use A.E.S., H2 and CO chemisorption to assess surface composition were unsuccessful.

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