Ultra-small Fe2N nanocrystals embedded into mesoporous nitrogen-doped graphitic carbon spheres as a highly active, stable, and methanol-tolerant electrocatalyst for the oxygen reduction reaction

Xiao, Junwu; Xu, Yangyang; Xia, Yating; Xi, Jiangbo; Wang, Shuai

doi:10.1016/j.nanoen.2016.04.026

Cited by 138 publications

(80 citation statements)

References 57 publications

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“…[46] The ionic liquid induced great changes in the chemical environmentand resulted in negative and positive shifts of binding energy,w hich are mainly relatedt ot he changes in the Fermi energy,t he band center, and the work function. [49] The peak of P2pa ta bout 133.5 eV can be ascribed to theo xidized Ps pecies, indicating the presence of a PÀOb ond (Figure 3e). [48] Furthermore,t he quantitative analysis results derived from the N1ss pectraa re summarized in Figure 5g.I tc an be seen that the ionic liquid induces an enhancement for the nitrogen speciesi nt hesec atalysts.…”

Section: Resultsmentioning

confidence: 99%

Phosphorus and Fluorine Co‐Doping Induced Enhancement of Oxygen Evolution Reaction in Bimetallic Nitride Nanorods Arrays: Ionic Liquid‐Driven and Mechanism Clarification

Bai

Wang

et al. 2017

Chemistry A European J

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Electrocatalytic splitting of water is becoming increasingly crucial for renewable energy and device technologies. As one of the most important half-reactions for water splitting reactions, the oxygen evolution reaction (OER) is a kinetically sluggish process that will greatly affect the energy conversion efficiency. Therefore, exploring a highly efficient and durable catalyst to boost the OER is of great urgency. In this work, we develop a facile strategy for the synthesis of well-defined phosphorus and fluorine co-doped Ni Co N hybrid nanorods (HNs) by using ionic liquids (ILs; 1-butyl-3-methylimidazolium hexafluorophosphate). In comparison to the IrO catalyst, the as-obtained PF/Ni Co N HNs manifests a low overpotential of 280 mV at 10 mA cm , Tafel slope of 66.1 mV dec , and excellent durability in 1.0 m KOH solution. Furthermore, the iR-corrected electrochemical results indicate it could achieve a current density of 100 mA cm at an overpotential of 350 mV. The combination of cobalt and nickel elements, 1D mesoporous nanostructure, heteroatom incorporation, and ionic liquid-assisted nitridation, which result in faster charge transfer capability and more active surface sites, can facilitate the release of oxygen bubbles from the catalyst surface. Our findings confirm that surface heteroatom doping in bimetallic nitrides could serve as a new class of OER catalyst with excellent catalytic activity.

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Section: Resultsmentioning

confidence: 99%

Phosphorus and Fluorine Co‐Doping Induced Enhancement of Oxygen Evolution Reaction in Bimetallic Nitride Nanorods Arrays: Ionic Liquid‐Driven and Mechanism Clarification

Bai

Wang

et al. 2017

Chemistry A European J

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“…The peaks at 710.6 and 712.4 eV correspond to Fe 2+ and Fe 3+ and are ascribed to Fe 2+ −O/N and Fe 3+ −O/N bonds. However, iron oxides or hydrated iron oxides cannot be detected by XRD; thus, the oxidation is believed to occur only on the surface . In addition, the peaks at 715.1 and 719.5 eV are considered as satellite peaks of Fe 2+ and Fe 3+ , respectively .…”

Section: Figurementioning

confidence: 99%

“…However, iron oxides or hydrated iron oxides cannot be detected by XRD; thus, the oxidation is believed to occur only on the surface . In addition, the peaks at 715.1 and 719.5 eV are considered as satellite peaks of Fe 2+ and Fe 3+ , respectively . The peak at 780.5 eV in the Co 2p 3/2 XPS spectrum (Figure i) can be assigned to Co 2+ coordinated to O or N ions and is attributed to the Co 2 N phase .…”

Section: Figurementioning

confidence: 99%

Fe₃N‐Co₂N Nanowires Array: A Non‐Noble‐Metal Bifunctional Catalyst Electrode for High‐Performance Glucose Oxidation and H₂O₂ Reduction toward Non‐Enzymatic Sensing Applications

Zhou

Cao

Wang

et al. 2017

Chemistry A European J

117

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Among reported electrode materials, a nanoarray is an attractive architecture for molecular detection because of its large specific surface area and easy accessibility for target molecules. Here, a new Fe N-Co N nanowires array grown on carbon cloth (Fe N-Co N/CC) is reported as a non-noble-metal bifunctional catalyst electrode for high-performance glucose oxidation and H O reduction. As an electrochemical non-enzymatic sensor for glucose detection, Fe N-Co N/CC shows a fast response time of 8 s, a low detection limit (LOD) of 77 nm (signal/noise=3), and a high sensitivity of 4333.7 μA mm cm . As an H O sensor, it shows a LOD of 59 nm (signal/noise=3) and a sensitivity of 2273.8 μA mm cm with a response time of 2 s. In addition, the proposed sensor is stable with high selectivity, specificity, and reproducibility, and its application for real sample analysis has been successfully demonstrated.

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“…The Ni and Co elements are relativelye nvironmentally friendly,a nd their alloys exhibit high electrocatalytic performance for the ORR. [56] Compoundso fT Ms in the first row are still the most widely investigated, and these include CoO, [57] Co 9 S 8 , [58] NiCo 2 S 4 , [59] NiCoMnO 4 , [60] Fe 2 N, [61] Fe 3 C, [62] Fe 3 O 4 , [63] and CoP. [55] Although the electrocatalytic activityo fF e-nanoparticle-decorated N-C materials for the ORR is excellent, it is still inferior to that of substrates modulated by the FeCo, FeNi, and FeCoNia lloys.…”

Section: Heterojunction Strategiesmentioning

confidence: 99%

Stable and Efficient Nitrogen‐Containing Carbon‐Based Electrocatalysts for Reactions in Energy‐Conversion Systems

et al. 2018

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High activity and stability are crucial for the practical use of electrocatalysts in fuel cells, metal-air batteries, and water electrolysis, including the oxygen reduction reaction, hydrogen evolution reaction, oxygen evolution reaction, and oxidation reactions of formic acid and alcohols. Electrocatalysts based on nitrogen-containing carbon (N-C) materials show promise in catalyzing these reactions; however, there is no systematic review of strategies for the engineering of active and stable N-C-based electrocatalysts. Herein, a comprehensive comparison of recently reported N-C-based electrocatalysts regarding both electrocatalytic activity and long-term stability is presented. In the first part of this review, the relationships between the electrocatalytic reactions and selection of the element to modify the N-C-based materials are discussed. Afterwards, synthesis methods for N-C-based electrocatalysts are summarized, and strategies for the synthesis of highly stable N-C-based electrocatalysts are presented. Multiple tables containing data on crucial parameters for both electrocatalytic activity and stability are displayed in this review. Finally, constructing M-N moieties is proposed as the most promising engineering strategy for stable N-C-based electrocatalysts.

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Ultra-small Fe2N nanocrystals embedded into mesoporous nitrogen-doped graphitic carbon spheres as a highly active, stable, and methanol-tolerant electrocatalyst for the oxygen reduction reaction

Cited by 138 publications

References 57 publications

Phosphorus and Fluorine Co‐Doping Induced Enhancement of Oxygen Evolution Reaction in Bimetallic Nitride Nanorods Arrays: Ionic Liquid‐Driven and Mechanism Clarification

Phosphorus and Fluorine Co‐Doping Induced Enhancement of Oxygen Evolution Reaction in Bimetallic Nitride Nanorods Arrays: Ionic Liquid‐Driven and Mechanism Clarification

Fe₃N‐Co₂N Nanowires Array: A Non‐Noble‐Metal Bifunctional Catalyst Electrode for High‐Performance Glucose Oxidation and H₂O₂ Reduction toward Non‐Enzymatic Sensing Applications

Stable and Efficient Nitrogen‐Containing Carbon‐Based Electrocatalysts for Reactions in Energy‐Conversion Systems

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Ultra-small Fe2N nanocrystals embedded into mesoporous nitrogen-doped graphitic carbon spheres as a highly active, stable, and methanol-tolerant electrocatalyst for the oxygen reduction reaction

Cited by 138 publications

References 57 publications

Phosphorus and Fluorine Co‐Doping Induced Enhancement of Oxygen Evolution Reaction in Bimetallic Nitride Nanorods Arrays: Ionic Liquid‐Driven and Mechanism Clarification

Phosphorus and Fluorine Co‐Doping Induced Enhancement of Oxygen Evolution Reaction in Bimetallic Nitride Nanorods Arrays: Ionic Liquid‐Driven and Mechanism Clarification

Fe3N‐Co2N Nanowires Array: A Non‐Noble‐Metal Bifunctional Catalyst Electrode for High‐Performance Glucose Oxidation and H2O2 Reduction toward Non‐Enzymatic Sensing Applications

Stable and Efficient Nitrogen‐Containing Carbon‐Based Electrocatalysts for Reactions in Energy‐Conversion Systems

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Fe₃N‐Co₂N Nanowires Array: A Non‐Noble‐Metal Bifunctional Catalyst Electrode for High‐Performance Glucose Oxidation and H₂O₂ Reduction toward Non‐Enzymatic Sensing Applications