Effect of the amine group content on catalytic activity and stability of mesoporous silica supported Pd catalysts for additive-free formic acid dehydrogenation at room temperature

Jin, Min Ho; Park, Ju Hyoung; Oh, Duckkyu; Park, Jong Soo; Lee, Kwan Young; Lee, Dong Hoon

doi:10.1016/j.ijhydene.2018.12.208

Cited by 44 publications

(37 citation statements)

References 46 publications

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“…A comparatively similar interaction between palladium nanoparticles and nitrogen-containing supports was reported in several articles devoted to palladium nanostructured materials synthesis and characterization [24,46,47]. Typically, a Pd charging by amino groups has a positive influence on hydrogen chemisorption on active metal that can have a positive effect on the hydrogenation of the substrate [24,46,47]. The presence of quantities of aliphatic carbon compounds in silica is a result of the inclusion of an aminopropyl substituent in the silica structure, and the incomplete hydrolysis of silane and carbon pollution.…”

Section: Xps Of Catalysts Before the Reactionsupporting

confidence: 76%

“…A drastic increase in the catalytic activity for Pd/SiO 2 -C 3 H 6 -(30%)NH 2 sample compared to Pd/SiO 2 can be subscribed to an increase in the active surface as a result of some decrease in Pd nanoparticles' average diameter. However, Pd nanoparticles' surface modification by aminogroups and a sift in electron density to Pd nanoparticles can be the main reason for the increase in Pd activity [24,46,47].…”

Section: The Activity Of Synthesized Catalystsmentioning

confidence: 99%

“…The aminopropyl groups provide a unique possibility for further surface modification. Amino groups' modified supports are very useful for further surface nucleophilic substitution and obtaining the highest metal dispersion and study of this effect is a sufficiently novel trend in catalysis [4,19,20,[22][23][24][25]. A lot of articles are dedicated to the application of amino-functionalized mesoporous silica in medicine, pharmaceutics and smart materials, however, publications on their influence on active metals' catalytic properties and smart materials, however, publications on their influence on active metals' catalytic properties are fragmental [26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

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Amino-Modified Silica as Effective Support of the Palladium Catalyst for 4-Nitroaniline Hydrogenation

et al. 2020

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The article describes the synthesis of aminoorgano-functionalized silica as a prospective material for catalysis application. The amino groups have electron donor properties which are valuable for the metal chemical state of palladium. Therefore, the presence of electron donor groups is important for increasing catalysts’ stability. The research is devoted to the investigation of silica amino-modified support influence on the activity and stability of palladium species in 4-nitroaniline hydrogenation process. A series of catalysts with different supports such as SiO2, SiO2-C3H6-NH2 (amino-functionalized silica), γ-Al2O3 and activated carbon were studied. The catalytic activity was studied in the hydrogenation of 4-nitroaniline to 1,4-phenylenediamine. The catalysts were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and chemisorption of hydrogen by the pulse technique. The 5 wt.% Pd/SiO2-C3H6-NH2 catalyst exhibited the highest catalytic activity for 4-nitroaniline hydrogenation with 100% conversion and 99% selectivity with respect to 1,4-phenylenediamine.

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Section: Xps Of Catalysts Before the Reactionsupporting

confidence: 76%

Section: The Activity Of Synthesized Catalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Amino-Modified Silica as Effective Support of the Palladium Catalyst for 4-Nitroaniline Hydrogenation

et al. 2020

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“…Figure 10. The higher the concentration of amino groups on the matrix surface was fixed, the more active was the palladium deposited on the silica matrix [24].…”

Section: 3mentioning

confidence: 99%

“…The aminopropyl groups presence a unique possibility for further surface modification. Amino groups modified supports are very useful for further surface nucleophilic substitution and obtaining the highest metal dispersion and study of this effect is sufficiently novel trend in catalysis [4,19,20,[22][23][24][25]. A lot of articles are dedicated to application of amino functionalized mesoporous silica in medicine, pharmaceutics and smart materials, however publications on their influence on active metals catalytic properties are fragmental [26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Amino-modified Silica as Effective Support of the Palladium Catalyst of Hydrogenation

Latypova¹,

Lebedev²,

Rumyantsev³

et al. 2020

Preprint

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The article describes synthesis of aminoorgano-functionalized silica as a perspective material for catalysis application. The amino groups have electron donor properties valuable for metal chemical state of palladium. So presence of electron donor groups is important for increasing of catalysts stability. The research is devoted to investigation of silica amino-modified support influence on activity and stability of palladium species in 4-nitroaniline hydrogenation process. A series of catalysts with different supports such as SiO2, SiO2-C3H6-NH2 (amino-functionalized silica), γ-Al2O3 and activated carbon were studied. The catalytic activity was studied in the hydrogenation of 4-nitroaniline to 1,4-phenylenediamine. The catalysts were characterized by scanning electron microscopy, transmission electron microscopy, x-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and pulse chemisorption of hydrogen. The 5 wt. % Pd/SiO2-C3H6-NH2 catalyst exhibited the highest catalytic activity for 4-nitroaniline hydrogenation with 100% conversion and 99% selectivity with respect to 1,4-phenylenediamine.

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Nanopore‐Supported Metal Nanocatalysts for Efficient Hydrogen Generation from Liquid‐Phase Chemical Hydrogen Storage Materials

et al. 2020

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Effect of the amine group content on catalytic activity and stability of mesoporous silica supported Pd catalysts for additive-free formic acid dehydrogenation at room temperature

Cited by 44 publications

References 46 publications

Amino-Modified Silica as Effective Support of the Palladium Catalyst for 4-Nitroaniline Hydrogenation

Amino-Modified Silica as Effective Support of the Palladium Catalyst for 4-Nitroaniline Hydrogenation

Amino-modified Silica as Effective Support of the Palladium Catalyst of Hydrogenation

Nanopore‐Supported Metal Nanocatalysts for Efficient Hydrogen Generation from Liquid‐Phase Chemical Hydrogen Storage Materials

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