Metal-free carbon semi-tubes for oxygen reduction electrocatalysis

Chen, Menghui; Chen, Junxiang; Jia, Chunguang; Luo, Jin; Yang, Zhili; Jung, Joey Chung-Yen; Zhang, Jiujun; Chen, Shengli; Zhang, Shiming

doi:10.1016/j.xcrp.2022.101204

Cited by 14 publications

(8 citation statements)

References 55 publications

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“…In addition, the curvature of carbon nanotubes also affects the electric field and charge distribution on their surfaces, thereby influencing their electrochemical properties. For example, Chen et al [55] discussed the synthesis and characterization of non-metallic carbon semi-tubes (CST) for oxygen reduction electrocatalysis. The researchers successfully constructed CST morphology using mesoporous silica nanoparticles as soft templates and polymerization of meta-phenylenediamine (mPDA) (Figure 8a).…”

Section: Oxygen Evolution Reaction and Oxygen Reduction Reactionmentioning

confidence: 99%

“…(d) APEFC performance using 40 % PtRu/C (loading of 0.4 mg cm À 2 ) as the anode catalyst and N-CSTmPDA (loading of 2 mg cm À 2 ) as the cathode catalyst. [55] Copyright© 2022 The Authors. (e) Classification of different C atoms on γGyNTs and calculated charge of C1À and C1 ?…”

Section: Oxygen Evolution Reaction and Oxygen Reduction Reactionmentioning

confidence: 99%

“…Red and black indicate the high and low curvature cases, respectively. (d) APEFC performance using 40 % PtRu/C (loading of 0.4 mg cm À 2 ) as the anode catalyst and N-CSTmPDA (loading of 2 mg cm À 2 ) as the cathode catalyst [55]. Copyright© 2022 The Authors.…”

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confidence: 99%

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Unraveling the Impact of Curvature on Electrocatalytic Performance of Carbon Materials: A State‐of‐the‐Art Review

Wen,

Zhao,

Luo

et al. 2024

ChemSusChem

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Curvature of carbon materials have gained significant attention as catalysts due to their distinctive properties and potential applications. This review comprehensively summarizes how the bending of carbon materials can improve electrocatalytic performance, with special attention to the applications of various bent carbon materials (such as carbon nanotubes, graphene, and fullerene) in electrocatalysts and a large number of related density functional theory (DFT) theoretical calculations. Extensive mechanism research has provided a wealth of evidence indicating that the curvature of carbon materials has a profound impact on catalytic activity. This improvement in catalytic performance by curved carbon materials is attributed to factors like a larger active surface area, modulation of electronic structure, and better dispersal of catalytic active sites. A comprehensive understanding and utilization of these effects enable the design of highly efficient carbon‐based catalysts for applications in energy conversion, environmental remediation, and chemical synthesis.

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Section: Oxygen Evolution Reaction and Oxygen Reduction Reactionmentioning

confidence: 99%

Section: Oxygen Evolution Reaction and Oxygen Reduction Reactionmentioning

confidence: 99%

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Unraveling the Impact of Curvature on Electrocatalytic Performance of Carbon Materials: A State‐of‐the‐Art Review

Wen,

Zhao,

Luo

et al. 2024

ChemSusChem

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“…Zhao et al [69] studied a N-doped multilayer graphene (N-MLG) through thermal decomposition of milk powder with Fe 2+ ions as catalytic growth agents at 1000 °C for 45-120 min, and found that pyrolysis time had a remarkable effect on the content and type of N-species with a direct correlation toward ORR activity Usually, a volcano plot between catalytic activity and pyrolysis time can be obtained. [70][71][72][73][74] Scharf et al [74] discussed how could the pyrolysis conditions (including the temperature and time) affect the activity and stability of fuel cell through analysis of carbon morphology and iron species based on the characterization of Raman and Mössbauer spectroscopy. Differently, Tei et al [75] observed the dynamic fluctuation of ORR activity with the pyrolysis time used in preparation of Fe-N-C catalyst through sintering an Fe-porphyrin derivative of hemin.…”

Section: Optimization Of Pyrolysis Proceduresmentioning

confidence: 99%

Identification and Understanding of Active Sites of Non‐Noble Iron‐Nitrogen‐Carbon Catalysts for Oxygen Reduction Electrocatalysis

Yang

Chen

Zhang

et al. 2023

Adv Funct Materials

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Non-noble iron-nitrogen-carbon (Fe-N-C) catalysts have been explored as one type of the most promising alternatives of precious platinum (Pt) in catalyzing the oxygen reduction reaction (ORR). However, their catalytic ORR activity and stability still cannot meet the requirement of practical applications. Active sites in such catalysts are the key factors determining the catalytic performance. This review gives a critical overview on identification and understanding of active sties of non-pyrolytic and pyrolytic Fe-N-C catalysts in terms of design strategies, synthesis, characterization, functional mechanisms and performance validation. The diversity and complexity of active sites that greatly dominate the progress of Fe-N-C catalysts include Fe-containing sites (Fe-based nanoparticles and single-atom Fe-species) and metalfree sites (heteroatoms doping and defects). Meanwhile, synergistic effects are also discussed in this review with emphasis on the interaction among multiple active sites. Although substantial endeavors have been devoted to develop the efficient Fe-N-C catalysts, some challenges still remain. To facilitate further research on Fe-N-C catalysts toward practical applications, some research perspectives are prospected in the aspects of innovative synthesis methods, active-sites modulation strategies, high-resolution ex situ/in situ/ operando characterization techniques, theoretical calculations, and so on. This review may provide a guideline for identifying and understanding activesites for developing high-performance Fe-N-C catalysts.

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“…Although carbon-based materials have some shortcomings when used as the supports of Pt-based ORR catalysts, their important roles in achieving practical catalytic performance are obvious due to their high conductivity, large surface area, reasonable pore structure, and mechanical property. 33 Based on our previous explorations for carbon morphology, 34 , 35 this work employs a facile microwave reduction method for synthesizing the semi-tubular Pt-based catalyst. The synthesized N-doped carbon semi-tube (N-CST) support shows strong interaction and anchoring ability with Pt nanoparticles to form high-performance Pt/N-CST catalyst.…”

Section: Introductionmentioning

confidence: 99%

Engineering carbon semi-tubes supported platinum catalyst for efficient oxygen reduction electrocatalysis

Cai¹,

Chen²,

Chen³

et al. 2023

iScience

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Metal-free carbon semi-tubes for oxygen reduction electrocatalysis

Cited by 14 publications

References 55 publications

Unraveling the Impact of Curvature on Electrocatalytic Performance of Carbon Materials: A State‐of‐the‐Art Review

Unraveling the Impact of Curvature on Electrocatalytic Performance of Carbon Materials: A State‐of‐the‐Art Review

Identification and Understanding of Active Sites of Non‐Noble Iron‐Nitrogen‐Carbon Catalysts for Oxygen Reduction Electrocatalysis

Engineering carbon semi-tubes supported platinum catalyst for efficient oxygen reduction electrocatalysis

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