EXAFS investigation of divalent metal ion substituted AlPOs

G. Sankar; J. M. Thomas; P. A. Wright; P. A. Barrett; G. N. Greaves; C. R.A. Catlow

doi:10.1016/0168-583X(94)00356-4

EXAFS investigation of divalent metal ion substituted AlPOs

G. Sankar^*, J. M. Thomas, P. A. Wright, P. A. Barrett, G. N. Greaves, C. R.A. Catlow

^*Corresponding author for this work

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

Abstract

Divalent metal ions, cobalt and zinc, substituted in three aluminophosphates structures (MeAPO-5, -18 and -36) have been characterised by EXAFS. The local structure of the three as-prepared materials were closely similar irrespective of the framework structure for the same concentration of Me²⁺ ion. The CoO bond distances are sensitive to the degree of oxidation of the heteroatom in the cobalt-substituted materials, increasing in the order: CoAPO-18 < CoAPO-36 < CoAPO-5 EXAFS analysis suggests that, in the reduced catalysts (CoAPO-18 and calcined ZnAPO-18), there are three short and one long bond associated with Me²⁺O of the Brønsted acid centre.

Original language	English
Pages (from-to)	37-40
Number of pages	4
Journal	Nuclear Inst. and Methods in Physics Research, B
Volume	97
Issue number	1-4
DOIs	https://doi.org/10.1016/0168-583X(94)00356-4
Publication status	Published - 2 May 1995

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title = "EXAFS investigation of divalent metal ion substituted AlPOs",

abstract = "Divalent metal ions, cobalt and zinc, substituted in three aluminophosphates structures (MeAPO-5, -18 and -36) have been characterised by EXAFS. The local structure of the three as-prepared materials were closely similar irrespective of the framework structure for the same concentration of Me2+ ion. The CoO bond distances are sensitive to the degree of oxidation of the heteroatom in the cobalt-substituted materials, increasing in the order: CoAPO-18 < CoAPO-36 < CoAPO-5 EXAFS analysis suggests that, in the reduced catalysts (CoAPO-18 and calcined ZnAPO-18), there are three short and one long bond associated with Me2+O of the Br{\o}nsted acid centre.",

author = "G. Sankar and Thomas, {J. M.} and Wright, {P. A.} and Barrett, {P. A.} and Greaves, {G. N.} and Catlow, {C. R.A.}",

note = "Funding Information: We thank EPSRC for the financial support as well as for the beam time. Use of ICSD datab ase at the Daresbury Laboratory is gratefully acknowledged.",

year = "1995",

month = may,

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doi = "10.1016/0168-583X(94)00356-4",

language = "English",

volume = "97",

pages = "37--40",

journal = "Nuclear Inst. and Methods in Physics Research, B",

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TY - JOUR

T1 - EXAFS investigation of divalent metal ion substituted AlPOs

AU - Sankar, G.

AU - Thomas, J. M.

AU - Wright, P. A.

AU - Barrett, P. A.

AU - Greaves, G. N.

AU - Catlow, C. R.A.

N1 - Funding Information: We thank EPSRC for the financial support as well as for the beam time. Use of ICSD datab ase at the Daresbury Laboratory is gratefully acknowledged.

PY - 1995/5/2

Y1 - 1995/5/2

N2 - Divalent metal ions, cobalt and zinc, substituted in three aluminophosphates structures (MeAPO-5, -18 and -36) have been characterised by EXAFS. The local structure of the three as-prepared materials were closely similar irrespective of the framework structure for the same concentration of Me2+ ion. The CoO bond distances are sensitive to the degree of oxidation of the heteroatom in the cobalt-substituted materials, increasing in the order: CoAPO-18 < CoAPO-36 < CoAPO-5 EXAFS analysis suggests that, in the reduced catalysts (CoAPO-18 and calcined ZnAPO-18), there are three short and one long bond associated with Me2+O of the Brønsted acid centre.

AB - Divalent metal ions, cobalt and zinc, substituted in three aluminophosphates structures (MeAPO-5, -18 and -36) have been characterised by EXAFS. The local structure of the three as-prepared materials were closely similar irrespective of the framework structure for the same concentration of Me2+ ion. The CoO bond distances are sensitive to the degree of oxidation of the heteroatom in the cobalt-substituted materials, increasing in the order: CoAPO-18 < CoAPO-36 < CoAPO-5 EXAFS analysis suggests that, in the reduced catalysts (CoAPO-18 and calcined ZnAPO-18), there are three short and one long bond associated with Me2+O of the Brønsted acid centre.

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U2 - 10.1016/0168-583X(94)00356-4

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EP - 40

JO - Nuclear Inst. and Methods in Physics Research, B

JF - Nuclear Inst. and Methods in Physics Research, B

IS - 1-4

ER -

EXAFS investigation of divalent metal ion substituted AlPOs

Abstract

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