Nitrogen-doped activated carbon with micrometer-scale channels derived from luffa sponge fibers as electrocatalysts for oxygen reduction reaction with high stability in acidic media

Li, Jianpeng; Wang, Shuguang; Ren, Yaqi; Ren, Zhonghua; Qiu, Yejun; Yu, Jie

doi:10.1016/j.electacta.2014.10.089

Cited by 62 publications

(34 citation statements)

References 44 publications

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“…This may be ascribed to large specific surface area, 3D interconnected hierarchical porous structure and nitrogen‐containing functional groups in the material with x =1. The interconnected hierarchical porous structure can shorten ion transport path, while nitrogen doping can increase the electric conductivity of carbon materials . Figure d compares the specific capacitances (F g −1 ) of the NHPC‐ x at different current densities (A g −1 ).…”

Section: Resultsmentioning

confidence: 99%

Nitrogen‐Doped Hierarchical Porous Carbon Framework Derived from Waste Pig Nails for High‐Performance Supercapacitors

Zhou

Ren

et al. 2017

ChemElectroChem

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In situ nitrogen‐doped hierarchical porous carbon was synthesized by using waste protein‐rich pig nails as precursors in a facile KOH activation method. The microstructure and electrochemical characteristics of the materials were investigated by tuning the amount of KOH. When the weight ratio of KOH to pig nails is 1 : 1, the obtained nitrogen‐doped hierarchical porous carbon (NHPC‐1) exhibits the largest specific surface area (2569 m2 g−1) with interconnected porous network structure, which are beneficial to ion/electron storage and transfer. In addition, abundant nitrogen of 2.8 at % in the NHPC‐1 also contributes to the high electrochemical activity of the supercapacitor during the charging/discharging process. As a result, the NHPC‐1 electrode in the supercapacitor exhibits a high specific capacitance of 231 F g−1 at 1 A g−1 and superior retention of 98 % after 5000 cycles at 1 A g−1 in 6 M KOH electrolyte. Additionally, the assembled symmetric device based on NHPC‐1 exhibits a high energy density of 7 Wh kg−1 at a power density of 500 W kg−1. Our study suggests that waste pig nails can act as low‐cost and renewable carbon precursors for high performance supercapacitor.

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Section: Resultsmentioning

confidence: 99%

Nitrogen‐Doped Hierarchical Porous Carbon Framework Derived from Waste Pig Nails for High‐Performance Supercapacitors

Zhou

Ren

et al. 2017

ChemElectroChem

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“…[30][31][32][33][34][35] Moreover, these products aer the simple pyrolysis really possess considerable electro-catalytic activities for the ORR. The conversion of biomass into nanocarbon is crucial because it allows ne tuning of the chemical structure and morphology of carbon to meet the desired applications.…”

Section: Introductionmentioning

confidence: 99%

Iron and nitrogen co-doped carbon nanotube@hollow carbon fibers derived from plant biomass as efficient catalysts for the oxygen reduction reaction

et al. 2015

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The present paper reports on the preparation of novel iron and nitrogen co-doped carbon nanotube@hollow carbon fibers (denoted as Fe/N/CNT@PCFs) by pyrolysis of the natural product catkin, FeCl 3 and melamine. The experimental results show that: (1) melamine and FeCl 3 doped into precursors have hugely enhanced the content of doped nitrogen in Fe/N/CNT@PCFs; (2) Fe elements have catalyzed the growth of abundant CNTs along both the inner and outer walls of Fe/N/CNT@PCFs affording abundant porous structures and a larger BET specific surface area; (3) Fe elements have also facilitated the transformation of inactive oxidized N species to the highly active pyridinic-N, pyrrolic-N, and Fe-N clusters for Fe/N/CNT@PCFs, thereby improving the ORR electro-catalytic activity of the asprepared Fe/N/CNT@PCF catalyst. On the other hand, the typical RDE and RRDE detection results haveproved that the ORR catalyzed by the as-prepared Fe/N/CNT@PCF catalyst is mainly by 4e À reduction accompanying higher durability of the ORR electro-catalytic activity and more excellent methanol tolerance compared with the commercial Pt/C catalyst. The relatively simple synthesis approach, the cheap precursor materials, and excellent ORR catalytic efficiency of the Fe/N/CNT@PCF catalyst make it promising for low-temperature fuel cells.

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“…In previous years, vegetal and animal origin biomasses such as moss [9], lotus stem [10], oil seed [11], luffa sponge fibers [12], amaranthus [13], pomelo peel [14], brewer's yeast [15], okara [16], fish [17], chicken feather [18], porcine blood [19,20], olive oil [21] and waste leather scraps [22,23] have been reported as carbon and heteroatom precursors for the synthesis of electrocatalysts, as they have been found to enhance ORR performance. Additionally, through chemical treatments, such as activation and doping, physicochemical and electrochemical properties can be tuned.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, through chemical treatments, such as activation and doping, physicochemical and electrochemical properties can be tuned. Specifically, KOH activation agents that promote microporosity [24] have been used to synthesize electrocatalysts towards ORR [12,22,23]. On the other hand, doping with heteroatoms is one of the most effective methods to tailor the electronic properties of carbon nanomaterials [25], when doping the carbonaceous framework with heteroatoms, electronegativities and atom sizes could lead to alteration of the electron densities, resulting in the formation of active centers for ORR and contributing to an improvement in the electrochemical stability [26].…”

Section: Introductionmentioning

confidence: 99%

N-Doped Porous Carbon from Sargassum spp. as Efficient Metal-Free Electrocatalysts for O2 Reduction in Alkaline Fuel Cells

et al. 2019

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This work reports the synthesis of N-doped porous carbon (NPC) with a high surface area from Sargassum spp. as a low-cost alternative for electrocatalyst production for the oxygen reduction reaction (ORR). Sargassum spp. was activated with potassium hydroxide at different temperatures (700, 750, and 800 °C) and then doped with pyridine (N700, N750, and N800). As a result of the activation process, the 800 °C sample showed a high surface area (2765 m2 g−1) and good onset potential (0.870 V) and current density (4.87 mA cm−2). The ORR performance of the electrocatalysts in terms of their current density was N800 > N750 > N700 > 750 > 800 > 700, while the onset potential decreased in the following order: N800 > 800 > 750 > 700 > N700 > N750. The fuel cell performance of the membrane electrode assembly (MEA) prepared with electrocatalyst synthesized at 750 °C and doped with pyridine was 12.72 mW cm−2, which was close to that from Pt/C MEA on both the anode and cathode (14.42 mW cm−2). These results indicate that NPCs are an alternative to the problem of Sargassum spp. accumulation in the Caribbean due to their high efficiency as electrocatalysts for ORR.

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Nitrogen-doped activated carbon with micrometer-scale channels derived from luffa sponge fibers as electrocatalysts for oxygen reduction reaction with high stability in acidic media

Cited by 62 publications

References 44 publications

Nitrogen‐Doped Hierarchical Porous Carbon Framework Derived from Waste Pig Nails for High‐Performance Supercapacitors

Nitrogen‐Doped Hierarchical Porous Carbon Framework Derived from Waste Pig Nails for High‐Performance Supercapacitors

Iron and nitrogen co-doped carbon nanotube@hollow carbon fibers derived from plant biomass as efficient catalysts for the oxygen reduction reaction

N-Doped Porous Carbon from Sargassum spp. as Efficient Metal-Free Electrocatalysts for O2 Reduction in Alkaline Fuel Cells

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