Surface area control during the synthesis and reduction of high area ceria catalyst supports

Linda A. Bruce; Manh Hoang; Anthony E. Hughes; Terence W. Turney

doi:10.1016/0926-860X(95)00217-0

Surface area control during the synthesis and reduction of high area ceria catalyst supports

Linda A. Bruce, Manh Hoang, Anthony E. Hughes, Terence W. Turney

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

90 Citations (Scopus)

Abstract

Precipitation of ceria from (NH₄)₂[Ce(NO₃)₆] with a 'ammonium carbonate' solution produces powders, with surface areas determined by the initial [Ce] concentrations. Samples, free of carbonate impurities and with reproducible surface areas of up to 200 m² g^-1, have been obtained after controlled dehydration and calcination to 600°C. Temperature-programmed reduction (in 3% H₂/N₂) of samples with a range of surface areas, has confirmed that the net hydrogen uptake by ceria between 120 and 700°C comprises two components. The first is a constant amount which represents sorption of interstitial hydrogen into the ceria lattice. The second is proportional to the surface area of the sample and originates from partial reduction of surface Ce^IV and hydroxylation of the surface oxide.

Original language	English
Pages (from-to)	351-362
Number of pages	12
Journal	Applied Catalysis A: General
Volume	134
Issue number	2
DOIs	https://doi.org/10.1016/0926-860X(95)00217-0
Publication status	Published - 18 Jan 1996
Externally published	Yes

Keywords

Temperature-programmed reduction; ceria; surface area

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10.1016/0926-860X(95)00217-0

Cite this

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abstract = "Precipitation of ceria from (NH4)2[Ce(NO3)6] with a 'ammonium carbonate' solution produces powders, with surface areas determined by the initial [Ce] concentrations. Samples, free of carbonate impurities and with reproducible surface areas of up to 200 m2 g-1, have been obtained after controlled dehydration and calcination to 600°C. Temperature-programmed reduction (in 3% H2/N2) of samples with a range of surface areas, has confirmed that the net hydrogen uptake by ceria between 120 and 700°C comprises two components. The first is a constant amount which represents sorption of interstitial hydrogen into the ceria lattice. The second is proportional to the surface area of the sample and originates from partial reduction of surface CeIV and hydroxylation of the surface oxide.",

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AU - Bruce, Linda A.

AU - Hoang, Manh

AU - Hughes, Anthony E.

AU - Turney, Terence W.

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Y1 - 1996/1/18

N2 - Precipitation of ceria from (NH4)2[Ce(NO3)6] with a 'ammonium carbonate' solution produces powders, with surface areas determined by the initial [Ce] concentrations. Samples, free of carbonate impurities and with reproducible surface areas of up to 200 m2 g-1, have been obtained after controlled dehydration and calcination to 600°C. Temperature-programmed reduction (in 3% H2/N2) of samples with a range of surface areas, has confirmed that the net hydrogen uptake by ceria between 120 and 700°C comprises two components. The first is a constant amount which represents sorption of interstitial hydrogen into the ceria lattice. The second is proportional to the surface area of the sample and originates from partial reduction of surface CeIV and hydroxylation of the surface oxide.

AB - Precipitation of ceria from (NH4)2[Ce(NO3)6] with a 'ammonium carbonate' solution produces powders, with surface areas determined by the initial [Ce] concentrations. Samples, free of carbonate impurities and with reproducible surface areas of up to 200 m2 g-1, have been obtained after controlled dehydration and calcination to 600°C. Temperature-programmed reduction (in 3% H2/N2) of samples with a range of surface areas, has confirmed that the net hydrogen uptake by ceria between 120 and 700°C comprises two components. The first is a constant amount which represents sorption of interstitial hydrogen into the ceria lattice. The second is proportional to the surface area of the sample and originates from partial reduction of surface CeIV and hydroxylation of the surface oxide.

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Surface area control during the synthesis and reduction of high area ceria catalyst supports

Abstract

Keywords

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