N-doped carbon nanocages with high catalytic activity and durability for oxygen reduction

Wang, Xiao Xia; Zou, Biao; Du, Xin; Wang, Jiannong

doi:10.1039/c5ta02009c

Cited by 27 publications

(12 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is probably because during the process of high-temperature pyrolysis, decomposition of NH 4 Cl produces NH 3 gas, which disperses into the glucose-derived porous carbon matrix to react with oxygen functionalities. 32 Thus, nitrogen was doped into glucose-derived porous carbon, resulting in formation of Fe/C–N hybrids. Similar strategies with NH 4 Cl as N doping sources have also been reported in previous works for the preparation of N-doped carbon materials.…”

Section: Resultsmentioning

confidence: 99%

“…Similar strategies with NH 4 Cl as N doping sources have also been reported in previous works for the preparation of N-doped carbon materials. 32,33 The O 1s XPS spectrum of Fe/N–C-2 could be fitted into three peaks at binding energies of 530.3, 532.1, and 533.5 eV (Figure S4a, Supporting Information), which are assigned to Fe–O in Fe 3 O 4 , 34 C=O, and C–O, 35 respectively. The C 1s spectrum of Fe/N–C-2 is fitted into four peaks at binding energies of 284.6, 285.1, 286.1, and 289.1 eV (Figure S4b, Supporting Information), corresponding to C=C, C=N, C–O and C–N, and O–C=O bond, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The result indicates successful N doping by using NH 4 Cl as the nitrogen source. This is probably because during the process of high-temperature pyrolysis, decomposition of NH 4 Cl produces NH 3 gas, which disperses into the glucose-derived porous carbon matrix to react with oxygen functionalities . Thus, nitrogen was doped into glucose-derived porous carbon, resulting in formation of Fe/C–N hybrids.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Ultrasound-Assisted Removal of Tetracycline by a Fe/N–C Hybrids/H₂O₂ Fenton-like System

Zhang

Chen

et al. 2018

ACS Omega

View full text Add to dashboard Cite

In this work, the degradation of tetracycline (TC) in water by the integrated ultrasound (US)-Fenton process was investigated. For this, a new composite Fe/N–C- x ( x is the molar ratio of iron salt Fe(NO 3 ) 3 ·9H 2 O) catalyst was synthesized through simple carbonization of the mixture of glucose and iron salt Fe(NO 3 ) 3 ·9H 2 O in the presence of ammonium chloride as the nitrogen source. The resultant catalysts were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, vibrating sample magnetometer, and N 2 adsorption–desorption, showing a typical graphite porous structure and good magnetic properties. The results indicated that the optimized Fe/N–C-2 catalyst prepared with a mole ratio of glucose/Fe(NO 3 ) 3 ·9H 2 O/NH 4 Cl of 5:2:16.8 exhibited the highest TC removal in the Fe/N–C-2/H 2 O 2 /US system at a wide pH range from 3.0 to 11.0. At an initial pH of 7.0, TC removal in the Fe/N–C-2/H 2 O 2 /TC/US system was 1.83, 18.69, and 28.75 times of that in Fe/N–C-2/TC/H 2 O 2 , H 2 O 2 /TC/US, and TC/H 2 O 2 systems, showing a positive synergistic action between US and Fe/N–C-2. The effects of catalyst dosage, H 2 O 2 concentration, ultrasonic power, humic acid, and coexisting anions on TC removal were investigated. The preliminary analysis suggested that the Fe–N species and the graphite N dispersed in the carbon matrix are responsible for the efficient catalytic activity. By a simple magnetic separation, the Fe/N–C-2 catalyst was easily recovered and used for the next degradation experiment. Above 88% catalytic ability of Fe/N–C-2 was retained even after six successive runs, suggesting its good reusability. The simple preparation strategy, good magnetic property, and good catalytic ability of the Fe/N–C-2 materials make them promising alternative Fenton-like catalysts for the antibiotics abatement in water.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Ultrasound-Assisted Removal of Tetracycline by a Fe/N–C Hybrids/H₂O₂ Fenton-like System

Zhang

Chen

et al. 2018

ACS Omega

View full text Add to dashboard Cite

show abstract

“…As shown in Figure S1A (Supporting Information), the blue mixture was transformed into foam‐like carbon composite after heating treatment and scalable production of CoO@Co/N‐C up to 10 gram can be achieved at one time (Figure S1B, Supporting Information). There are some previously reports on the synthesis of porous nanostructures based on NH 4 Cl‐induced gas template, such as 3D porous graphene, carbon nanocages, and graphite carbon nitride . It is worth noting that the introduction of NH 4 Cl not only served as gas templates, but also afforded nitrogen doping simultaneously.…”

Section: Resultsmentioning

confidence: 99%

Sugar Blowing‐Induced Porous Cobalt Phosphide/Nitrogen‐Doped Carbon Nanostructures with Enhanced Electrochemical Oxidation Performance toward Water and Other Small Molecules

Zhu

et al. 2017

Small

View full text Add to dashboard Cite

Rational design of high active and robust nonprecious metal catalysts with excellent catalytic efficiency in oxygen evolution reaction (OER) is extremely vital for making the water splitting process more energy efficient and economical. Among these noble metal-free catalysts, transition-metal-based nanomaterials are considered as one of the most promising OER catalysts due to their relatively low-cost intrinsic activities, high abundance, and diversity in terms of structure and morphology. Herein, a facile sugar-blowing technique and low-temperature phosphorization are reported to generate 3D self-supported metal involved carbon nanostructures, which are termed as Co P@Co/nitrogen-doped carbon (Co P@Co/N-C). By capitalizing on the 3D porous nanostructures with high surface area, homogeneously dispersed active sites, the intimate interaction between active sites, and 3D N-doped carbon, the resultant Co P@Co/N-C exhibits satisfying OER performance superior to CoO@Co/N-C, delivering 10 mA cm at overpotential of 0.32 V. It is worth noting that in contrast to the substantial current density loss of RuO , Co P@Co/N-C shows much enhanced catalytic activity during the stability test and a 1.8-fold increase in current density is observed after stability test. Furthermore, the obtained Co P@Co/N-C can also be served as an excellent nonprecious metal catalyst for methanol and glucose electrooxidation in alkaline media, further extending their potential applications.

show abstract

“…Another group investigated the influence of different N sources on the types of N species formed in the catalyst and showed that N incorporation from glycine contributed to higher catalyst activity while NH 3 treatment etched the catalyst surface, giving higher surface area and improved access of O 2 to protected active sites. , The importance of pore accessibility within the surface of the catalyst was suggested by researchers using a composite of N-doped graphene and CNTs . Other recent papers also report the synthesis of other metal-free catalysts for the ORR. − …”

Section: Pyrolyzed Nonprecious Metal Catalystsmentioning

confidence: 99%

Nonprecious Metal Catalysts for Oxygen Reduction in Heterogeneous Aqueous Systems

2018

View full text Add to dashboard Cite

A comprehensive review of recent advances in the field of oxygen reduction electrocatalysis utilizing nonprecious metal (NPM) catalysts is presented. Progress in the synthesis and characterization of pyrolyzed catalysts, based primarily on the transition metals Fe and Co with sources of N and C, is summarized. Several synthetic strategies to improve the catalytic activity for the oxygen reduction reaction (ORR) are highlighted. Recent work to explain the active-site structures and the ORR mechanism on pyrolyzed NPM catalysts is discussed. Additionally, the recent application of Cu-based catalysts for the ORR is reviewed. Suggestions and direction for future research to develop and understand NPM catalysts with enhanced ORR activity are provided.

show abstract

N-doped carbon nanocages with high catalytic activity and durability for oxygen reduction

Abstract: N-doped carbon nanocages with high specific surface areas exhibited excellent activity and durability for oxygen reduction reaction in acidic electrolytes.

Cited by 27 publications

References 39 publications

Ultrasound-Assisted Removal of Tetracycline by a Fe/N–C Hybrids/H₂O₂ Fenton-like System

Ultrasound-Assisted Removal of Tetracycline by a Fe/N–C Hybrids/H₂O₂ Fenton-like System

Sugar Blowing‐Induced Porous Cobalt Phosphide/Nitrogen‐Doped Carbon Nanostructures with Enhanced Electrochemical Oxidation Performance toward Water and Other Small Molecules

Nonprecious Metal Catalysts for Oxygen Reduction in Heterogeneous Aqueous Systems

Contact Info

Product

Resources

About

N-doped carbon nanocages with high catalytic activity and durability for oxygen reduction

Abstract: N-doped carbon nanocages with high specific surface areas exhibited excellent activity and durability for oxygen reduction reaction in acidic electrolytes.

Cited by 27 publications

References 39 publications

Ultrasound-Assisted Removal of Tetracycline by a Fe/N–C Hybrids/H2O2 Fenton-like System

Ultrasound-Assisted Removal of Tetracycline by a Fe/N–C Hybrids/H2O2 Fenton-like System

Sugar Blowing‐Induced Porous Cobalt Phosphide/Nitrogen‐Doped Carbon Nanostructures with Enhanced Electrochemical Oxidation Performance toward Water and Other Small Molecules

Nonprecious Metal Catalysts for Oxygen Reduction in Heterogeneous Aqueous Systems

Contact Info

Product

Resources

About

Ultrasound-Assisted Removal of Tetracycline by a Fe/N–C Hybrids/H₂O₂ Fenton-like System

Ultrasound-Assisted Removal of Tetracycline by a Fe/N–C Hybrids/H₂O₂ Fenton-like System