Catalytic performance of CH4–CO2 reforming over metal free nitrogen-doped biomass carbon catalysts: Effect of different preparation methods

Zhang, Xiaodi; Qin, Xiaowei; Li, Jun; Li, Guoqiang; Xu, Ying; Lv, Yongkang

doi:10.1016/j.ijhydene.2021.07.043

Cited by 18 publications

(3 citation statements)

References 47 publications

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“…Figure 4 shows N1s spectrum which can be deconvoluted into three different peaks. There are three types of N species in NSG@GF [ 30 , 31 ], which are pyridinic-N (N-6) [ 32 ], pyrrolic-N (N-5) [ 33 ], and quaternary N (N-Q) [ 34 ] locating at 398.4 eV, 399.4 eV, and 401.1 eV, respectively. Different nitrogen doping configurations have different effects.…”

Section: Resultsmentioning

confidence: 99%

Nitrogen-Doped Porous Core-Sheath Graphene Fiber-Shaped Supercapacitors

Liu

Xiang

et al. 2022

Polymers

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In this study, a strategy to fabricate nitrogen-doped porous core-sheath graphene fibers with the incorporation of polypyrrole-induced nitrogen doping and graphene oxide for porous architecture in sheath is reported. Polypyrrole/graphene oxide were introduced onto wet-spun graphene oxide fibers by dip-coating. Nitrogen-doped core-sheath graphene-based fibers (NSG@GFs) were obtained with subsequently thermally carbonized polypyrrole/small-sized graphene oxide and graphene oxide fiber slurry (PPY/SGO@GOF). Both nitrogen doping and small-sized graphene sheets can improve the utilization of graphene layers in graphene-based fiber electrode by preventing stacking of the graphene sheets. Enhanced electrochemical performance is achieved due to the introduced pseudo-capacitance and enhanced electrical double-layered capacitance. The specific capacitance (38.3 mF cm−2) of NSG@GF is 2.6 times of that of pure graphene fiber. The energy density of NSG@GF reaches 3.40 μWh cm−2 after nitrogen doping, which is 2.59 times of that of as-prepared one. Moreover, Nitrogen-doped graphene fiber-based supercapacitor (NSG@GF FSSC) exhibits good conductivity (155 S cm−1) and cycle stability (98.2% capacitance retention after 5000 cycles at 0.1 mA cm−2).

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Section: Resultsmentioning

confidence: 99%

Nitrogen-Doped Porous Core-Sheath Graphene Fiber-Shaped Supercapacitors

Liu

Xiang

et al. 2022

Polymers

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“…The BC has a high BET surface area of 1050 m 2 g −1 and a specific capacitance of about 176 F g −1 [24] . CO 2 etching method has the advantage of environmental protection, but the porosity and specific surface area obtained are small [25] . Wang et al.…”

Section: Introductionmentioning

confidence: 99%

“…[24] CO 2 etching method has the advantage of environmental protection, but the porosity and specific surface area obtained are small. [25] Wang et al published a porous carbon with an extremely high specific surface area of 3404 m 2 g À 1 and a large pore volume of 1.88 cm 3 g À 1 . The porous carbon electrode is used as an ultracapacitor with a specific capacitance of 421 F g À 1 and 273 F g À 1 in the three-electrode and twoelectrode systems, respectively.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen‐rich Graphite Flake from Hemp as Anode Material for High Performance Lithium‐ion Batteries

Wang

Sui

Sha

et al. 2023

Chemistry An Asian Journal

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Biomass-derived carbon (BC) has attracted extensive attention as anode material for lithium ion batteries (LiBs) due to its natural hierarchical porous structure and rich heteroatoms that can adsorb Li + . However, the specific surface area of pure biomass carbon is generally small, so we can help NH 3 and inorganic acid produced by urea decomposition to strip biomass, improve its specific surface area and enrich nitrogen elements. The nitrogen-rich graphite flake obtained by the above treatment of hemp is named NGF. The product that has a high nitrogen content of 10.12% has a high specific surface area of 1151.1 m 2 g À 1 . In the lithium ion battery test, the capacity of NGF is 806.6 mAh g À 1 at 30 mA g À 1 , which is twice than that of BC. NGF also showed excellent performance that is 429.2 mAh g À 1 under high current testing at 2000 mA g À 1 . The reaction process kinetics is analyzed and we found that the outstanding rate performance is attributed to the large-scale capacitance control. In addition, the results of the constant current intermittent titration test indicate that the diffusion coefficient of NGF is greater than that of BC. This work proposes a simple method of nitrogen-rich activated carbon, which has a significantly commercial prospect.

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g‐C₃N₄ Coating Enhanced Cu@AC for Catalytic Wet Air Oxidation of Phenol under Mild Conditions

Wei,

Cui,

Zhao

et al. 2024

ChemistrySelect

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A Cu‐based supported catalyst with g‐C3N4 coating (Cu/g‐C3N4@AC) was prepared by facile in‐situ growth over activated carbon surface with urea and Cu(NO3)2, and the catalytic performance for wet air oxidation of phenolic wastewater was investigated. The effects of different reaction conditions (catalyst, temperature, pressure and pH) were examined. The results show that under the catalysis of Cu/g‐C3N4@AC phenol could be completely oxidized at 120 °C and 0.5 MPa O2 with COD removal of 92.6 % (from 4883 mg/L to 361 mg/L). TEM, BET, XRD, FTIR and XPS characterizations showed that g‐C3N4 coating could strengthen the metal surface interaction via the Cu−N−C bonds formation, thus suppressing the aggregation of the active components on the surface and mitigating the catalyst deactivation. Moreover, the interaction between the Cu species and the g‐C3N4 structure facilitates the electron transfer and thus significantly boost up the catalytic activity. These findings help explore efficient catalysts for the wastewater treatment via wet air oxidation under mild conditions.

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Catalytic performance of CH4–CO2 reforming over metal free nitrogen-doped biomass carbon catalysts: Effect of different preparation methods

Cited by 18 publications

References 47 publications

Nitrogen-Doped Porous Core-Sheath Graphene Fiber-Shaped Supercapacitors

Nitrogen-Doped Porous Core-Sheath Graphene Fiber-Shaped Supercapacitors

Nitrogen‐rich Graphite Flake from Hemp as Anode Material for High Performance Lithium‐ion Batteries

g‐C₃N₄ Coating Enhanced Cu@AC for Catalytic Wet Air Oxidation of Phenol under Mild Conditions

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Catalytic performance of CH4–CO2 reforming over metal free nitrogen-doped biomass carbon catalysts: Effect of different preparation methods

Cited by 18 publications

References 47 publications

Nitrogen-Doped Porous Core-Sheath Graphene Fiber-Shaped Supercapacitors

Nitrogen-Doped Porous Core-Sheath Graphene Fiber-Shaped Supercapacitors

Nitrogen‐rich Graphite Flake from Hemp as Anode Material for High Performance Lithium‐ion Batteries

g‐C3N4 Coating Enhanced Cu@AC for Catalytic Wet Air Oxidation of Phenol under Mild Conditions

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Product

Resources

About

g‐C₃N₄ Coating Enhanced Cu@AC for Catalytic Wet Air Oxidation of Phenol under Mild Conditions