Facile One‐Pot, One‐Step Synthesis of a Carbon Nanoarchitecture for an Advanced Multifunctonal Electrocatalyst

Wen, Zhenhai; Ci, Suqin; Hou, Yang; Chen, Junhong

doi:10.1002/anie.201402574

Cited by 171 publications

(100 citation statements)

References 54 publications

(26 reference statements)

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“…In addition, the 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 Table 1 for comparison. [32][33][34][35][36][37][38][39][40][41][42] Clearly, N,P-GCNS is among the best bifunctional oxygen-electrode catalysts, showing great promise in the fields of rechargeable metal-air batteries and unitized regenerative fuel cells (URFC). respectively.…”

Section: Resultsmentioning

confidence: 99%

Nitrogen and Phosphorus Dual-Doped Graphene/Carbon Nanosheets as Bifunctional Electrocatalysts for Oxygen Reduction and Evolution

2015

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It is highly desirable but challenging to develop bifunctional catalysts for efficiently catalyzing both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in energy storage and conversion system. Here a simple yet cost-effective strategy is developed to fabricate nitrogen and phosphorus dual-doped graphene/carbon nanosheets (N,P-GCNS) with N,P-doped carbon sandwiching few-layer-thick graphene. The as-prepared N,P-GCNS shows outstanding catalytic activity towards both ORR and OER with a potential gap of 0.71 V between the OER potential at a current density of 10 mA cm -2 and the ORR potential at a current density of -3 mA cm -2 , illustrating that it is the best metal-free bifunctional electrocatalysts reported to date. The superb bifunctional catalytic performance is attributed to the synergistic effects between the doped N and P atoms, the full exposure of the active sites on the surface of the N,P-GCNS nanosheets, the high conductivity of the incorporated graphene, the large surface area and hierarchical pores for sufficient contact and rapid transportation of the reactants.

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Section: Resultsmentioning

confidence: 99%

Nitrogen and Phosphorus Dual-Doped Graphene/Carbon Nanosheets as Bifunctional Electrocatalysts for Oxygen Reduction and Evolution

2015

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“…S16). Therefore, the presence of S could be beneficial for enhancing ORR activity [41,47,51]. Moreover, electrochemical impedance spectroscopy (EIS) (Fig.…”

Section: Science China Materialsmentioning

confidence: 99%

“…In this way, the doping step is simplified while the element utilization efficiency is improved. Moreover, the existence of nanoparticles such as Fe, FeS, and FeN 0.05 could further boost the ORR activity by tuning the redox properties of surrounding carbon layers embedded with active sites [51]. Consequently, the resulting PmPDA-GRFe catalyst exhibited prominent ORR activity as well as excellent long-term stability both in alkaline and acidic media, surpassing those of commercial Pt/C catalyst (20 wt% Pt, Johnson Matthey).…”

Section: Introductionmentioning

confidence: 99%

Graphene-templated synthesis of sandwich-like porous carbon nanosheets for efficient oxygen reduction reaction in both alkaline and acidic media

Wang

et al. 2018

Sci. China Mater.

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Developing low-cost, high-performance electrocatalysts for the oxygen reduction reaction (ORR) is crucial for implementation of fuel cells and metal-air batteries into practical applications. Graphene-based catalysts have been extensively investigated for ORR in alkaline electrolytes. However, their performance in acidic electrolytes still requires further improvement compared to the Pt/C catalyst. Here we report a self-templating approach to prepare graphene-based sandwich-like porous carbon nanosheets for efficient ORR in both alkaline and acidic electrolytes. Graphene oxides were first used to adsorb m-phenylenediamine molecules which can form a nitrogen-rich polymer network after oxidative polymerization. Then iron (Fe) salt was introduced into the polymer network and transformed into ORR active Fe-N-C sites along with Fe, FeS, and FeN 0.05 nanoparticles after pyrolysis, generating ORR active sandwich-like carbon nanosheets. Due to the presence of multiple ORR active sites. The as-obtained catalyst exhibited prominent ORR activity with a half-wave potential~30 mV more positive than Pt/C in 0.1 mol L −1 KOH, while the half-wave potential of the catalyst was only~40 mV lower than that of commercial Pt/C in 0.1 mol L −1 HClO 4 . The unique planar sandwich-like structure could expose abundant active sites for ORR. Meanwhile, the graphene layer and porous structure could simultaneously enhance electrical conductivity and facilitate mass transport. The prominent electrocatalytic activity and durability in both alkaline and acidic electrolytes indicate that these carbon nanosheets hold great potential as alternatives to precious metalbased catalysts, as demonstrated in zinc-air batteries and proton exchange membrane fuel cells.

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“…Recently, it has been found that Fe-containing species embedded in the carbon matrix exhibit enhanced catalytic activity for the ORR, such as iron nitrides, 29 iron carbides, 30-32 iron oxides 33,34 and metallic iron. 35,36 Recent study by Zhang et al reported a type of novel bifunctional catalyst used for the oxygen reduction and evolution reactions based on N and P dual-doped porous carbon nanosheets comprising uniform FeP nanoparticles (NPs) embedded in the carbon layers. 37 This provides a new idea for the application of iron phosphides in the ORR.…”

Section: Introductionmentioning

confidence: 99%

Iron phosphide nanocrystals decorated in situ on heteroatom-doped mesoporous carbon nanosheets used for an efficient oxygen reduction reaction in both alkaline and acidic media

Shi

Chen

et al. 2017

RSC Adv.

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Oxygen reduction catalysts based on heteroatom-doped mesoporous carbon nanosheets loaded with highly crystalline FeP nanoparticles (FeP@FePNCs) were fabricated using a simple, one-step carbonization-phosphization methodology. The obtained FeP@FePNCs exhibited outstanding catalytic activity and durability towards the oxygen reduction reaction (ORR) in alkaline media. Moreover, the FeP@FePNCs also displayed high-performance in acidic media. The remarkable ORR activity originates from the synergetic effects between the embedded FeP nanoparticles and the heteroatom-doped carbon structures. Moreover, the porous structure, high specific surface area, and electron conductivity can contribute to enhance the ORR performance.

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Facile One‐Pot, One‐Step Synthesis of a Carbon Nanoarchitecture for an Advanced Multifunctonal Electrocatalyst

Cited by 171 publications

References 54 publications

Nitrogen and Phosphorus Dual-Doped Graphene/Carbon Nanosheets as Bifunctional Electrocatalysts for Oxygen Reduction and Evolution

Nitrogen and Phosphorus Dual-Doped Graphene/Carbon Nanosheets as Bifunctional Electrocatalysts for Oxygen Reduction and Evolution

Graphene-templated synthesis of sandwich-like porous carbon nanosheets for efficient oxygen reduction reaction in both alkaline and acidic media

Iron phosphide nanocrystals decorated in situ on heteroatom-doped mesoporous carbon nanosheets used for an efficient oxygen reduction reaction in both alkaline and acidic media

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