How nitric oxide affects the decomposition of supported nickel nitrate to arrive at highly dispersed catalysts

Jelle R.A. Sietsma; Heiner Friedrich; Alfred Broersma; Marjan Versluijs-Helder; A. Jos van Dillen; Petra E. de Jongh; Krijn P. de Jong

doi:10.1016/j.jcat.2008.10.007

How nitric oxide affects the decomposition of supported nickel nitrate to arrive at highly dispersed catalysts

Jelle R.A. Sietsma, Heiner Friedrich, Alfred Broersma, Marjan Versluijs-Helder, A. Jos van Dillen, Petra E. de Jongh, Krijn P. de Jong

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

106 Citations (Scopus)

Abstract

An explanation is put forward for the beneficial effect of thermal decomposition of supported Ni₃(NO₃)₂(OH)₄ in NO/He flow (0.1-1 vol%) that enables preparation of well-dispersed (3-5 nm particles) 24 wt% Ni-catalysts via impregnation and drying using aqueous [Ni(OH₂)₆](NO₃)₂ precursor solution. Moreover, combining electron tomography, XRD and N₂-physisorption with SBA-15 support yielded a clear picture of the impact of air, He and NO/He gas atmospheres on NiO shape and distribution. TGA/MS indicated that NO₂, N₂O, H₂O products evolved more gradually in NO/He. In situ XRD and DSC revealed that NO lowers the nitrate decomposition rate and appears less endothermic than in air supposedly due to exothermic scavenging of oxygen by NO, which is supported by MS results. The Ni/SiO₂ catalyst prepared via the NO-method displayed a higher activity in the hydrogenation of soybean oil as the required hydrogenation time decreased by 30% compared to the traditionally air calcined catalyst.

Original language	English
Pages (from-to)	227-235
Number of pages	9
Journal	Journal of Catalysis
Volume	260
Issue number	2
DOIs	https://doi.org/10.1016/j.jcat.2008.10.007
Publication status	Published - 10 Dec 2008
Externally published	Yes

Keywords

Calcination
Catalysis
Catalyst preparation
Hydrogenation
Metal nitrates
Nickel
Nitric oxide

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10.1016/j.jcat.2008.10.007

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title = "How nitric oxide affects the decomposition of supported nickel nitrate to arrive at highly dispersed catalysts",

abstract = "An explanation is put forward for the beneficial effect of thermal decomposition of supported Ni3(NO3)2(OH)4 in NO/He flow (0.1-1 vol%) that enables preparation of well-dispersed (3-5 nm particles) 24 wt% Ni-catalysts via impregnation and drying using aqueous [Ni(OH2)6](NO3)2 precursor solution. Moreover, combining electron tomography, XRD and N2-physisorption with SBA-15 support yielded a clear picture of the impact of air, He and NO/He gas atmospheres on NiO shape and distribution. TGA/MS indicated that NO2, N2O, H2O products evolved more gradually in NO/He. In situ XRD and DSC revealed that NO lowers the nitrate decomposition rate and appears less endothermic than in air supposedly due to exothermic scavenging of oxygen by NO, which is supported by MS results. The Ni/SiO2 catalyst prepared via the NO-method displayed a higher activity in the hydrogenation of soybean oil as the required hydrogenation time decreased by 30% compared to the traditionally air calcined catalyst.",

keywords = "Calcination, Catalysis, Catalyst preparation, Hydrogenation, Metal nitrates, Nickel, Nitric oxide",

author = "Sietsma, {Jelle R.A.} and Heiner Friedrich and Alfred Broersma and Marjan Versluijs-Helder and {Jos van Dillen}, A. and {de Jongh}, {Petra E.} and {de Jong}, {Krijn P.}",

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AU - Sietsma, Jelle R.A.

AU - Friedrich, Heiner

AU - Broersma, Alfred

AU - Versluijs-Helder, Marjan

AU - Jos van Dillen, A.

AU - de Jongh, Petra E.

AU - de Jong, Krijn P.

PY - 2008/12/10

Y1 - 2008/12/10

N2 - An explanation is put forward for the beneficial effect of thermal decomposition of supported Ni3(NO3)2(OH)4 in NO/He flow (0.1-1 vol%) that enables preparation of well-dispersed (3-5 nm particles) 24 wt% Ni-catalysts via impregnation and drying using aqueous [Ni(OH2)6](NO3)2 precursor solution. Moreover, combining electron tomography, XRD and N2-physisorption with SBA-15 support yielded a clear picture of the impact of air, He and NO/He gas atmospheres on NiO shape and distribution. TGA/MS indicated that NO2, N2O, H2O products evolved more gradually in NO/He. In situ XRD and DSC revealed that NO lowers the nitrate decomposition rate and appears less endothermic than in air supposedly due to exothermic scavenging of oxygen by NO, which is supported by MS results. The Ni/SiO2 catalyst prepared via the NO-method displayed a higher activity in the hydrogenation of soybean oil as the required hydrogenation time decreased by 30% compared to the traditionally air calcined catalyst.

AB - An explanation is put forward for the beneficial effect of thermal decomposition of supported Ni3(NO3)2(OH)4 in NO/He flow (0.1-1 vol%) that enables preparation of well-dispersed (3-5 nm particles) 24 wt% Ni-catalysts via impregnation and drying using aqueous [Ni(OH2)6](NO3)2 precursor solution. Moreover, combining electron tomography, XRD and N2-physisorption with SBA-15 support yielded a clear picture of the impact of air, He and NO/He gas atmospheres on NiO shape and distribution. TGA/MS indicated that NO2, N2O, H2O products evolved more gradually in NO/He. In situ XRD and DSC revealed that NO lowers the nitrate decomposition rate and appears less endothermic than in air supposedly due to exothermic scavenging of oxygen by NO, which is supported by MS results. The Ni/SiO2 catalyst prepared via the NO-method displayed a higher activity in the hydrogenation of soybean oil as the required hydrogenation time decreased by 30% compared to the traditionally air calcined catalyst.

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KW - Catalysis

KW - Catalyst preparation

KW - Hydrogenation

KW - Metal nitrates

KW - Nickel

KW - Nitric oxide

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How nitric oxide affects the decomposition of supported nickel nitrate to arrive at highly dispersed catalysts

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