Robust Co3O4 nanocatalysts supported on biomass-derived porous N-doped carbon toward low-pressure hydrogenation of furfural

Zhang, Lin; Cheng, Lanlan; Hu, Yechen; Xiao, Qingguang; Chen, Xiufang; Lü, Wangyang

doi:10.1007/s11706-023-0645-9

Cited by 5 publications

(3 citation statements)

References 57 publications

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“…As a result, spherical hydrochars with a uniform size of about 20 nm were formed during the hydrothermal carbonization process (Figure S1). Then, the obtained hydrochars were further pyrolyzed at 550 • C under an N 2 atmosphere to improve the graphitization degree and retain plentiful oxygen-containing functional groups [32,33]. Moreover, a large number of small molecular gases (e.g., CO, CO 2 , and H 2 O) were released to generate many pores during this carbonization process [34].…”

Section: Characterization Of the Catalystmentioning

confidence: 99%

Boosting Solvent-Free Aerobic Oxidation of Benzylic Compounds into Ketones over Au-Pd Nanoparticles Supported by Porous Carbon

Sun,

Peng,

Guo

et al. 2024

Catalysts

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The exploitation of highly efficient solvent-free catalytic systems for the selective aerobic oxidation of benzylic compounds to produce corresponding ketones with molecular oxygen under mild conditions remains a great challenge in the chemical industry. In this work, Au-Pd nanoparticles supported on porous carbon catalysts were fabricated by the borax-mediated hydrothermal carbonization method and the chemical reduction method. The physicochemical properties of Au-Pd bimetallic samples were examined by XRD, N2 sorption, SEM, TEM, and XPS techniques. The Au-Pd nanoparticles have successfully immobilized on the spherical carbon support with a porous structure and large surface area. A solvent-free catalytic oxidation system was constructed to selectively convert indane into indanone with Au-Pd nanocatalysts and O2. In contrast with a monometallic Au or Pd catalyst, the resulting bimetallic Au-Pd catalyst could effectively activate O2 and exhibit improved catalytic activity in the controlled oxidation of indane into indanone under 1 bar O2. A total of 78% conversion and >99% selectivity toward indanone can be achieved under optimized conditions. The synergistic effect of Au and Pd and porous carbon support contributed to the high catalytic activity for aerobic benzylic compound oxidation. This work offers a promising application prospect of efficient and recyclable Au-Pd nanocatalysts in functional benzylic ketone production.

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Section: Characterization Of the Catalystmentioning

confidence: 99%

Boosting Solvent-Free Aerobic Oxidation of Benzylic Compounds into Ketones over Au-Pd Nanoparticles Supported by Porous Carbon

Sun,

Peng,

Guo

et al. 2024

Catalysts

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“…At the same time, molecular H 2 is adsorbed on the Pd nanoparticles and is activated and decomposed into H atoms. Then the N-heterocycle is attacked by active H atoms to form a hydrogenated N-heterocycle, thus producing py-THQ [27,28]. The N-heterocycle would be more easily hydrogenated by active H atoms at the Pd-PZs interface.…”

Section: Possible Reaction Pathwaymentioning

confidence: 99%

“…However, because of the high surface energy, small-size metallic nanoparticles are prone to aggregate during the preparation process, resulting in reduced catalytic activity and selectivity [25]. Therefore, a variety of supports, such as TiO 2 , ZnO, SiO 2 , carbon materials with different morphologies, graphitic carbon nitride, and organic polymers, have been applied to stabilize the metal nanoparticles [26][27][28][29][30][31][32]. Among them, as a novel organic-inorganic hybrid materials, polyphosphazenes (PZs) have unique -P=N-structural units with alternating P and N atoms in the backbone and a structural multiplicity of side groups, such as organic, organometallic or inorganic units [33].…”

Section: Introductionmentioning

confidence: 99%

Constructing Polyphosphazene Microsphere-Supported Pd Nanocatalysts for Efficient Hydrogenation of Quinolines under Mild Conditions

Chen,

Xiao,

Yang

et al. 2024

Catalysts

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The efficient hydrogenation of N-heterocycles with H2 under mild conditions remains a significant challenge. In this work, polyphosphazene (PZs) microspheres, novel organic–inorganic hybrid materials possessing unique –P=N– structural units and a diverse range of side groups, were used to serve as support for the design of a stable and efficient Pd nanocatalyst (Pd/PZs). The PZs microspheres were prepared by self-assembly induced by precipitation polymerization, and Pd nanoparticles were grown and loaded on the support by a chemical reduction process. Several characterization techniques, including XRD, FTIR, SEM, TEM, XPS, BET and TGA, were used to study the structural features of the nanocomposites. The results revealed that Pd nanoparticles were uniformly distributed on the PZs microspheres, with primary sizes ranging from 4 to 9 nm based on the abundance of functional P/N/O groups in PZs. Remarkably high catalytic activity and stability were observed for the hydrogenation of quinoline compounds using the Pd/PZs nanocatalyst under mild conditions. Rates of 98.9% quinoline conversion and 98.5% 1,2,3,4-tetrahydroquinoline selectivity could be achieved at a low H2 pressure (1.5 bar) and temperature (40 °C). A possible reaction mechanism for quinoline hydrogenation over Pd/PZs was proposed. This work presents an innovative approach utilizing a Pd-based nanocatalyst for highly efficient multifunctional hydrogenation.

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High-efficient catalytic ozonation for degradation of nitrobenzene in water with Ce-doped LaCoO3 catalyst

Chen,

Yan,

Wang

et al. 2024

J Mater Sci

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Robust Co3O4 nanocatalysts supported on biomass-derived porous N-doped carbon toward low-pressure hydrogenation of furfural

Cited by 5 publications

References 57 publications

Boosting Solvent-Free Aerobic Oxidation of Benzylic Compounds into Ketones over Au-Pd Nanoparticles Supported by Porous Carbon

Boosting Solvent-Free Aerobic Oxidation of Benzylic Compounds into Ketones over Au-Pd Nanoparticles Supported by Porous Carbon

Constructing Polyphosphazene Microsphere-Supported Pd Nanocatalysts for Efficient Hydrogenation of Quinolines under Mild Conditions

High-efficient catalytic ozonation for degradation of nitrobenzene in water with Ce-doped LaCoO3 catalyst

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