Synthesis of in-situ surfactant-free Pd nanoparticle catalysts for the synthesis of aromatic azo compounds and for unsaturated bond hydrogenation by hydrogen transfer

Wang, Xin; Wang, Jiaqing; Qi, Fenqiang; Hu, Lei; Li, Xinming; Cao, Xueqin; Gu, Hongwei

doi:10.1016/s1872-2067(12)60665-2

Cited by 7 publications

(5 citation statements)

References 40 publications

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“…The versatile catalyst [Pd(OAc) 2 ] is also active in the TH of nitrobenzene to anilines, carbonyls to alcohols, and alkenes to alkanes that were carried out in a surfactant-free catalyst system using 2-PrOH as hydrogen donor. In this process, the real catalytic species are in situ formed palladium nanoparticles …”

Section: Recent Advances and Trends In Th Using Transition-metal Cata...mentioning

confidence: 99%

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The Golden Age of Transfer Hydrogenation

2015

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Section: Recent Advances and Trends In Th Using Transition-metal Cata...mentioning

confidence: 99%

“…In this process, the real catalytic species are in situ formed palladium nanoparticles. 573 2.1.9. Gold-Based Catalysts.…”

Section: Chemical Reviewsmentioning

confidence: 99%

The Golden Age of Transfer Hydrogenation

2015

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“…Subsequently, with the aid of a base, N 2 H 4 is activated and provides the activated hydrogen species for the hydrogenation of nitrobenzene to nitrosobenzene (step 1), which vigorously adsorbs on the defects . The nitrosobenzene undergoes a further hydrogenation step forming N -phenylhydroxylamine (step 2), which is promoted by NaOH, , and these two key intermediates then go through a coupling step forming azoxybenzene (step 3). After a following hydrogenation step, the final product, azobenzene, is produced (step 4).…”

Section: Results and Discussionmentioning

confidence: 99%

Nano-Cu Derived from a Copper Nitride Precatalyst for Reductive Coupling of Nitroaromatics to Azo Compounds

Du,

Duan,

Gao

et al. 2024

Inorg. Chem.

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The study of structural reconstruction is vital for the understanding of the real active sites in heterogeneous catalysis and guiding the improved catalyst design. Herein, we applied a copper nitride precatalyst in the nitroarene reductive coupling reaction and made a systematic investigation on the dynamic structural evolution behaviors and catalytic performance. This Cu3N precatalyst undergoes a rapid phase transition to nanostructured Cu with rich defective sites, which act as the actual catalytic sites for the coupling process. The nitride-derived defective Cu is very active and selective for azo formation, with 99.6% conversion of nitrobenzene and 97.1% selectivity to azobenzene obtained under mild reaction conditions. Density functional theory calculations suggest that the defective Cu sites play a role for the preferential adsorption of nitrosobenzene intermediates and significantly lowered the activation energy of the key coupling step. This work not only proposes a highly efficient noble-metal-free catalyst for nitroarenes coupling to valuable azo products but also may inspire more scientific interest in the study of the dynamic evolution of metal nitrides in different catalytic reactions.

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“…Meanwhile, our group has investigated a series of nano Pd catalysts for catalysis such as worm-like nano Pd [93] and Pd nanoclusters generated in situ [94,95]. Both of these showed high activity towards the synthesis of aromatic azo compounds.…”

Section: Au Pd Ag Nanostructures and Catalytic Applications In Omentioning

confidence: 99%

“…( A ) The TEM image of Pd nanoclusters generated in situ ; ( B ) The optical image of reactions before and after the formation of aromatic azo compounds; ( C ) The formation of aromatic azo compounds using Pd nanoclusters generated in situ as catalysts [94,95]. …”

Section: Au Pd Ag Nanostructures and Catalytic Applications In Omentioning

confidence: 99%

Novel Metal Nanomaterials and Their Catalytic Applications

Wang

2015

Molecules

Self Cite

104

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Abstract:In the rapidly developing areas of nanotechnology, nano-scale materials as heterogeneous catalysts in the synthesis of organic molecules have gotten more and more attention. In this review, we will summarize the synthesis of several new types of noble metal nanostructures (FePt@Cu nanowires, Pt@Fe2O3 nanowires and bimetallic Pt@Ir nanocomplexes; Pt-Au heterostructures, Au-Pt bimetallic nanocomplexes and Pt/Pd bimetallic nanodendrites; Au nanowires, CuO@Ag nanowires and a series of Pd nanocatalysts) and their new catalytic applications in our group, to establish heterogeneous catalytic system in "green" environments. Further study shows that these materials have a higher catalytic activity and selectivity than previously reported nanocrystal catalysts in organic reactions, or show a superior electro-catalytic activity for the oxidation of methanol. The whole process might have a great impact to resolve the energy crisis and the environmental crisis that were caused by traditional chemical engineering. Furthermore, we hope that this article will provide a reference point for the noble metal nanomaterials' development that leads to new opportunities in nanocatalysis.

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Synthesis of in-situ surfactant-free Pd nanoparticle catalysts for the synthesis of aromatic azo compounds and for unsaturated bond hydrogenation by hydrogen transfer

Cited by 7 publications

References 40 publications

The Golden Age of Transfer Hydrogenation

The Golden Age of Transfer Hydrogenation

Nano-Cu Derived from a Copper Nitride Precatalyst for Reductive Coupling of Nitroaromatics to Azo Compounds

Novel Metal Nanomaterials and Their Catalytic Applications

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