The mechanism of reduction of cobalt by hydrogen

Hsin Yu Lin; Yu Wen Chen

doi:10.1016/j.matchemphys.2003.12.028

The mechanism of reduction of cobalt by hydrogen

Hsin Yu Lin, Yu Wen Chen

Department of Chemical and Materials Engineering

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

184 Scopus citations

Abstract

Cobalt catalysts supported on silica were prepared by an impregnating method and characterized using temperature-programmed reduction (TPR). H ₂ was used as the reduction agents. The two-stage reduction was observed. Co₃O₄ was reduced to CoO and then reduced to metallic Co. The activation energies for the two reduction steps of cobalt oxide are 94.43 and 82.97kJmol^-1, respectively. The simulation by reduction models of the TPR patterns presents well-fitting of two-dimensional nucleation according to Avarmi-Erofeev model for the reduction of Co ₃O₄ to CoO and unimolecular model for the reduction of CoO to Co.

Original language	English
Pages (from-to)	171-175
Number of pages	5
Journal	Materials Chemistry and Physics
Volume	85
Issue number	1
DOIs	https://doi.org/10.1016/j.matchemphys.2003.12.028
State	Published - 15 May 2004

Keywords

Cobalt
Kinetic mechanism
Temperature-programmed reduction

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10.1016/j.matchemphys.2003.12.028

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title = "The mechanism of reduction of cobalt by hydrogen",

abstract = "Cobalt catalysts supported on silica were prepared by an impregnating method and characterized using temperature-programmed reduction (TPR). H 2 was used as the reduction agents. The two-stage reduction was observed. Co3O4 was reduced to CoO and then reduced to metallic Co. The activation energies for the two reduction steps of cobalt oxide are 94.43 and 82.97kJmol-1, respectively. The simulation by reduction models of the TPR patterns presents well-fitting of two-dimensional nucleation according to Avarmi-Erofeev model for the reduction of Co 3O4 to CoO and unimolecular model for the reduction of CoO to Co.",

keywords = "Cobalt, Kinetic mechanism, Temperature-programmed reduction",

author = "Lin, {Hsin Yu} and Chen, {Yu Wen}",

note = "Funding Information: This research was supported by the National Science Council, Taiwan, ROC.",

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T1 - The mechanism of reduction of cobalt by hydrogen

AU - Lin, Hsin Yu

AU - Chen, Yu Wen

N1 - Funding Information: This research was supported by the National Science Council, Taiwan, ROC.

PY - 2004/5/15

Y1 - 2004/5/15

N2 - Cobalt catalysts supported on silica were prepared by an impregnating method and characterized using temperature-programmed reduction (TPR). H 2 was used as the reduction agents. The two-stage reduction was observed. Co3O4 was reduced to CoO and then reduced to metallic Co. The activation energies for the two reduction steps of cobalt oxide are 94.43 and 82.97kJmol-1, respectively. The simulation by reduction models of the TPR patterns presents well-fitting of two-dimensional nucleation according to Avarmi-Erofeev model for the reduction of Co 3O4 to CoO and unimolecular model for the reduction of CoO to Co.

AB - Cobalt catalysts supported on silica were prepared by an impregnating method and characterized using temperature-programmed reduction (TPR). H 2 was used as the reduction agents. The two-stage reduction was observed. Co3O4 was reduced to CoO and then reduced to metallic Co. The activation energies for the two reduction steps of cobalt oxide are 94.43 and 82.97kJmol-1, respectively. The simulation by reduction models of the TPR patterns presents well-fitting of two-dimensional nucleation according to Avarmi-Erofeev model for the reduction of Co 3O4 to CoO and unimolecular model for the reduction of CoO to Co.

KW - Cobalt

KW - Kinetic mechanism

KW - Temperature-programmed reduction

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DO - 10.1016/j.matchemphys.2003.12.028

M3 - 期刊論文

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SN - 0254-0584

VL - 85

SP - 171

EP - 175

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

IS - 1

ER -

The mechanism of reduction of cobalt by hydrogen

Abstract

Keywords

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