INFLUENCE OF Ni ADDITION TO LOW-LOADED PALLADIUM CATALYST ON THE SELECTIVE HYDROGENATION OF 1-HEPTYNE

CECILIA R. LEDERHOS; JUAN M. BADANO; MÓNICA E. QUIROGA; FERNANDO COLOMA-PASCUAL; PABLO C. L'ARGENTIÈRE

QUíMICA NOVA

Scielo

Año: 2010 vol. 33 p. 816 - 820

0100-4042

Semi-hydrogenation of alkynes has industrial and academic relevance on a large scale. To increase the activity, selectivity and lifetime of monometallic catalysts, the development of bimetallic catalysts has been investigated. 1-Heptyne hydrogenation over low-loaded Pd and Ni monometallic and PdNi bimetallic catalysts was studied in liquid phase at mild conditions. XPS results suggest that nickel addition to Pd modifies the electronic state of palladium as nickel loading is increased. Low-loaded Pd catalysts showed the highest selectivities (> 95 %). The most active prepared catalyst, PdNi(1%), was more selective than the Lindlar catalyst.