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Effect of precursor synthesis on catalytic activity of Co3O4 in N2O decomposition

Paper ID Volume ID Publish Year Pages File Format Full-Text
53573 46975 2015 8 PDF Available
Title
Effect of precursor synthesis on catalytic activity of Co3O4 in N2O decomposition
Abstract

•Precursors were prepared by precipitation of cobalt nitrate in various solutions.•Activity strongly depends on the preparation conditions of catalysts precursors.•The highest activity showed a catalyst prepared with NaOH as precipitate agent.•Presence of O2 and H2O in feed stream decreased the catalytic activity.

Series of precursors was prepared by precipitation of cobalt nitrate in aqueous solutions using various precipitation agents (NH3·H2O, NaOH, Na2CO3) and reactions conditions (OH/Co molar ratio, aging time). Powder XRD showed different phase composition of the obtained precursors, in which β-Co(OH)2, CoII–CoIII layered double hydroxide, and basic cobalt carbonate were identified. Only Co3O4 spinel-like oxide was found in products after heating at 500 °C in air but different N2O conversions were observed over the examined oxide catalysts. Especially the catalysts obtained from β-Co(OH)2 precursors showed high catalytic activity in N2O decomposition. The correlation between methods of preparation, phase composition of precursors, catalytic properties of the related oxide catalysts, and the role of the cobalt ions as catalytic active sites is discussed.

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Keywords
Cobalt spinel; Co3O4 catalyst; N2O decomposition; Precursor synthesis
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Effect of precursor synthesis on catalytic activity of Co3O4 in N2O decomposition
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 257, Part 1, 15 November 2015, Pages 18–25
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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