A spherical multishell hollow carbon-based catalyst with a controllable N-species content for the oxygen reduction reaction in air-breathing cathode microbial fuel cells

Wang, Wenyi; Wang, Xueqin; Wang, Yuanyuan; Jiang, Bolong; Song, Hua

doi:10.1039/d1re00528f

Cited by 6 publications

(11 citation statements)

References 41 publications

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“…There are various strategies to introduce N to carbonbased materials, but most of them required complex, time-consuming process and expensive nitrogen sources. Wang et al [26] prepared N doped SÀ CoÀ Ni/NÀ CÀ T by melamine carbonization. As a cathode catalyst, it has good electrical performance and the high output voltage (0.63 � 0.3 V).…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Multi‐pore Structure Cu, N‐codoped Porous Carbon‐based Catalyst and its Oxygen Reduction Reaction Catalytic Performance for Microbial Fuel Cell

Wang

Jiang

et al. 2022

Electroanalysis

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The development of a non-noble metal cathode ORR catalyst with low cost, high activity and high stability has become an inevitable trend in MFC. The purpose of this study is to develop an efficient and stable Cu, N-codoped porous carbons catalysts with multi-pore structure for MFC. Herein, Cu, N-codoped porous carbons materials (CuÀ NCÀ T) with high N content and multi-pore structure were successfully developed by copyrolysis with MOF-199 and melamine. By contrast, Cudoped porous carbon (CuÀ CÀ T) without melamine was synthesized using MOF-199 as template. The results showed that CuÀ NCÀ T possessed a rough octahedral crystal with a unique multi-mesopore structure with pore centers of 3.4 nm and 11.2 nm, respectively. Owing to high N content, abundantly exposed CuÀ N x active sites and the multi-pore structure, CuÀ NCÀ 800 had a pronounced electrochemical ORR activity in neutral solution (onset potential and limiting current density were 0.161 V and À 6.256 mA • cm À 2 ), which were slightly lower than 20 wt % Pt/C (0.189 V and À 6.479 mA • cm À 2 ). Moreover, the MFC with CuÀ NCÀ 800 showed a power density of 662.8 � 3.6 mW • m À 2 , which was higher than that of CuÀ CÀ 800 (425.7 � 3.9 mW • m À 2 ) and was slightly lower than that 20 wt % Pt/C (815.0 � 6.2 mW • m À 2 ). The output voltage of MFC with CuÀ NCÀ T had no obvious decreasing trend in 30 days, demonstrating that the CuÀ NCÀ T had great stability.

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Section: Introductionmentioning

confidence: 99%

“…Wang et al. [26] prepared N doped S−Co−Ni/N−C−T by melamine carbonization. As a cathode catalyst, it has good electrical performance and the high output voltage (0.63±0.3 V).…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Multi‐pore Structure Cu, N‐codoped Porous Carbon‐based Catalyst and its Oxygen Reduction Reaction Catalytic Performance for Microbial Fuel Cell

Wang

Jiang

et al. 2022

Electroanalysis

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“…Compared to single chain surfactants, these surfactants have higher surface activity, lower Kraft characteristics, stronger emulsifying and interfacial adsorption properties, and have broader application prospects in fields such as tertiary oil recovery, sterilization, and metal corrosion prevention [2][3][4]. This has also led to further research on the influence of surfactant molecules on their performance [5,6].…”

Section: Introductionmentioning

confidence: 99%

Study on the Synthesis, Surface Activity, and Self-Assembly Behavior of Anionic Non-Ionic Gemini Surfactants

Man,

2024

Molecules

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The use of surfactants in oil recovery can effectively improve crude oil recovery rate. Due to the enhanced salt and temperature resistance of surfactant molecules by non-ionic chain segments, anionic groups have good emulsifying stability. Currently, there are many studies on anionic non-ionic surfactants for oil recovery in China, but there is relatively little systematic research on introducing EOs into hydrophobic alkyl chains, especially on their self-assembly behavior. This article proposes a simple and effective synthesis method, using 3-aminopropane sulfonic acid, fatty alcohol polyoxyethylene ether, and epichlorohydrin as raw materials, to insert EO into hydrophobic alkyl chains and synthesize a series of new anionic non-ionic Gemini surfactants (CnEO-5, n = 8, 12, 16). The surface activity, thermodynamic properties, and self-assembly behavior of these surfactants were systematically studied through surface tension, conductivity, steady-state fluorescence probes, transmission electron microscopy, and molecular dynamics simulations. The surface tension test results show that CnEO-5 has high surface activity and is higher than traditional single chain surfactants and structurally similar anionic non-ionic Gemini surfactants. Additionally, thermodynamic parameters (e.g., ΔG°mic ΔH°mic ΔS°mic et al. indicate that CnEO-5 molecules are exothermic and spontaneous during the micellization process. DLS, p-values, and TEM results indicate that anionic non-ionic Gemini surfactants with shorter hydrophobic chains (such as C8EO-5) tend to form larger vesicles in aqueous solutions, which are formed in a tail to tail and staggered manner; Negative non-ionic Gemini surfactants with longer hydrophobic chains (such as C12EO-5, C16EO-5) tend to form small micelles. The test results indicate that CnEO-5 anionic non-ionic Gemini surfactants have certain application prospects in improving crude oil recovery.

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“…Therefore, it is necessary to increase the quantity of catalytic centers M–N x to targetedly boost the electrocatalytic ability. Co-pyrolysis of the precursor of M–N–C with nitrogenous organic compounds (urea and melamine) or introducing nitrogenous compounds by constructing special morphology can effectively increase the amount of active center sites, in which constructing special morphology can not only increase the M–N x active site but also significantly optimize the pore structure and ameliorate the dispersion of catalytic site distribution to reduce the resistance between catalyst substrates and improve the electron transfer efficiency of catalysts.…”

Section: Introductionmentioning

confidence: 99%

“…Although the M–N–C catalysts show considerable potential in the effective improvement of the catalytic performance with cost reduction, their long-term operation stability has not been effectively improved . Abundant studies have shown that the alloyed catalysts composed of multimetal and M 1 /M 2 –N–C catalysts can obtain satisfactory ORR catalytic performance accompanied by outstanding long-term stability. This may be owing to the synergistic action of multiple metals, which increases the charge imbalance on the carbon surface and improves the conductivity of catalyst materials.…”

Section: Introductionmentioning

confidence: 99%

Engineering Hollow Core–Shell N–C@Co/N–C Catalysts with Bits of Ni Doping Used as Efficient Electrocatalysts in Microbial Fuel Cells

Wang

et al. 2022

ACS Appl. Mater. Interfaces

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The sluggish and inefficient oxygen reduction reaction (ORR) of cathode catalysts in microbial fuel cells is widely accepted as the key restriction in implementing their large-scale actual production application. Recently, modification of nitrogen-doping carbon materials with some transition metal species (M–N–C) is expected to be reserve force to substitute commercial noble metal catalysts. However, long-term stability is always unable to solve effectively. We report a simple synthetic approach of metal–organic framework-derived hollow core–shell Co–nitrogen codoping-modified porous carbon catalysts (N–C@Co/N–C–n%Ni), which is introduced by bits of Ni substance, via the template method and vacuum-assisted impregnation method that exhibit similar catalytic activity to commercial Pt/C catalysts. The hollow core–shell H–N–C@Co/N–C–3%Ni catalyst shows excellent ORR performance and stability, which is 96.31% of the initial current after 125 h continuous reaction, and has been capable of yielding a maximum power density of 1.17 ± 0.01 W·m–2 with 2% decrease in 45 days for long-term continuous operation.

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A spherical multishell hollow carbon-based catalyst with a controllable N-species content for the oxygen reduction reaction in air-breathing cathode microbial fuel cells

Abstract: Spherical micro- and mesoporous carbon-based catalysts are often surprisingly effective at oxygen reduction reaction (ORR). Herein, a self-templated strategy was proposed to fabricate a spherical MOF (S-Terephthalic acid-MOF, S-Co-Ni-PTA-MOF) via...

Cited by 6 publications

References 41 publications

Fabrication of Multi‐pore Structure Cu, N‐codoped Porous Carbon‐based Catalyst and its Oxygen Reduction Reaction Catalytic Performance for Microbial Fuel Cell

Fabrication of Multi‐pore Structure Cu, N‐codoped Porous Carbon‐based Catalyst and its Oxygen Reduction Reaction Catalytic Performance for Microbial Fuel Cell

Study on the Synthesis, Surface Activity, and Self-Assembly Behavior of Anionic Non-Ionic Gemini Surfactants

Engineering Hollow Core–Shell N–C@Co/N–C Catalysts with Bits of Ni Doping Used as Efficient Electrocatalysts in Microbial Fuel Cells

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