Amorphous Cu-M alloy powders (Cu40Ti60, Cu50Zr50 and Cu65Hf35) produced by mechanical alloying are activated by being applied as catalyst in the transformation of various alcohols at elevated temperature (523-573 K). During the dehydrogenation of 2-propanol to acetone and the transformations of allyl alcohol to form propanal and 1-propanol active, stable and selective catalysts are generated from Cu-Zr and Cu-Hf. DSC, XRD and XPS data indicate bulk crystallization and copper segregation to the surface. Due to surface titanium enrichment Cu-Ti proved to be inferior to the other two alloys. (C) 1997 Elsevier Science S.A.
Activation of amorphous Cu-M (M=Ti, Zr or Hf) alloy powders made by mechanical alloying / Molnar, A; Domokos, L; Katona, T; Martinek, T; Mulas, Gabriele; Cocco, G; Bertoti, I; Szepvolgyi, J.. - In: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING. - ISSN 0921-5093. - 226:(1997), pp. 1074-1078. [10.1016/S0921-5093(96)10862-5]
Activation of amorphous Cu-M (M=Ti, Zr or Hf) alloy powders made by mechanical alloying
MULAS, Gabriele;
1997-01-01
Abstract
Amorphous Cu-M alloy powders (Cu40Ti60, Cu50Zr50 and Cu65Hf35) produced by mechanical alloying are activated by being applied as catalyst in the transformation of various alcohols at elevated temperature (523-573 K). During the dehydrogenation of 2-propanol to acetone and the transformations of allyl alcohol to form propanal and 1-propanol active, stable and selective catalysts are generated from Cu-Zr and Cu-Hf. DSC, XRD and XPS data indicate bulk crystallization and copper segregation to the surface. Due to surface titanium enrichment Cu-Ti proved to be inferior to the other two alloys. (C) 1997 Elsevier Science S.A.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
