Porous Nitrogen‐Doped Carbons as Effective Catalysts for Oxygen Reduction Reaction Synthesized from Cellulose and Polyamide

Xu, Jun; Xia, Chunlin; Li, Ming; Xiao, Rui

doi:10.1002/celc.201901763

Cited by 17 publications

(4 citation statements)

References 50 publications

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“…In addition, the possible chemical structures of the prepared ORR catalysts were detected using Fourier transform infrared (FT-IR) spectroscopy. As shown in Figure c, all the catalysts show that the −OH vibrations, C  N/CC bonds, and C–N/C–C bonds are located at 3450 cm –1 , 1550 cm –1 , and 1110 cm –1 , respectively. , Interestingly, the peak intensities of C–N or CN bonds have been significantly increased after the introduction of ZnCl 2 and NH 4 F, probably due to the double activation effect of ZnCl 2 and NH 4 F, which creates more N, F-doped sites and enhance the graphitization of the catalyst. This result is also consistent with the previous Raman analysis.…”

Section: Resultsmentioning

confidence: 89%

Double-Activator Modulation of Ultrahigh Surface Areas on Doped Carbon Catalysts Boosts the Primary Zn–Air Battery Performance

Qin

et al. 2022

ACS Appl. Energy Mater.

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The exploration of high-performance and low-cost carbon-based catalysts as an excellent substitute for Pt-based catalysts for the oxygen reduction reaction (ORR) is key to solve the commercialization of metal−air batteries. Herein, we report an efficient strategy to design a porous-rich N, F-codoped carbon-based ORR catalyst (A-NFCF-950) by double-activator (ZnCl 2 , NH 4 F) modulation of the specific surface area and pore structure. Among them, ZnCl 2 as a pore modifier can help to produce an ultrahigh specific surface area (up to 2251 m 2 g −1 ) and also facilitate the exposure of more doping active sites. Furthermore, the NH 4 F modifier can be convenient for the charge density regulation of adjoining carbon atoms, which further significantly promotes the graphitization degree and accelerates oxygen dissociation at the catalyst. The electrochemical results indicate that the ORR activity and cycling stability of A-NFCF-950 are comparable to those of the Pt/C catalyst in a 0.1 M KOH electrolyte. In addition, the assembled Zn−air battery using A-NFCF-950 shows a higher power density (220 mW cm −2 ) and a larger capacity energy density (872 Wh kg −1 Zn). This work opens a way to synthesize doped carbon materials with ultrahigh surface areas serving for conventional Pt-based materials toward the ORR in metal−air batteries.

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Section: Resultsmentioning

confidence: 89%

Double-Activator Modulation of Ultrahigh Surface Areas on Doped Carbon Catalysts Boosts the Primary Zn–Air Battery Performance

Qin

et al. 2022

ACS Appl. Energy Mater.

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“…Additionally, the D3 band at ∼1500 cm −1 and the D4 band at ∼1200 cm −1 correspond to the amorphous carbon structure and the carbon defect of polyene, respectively. 46 Generally, the intensity ratio of D1 and G bands (I D1 /I G ) is recognized to evaluate the graphitization degree of carbon materials. 47 The lower I D1 /I G reflects the higher graphitization degree.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The D1 band at ∼1360 cm –1 corresponds to the disordered graphitic structure, and the G band at ∼1595 cm –1 corresponds to graphitic carbon with CC stretching vibrations. Additionally, the D3 band at ∼1500 cm –1 and the D4 band at ∼1200 cm –1 correspond to the amorphous carbon structure and the carbon defect of polyene, respectively . Generally, the intensity ratio of D1 and G bands ( I D1 / I G ) is recognized to evaluate the graphitization degree of carbon materials .…”

Section: Results and Discussionmentioning

confidence: 99%

Synthesis of Hierarchically Porous Carbon with Tailored Porosity and Electrical Conductivity Derived from Hard–Soft Carbon Precursors for Enhanced Capacitive Performance

Xue

Xiao

2021

ACS Sustainable Chem. Eng.

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Porous carbon has been one of the most promising electrode materials for supercapacitors, and the carbon precursor has a significant impact on the properties of final products. Herein, we report an efficient method to prepare hierarchically porous carbon (HPC) using a hard–soft carbon precursor by mixing biomass and pitch, following with carbonization and KOH activation. Combining the advantages of each single precursor, the resultant RH1SP1-HPC presents a high surface area of 2996 m2 g–1 with the fabrication of a 3D interconnected porous structure and good conductivity. Benefiting from these features, RH1SP1-HPC exhibits a superior electrochemical performance compared with the samples derived from a single precursor with a high specific capacitance of 340 F g–1 at 0.5 A g–1 in a two-electrode system and outstanding rate capability of 87.6% capacitance retention at 20 A g–1. The enhanced capacitive performance demonstrates that the hard–soft carbon precursor is desirable to synthesize porous carbons for energy storage.

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“…developed a micro/mesoporous nitrogen‐doped carbon by using cellulose and polyamide as precursors, displaying excellent durability to methanol crossover effect as well as ORR activity close to that of Pt/C (onset potential, 0.986 V vs RHE). [ 119 ] Tang et al. synthesized a hierarchically honeycomb‐like porous carbon tube via pyrolysis of dandelion seed.…”

Section: The Application Of Sustainable Carbon Materials In Catalysismentioning

confidence: 99%

Sustainable Carbon Materials toward Emerging Applications

Lan

Yang

et al. 2021

Small Methods

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It is desirable for a sustainable society that the production and utilization of renewable materials are net‐zero in terms of carbon emissions. Carbon materials with emerging applications in CO2 utilization, renewable energy storage and conversion, and biomedicine have attracted much attention both academically and industrially. However, the preparation process of some new carbon materials suffers from energy consumption and environmental pollution issues. Therefore, the development of low‐cost, scalable, industrially and economically attractive, sustainable carbon material preparation methods are required. In this regard, the use of biomass and its derivatives as a precursor of carbon materials is a major feature of sustainability. Recent advances in the synthetic strategy of sustainable carbon materials and their emerging applications are summarized in this short review. Emphasis is made on the discussion of the original intentions and various sustainable strategies for producing sustainable carbon materials. This review provides basic insights and significant guidelines for the further design of sustainable carbon materials and their emerging applications in catalysis and the biomedical field.

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Porous Nitrogen‐Doped Carbons as Effective Catalysts for Oxygen Reduction Reaction Synthesized from Cellulose and Polyamide

Cited by 17 publications

References 50 publications

Double-Activator Modulation of Ultrahigh Surface Areas on Doped Carbon Catalysts Boosts the Primary Zn–Air Battery Performance

Double-Activator Modulation of Ultrahigh Surface Areas on Doped Carbon Catalysts Boosts the Primary Zn–Air Battery Performance

Synthesis of Hierarchically Porous Carbon with Tailored Porosity and Electrical Conductivity Derived from Hard–Soft Carbon Precursors for Enhanced Capacitive Performance

Sustainable Carbon Materials toward Emerging Applications

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