Effect of the catalyst preparation method on the performance of Ni-supported catalysts for the synthesis of saturated amines from nitrile hydrogenation

Segobia, Darío Jobino; Trasarti, Andrés Fernando; Apesteguı́a, C.R.

doi:10.1016/s1872-2067(18)63179-1

Cited by 15 publications

(3 citation statements)

References 54 publications

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“…The diethylamine mass spectrum on NaAu x does not contain any [M + H] + mass lines with m / z 74; however, it does contain mass lines with large m / z , which indicates that there are associates forming on NaAu x , and exchange reactions do take place. A previous study 27 showed that amine associate formation is possible not only due to hydrogen atoms bonding at nitrogen, as seen above, but also due to the substituents bonding in amines, including bonding between methyl and ethyl groups. Besides, this paper also shows the possibility of associate formation between amines and co‐adsorbed hydrocarbons.…”

Section: Discussionmentioning

confidence: 66%

Formation of diethylamine thermal ionization mass spectrum on NaAu_x intermetallide

Knat’ko

Lapushkin

2021

Rapid Comm Mass Spectrometry

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Rationale The mass spectra of amine thermal ionization on intermetallic NaAux emitters differ significantly from those of the same compounds on the surfaces of transition metals and their oxides. The factors underlying these differences are determined through studying the processes taking place on intermetallic surfaces, which give rise to the corresponding mass spectra. Methods The dependence of mass spectral composition and individual line intensity of diethylamine thermal ionization on intermetallic NaAux surface on diethylamine pressure, oxygen, sodium atom current and emitter temperature was studied using a magnet sector mass spectrometer. Results Diethylamine mass spectral composition is determined by the reaction between the molecules adsorbed on the NaAux surface. Oxygen and sodium concentration on the surface does not affect the mass spectral composition. Mass line intensity depends on diethylamine pressure and emitter temperature affecting the reaction efficiency on the surface. Conclusions Intermetallic NaAux is an ionic semiconductor that can provide sufficient lifetime for adsorbed molecules to efficiently interact with each other and with their decomposition products. This creates unique conditions for the formation of various compounds on the surface with their mass exceeding by 2.5 times that of diethylamine.

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Section: Discussionmentioning

confidence: 66%

Formation of diethylamine thermal ionization mass spectrum on NaAu_x intermetallide

Knat’ko

Lapushkin

2021

Rapid Comm Mass Spectrometry

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“…16 It has been reported that alkaline additives such as NH 3 and NaOH significantly enhance the selectivity to primary amines, 21,22 although they can also decrease activity. 23 Segobia et al 24 reported that different valence states of the Ni site exhibit varying affinities for nitrile adsorption, affecting both activity and selectivity in butyronitrile hydrogenation. This insight is valuable for designing catalytically active sites for nitrile hydrogenation.…”

Section: ■ Introductionmentioning

confidence: 99%

Structural Ni⁰–Ni^δ+ Pair Sites for Highly Active Hydrogenation of Nitriles to Primary Amines

Lyu,

Jian,

Nie

et al. 2024

J. Am. Chem. Soc.

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Supported metal pair sites have sparked interest due to their tremendous potential as bifunctional catalysts. Here, we report the structural Ni 0 −Ni δ+ pair sites constructed in a welldefined nanocrystal phase of Ni 3 P. These Ni 0 −Ni δ+ pair sites exhibited a remarkable product formation rate of 123 mol BA / mol metal /h for the hydrogenation of benzonitrile (BN) to benzylamine (BA). The heterogeneity of surface Ni atoms over the Ni 3 P crystal created two types of metal centers, Ni 0 and Ni δ+ , with a specific spatial distance of 4−5 Å. The Ni 0 site acted as the center for H 2 activation, while the Ni δ+ site served as the adsorption and activation center for the C ≡ N group. The highly efficient cooperation effect of Ni 0 −Ni δ+ pair sites resulted in a TOF of 2915 h −1 in BN hydrogenation, which is 2.4 and 9.7 times higher than that over the mono-Ni 0 and -Ni δ+ sites, respectively.

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“…Solid catalysts are used in a wide range of applications, such as steam reforming (Nichele et al, 2012;Bej et al, 2014), vehicle emissions control (Chen et al, 2018), ammonia synthesis (Zhou et al, 2013), Fischer-Tropsch synthesis (Louyot et al, 2018;Xu et al, 2020) and hydrogenation processes (Jadhav et al, 2014;Segobia et al, 2019;Li et al, 2020) to name a few. Such catalysts usually have a porous structure to maximise their surface area per unit of reactor volume (Sosna et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Terahertz pulsed imaging as a new method for investigating the liquid transport kinetics of α-alumina powder compacts

Al-Sharabi

Markl

Vivacqua

et al. 2021

Chemical Engineering Research and Design

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Effect of the catalyst preparation method on the performance of Ni-supported catalysts for the synthesis of saturated amines from nitrile hydrogenation

Cited by 15 publications

References 54 publications

Formation of diethylamine thermal ionization mass spectrum on NaAu_x intermetallide

Formation of diethylamine thermal ionization mass spectrum on NaAu_x intermetallide

Structural Ni⁰–Ni^δ+ Pair Sites for Highly Active Hydrogenation of Nitriles to Primary Amines

Terahertz pulsed imaging as a new method for investigating the liquid transport kinetics of α-alumina powder compacts

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Effect of the catalyst preparation method on the performance of Ni-supported catalysts for the synthesis of saturated amines from nitrile hydrogenation

Cited by 15 publications

References 54 publications

Formation of diethylamine thermal ionization mass spectrum on NaAux intermetallide

Formation of diethylamine thermal ionization mass spectrum on NaAux intermetallide

Structural Ni0–Niδ+ Pair Sites for Highly Active Hydrogenation of Nitriles to Primary Amines

Terahertz pulsed imaging as a new method for investigating the liquid transport kinetics of α-alumina powder compacts

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Product

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Formation of diethylamine thermal ionization mass spectrum on NaAu_x intermetallide

Formation of diethylamine thermal ionization mass spectrum on NaAu_x intermetallide

Structural Ni⁰–Ni^δ+ Pair Sites for Highly Active Hydrogenation of Nitriles to Primary Amines