On the structure and selectivity of graphite-supported PtNi alloys

Josémanuel E. Domínguez; Armando S. Vaźquez; Albert J. Renouprez; Miguel José Yacamán

doi:10.1016/0021-9517(82)90125-7

On the structure and selectivity of graphite-supported PtNi alloys

Josémanuel E. Domínguez
, Armando S. Vaźquez
, Albert J. Renouprez
, Miguel José Yacamán

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	101-111
Number of pages	11
Journal	Journal of Catalysis
Volume	75
Issue number	1
DOIs	https://doi.org/10.1016/0021-9517(82)90125-7
State	Published - May 1982
Externally published	Yes

ASJC Scopus subject areas

Catalysis
Physical and Theoretical Chemistry

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10.1016/0021-9517(82)90125-7

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@article{c8628d95dcf344a286c8388226bb8240,

title = "On the structure and selectivity of graphite-supported PtNi alloys",

abstract = "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.",

author = "Dom{\'i}nguez, \{Jos{\'e}manuel E.\} and Va{\'z}quez, \{Armando S.\} and Renouprez, \{Albert J.\} and Yacam{\'a}n, \{Miguel Jos{\'e}\}",

note = "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.",

year = "1982",

month = may,

doi = "10.1016/0021-9517(82)90125-7",

language = "English (US)",

volume = "75",

pages = "101--111",

journal = "Journal of Catalysis",

issn = "0021-9517",

publisher = "Academic Press Inc.",

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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.

UR - https://www.scopus.com/pages/publications/0009724196

UR - https://www.scopus.com/pages/publications/0009724196#tab=citedBy

U2 - 10.1016/0021-9517(82)90125-7

DO - 10.1016/0021-9517(82)90125-7

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VL - 75

SP - 101

EP - 111

JO - Journal of Catalysis

JF - Journal of Catalysis

IS - 1

ER -

On the structure and selectivity of graphite-supported PtNi alloys

Abstract

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