Metal‐Free Catalytic Reduction of 4‐Nitrophenol by MOFs‐Derived N‐Doped Carbon

Wang, Zhenhua; Chen, Qianwang

doi:10.1002/slct.201702721

Cited by 32 publications

(10 citation statements)

References 38 publications

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“…[19] In Freire's study, the N-containing groups were pyridinic > pyrrolic > N-quaternary (N-graphitic) � N-oxide, and the S-containing groups were mainly thiophene-like (thiophenic aromatic CÀ SÀ C structure). Although the exact nature of the active sites in such systems was not clearly identified, some works have demonstrated the importance of pyridinic [39] and graphitic [14] N-groups in N-CNT, and thiophenic or sulfoxide groups in S-CNT. [15] Additionally, the presence of hydrophilic groups on CNT surface can improve their dispersion in water, which is important for this catalytic reaction.…”

Section: Materials Characterizationmentioning

confidence: 99%

Multifunctional Catalytic Properties of Pd/CNT Catalysts for 4‐Nitrophenol Reduction

et al. 2022

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Carbon nanotubes are arousing real interest in catalysis, either as catalyst support or as catalyst itself. In this work, the influence of CNT doping (O, N, S) on the catalytic performance of CNT and Pd/CNT catalysts have been investigated in the reduction of 4-nitrophenol both under H 2 or using NaBH 4 as a hydride source. The morphology, composition, particle size and crystallinity of the materials were investigated by various techniques including HRTEM, STEM, XPS, Raman spectroscopy and XRD. Among the CNT carbocatalysts, only N-CNT is active for 4-nitrophenol reduction at room temperature, and only in the presence of NaBH 4 . As far as supported Pd catalysts are concerned, the nature of the support influences the Pd nanoparticle location (confinement), the Pd nanoparticles/Pd single atoms ratio and the extent of H-spillover, three catalyst features that directly affect the catalytic activity. The best combination of Pd nanoparticles/Pd single atoms ratio, H-spillover and confinement for 4-nitrophenol reduction using NaBH 4 , is found in Pd/O-CNT catalysts, while for reactions performed under H 2 , Pd/N-CNT presents the best combination.

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Section: Materials Characterizationmentioning

confidence: 99%

Multifunctional Catalytic Properties of Pd/CNT Catalysts for 4‐Nitrophenol Reduction

et al. 2022

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“…10,11 The MOF-derived nanoparticles by calcination still have a porous structure and exhibit high electrical conductivity with excellent electron transport behavior due to the doping of nitrogen atoms, which could promote electrocatalysis. 12 Oxygen reduction reaction (ORR) indicated that better catalytic performance could be achieved by MOF derivatives than by precious metal Pt/C catalysts. 13 Besides, the metal ions and organic ligands in MOFs are linked by coordination bonds and these relatively weak chemical bonds may break under proper conditions.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Catalytic Performance of a Membrane Microreactor by Immobilizing ZIF-8-Derived Nano-Ag via Ion Exchange

Chen

Fan

Qiu

et al. 2020

Ind. Eng. Chem. Res.

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A catalytic membrane microreactor (CMMR) was fabricated by immobilizing ZIF-8-derived nano-Ag in membrane pores via ion exchange. ZIF-8 was first in situ assembled in polyethersulfone (PES) membrane pores with polydopamine modification. The Zn–N bond disappeared and Ag–N bond appeared after ion exchange by a AgNO3 solution. Besides, the X-ray diffraction (XRD) characteristic peaks of ZIF-8 transformed into those of the Ag–MI coordination compounds. The Ag–N bond disappeared and the characteristic peaks of Ag appeared after reduction by a NaBH4 solution. It could be observed by transmission electron microscopy (TEM) that the size of nano-Ag was 4.55 ± 1.67 nm, which was one-fifth of that without ZIF-8 as a precursor. The inductively coupled plasma emission spectroscopy (ICP-OES) test revealed that the loading capacity of nano-Ag in PES membrane pores was 31.33%. The degradation of p-nitrophenol (p-NP) was applied to test the catalytic performance of the CMMR, and the apparent reaction rate constant could be increased by 2 orders of magnitude.

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“…The observed rate constant and activity factor values are better than those of the reported nonmetallic catalysts. 29,37…”

Section: Resultsmentioning

confidence: 99%

Porous Organic Polymer-Derived Carbon Composite as a Bimodal Catalyst for Oxygen Evolution Reaction and Nitrophenol Reduction

2018

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Ethylene diamine-based porous organic polymer (EPOP) was synthesized, carbonized at different temperatures, and characterized. The successful formation of the triazine polymer was confirmed by Fourier-transform infrared spectroscopy, 13 C, and 15 N cross-polarization magic angle spinning solid-state NMR. The two-dimensional layered architecture and graphitic nature of the samples resembled that of nitrogen-doped amorphous carbon, as confirmed by Raman, powder X-ray diffraction, and transmission electron microscopy measurements. The catalytic activity of these materials toward nitrophenol reduction and electrocatalytic activity toward oxygen evolution reaction (OER) were systematically evaluated in detail. Electrocatalytic activity toward oxygen evolution reaction was systematically evaluated by chronoamperometry and linear sweep voltammetry. Results clearly demonstrate that all of these catalysts exhibit good OER activity and excellent stability. Among all catalysts, EPOP-700 showed better OER activity, as reflected by its onset potential and current density, comparable with that of the metal-based OER catalysts and better than that of metal-free catalysts. Further, their catalytic activity toward the reduction of 4-nitrophenol to 4-aminophenol was tested with NaBH 4 ; although all of these catalysts showed good catalytic activity; EPOP-800 displayed better catalytic activity.

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Metal‐Free Catalytic Reduction of 4‐Nitrophenol by MOFs‐Derived N‐Doped Carbon

Cited by 32 publications

References 38 publications

Multifunctional Catalytic Properties of Pd/CNT Catalysts for 4‐Nitrophenol Reduction

Multifunctional Catalytic Properties of Pd/CNT Catalysts for 4‐Nitrophenol Reduction

Enhanced Catalytic Performance of a Membrane Microreactor by Immobilizing ZIF-8-Derived Nano-Ag via Ion Exchange

Porous Organic Polymer-Derived Carbon Composite as a Bimodal Catalyst for Oxygen Evolution Reaction and Nitrophenol Reduction

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