TY - JOUR
T1 - On the structure and selectivity of graphite-supported PtNi alloys
AU - Domínguez, Josémanuel E.
AU - Vaźquez, Armando S.
AU - Renouprez, Albert J.
AU - Yacamán, Miguel José
N1 - Funding Information:
We appreciate discussions with Dr. K. Klier and Dr. S. Fuentes. We also thank Dr. B. Moraweck from the IRC-CNRS of Lyon, France, for assistance in preparation of samples and Mr. F. Ruiz for technical assistance during the electron microscopy studies. Part of this work was supported by the PNCB-CONACyT program.
PY - 1982/5
Y1 - 1982/5
N2 - X-Ray diffraction and transmission electron microscopy were applied to characterize supported PtNi bimetallic systems. It was found that homogeneous alloys were formed. In the cases when the Pt content was greater than 50% the particles have a cubo-octahedral shape. Kinetic results showed that selectivity to isomerization for isopentane increases with Pr content from about 6 to 87% in the composition range between 37 and 100% in atomic Pt. Results are explained on the basis of the variation of percentages of Pt sites present on the (111) faces of the PtNi cubo-octahedrons. A good correlation between B3-type sites of platinum and selectivity was found assuming that there is no segregation surface on the particle alloys.
AB - X-Ray diffraction and transmission electron microscopy were applied to characterize supported PtNi bimetallic systems. It was found that homogeneous alloys were formed. In the cases when the Pt content was greater than 50% the particles have a cubo-octahedral shape. Kinetic results showed that selectivity to isomerization for isopentane increases with Pr content from about 6 to 87% in the composition range between 37 and 100% in atomic Pt. Results are explained on the basis of the variation of percentages of Pt sites present on the (111) faces of the PtNi cubo-octahedrons. A good correlation between B3-type sites of platinum and selectivity was found assuming that there is no segregation surface on the particle alloys.
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U2 - 10.1016/0021-9517(82)90125-7
DO - 10.1016/0021-9517(82)90125-7
M3 - Article
AN - SCOPUS:0009724196
SN - 0021-9517
VL - 75
SP - 101
EP - 111
JO - Journal of Catalysis
JF - Journal of Catalysis
IS - 1
ER -