XRD and TPR studies of Cu-Al hydrotalcite derived highly dispersed mixed metal oxides

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Abstract

A series of Cu/Al catalysts, containing different proportions of copper and aluminium, have been prepared by coprecipitation using metal nitrate precursors and Na2CO3. The dried precipitate catalyst precursors were characterized by X-ray diffraction (XRD) to show the presence of Cu-Al binary hydrotalcite-like phase. The dried precipitates were calcined at 873 K for 3 h. The calcined catalysts were characterized by XRD and temperature-programmed reduction (TPR) methods to show the presence of unidentified mixed oxides. The results showed that the extent of metal-support interaction increased with copper loading due to the mixed oxides formed from the hydrotalcite-type phase during calcination. High dispersion of the mixed metal oxides was indicated by comparison with similar studies on Cu-Al catalysts, prepared by similar methods, whose precursors showed no hydrotalcite formation.

Original languageEnglish
Pages (from-to)303-310
Number of pages8
JournalReaction Kinetics and Catalysis Letters
Volume70
Issue number2
Publication statusPublished - 2000

Fingerprint

hydrotalcite
mixed oxides
Oxides
metal oxides
Metals
catalysts
X ray diffraction
Catalysts
diffraction
Precipitates
Copper
precipitates
x rays
copper
Temperature
temperature
Coprecipitation
Aluminum
Nitrates
metals

Keywords

  • Cu-Al mixed oxides
  • Hydrotalcite
  • Interdispersion
  • Temperature Programmed Reduction
  • X-ray Diffraction

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

@article{53c62e7ac81e4289a863b3a011b31be5,
title = "XRD and TPR studies of Cu-Al hydrotalcite derived highly dispersed mixed metal oxides",
abstract = "A series of Cu/Al catalysts, containing different proportions of copper and aluminium, have been prepared by coprecipitation using metal nitrate precursors and Na2CO3. The dried precipitate catalyst precursors were characterized by X-ray diffraction (XRD) to show the presence of Cu-Al binary hydrotalcite-like phase. The dried precipitates were calcined at 873 K for 3 h. The calcined catalysts were characterized by XRD and temperature-programmed reduction (TPR) methods to show the presence of unidentified mixed oxides. The results showed that the extent of metal-support interaction increased with copper loading due to the mixed oxides formed from the hydrotalcite-type phase during calcination. High dispersion of the mixed metal oxides was indicated by comparison with similar studies on Cu-Al catalysts, prepared by similar methods, whose precursors showed no hydrotalcite formation.",
keywords = "Cu-Al mixed oxides, Hydrotalcite, Interdispersion, Temperature Programmed Reduction, X-ray Diffraction",
author = "Ye Lwin and Mohamad, {Abu Bakar} and Zahira Yaakob and {Wan Daud}, {Wan Ramli}",
year = "2000",
language = "English",
volume = "70",
pages = "303--310",
journal = "Reaction Kinetics, Mechanisms and Catalysis",
issn = "1878-5190",
publisher = "Springer Netherlands",
number = "2",

}

TY - JOUR

T1 - XRD and TPR studies of Cu-Al hydrotalcite derived highly dispersed mixed metal oxides

AU - Lwin, Ye

AU - Mohamad, Abu Bakar

AU - Yaakob, Zahira

AU - Wan Daud, Wan Ramli

PY - 2000

Y1 - 2000

N2 - A series of Cu/Al catalysts, containing different proportions of copper and aluminium, have been prepared by coprecipitation using metal nitrate precursors and Na2CO3. The dried precipitate catalyst precursors were characterized by X-ray diffraction (XRD) to show the presence of Cu-Al binary hydrotalcite-like phase. The dried precipitates were calcined at 873 K for 3 h. The calcined catalysts were characterized by XRD and temperature-programmed reduction (TPR) methods to show the presence of unidentified mixed oxides. The results showed that the extent of metal-support interaction increased with copper loading due to the mixed oxides formed from the hydrotalcite-type phase during calcination. High dispersion of the mixed metal oxides was indicated by comparison with similar studies on Cu-Al catalysts, prepared by similar methods, whose precursors showed no hydrotalcite formation.

AB - A series of Cu/Al catalysts, containing different proportions of copper and aluminium, have been prepared by coprecipitation using metal nitrate precursors and Na2CO3. The dried precipitate catalyst precursors were characterized by X-ray diffraction (XRD) to show the presence of Cu-Al binary hydrotalcite-like phase. The dried precipitates were calcined at 873 K for 3 h. The calcined catalysts were characterized by XRD and temperature-programmed reduction (TPR) methods to show the presence of unidentified mixed oxides. The results showed that the extent of metal-support interaction increased with copper loading due to the mixed oxides formed from the hydrotalcite-type phase during calcination. High dispersion of the mixed metal oxides was indicated by comparison with similar studies on Cu-Al catalysts, prepared by similar methods, whose precursors showed no hydrotalcite formation.

KW - Cu-Al mixed oxides

KW - Hydrotalcite

KW - Interdispersion

KW - Temperature Programmed Reduction

KW - X-ray Diffraction

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M3 - Article

AN - SCOPUS:0034217377

VL - 70

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JO - Reaction Kinetics, Mechanisms and Catalysis

JF - Reaction Kinetics, Mechanisms and Catalysis

SN - 1878-5190

IS - 2

ER -