Activated nanostructured bimetallic catalysts for C–C coupling reactions: recent progress

Kumar, Rohit; Tyagi, Deepika; Gupta, Kirti; Singh, Sanjay Kumar

doi:10.1039/c5cy02225h

Cited by 83 publications

(49 citation statements)

References 128 publications

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“…[112][113] In addition, to efficiently reuse the bimetallic NPs, the leaching/dissolution problem should be tackled. 41 In particular, bimetallic NPs containing Pd commonly exhibited leaching behavior in catalysis, [114][115] which has also been intensively investigated and well documented in monometallic Pd NPs. [116][117] Continued investigation into specific catalytic mechanisms on NP surfaces, especially in the presence of adsorbates, is another frontier.…”

Section: Discussionmentioning

confidence: 99%

Controllable Catalysis with Nanoparticles: Bimetallic Alloy Systems and Surface Adsorbates

2016

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Transition metal nanoparticles are privileged materials in catalysis due to their high specific surface areas and abundance of active catalytic sites. While many of these catalysts are quite useful, we are only beginning to understand the underlying catalytic mechanisms. Opening the "black box" of nanoparticle catalysis is essential to achieve the ultimate goal of catalysis by design. In this Perspective we highlight recent work addressing the topic of controlled catalysis with bimetallic alloy and "designer" adsorbate-stabilized metal nanoparticles.

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Section: Discussionmentioning

confidence: 99%

Controllable Catalysis with Nanoparticles: Bimetallic Alloy Systems and Surface Adsorbates

2016

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“…As mentioned in reported studies, during adsorption of O 2 on Pd nanoparticles, electrons transfer from the metal to π* antibonding orbital of O 2 , and hence a highly electron rich Pd could also facilitate activation of O 2 . DFT calculations revealed the electronic charge transfer from Ni (lower ionization energy than Pd) to Pd in bimetallic Ni‐Pd nanoparticles resulted in an electron‐rich Pd as compare to monometallic Pd nanoparticles . Therefore, it resulted in a facile O 2 adsorption on electron rich Pd surface, and hence enhanced catalytic activity of Ni 0.90 Pd 0.10 catalyst for the oxidation of furans was achieved.…”

Section: Catalytic Oxidation Of Biomass‐derived Furfural and Hmf Overmentioning

confidence: 99%

Metal Catalysts for the Efficient Transformation of Biomass‐derived HMF and Furfural to Value Added Chemicals

2018

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Catalytic transformation of biomass‐derived compounds to different platform chemicals and liquid fuel is a prominent way to reduce the global dependence on fossil resources. In past few decades, biomass‐derived furans such as 2‐furfuraldehyde (furfural) and 5‐hydroxymethyl‐2‐furfural (HMF) have received outstanding attention because of their wide applications in the production of various industrially important value‐added chemicals and fuel components. Various catalytic systems and methodologies have been extensively explored for the transformation of these furans to a wide range of products including open ring diketones, ketoacids, alcohols and long chain alkanes. This Review is aimed to provide an extensive overview of the recent developments of several high‐performing heterogeneous catalysts for the catalytic upgradation of the key biomass‐derived furans (furfural and HMF) to value‐added chemicals. Moreover, the role of these catalysts in the catalytic transformations including hydrogenation, decarbonylation, oxidation, hydrogenolysis and ring opening reactions, and the mechanistic pathways are also highlighted in this Review.

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“…The electron interactions between two metal atoms, which are electron-rich, just as the heterometallic bonding interactions change the surface electronic properties of the nanoparticles [12][13][14][15][16][17][18][19]. As a rule, the catalytic behaviour is usually enhanced on bimetallic nanoparticles as compared to monometallic nanoparticles [3,7,[13][14][15][17][18][19][20][21] even at low Rai et al [46] suggest that the synergic cooperation between the two metals is more noticeable in alloyed nanoparticles, due to the higher probability of metal-metal interactions in comparison to core-shell ones.…”

Section: Bimetallic Nanoparticles As Catalystsmentioning

confidence: 99%

On Metal Segregation of Bimetallic Nanocatalysts Prepared by a One-Pot Method in Microemulsions

2017

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A comparative study on different bimetallic nanocatalysts prepared from microemulsions using a one-pot method has been carried out. The analysis of experimental observations, complemented by simulation studies, provides detailed insight into the factors affecting nanoparticle architecture: (1) The metal segregation in a bimetallic nanocatalysts is the result of the combination of three main kinetic parameters: the reduction rate of metal precursors (related to reduction standard potentials), the material intermicellar exchange rate (determined by microemulsion composition), and the metal precursors concentration; (2) A minimum difference between the reduction standard potentials of the two metals of 0.20 V is needed to obtain a core-shell structure. For values ∆ε 0 smaller than 0.20 V the obtaining of alloys cannot be avoided, neither by changing the microemulsion nor by increasing metal concentration; (3) As a rule, the higher the film flexibility around the micelles, the higher the degree of mixture in the nanocatalyst; (4) A minimum concentration of metal precursors is required to get a core-shell structure. This minimum concentration depends on the microemulsion flexibility and on the difference in reduction rates.

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Activated nanostructured bimetallic catalysts for C–C coupling reactions: recent progress

Abstract: This minireview highlights the recent progress made in the last decade towards the development of activated bimetallic alloy nanoparticle catalysts for C–C coupling reactions, including asymmetric C–C bond coupling reactions.

Cited by 83 publications

References 128 publications

Controllable Catalysis with Nanoparticles: Bimetallic Alloy Systems and Surface Adsorbates

Controllable Catalysis with Nanoparticles: Bimetallic Alloy Systems and Surface Adsorbates

Metal Catalysts for the Efficient Transformation of Biomass‐derived HMF and Furfural to Value Added Chemicals

On Metal Segregation of Bimetallic Nanocatalysts Prepared by a One-Pot Method in Microemulsions

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