Nitrogen‐Enriched Core‐Shell Structured Fe/Fe<sub>3</sub>C‐C Nanorods as Advanced Electrocatalysts for Oxygen Reduction Reaction

Wen, Zhenhai; Ci, Suqin; Zhang, Fei; Feng, Xinliang; Cui, Shumao; Mao, Shun; Luo, Shenglian; He, Zhen; Chen, Junhong

doi:10.1002/adma.201104392

Cited by 520 publications

(325 citation statements)

References 28 publications

Supporting

Mentioning

309

Contrasting

Unclassified

Order By: Relevance

“…Some melamine molecules may be adsorbed on the graphene surface through π–π interaction, allowing uniform and high‐density N ‐doping of the graphene sheets. In addition, the nitrogen‐containing polymer (e.g., polymeric melem24), evolved from melamine during pyrolysis, was decomposed along with the simultaneous release of a large amount of carbon nitride gases (e.g., C 2 N 2 + , C 3 N 2 + , and C 3 N 3 + ) 25. These gases evolve into the N ‐doped graphene structures and coordinate with Fe to generate Fe‐N x active sites.…”

Section: Resultsmentioning

confidence: 99%

High‐Performance Direct Methanol Fuel Cells with Precious‐Metal‐Free Cathode

et al. 2016

View full text Add to dashboard Cite

Direct methanol fuel cells (DMFCs) hold great promise for applications ranging from portable power for electronics to transportation. However, apart from the high costs, current Pt‐based cathodes in DMFCs suffer significantly from performance loss due to severe methanol crossover from anode to cathode. The migrated methanol in cathodes tends to contaminate Pt active sites through yielding a mixed potential region resulting from oxygen reduction reaction and methanol oxidation reaction. Therefore, highly methanol‐tolerant cathodes must be developed before DMFC technologies become viable. The newly developed reduced graphene oxide (rGO)‐based Fe‐N‐C cathode exhibits high methanol tolerance and exceeds the performance of current Pt cathodes, as evidenced by both rotating disk electrode and DMFC tests. While the morphology of 2D rGO is largely preserved, the resulting Fe‐N‐rGO catalyst provides a more unique porous structure. DMFC tests with various methanol concentrations are systematically studied using the best performing Fe‐N‐rGO catalyst. At feed concentrations greater than 2.0 m, the obtained DMFC performance from the Fe‐N‐rGO cathode is found to start exceeding that of a Pt/C cathode. This work will open a new avenue to use nonprecious metal cathode for advanced DMFC technologies with increased performance and at significantly reduced cost.

show abstract

Section: Resultsmentioning

confidence: 99%

High‐Performance Direct Methanol Fuel Cells with Precious‐Metal‐Free Cathode

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Heteroatom doping or hybridization with metal species represents an efficient way to enhance the activity of carbon-based catalysts towards oxygen reduction reaction (ORR)/OER reactions [39][40][41][42]. The presence of heteroatoms (e.g., N) and metal species not only reduces the local work function on carbon surface for better O2 adsorption, but also changes the charge density on the carbon surface via electron transfer effect [16,[43][44][45][46][47][48][49][50][51]. Nevertheless, the understanding on the origin of their activity and the chemical nature of the reaction pathways is still quite limited, which hinders the development of high-performance cathode catalysts.…”

Section: Introductionmentioning

confidence: 99%

Long life rechargeable Li-O2 batteries enabled by enhanced charge transfer in nanocable-like Fe@N-doped carbon nanotube catalyst

Zhou

Liu

et al. 2017

Sci. China Mater.

View full text Add to dashboard Cite

Rechargeable Li-O2 batteries have attracted considerable interests because of their exceptional energy density. However, the short lifetime still remained as one of the bottle-neck obstacles for the practical application of rechargeable Li-O2 batteries. The development of efficient cathode catalyst is highly desirable to reduce the energy barrier of Li-O2 reaction and electrode failure. In this work, we report a facile strategy for the fabrication of a high-performance cathode catalyst for rechargeable Li-O2 batteries by the encapsulation of high content of active Fe nanorods into N-doped carbon nanotubes with high stability (denoted as Fe@NCNTs). First-principles calculations reveal that the synergistic charge transfer and redistribution between the interface of Fe nanorods, the CNT walls and the active N dopants greatly facilitate the chemisorption and subsequent dissociation of O2 molecules into the epoxy intermediates on the carbon surface, which benefits the uniform growth of nanosized discharge products on CNT surface and thus boosts the reversibility of Li-O2 reactions. As a result, the cathode with Fe@NCNT catalyst exhibits long cycling stability with high capacities (1000 mA h g −1 for 160 cycles and 600 mA h g −1 for 270 cycles). Based on the total mass of Fe@NCNTs + Li2O2, high gravimetric energy densities of 2120-2600 W h kg −1 can be achieved at the power densities of 50-795 W kg −1 .

show abstract

“…The recent innovation in this subject, by using vertically aligned nitrogen containing carbon nanotubes as the catalysts of ORR, seems to launch on a very promising path to develop cathode catalysts comparable with conventional Pt-based catalysts [11]. Afterwards, various nitrogen doped carbon nanostructures (NCNs), including carbon nanotubes cup, mesoporous graphitic array, and graphene etc., were successfully applied as catalysts of ORR in alkaline medium [12][13][14][15]. Despite of these abundant achievements, there are still at least two key issues concerning these NCNs serving as commercial cathode catalysts of fuel cell or metal air.…”

mentioning

confidence: 99%

Nitrogen-doped graphene nanosheets as high efficient catalysts for oxygen reduction reaction

Zou

et al. 2012

Chin. Sci. Bull.

Self Cite

View full text Add to dashboard Cite

It is of great significance in exploring alternative catalysts to platinum (Pt)-based materials for oxygen reduction reaction (ORR), because this reaction is invariably involved in various fuel cells and metal-air batteries. We herein reported the nitrogen doped graphene nanosheets (NGNSs) with pore volume of as high as 3.42 m 3 /g and investigated their potential application as ORR catalysts, it was demonstrated the NGNSs featured high activity, improved kinetics and excellent long-term stability for ORR. The NGNSs were successfully used as cathode catalysts of microbial fuel cells (MFCs) and performed even better than the commercial Pt/C (Pt 10%) catalysts at the maximum power output.nitrogen doped graphene, oxygen reduction reaction, cathode catalysts, microbial fuel cell Citation:Ci S Q, Wu Y M, Zou J P, et al. Nitrogen-doped graphene nanosheets as high efficient catalysts for oxygen reduction reaction.

show abstract

Nitrogen‐Enriched Core‐Shell Structured Fe/Fe₃C‐C Nanorods as Advanced Electrocatalysts for Oxygen Reduction Reaction

Cited by 520 publications

References 28 publications

High‐Performance Direct Methanol Fuel Cells with Precious‐Metal‐Free Cathode

High‐Performance Direct Methanol Fuel Cells with Precious‐Metal‐Free Cathode

Long life rechargeable Li-O2 batteries enabled by enhanced charge transfer in nanocable-like Fe@N-doped carbon nanotube catalyst

Nitrogen-doped graphene nanosheets as high efficient catalysts for oxygen reduction reaction

Contact Info

Product

Resources

About

Nitrogen‐Enriched Core‐Shell Structured Fe/Fe3C‐C Nanorods as Advanced Electrocatalysts for Oxygen Reduction Reaction

Cited by 520 publications

References 28 publications

High‐Performance Direct Methanol Fuel Cells with Precious‐Metal‐Free Cathode

High‐Performance Direct Methanol Fuel Cells with Precious‐Metal‐Free Cathode

Long life rechargeable Li-O2 batteries enabled by enhanced charge transfer in nanocable-like Fe@N-doped carbon nanotube catalyst

Nitrogen-doped graphene nanosheets as high efficient catalysts for oxygen reduction reaction

Contact Info

Product

Resources

About

Nitrogen‐Enriched Core‐Shell Structured Fe/Fe₃C‐C Nanorods as Advanced Electrocatalysts for Oxygen Reduction Reaction