Renewable Cyclopentanol From Catalytic Hydrogenation-Rearrangement of Biomass Furfural Over Ruthenium-Molybdenum Bimetallic Catalysts

Biomass furfural-like compounds are chemicals that cannot be extracted from fossil materials, through which a large number of fine chemicals and fuel additives can be opened up, but one big efficiency problem during the transformation is the accumulation of oligomers. Here, we propose a novel and efficient Ru-Mo bimetallic catalyst for selective hydrogenation-rearrangement of furfural-like compounds. The result showed that an unprecedented rearrangement product selectivity of 89.1% to cyclopentanol was achieved under an optimized reaction condition over a 1%Ru−2.5%Mo/CNT catalyst reduced at 600°C. Subsequent characterization suggested that the catalyst presented with weak acidity and strong hydrogenation activity for the reaction, which not only ensures the smooth hydrogenation-rearrangement reaction but also inhibits the accumulation of furan polymers. These findings provide a convenient strategy to tune the catalytic performance of Mo-based catalysts by controlling the reduction and carburization conditions, which appear to be versatile for the rearrangement of furans and similar compounds.

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Remarkable crystal phase effect of Cu/TiO2catalysts on the selective hydrogenation of dimethyl oxalate

RSC Advances ◽

10.1039/c5ra00053j ◽

2015 ◽

Vol 5 (37) ◽

pp. 29040-29047 ◽

Cited By ~ 9

Author(s):

Bin Wang ◽

Chao Wen ◽

Yuanyuan Cui ◽

Xi Chen ◽

Yu Dong ◽

...

Keyword(s):

Catalytic Hydrogenation ◽

Selective Hydrogenation ◽

Catalytic Performance ◽

Crystal Phase ◽

Phase Effect ◽

Dimethyl Oxalate ◽

Support Interaction ◽

Metal Support Interaction ◽

Metal Support ◽

Titania Support

Crystal phase of titania support plays an important role in catalytic hydrogenation of dimethyl oxalate. Optimized catalytic performance was achieved for the Cu/P25 due to the intimate metal support interaction.

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Effects of Promoters on Properties of Cu-Zn-Al Catalyst for Selective Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.393-395.1185 ◽

2011 ◽

Vol 393-395 ◽

pp. 1185-1188

Author(s):

Chang You Li ◽

Xiao Yan Li ◽

Yi Fei Guo

Keyword(s):

Catalytic Activity ◽

Reaction Time ◽

Catalytic Hydrogenation ◽

Selective Hydrogenation ◽

Reaction Rate ◽

Steric Effect ◽

Cinnamyl Alcohol ◽

Active Centers ◽

Hydrogenation Activity

Cu-Zn-Al catalyst was modified by the additives such as Ni and Mn, and the prepared catalyst was employed in the selective catalytic hydrogenation of cinnamaldehyde. The results showed that the addition of Ni could improve catalytic activity significantly, moreover, the improving effect was highest when Zn was replaced by Ni, simultaneously leading to excessive hydrogenation. The Cu-(5%)Mn-Zn-Al catalyst exhibited a higher selectivity of 93.6% for C = O bond to cinnamyl alcohol and hydrogenation activity of 33.0% conversion at 130°C under 1.0 MPa of H2 pressure with the reaction time of 1 h. TPR and XRD characterization showed that Mn promoter was favorable for the growth of Cu0 fine grains on the surface of catalyst, which not only led to steric effect which improved the selectivity for cinnamyl alcohol, but also reduced the numbers of active centers, consequently decreased the reaction rate.

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Nanopowder-Supported Ultra-Low Content Co–Rh Bimetallic Catalysts for Hydroformylation of Monoformyltricyclodecenes to Value-Added Fine Chemicals

Progress in Reaction Kinetics and Mechanism ◽

10.3184/146867818x15319903829173 ◽

2018 ◽

Vol 43 (3-4) ◽

pp. 254-261

Author(s):

Chengyang Li ◽

Libo Zhang ◽

Yubo Ma ◽

Tianfu Wang

Keyword(s):

Reaction Temperature ◽

Bimetallic Catalysts ◽

Active Sites ◽

Value Added ◽

Catalytic Performance ◽

Fine Chemicals ◽

Co Catalysts ◽

Incipient Wetness ◽

Incipient Wetness Method

The hydroformylation of monoformyltricyclodecenes (MFTD) to diformyltricyclodecanes (DFTD) was studied systematically. A series of 0.006 wt% Rh–0.006 wt% Co catalysts supported on commercially available nanopowders such as Al2O3, ZnO, TiO2 and CeO2 was prepared by the incipient wetness method and used to catalyse the hydroformylation of MFTD to DFTD. The 0.006 wt% Rh–0.006 wt% Co/ZnO catalyst showed the highest catalytic performance among the catalysts investigated, thus 41.8% DFTD yield with 100% DFTD selectivity could be achieved. This suggested that there may be a key role of the carrier on the catalytic performance in MFTD hydroformylation. Furthermore, the kinetic profiles for MFTD hydroformylation over the 0.006 wt% Rh–0.030 wt% Co/ZnO catalyst have been examined systematically to explore the effect of reaction temperature on the catalytic performance. These results collectively suggested that a particular reaction temperature might benefit MFTD hydroformylation. There may be some agglomeration of the active sites at higher reaction temperatures.

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

RSC Advances ◽

10.1039/c5ra10231f ◽

2015 ◽

Vol 5 (71) ◽

pp. 57277-57285 ◽

Cited By ~ 4

Author(s):

Chang Liu ◽

Xiaodan Li ◽

Tiefeng Wang

Keyword(s):

Catalytic Hydrogenation ◽

Bimetallic Catalysts ◽

Bimetallic Catalyst ◽

Metal Interaction ◽

Enhanced Activity

The Ni–Fe/γ-Al2O3 bimetallic catalyst showed enhanced activity and m-XDA selectivity in hydrogenation of IPN, due to strong N–metal interaction and weak H adsorption strength.

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Highly efficient selective hydrogenation of levulinic acid to γ-valerolactone over Cu–Re/TiO2 bimetallic catalysts

RSC Advances ◽

10.1039/d1ra05804e ◽

2022 ◽

Vol 12 (1) ◽

pp. 602-610

Author(s):

Yingxin Liu ◽

Kai Liu ◽

Meihua Zhang ◽

Kaiyue Zhang ◽

Jiao Ma ◽

...

Keyword(s):

Liquid Phase ◽

Selective Hydrogenation ◽

Bimetallic Catalysts ◽

Levulinic Acid ◽

Bimetallic Catalyst ◽

Highly Efficient ◽

Liquid Phase Hydrogenation

Herein, we report a highly efficient and recyclable Cu–Re(1 : 1)/TiO2 bimetallic catalyst for liquid phase hydrogenation of levulinic acid to γ-valerolactone.

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Ru–Ni/Al2O3 bimetallic catalysts with high catalytic activity for N-propylcarbazole hydrogenation

Catalysis Science & Technology ◽

10.1039/c9cy02528f ◽

2020 ◽

Vol 10 (7) ◽

pp. 2268-2276 ◽

Cited By ~ 3

Author(s):

Chenguang Li ◽

Ming Yang ◽

Zhenjie Liu ◽

Zhenlin Zhang ◽

Ting Zhu ◽

...

Keyword(s):

Activation Energy ◽

Catalytic Activity ◽

Catalytic Hydrogenation ◽

Bimetallic Catalysts ◽

High Catalytic Activity ◽

Hydrogenation Activity

The as-prepared 5 wt% Ru2.5Ni2.5/Al2O3 catalyst shows the best catalytic hydrogenation activity for NPCZ and the lowest hydrogenation activation energy.

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Catalytic Hydrogenation of Nitrate Ions over Pd-Cu/ZSM-5 Catalyst

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.197-198.967 ◽

2011 ◽

Vol 197-198 ◽

pp. 967-971 ◽

Cited By ~ 2

Author(s):

Wen Liang Gao ◽

Fang Li

Keyword(s):

Bimetallic Catalysts ◽

Reduction Method ◽

Bimetallic Catalyst ◽

Chemical Reduction ◽

Catalytic Performance ◽

Nitrite Reduction ◽

Molar Ratio ◽

Chemical Reduction Method ◽

Nitrate Ions ◽

Mild Conditions

Palladium-copper bimetallic catalysts supported over different supporters were prepared by chemical reduction method, and their catalytic performance was investigated with the hydrogenation of nitrate ions in drinking water under mild conditions. The results show that Pd-Cu/ZSM-5 bimetallic catalyst has the highest catalytic activity among all used catalysts. In addition, nitrate conversion influenced by metal content, metal molar ratio (Pd:Cu) and the addition of CO2 are also discussed. It is well established that the addition of CO2 has changed the reduction path of the intermediate nitrite, but is no influence on the steps of nitrate-to-nitrite reduction. In the end, the mechanism of catalytic nitrate reduction was discussed on the basis the literature results.

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Network-Like Platinum Nanosheets Enabled by a Calorific-Effect-Induced-Fusion Strategy for Enhanced Catalytic Hydrogenation Performance

Frontiers in Chemistry ◽

10.3389/fchem.2021.818900 ◽

2022 ◽

Vol 9 ◽

Author(s):

Ting-Wen Chen ◽

Da-Wei Pang ◽

Jian-Xin Kang ◽

Dong-Feng Zhang ◽

Lin Guo

Keyword(s):

Catalytic Hydrogenation ◽

Graphite Oxide ◽

Bimetallic Catalysts ◽

Pt Nanoparticles ◽

Turnover Frequency ◽

Fusion Strategy ◽

Hydrogenation Activity ◽

Reduced Graphite Oxide ◽

Loading Amount

In this paper, we report the construction of network-like platinum (Pt) nanosheets based on Pt/reduced graphite oxide (Pt/rGO) hybrids by delicately utilizing a calorific-effect-induced-fusion strategy. The tiny Pt species first catalyzed the H2-O2 combination reaction. The released heat triggered the combustion of the rGO substrate under the assistance of the Pt species catalysis, which induced the fusion of the tiny Pt species into a network-like nanosheet structure. The loading amount and dispersity of Pt on rGO are found to be crucial for the successful construction of network-like Pt nanosheets. The as-prepared products present excellent catalytic hydrogenation activity and superior stability towards unsaturated bonds such as olefins and nitrobenzene. The styrene can be completely converted into phenylethane within 60 min. The turnover frequency (TOF) value of network-like Pt nanosheets is as high as 158.14 h−1, which is three times higher than that of the home-made Pt nanoparticles and among the highest value of the support-free bimetallic catalysts ever reported under similar conditions. Furthermore, the well dispersibility and excellent aggregation resistance of the network-like structure endows the catalyst with excellent recyclability. The decline of conversion could be hardly identified after five times recycling experiments.

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Structure and composition of metal particles in Pt-Sn/Al2O3 bimetallic catalysts

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100174527 ◽

1990 ◽

Vol 48 (4) ◽

pp. 278-279

Author(s):

A. Sachdev ◽

J. Schwank

Keyword(s):

Bimetallic Catalysts ◽

Bimetallic Catalyst ◽

Size Structure ◽

High Surface ◽

High Surface Area ◽

Metal Particles ◽

Alloy Formation ◽

Particle Size Range ◽

Oxide Supports ◽

Petroleum Fractions

Platinum - tin bimetallic catalysts have been primarily utilized in the chemical industry in the catalytic reforming of petroleum fractions. In this process the naphtha feedstock is converted to hydrocarbons with higher octane numbers and high anti-knock qualities. Most of these catalysts contain small metal particles or crystallites supported on high surface area insulating oxide supports. The determination of the structure and composition of these particles is crucial to the understanding of the catalytic behavior. In a bimetallic catalyst it is important to know how the two metals are distributed within the particle size range and in what way the addition of a second metal affects the size, structure and composition of the metal particles. An added complication in the Pt-Sn system is the possibility of alloy formation between the two elements for all atomic ratios.

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Nanometer Scale Spectroscopic Visualization of Catalytic Sites During a Hydrogenation Reaction on a Pd/Au Bimetallic Catalyst

10.26434/chemrxiv.12346823.v3 ◽

2020 ◽

Author(s):

hao yin ◽

Liqing Zheng ◽

Wei Fang ◽

Yin-Hung Lai ◽

Nikolaus Porenta ◽

...

Keyword(s):

Catalytic Hydrogenation ◽

Density Functional ◽

Hydrogen Transfer ◽

Bimetallic Catalyst ◽

Local Environment ◽

Hydrogenation Reaction ◽

Boundary Density ◽

Catalytic Sites ◽

Powerful Analytical Tool ◽

Tip Enhanced Raman Spectroscopy

Understanding the mechanism of catalytic hydrogenation at the local environment requires chemical and topographic information involving catalytic sites, active hydrogen species and their spatial distribution. Here, tip-enhanced Raman spectroscopy (TERS) was employed to study the catalytic hydrogenation of chloro-nitrobenzenethiol on a well-defined Pd(sub-monolayer)/Au(111) bimetallic catalyst (pH2=1.5 bar, 298 K), where the surface topography and chemical fingerprint information were simultaneously mapped with nanoscale resolution (≈10 nm). TERS imaging of the surface after catalytic hydrogenation confirms that the reaction occurs beyond the location of Pd sites. The results demonstrate that hydrogen spillover accelerates hydrogenation at the Au sites within 20 nm from the bimetallic Pd/Au boundary. Density functional theory was used to elucidate the thermodynamics of interfacial hydrogen transfer. We demonstrate that TERS as a powerful analytical tool provides a unique approach to spatially investigate the local structure-reactivity relationship in catalysis.

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