Fe@N‐Graphene Nanoplatelet‐Embedded Carbon Nanofibers as Efficient Electrocatalysts for Oxygen Reduction Reaction

Ju, Young Wan; Yoo, Seonyoung; Kim, Changmin; Kim, Seona; Jeon, In Yup; Shin, Jeeyoung; Baek, Jong‐Beom; Kim, Guntae

doi:10.1002/advs.201500205

Cited by 48 publications

(33 citation statements)

References 36 publications

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“…A novel nitrogen-doped-graphene nanoplatelets of Fe@N-graphene nanoplatelet-embedded carbon nanofibers was proposed by Ju et al [94], delivering half-wave potential value 0.8 V vs. RHE (Figure 6), which is the same as Pt. Its high activity was due to the high number of functional groups.…”

Section: Dual Hetero-atom Doped Electrocatalystsmentioning

confidence: 99%

Non-Precious Electrocatalysts for Oxygen Reduction Reaction in Alkaline Media: Latest Achievements on Novel Carbon Materials

et al. 2016

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Low temperature fuel cells (LTFCs) are considered as clean energy conversion systems and expected to help address our society energy and environmental problems. Up-to-date, oxygen reduction reaction (ORR) is one of the main hindering factors for the commercialization of LTFCs, because of its slow kinetics and high overpotential, causing major voltage loss and short-term stability. To provide enhanced activity and minimize loss, precious metal catalysts (containing expensive and scarcely available platinum) are used in abundance as cathode materials. Moreover, research is devoted to reduce the cost associated with Pt based cathode catalysts, by identifying and developing Pt-free alternatives. However, so far none of them has provided acceptable performance and durability with respect to Pt electrocatalysts. By adopting new preparation strategies and by enhancing and exploiting synergetic and multifunctional effects, some elements such as transition metals supported on highly porous carbons have exhibited reasonable electrocatalytic activity. This review mainly focuses on the very recent progress of novel carbon based materials for ORR, including: (i) development of three-dimensional structures; (ii) synthesis of novel hybrid (metal oxide-nitrogen-carbon) electrocatalysts; (iii) use of alternative raw precursors characterized from three-dimensional structure; and (iv) the co-doping methods adoption for novel metal-nitrogen-doped-carbon electrocatalysts. Among the examined materials, reduced graphene oxide-based hybrid electrocatalysts exhibit both excellent activity and long term stability.

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Section: Dual Hetero-atom Doped Electrocatalystsmentioning

confidence: 99%

Non-Precious Electrocatalysts for Oxygen Reduction Reaction in Alkaline Media: Latest Achievements on Novel Carbon Materials

et al. 2016

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“…[5][6][7][8][9][10] The cathodic oxygen reduction reaction (ORR) is a critical process in fuel cells and largely decides their ultimate performance. [11][12][13][14] Although platinum (Pt) and platinum-based alloys are the best known ORR catalysts, the scarcity and declining activity of Pt-based catalysts significantly impede their practical use. 15 Therefore, the development of electrocatalysts with low price, high-efficiency and high stability as an alternative to Pt for the ORR is urgently needed.…”

Section: Introductionmentioning

confidence: 99%

A Bonded Double-Doped Graphene Nanoribbon Framework for Advanced Electrocatalysis

Chen

Xiao

Liu

et al. 2016

ACS Appl. Mater. Interfaces

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The preparation of a low-cost, high-efficient, and stable electrocatalyst as an alternative to platinum for the oxygen reduction reaction (ORR) is especially important to various energy storage components, such as fuel cells and metal-air batteries. Here, we report a new type of bonded double-doped graphene nanoribbon-based nonprecious metal catalysts in which Fe3C nanoparticles embedded in Fe-N-doped graphene nanoribbon (GNRs) frameworks through a simple pyrolysis. The as-obtained catalyst possesses several desirable merits for the ORR, such as diverse high-efficiency catalytic sites, a high specific surface area, an ideal hierarchical cellular structure, and a highly conductive N-doped GNR network. Accordingly, the prepared catalyst shows a superior ORR activity (an onset potential of 0.02 V and a half-wave potential of -0.148 V versus an Ag/AgCl electrode) in alkaline media, close to the commercial Pt/C catalyst. Moreover, it also displays good ORR behavior in an acidic solution.

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“…graphene structures have been suggested as promising catalyst supports. [24,25] In electrocatalysts with MÀNÀC functionalized group, two crucial factors govern the enhanced ORR activities, i. e., (i) the elemental composition and the interaction between different components, which determine the intrinsic nature of active site; and (ii) interplanar spacing of the neighboring graphene sheets allowing both sides of each graphene sheet to be accessible to the ORR-relevant species (H + , O 2 , H 2 O). [23] Recently, several research groups have reported that transition metal (Fe, Co) substitution in the nitrogen-doped carbon-based material (MÀNÀC) could improve ORR activities.…”

Section: Introductionmentioning

confidence: 99%

“…[23] Recently, several research groups have reported that transition metal (Fe, Co) substitution in the nitrogen-doped carbon-based material (MÀNÀC) could improve ORR activities. FeÀNÀC functional groups in this graphene nanoplatelets (GnPs) offering the additional catalytic active sites for ORR can lower the amount of Pt while maintaining ORR performance [25] . [24,26] In these regards, we designed a new catalyst by anchoring low amount of Pt on the substrate of iron (Fe) and nitrogen (N) co-doped graphene nanoplatelets (FeNÀGnPs).…”

Section: Introductionmentioning

confidence: 99%

A New Strategy for Outstanding Performance and Durability in Acidic Fuel Cells: A Small Amount Pt Anchored on Fe, N co‐Doped Graphene Nanoplatelets

et al. 2018

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Development of cost‐effective and efficient electrocatalysts for the oxygen reduction reaction (ORR) is one of the most important topics in the polymer electrolyte membrane fuel cells (PEMFCs). Herein, we suggested the enhanced electrochemical catalyst with nanoscale platinum anchored on iron (Fe) and nitrogen (N) co‐doped graphene nanoplatelets (Pt/FeN‐GnPs) with low content of Pt. The nanoscale platinum particles are uniformly anchored on the surface of FeN‐GnPs and result in excellent oxygen reduction activity and stability in acidic media. The fascinating interaction between Pt particles and FeN−GnPs substrate contributed to advanced oxygen reduction activity, outstanding cell performance, and remarkable high stability for acidic PEM fuel cells.

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Fe@N‐Graphene Nanoplatelet‐Embedded Carbon Nanofibers as Efficient Electrocatalysts for Oxygen Reduction Reaction

Cited by 48 publications

References 36 publications

Non-Precious Electrocatalysts for Oxygen Reduction Reaction in Alkaline Media: Latest Achievements on Novel Carbon Materials

Non-Precious Electrocatalysts for Oxygen Reduction Reaction in Alkaline Media: Latest Achievements on Novel Carbon Materials

A Bonded Double-Doped Graphene Nanoribbon Framework for Advanced Electrocatalysis

A New Strategy for Outstanding Performance and Durability in Acidic Fuel Cells: A Small Amount Pt Anchored on Fe, N co‐Doped Graphene Nanoplatelets

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