Thermal stability of monometallic Co-hydrotalcite

Beatriz Zapata; Pedro Bosch; Miguel A. Valenzuela; Geolar Fetter; Sergio O. Flores; Ivan R. Córdova

doi:10.1016/S0167-577X(02)00853-4

Thermal stability of monometallic Co-hydrotalcite

Beatriz Zapata, Pedro Bosch, Miguel A. Valenzuela, Geolar Fetter, Sergio O. Flores, Ivan R. Córdova

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

15 Scopus citations

Abstract

Monometallic Co₆²⁺Co₂³⁺(OH)^-₁₆(NO₃)^-₂·nH₂O hydrotalcite-like compound was prepared by a careful precipitation from an aqueous solution of Co(NO₃)₂·6H₂O in air atmosphere, followed by microwave irradiation. As comparison, an additional sample was prepared without microwave irradiation, employing aging in the crystallization step. Thermal evolution was studied by X-ray diffraction (XRD), FTIR, DTA/TGA and nitrogen physisorption. The microwaved sample (monometallic hydrotalcite) was stable up to 200 °C. The nonirradiated sample only showed the Co₃O₄ spinel phase.

Original language	English
Pages (from-to)	679-683
Number of pages	5
Journal	Materials Letters
Volume	57
Issue number	3
DOIs	https://doi.org/10.1016/S0167-577X(02)00853-4
State	Published - Dec 2002
Externally published	Yes

Keywords

Catalysts
Co-hydrotalcite
Microwave irradiation
Thermal properties

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10.1016/S0167-577X(02)00853-4

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@article{7c45915c637c4abc9b83754f86d80688,

title = "Thermal stability of monometallic Co-hydrotalcite",

abstract = "Monometallic Co62+Co23+(OH)-16 (NO3)-2·nH2O hydrotalcite-like compound was prepared by a careful precipitation from an aqueous solution of Co(NO3)2·6H2O in air atmosphere, followed by microwave irradiation. As comparison, an additional sample was prepared without microwave irradiation, employing aging in the crystallization step. Thermal evolution was studied by X-ray diffraction (XRD), FTIR, DTA/TGA and nitrogen physisorption. The microwaved sample (monometallic hydrotalcite) was stable up to 200 °C. The nonirradiated sample only showed the Co3O4 spinel phase.",

keywords = "Catalysts, Co-hydrotalcite, Microwave irradiation, Thermal properties",

author = "Beatriz Zapata and Pedro Bosch and Valenzuela, {Miguel A.} and Geolar Fetter and Flores, {Sergio O.} and C{\'o}rdova, {Ivan R.}",

note = "Funding Information: B. Zapata and G. Fetter thank the Conacyt for financial support. M.A. Valenzuela is grateful to the IPN -COFAA.",

year = "2002",

month = dec,

doi = "10.1016/S0167-577X(02)00853-4",

language = "Ingl{\'e}s",

volume = "57",

pages = "679--683",

journal = "Materials Letters",

issn = "0167-577X",

number = "3",

}

TY - JOUR

T1 - Thermal stability of monometallic Co-hydrotalcite

AU - Zapata, Beatriz

AU - Bosch, Pedro

AU - Valenzuela, Miguel A.

AU - Fetter, Geolar

AU - Flores, Sergio O.

AU - Córdova, Ivan R.

N1 - Funding Information: B. Zapata and G. Fetter thank the Conacyt for financial support. M.A. Valenzuela is grateful to the IPN -COFAA.

PY - 2002/12

Y1 - 2002/12

N2 - Monometallic Co62+Co23+(OH)-16 (NO3)-2·nH2O hydrotalcite-like compound was prepared by a careful precipitation from an aqueous solution of Co(NO3)2·6H2O in air atmosphere, followed by microwave irradiation. As comparison, an additional sample was prepared without microwave irradiation, employing aging in the crystallization step. Thermal evolution was studied by X-ray diffraction (XRD), FTIR, DTA/TGA and nitrogen physisorption. The microwaved sample (monometallic hydrotalcite) was stable up to 200 °C. The nonirradiated sample only showed the Co3O4 spinel phase.

AB - Monometallic Co62+Co23+(OH)-16 (NO3)-2·nH2O hydrotalcite-like compound was prepared by a careful precipitation from an aqueous solution of Co(NO3)2·6H2O in air atmosphere, followed by microwave irradiation. As comparison, an additional sample was prepared without microwave irradiation, employing aging in the crystallization step. Thermal evolution was studied by X-ray diffraction (XRD), FTIR, DTA/TGA and nitrogen physisorption. The microwaved sample (monometallic hydrotalcite) was stable up to 200 °C. The nonirradiated sample only showed the Co3O4 spinel phase.

KW - Catalysts

KW - Co-hydrotalcite

KW - Microwave irradiation

KW - Thermal properties

UR - http://www.scopus.com/inward/record.url?scp=0036894376&partnerID=8YFLogxK

U2 - 10.1016/S0167-577X(02)00853-4

DO - 10.1016/S0167-577X(02)00853-4

M3 - Artículo

SN - 0167-577X

VL - 57

SP - 679

EP - 683

JO - Materials Letters

JF - Materials Letters

IS - 3

ER -

Thermal stability of monometallic Co-hydrotalcite

Abstract

Keywords

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