Naturally derived carbon nanofibers as sustainable electrocatalysts for microbial energy harvesting: A new application of spider silk

Zhou, Lihua; Fu, Peng; Cai, Xiaoyan; Zhou, Shungui; Yuan, Yong

doi:10.1016/j.apcatb.2016.01.063

Cited by 80 publications

(42 citation statements)

References 49 publications

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“…The authors applied similar procedure on spider silk (SS) and obtained N,S‐doped carbon with a high activity toward the ORR at alkaline (KOH) and neutral pH (BP). In addition, the SS‐derived catalyst at the cathode of a microbial fuel cell produced a high power density (1800 mW m −2 ), 1.6 times higher than that of Pt/C . N,S‐codoped micro‐mesoporous carbon was also synthesized from the silk cocoon via simultaneous heat treatment with thiourea and KOH agents …”

Section: Electrocatalysts From Zoomassmentioning

confidence: 99%

Advanced Biomass‐Derived Electrocatalysts for the Oxygen Reduction Reaction

et al. 2017

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Recent progress in advanced nanostructures synthesized from biomass resources for the oxygen reduction reaction (ORR) is reviewed. The ORR plays a significant role in the performance of numerous energy-conversion devices, including low-temperature hydrogen and alcohol fuel cells, microbial fuel cells, as well as metal-air batteries. The viability of such fuel cells is strongly related to the cost of the electrodes, especially the cathodic ORR electrocatalyst. Hence, inexpensive and abundant plant and animal biomass have become attractive options to obtain electrocatalysts upon conversion into active carbon. Bioresource selection and processing criteria are discussed in light of their influence on the physicochemical properties of the ORR nanostructures. The resulting electrocatalytic activity and durability are introduced and compared to those from conventional Pt/C-based electrocatalysts. These ORR catalysts are also active for oxygen or hydrogen evolution reactions.

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Section: Electrocatalysts From Zoomassmentioning

confidence: 99%

Advanced Biomass‐Derived Electrocatalysts for the Oxygen Reduction Reaction

et al. 2017

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“…[3] Most of these materials are obtained by heat treatment of different carbon precursors and their subsequent chemical and/ or physical activation. [4] However,the template-supported polymer precursors currentlyu sed to achieve hierarchical porous structurea re complicated and expensive. Generally,o rganic carbon precursors are prone to collapse and aggregation during high-temperature heat treatment, resulting in dense internal structures,w hich leads to poor accessibility of electrolyte ions, low electrical conductivity,a nd low efficiency.…”

Section: Introductionmentioning

confidence: 99%

Polyhydroxyalkanoate‐Modified Bacterium Regulates Biomass Structure and Promotes Synthesis of Carbon Materials for High‐Performance Supercapacitors

Zhang

Liu

et al. 2019

ChemSusChem

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Biomass‐derived carbons have been extensively explored as electrode materials in supercapacitors. However, the type of biomass selected and its specific structure affects the synthesis of the advanced biomass‐derived carbon materials. A green and facile method for the synthesis of carbon material with nanoscale and microscale porous structures for supercapacitors has been developed, based on regulating the original cell structure of the bacterial strain. The cell structure is modified in situ by regulating the accumulation of polyhydroxyalkanoate under controlled cultivation conditions. The novel bacterial in situ modification and nitrogen doping endow this hierarchically derived carbon material with improved performance. This material exhibits an extremely high specific capacitance (420 F g−1 at 1 A g−1) and long cycling stability (97 % capacitance retention after 10 000 cycles at 5 A g−1) in aqueous electrolytes. More importantly, the symmetric supercapacitor delivers a superior energy density of 60.76 Wh kg−1 at 625 W kg−1 in an ionic liquid electrolyte system. Moreover, all components in the synthesis are low in cost, environmentally friendly, and biocompatible. With these unique features, the bacterial self‐modification mode opens new avenues into the design and production of a wide range of hierarchical structures.

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“…Nevertheless, ZnCl 2 has limited pore-creating ability because of its nonetching activation mechanism. 26,27 Moreover, the high heating rate caused by microwave irradiation also resulted in a low carbon yield.…”

Section: Introductionmentioning

confidence: 99%

Rapid synthesis of chitin‐based porous carbons with high yield, high nitrogen retention, and low cost for high‐rate supercapacitors

et al. 2019

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It is a great challenge to simultaneously achieve high yield, high nitrogen retention, and low cost for chitin-based porous carbons (PCs) while obtaining highly porous structure. Herein, copper (II) chloride dihydrate (CuCl 2 2H 2 O) is innovatively used as the microwave absorber and also porogen for direct synthesis of PCs from chitin via microwave heating. A very short duration of 10 minutes is achieved for this synthesis, because microwave irradiation renders a rapid heating rate of 126°C min −1 during the initial 5 minutes. In addition, the melted CuCl 2 wraps the chitin to preserve its overall structure during synthesis, thus obtaining a yield as high as 36% and a nitrogen retention up to 5.2%. Furthermore, a low temperature of about 600°C that triggers the redox reactions of CuCl 2 into Cu to achieve well-developed porous structure (specific surface area up to 1535 m 2 g −1 ) is observed, suggesting a merit of low cost for this synthesis. The PC-based electrode exhibits not only a high specific capacitance of 227 F g −1 at 0.5 A g −1 in 6 mol L −1 KOH electrolyte but also a good rate capability with a high capacitance retention of 67.7% even at an ultrahigh current density of 50 A g −1 . Owing to these promising capacitive performances of PCs, the fabricated supercapacitor can remain 70.1% of the energy density when the power density was dramatically increased by 20 times.KEYWORDS chitin-based carbon, CuCl 2 porogen, high-rate supercapacitor, microwave-assisted synthesis, electrode material

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Naturally derived carbon nanofibers as sustainable electrocatalysts for microbial energy harvesting: A new application of spider silk

Cited by 80 publications

References 49 publications

Advanced Biomass‐Derived Electrocatalysts for the Oxygen Reduction Reaction

Advanced Biomass‐Derived Electrocatalysts for the Oxygen Reduction Reaction

Polyhydroxyalkanoate‐Modified Bacterium Regulates Biomass Structure and Promotes Synthesis of Carbon Materials for High‐Performance Supercapacitors

Rapid synthesis of chitin‐based porous carbons with high yield, high nitrogen retention, and low cost for high‐rate supercapacitors

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