Characterization and Nitrile Group Hydrogenation Study of Supported and Unsupported Ru–Co Catalyst

Kusaka, Haruhiko; Hara, Yoshinori; Onuki, Masamichi; Akai, Toshio; Okuda, Masakazu

doi:10.1006/jcat.1996.0166

Cited by 14 publications

(11 citation statements)

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“…[28][29][30][31][32][33] Yadav et al 14 studied the SiO 2 supported Ni, Ni-Fe and Ni-Cu catalysts in the liquid-phase hydrogenation of benzonitrile, cinnamonitrile, crotononitrile and butyronitrile. [28][29][30][31][32][33] Yadav et al 14 studied the SiO 2 supported Ni, Ni-Fe and Ni-Cu catalysts in the liquid-phase hydrogenation of benzonitrile, cinnamonitrile, crotononitrile and butyronitrile.…”

Section: Introductionmentioning

confidence: 99%

“…Bimetallic catalysts have been widely used to promote the catalytic performance of the active metal. [28][29][30][31][32][33] Yadav et al 14 studied the SiO 2 supported Ni, Ni-Fe and Ni-Cu catalysts in the liquid-phase hydrogenation of benzonitrile, cinnamonitrile, crotononitrile and butyronitrile. The results showed that the Ni monometallic catalyst and bimetallic catalysts showed the same selectivity but different activity, which was attributed to the structural and electronic effects of the bimetallic alloy.…”

Section: Introductionmentioning

confidence: 99%

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Catalytic hydrogenation of isophthalonitrile (IPN) over supported monometallic and bimetallic catalysts

Liu

Wang

2015

RSC Adv.

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The hydrogenation of Isophthalonitrile (IPN) to meta-xylylenediamine (m-XDA) is usually catalyzed by RANEY® or supported Ni based catalysts in the presence of a basic additive. The supported catalysts have better mechanical strength and are safer than RANEY® Ni catalysts. This work aimed to study the catalytic performance of g-Al 2 O 3 supported Ni and Ni-M (M ¼ Fe, Co, Cu) bimetallic catalysts in IPN hydrogenation. The H 2 -TPR results revealed that the introduction of a second metal enhanced the reducibility of Ni catalyst. The Ni-M bimetallic catalysts also had different metal dispersion, electronic properties and adsorption strength. Among Fe, Co and Cu, Fe showed the best promoting effect, which was attributed to the strong N-metal bonding and weak H-metal adsorption strength, which enhanced the catalytic activity and m-XDA selectivity. The catalytic performance also strongly depended on the Ni-Fe mass ratio. For the g-Al 2 O 3 supported Ni and Ni-M catalysts with a low Ni loading of 5 wt%, the rate constant k r increased from 0.024 mol 0.2 L À0.2 min À1 over 5Ni/Al 2 O 3 to 0.033 mol 0.2 L À0.2 min À1 over 5Ni-1.67Fe/Al 2 O 3 , meanwhile the m-XDA selectivity increased from 34.7% to 49.5%. Over the Ni-Fe bimetallic catalyst with high metal loading, 20Ni-5Fe/Al 2 O 3 , a very high m-XDA selectivity of 99.9% was obtained. Fig. 5 Effect of the Ni-Fe ratio on catalytic performance of Ni-Fe/ Al 2 O 3 catalysts (a) Ni + Fe ¼ 6.25 wt%, (b) Ni ¼ 5 wt%.This journal is

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Catalytic hydrogenation of isophthalonitrile (IPN) over supported monometallic and bimetallic catalysts

Liu

Wang

2015

RSC Adv.

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“…Taking into account that the main reduction peak of Co oxides in the monometallic Co/TiO 2 occurred at 440 °C, the disappearance of reduction peak due to Co oxides would be indicating a strong interaction between Ru and Co. The Ru addition in the bimetallic Ru-Co catalysts was reported to lower the reduction temperature of Co oxides 49 , 50 . This phenomenon could be explained that the Ru oxides would be firstly reduced to Ru metals at rather lower temperature and then the dissociative adsorption of H 2 on the Ru metals caused the H spillover to Co oxides resulting in the reduction of Co oxides to Co metals.…”

Section: Resultsmentioning

confidence: 98%

Effects of TiO2 structure and Co addition as a second metal on Ru-based catalysts supported on TiO2 for selective hydrogenation of furfural to FA

Tolek

Nanthasanti

Pongthawornsakun

et al. 2021

Sci Rep

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The TiO2 supported Ru-based catalysts were prepared with 1.5 wt% Ru and 0–0.8 wt% Co on various TiO2 (anatase, rutile, P-25, and sol–gel TiO2) and studied in the liquid-phase selective hydrogenation of furfural to furfuryl alcohol (FA) under mild conditions (50 °C and 2 MPa H2). The presence of high anatase crystallographic composition on TiO2 support was favorable for enhancing hydrogenation activity, while the strong interaction between Ru and TiO2 (Ru–TiOx sites) was required for promoting the selectivity to FA. The catalytic performances of bimetallic Ru–Co catalysts were improved with increasing Co loading due to the synergistic effect of Ru–Co alloying system together with the strong interaction between Ru and Co as revealed by XPS, H2-TPR, and TEM–EDX results. The enhancement of reducibility of Co oxides in the bimetallic Ru–Co catalysts led to higher hydrogenation activity with the Ru–0.6Co/TiO2 catalyst exhibited the best performances in FA selective hydrogenation of furfural to FA under the reaction conditions used.

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“…[1][2][3][4][5][6][7][8] Selectivity for primary amines is a crucial problem in the preparation of amines because of the facile formation of secondary and tertiary amines under the reaction conditions. Co, Ni, and Ru tend to be selective for primary amines, 15,16,18,[20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] whereas Cu and Rh are selective for secondary amines, 15,22 and Pd and Pt are selective for tertiary amines. There are several reports of nitrile hydrogenation in liquid phases without ammonia or basic additives.…”

Section: Introductionmentioning

confidence: 99%

“…[14][15][16][17][18][19][20][21][22][23][24] Several transition metals, for example, Co, Ni, Ru, Rh, Cu, Pd, and Pt, have been investigated as active catalysts for nitrile hydrogenation. Co, Ni, and Ru tend to be selective for primary amines, 15,16,18,[20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] whereas Cu and Rh are selective for secondary amines, 15,22 and Pd and Pt are selective for tertiary amines. 21,27,[38][39][40] Several Ru complexes are selective catalysts for nitrile hydrogenation to primary amines, including Ru(cod)(methylallyl) 2 (cod = 1,5cyclooctadiene) and imidazolylphosphine ligand systems, 30 Ru(Z 6 -C 6 H 6 ){(XyN-o-C 6 H 4 ) 2 S} (Xy = 3,5-Me 2 C 6 H 3 ) and PCy 3 (Cy = cyclohexyl) ligand systems 31 and RuH 2 (Z 2 -H 2 ) 2 (PCyp 3 ) 2 (Cyp = cyclopentyl).…”

Section: Introductionmentioning

confidence: 99%

Formation and nitrile hydrogenation performance of Ru nanoparticles on a K-doped Al₂O₃ surface

Muratsugu

Kityakarn

Wang

et al. 2015

Phys. Chem. Chem. Phys.

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Decarbonylation-promoted Ru nanoparticle formation from Ru3(CO)12 on a basic K-doped Al2O3 surface was investigated by in situ FT-IR and in situ XAFS. Supported Ru3(CO)12 clusters on K-doped Al2O3 were converted stepwise to Ru nanoparticles, which catalyzed the selective hydrogenation of nitriles to the corresponding primary amines via initial decarbonylation, the nucleation of the Ru cluster core, and the growth of metallic Ru nanoparticles on the surface. As a result, small Ru nanoparticles, with an average diameter of less than 2 nm, were formed on the support and acted as efficient catalysts for nitrile hydrogenation at 343 K under hydrogen at atmospheric pressure. The structure and catalytic performance of Ru catalysts depended strongly on the type of oxide support, and the K-doped Al2O3 support acted as a good oxide for the selective nitrile hydrogenation without basic additives like ammonia. The activation of nitriles on the modelled Ru catalyst was also investigated by DFT calculations, and the adsorption structure of a nitrene-like intermediate, which was favourable for high primary amine selectivity, was the most stable structure on Ru compared with other intermediate structures.

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Characterization and Nitrile Group Hydrogenation Study of Supported and Unsupported Ru–Co Catalyst

Cited by 14 publications

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Catalytic hydrogenation of isophthalonitrile (IPN) over supported monometallic and bimetallic catalysts

Catalytic hydrogenation of isophthalonitrile (IPN) over supported monometallic and bimetallic catalysts

Effects of TiO2 structure and Co addition as a second metal on Ru-based catalysts supported on TiO2 for selective hydrogenation of furfural to FA

Formation and nitrile hydrogenation performance of Ru nanoparticles on a K-doped Al₂O₃ surface

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Characterization and Nitrile Group Hydrogenation Study of Supported and Unsupported Ru–Co Catalyst

Cited by 14 publications

References 0 publications

Catalytic hydrogenation of isophthalonitrile (IPN) over supported monometallic and bimetallic catalysts

Catalytic hydrogenation of isophthalonitrile (IPN) over supported monometallic and bimetallic catalysts

Effects of TiO2 structure and Co addition as a second metal on Ru-based catalysts supported on TiO2 for selective hydrogenation of furfural to FA

Formation and nitrile hydrogenation performance of Ru nanoparticles on a K-doped Al2O3 surface

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Formation and nitrile hydrogenation performance of Ru nanoparticles on a K-doped Al₂O₃ surface