1948
DOI: 10.1002/zaac.19482570104
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Katalytische Untersuchungen an Legierungen. XII. Die Parawasserstoff‐Umwandlung an Kupfer‐Platin‐Mischkristallen

Abstract: Die katalytische Parawasserstoff‐Umwandlung ist an Kupfer–Platin‐Misch‐kristallen untersucht worden. Es wird eine Apparatur zur Darstellung von p‐H2 und zur Messung seiner Konzentration sowie zur Bestimmung der katalytischen Umwandlung von p‐H2 in n‐H2 beschrieben. Die Messung der katalytischen p‐H2‐Umwandlung an Kupfer und Platin sowie an Kupfer–Platin‐Mischkristallen ergab eine kleine Aktivität des Kupfers, eine hohe des Platins, die auch bei Verdünnung des Platins durch Kupfer in den Legierungen bis hinab z… Show more

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Cited by 34 publications
(6 citation statements)
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“…The activity of these alloys in catalyzing the hydrogenation increases, as seen from figure 6 with their content of Ni, Pd, or Pt only up to a certain small value of the content and the remains constant, closely in parallel with their activity in catalyzing parahydrogen conversion [50]. Ni, Pd, Pt atom% 80 1 Alloys with superlattice have lower activation heats, although their activity is much the same as that of disordered alloys [47,48,49 [53] have observed the activity of Cu-Ni alloys in catalyzing the hydrogenation of ethylene from -70 to above 100 *C; the results indicate that the activity of the alloys outweigh that of any pure component, in contrast with the results at 500 *C shown in figure 6.…”
Section: Rhmentioning
confidence: 79%
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“…The activity of these alloys in catalyzing the hydrogenation increases, as seen from figure 6 with their content of Ni, Pd, or Pt only up to a certain small value of the content and the remains constant, closely in parallel with their activity in catalyzing parahydrogen conversion [50]. Ni, Pd, Pt atom% 80 1 Alloys with superlattice have lower activation heats, although their activity is much the same as that of disordered alloys [47,48,49 [53] have observed the activity of Cu-Ni alloys in catalyzing the hydrogenation of ethylene from -70 to above 100 *C; the results indicate that the activity of the alloys outweigh that of any pure component, in contrast with the results at 500 *C shown in figure 6.…”
Section: Rhmentioning
confidence: 79%
“…Alloys of transition elements with Cu, i.e., Ni-Cu [47], Pd-Cu [48], and Pt-Cu [48,50], were prepared in the form of thin plates, which by means of x-ray analysis were confirmed to be disordered when flashed or flashed and quenched but ordered with a superlattice when alloys of the appropriate atomic ratio were annealed. In their experiments runs were conducted by allowing an equimolar mixture of ethylene and hydrogen of 1 atm total pressure to flow through a catalyst bed and by analyzing the effluent gas for the ethane-yield; the absence of methane in the effluent gas was therewithal confirmed.…”
Section: Rhmentioning
confidence: 99%
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“…In fact the level at which the functions saturate at high kinetic energy is given by the parameter AO(v, J ) in eqn. (7). For a given u, these parameters are found to be essentially independent of J , but vary with vibrational state.…”
Section: 21mentioning
confidence: 83%
“…The specific dependence of the activation energy of the width parameter derives from the particular form of eqn. (7), which expresses the dependence of So in translational energy. Fig.…”
Section: 2mentioning
confidence: 99%