Nitrogen- and sulfur-doped carbon nanoplatelets via thermal annealing of alkaline lignin with urea as efficient electrocatalysts for oxygen reduction reaction

Zhang, Xianlei; Yu, Dingling; Zhang, Yaqing; Guo, Wang; Ma, Xiuxiu; He, Xingquan

doi:10.1039/c6ra21958f

Cited by 32 publications

(20 citation statements)

References 49 publications

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“…The relative composition of N species is shown in Figure b. The pyridinic N and pyrrolic N contents are reduced whereas graphitic N content is gradually increased on rising of annealing temperature, indicating that pyridinic and pyrrolic N are less stable than graphitic N at higher temperature . The oxidized N content slightly increase from 6 to 6.9 % with temperature increase from 700 to 900 °C, but it decreases to 4.3 % at 1000 °C.…”

Section: Resultsmentioning

confidence: 99%

Iron Phosphide Incorporated into Iron‐Treated Heteroatoms‐Doped Porous Bio‐Carbon as Efficient Electrocatalyst for the Oxygen Reduction Reaction

et al. 2018

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The development of electrocatalysts from inexpensive, natural sources has been an attractive subject owing to economic, environmental, sustainable, and social merits. Herein, Fe-treated heteroatoms (N, P, and S)-doped porous carbons are synthesized for the first time by pyrolysis of bio-char derived from abundant human urine waste as a single precursor for carbon and heteroatoms, using iron(III) acetylacetonate as an external Fe precursor, followed by acid leaching and activation with a second pyrolysis step in NH 3 . In particular, the sample prepared at a pyrolysis temperature of 800 8C (FeP-NSC-800) contains iron phosphide (FeP, Fe 2 P) in the high-porosity heteroatoms-doped carbon framework along with Fe traces, and exhibits excellent oxygen reduction reaction (ORR) activity and stability in both alkaline and acidic electrolytes as demonstrated in half-and single-cell tests. Such excellent ORR catalytic performance is ascribed to a synergistic effect of not only multiple active FeÀP, FeÀN, and pyridinic and graphitic N species in the electrocatalyst but also facile transport channels provided by its hierarchical porous structure with micro-/mesopores. In addition, the sample exhibits high long-term durability and methanol crossover resistance.

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Section: Resultsmentioning

confidence: 99%

Iron Phosphide Incorporated into Iron‐Treated Heteroatoms‐Doped Porous Bio‐Carbon as Efficient Electrocatalyst for the Oxygen Reduction Reaction

et al. 2018

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“…A 3D N‐doped porous carbon with a large specific surface area (1012 m 2 g −1 ) also displayed high ORR catalytic activity and remarkable durability with a retention of 96.5% after 20 000 s . In addition, alkaline lignin‐derived N, S dual‐doped carbon nanoplatelets showed comparable ORR electrocatalytic activity, superior stability, and methanol tolerance to the commercial Pt/C catalyst in both alkaline and acidic electrolyte …”

Section: Applications Of Lignin‐derived Materials In Electrochemical mentioning

confidence: 99%

Lignin‐derived electrochemical energy materials and systems

Jiang

Wang

et al. 2020

Biofuels Bioprod Bioref

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Electrode and electrolyte materials with higher performance, longer life, and lower cost need to be developed, given the substantial growing demand for advanced electrochemical energy systems. Lignin, the second most abundant natural polymer, has been successfully demonstrated to be a viable precursor or feedstock for the preparation of high-performance electrochemical energy materials and components such as electrodes, electrolyte additives, membrane separators, and binders. Moreover, techno-economic analyses indicate that it is possible to prepare cost-effective carbon structures from lignin at engineering scale, in contrast with current carbon products. These facts suggest that the scalable conversion of lignin into high-value energy materials will offer a promising pathway to not only promote the utilization and valorization of lignin but also boost the development of advanced electrochemical energy systems. This review examines cutting-edge renewable energy materials derived from various lignin compounds and Review: Lignin to energy materials X Wu et al.their applications in electrochemical energy systems with an emphasis on supercapacitors, rechargeable batteries, and fuel cells. Meanwhile, this review also aims to carve out the critical barriers for lignin-derived high-performance materials for energy applications, and to identify viable approaches for the synthesis of sustainable new energy materials.

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“…2c, the Co-CoO@C/C exhibits signicantly lower BET specic surface area than that of the Co-CoO@NC/NC-800. This might be due to the reason that the thermal decomposition of urea during the calcination would produce a large amount of gases, such as CO 2 , NH 3 , and other gaseous products, 46,47 which are helpful to the formation of the porous structure in the Co-CoO@NC/NC-800. Most interestingly, although the Co-CoO@NC/NC-700 and the Co-CoO@NC/NC-900 exhibit the N 2 adsorption/desorption isotherms comparable to those of the Co-CoO@NC/NC-800, their BET specic surface areas are much lower than that of the Co-CoO@NC/NC-800.…”

Section: Electrochemical Measurementmentioning

confidence: 99%

Core@shell structured Co–CoO@NC nanoparticles supported on nitrogen doped carbon with high catalytic activity for oxygen reduction reaction

et al. 2018

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Nitrogen- and sulfur-doped carbon nanoplatelets via thermal annealing of alkaline lignin with urea as efficient electrocatalysts for oxygen reduction reaction

Abstract: Novel N–S–C hybrids were synthesized by a facile one-step pyrolysis method, in which the obtained N–S–C 900 was a robust catalyst with enhanced ORR activity and excellent operational stability in alkaline media, superior to the Pt/C catalyst.

Cited by 32 publications

References 49 publications

Iron Phosphide Incorporated into Iron‐Treated Heteroatoms‐Doped Porous Bio‐Carbon as Efficient Electrocatalyst for the Oxygen Reduction Reaction

Iron Phosphide Incorporated into Iron‐Treated Heteroatoms‐Doped Porous Bio‐Carbon as Efficient Electrocatalyst for the Oxygen Reduction Reaction

Lignin‐derived electrochemical energy materials and systems

Core@shell structured Co–CoO@NC nanoparticles supported on nitrogen doped carbon with high catalytic activity for oxygen reduction reaction

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