Fe/Ni-N-CNFs electrochemical catalyst for oxygen reduction reaction/oxygen evolution reaction in alkaline media

Wang, Zhuang; Li, Mian; Fan, Liquan; Han, Jia-Jun; Xiong, Yueping

doi:10.1016/j.apsusc.2016.12.242

Cited by 69 publications

(35 citation statements)

References 44 publications

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“…[13,14] Based on the above structure, wrapping the metals with thin carbon layers is expected to further increaset heir catalytic performance when considering that the formed coreshell nanostructure could significantly accelerate the interfacial electron transfer,e nrich the active sites, and avoid the direct contact of metal with electrolyte. [15,16] Wu and co-workers [17] prepared carbon shells encapsulating Fe 3.5 Ni nanoparticles (PFSA-Fe 3.5 Ni)v ia Fe 2 (SO 4 ) 3 and NiSO 4 ,b yf irstly mixingi np erfluorosulfonic acid/polytetrafluoroethylene copolymer,a nd then washing and drying, and lastly pyrolyzing with dicyandiamide, which displayed ap rominent bifunction catalytic performance owing to the conjugation effects of the graphiticcarbon shell and Fe 3.5 Ni core. Wang et al [18] utilized an electrospinningt echnique to produce different sizes of Fe/Ni alloy nanoparticles encapsulated in carbon nanofibers with an itrogen-doped hybrid (denoted as Fe/Ni-NGNFs).…”

Section: Introductionmentioning

confidence: 99%

FeNi Alloy Nanoparticles Encapsulated in Carbon Shells Supported on N‐Doped Graphene‐Like Carbon as Efficient and Stable Bifunctional Oxygen Electrocatalysts

Yang

et al. 2020

Chemistry A European J

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The development of cost‐effective and durable oxygen electrocatalysts remains highly critical but challenging for energy conversion and storage devices. Herein, a novel FeNi alloy nanoparticle core encapsulated in carbon shells supported on a N‐enriched graphene‐like carbon matrix (denoted as FeNi@C/NG) was constructed by facile pyrolyzing the mixture of metal salts, glucose, and dicyandiamide. The in situ pyrolysis of dicyandiamide in the presence of glucose plays a significant effect on the fabrication of the porous FeNi@C/NG with a high content of doped N and large specific surface area. The optimized FeNi@C/NG catalyst displays not only a superior catalytic performance for the oxygen reduction reaction (ORR, with an onset potential of 1.0 V and half‐wave potential of 0.84 V) and oxygen evolution reaction (OER, the potential at 10 mA cm−2 is 1.66 V) simultaneously in alkaline, but also outstanding long‐term cycling durability. The excellent bifunctional ORR/OER electrocatalytic performance is ascribed to the synergism of the carbon shell and FeNi alloy core together with the high‐content of nitrogen doped on the large specific surface area graphene‐like carbon.

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Section: Introductionmentioning

confidence: 99%

FeNi Alloy Nanoparticles Encapsulated in Carbon Shells Supported on N‐Doped Graphene‐Like Carbon as Efficient and Stable Bifunctional Oxygen Electrocatalysts

Yang

et al. 2020

Chemistry A European J

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“…Wang, Li, Fan, Han, and Xiong have shown that the work done is important for the regulation of the crystal structure for oxygen reduction. According to this study, while oxygen was reduced, the (111) crystal surface showed more activity …”

Section: Resultsmentioning

confidence: 63%

“…While oxygen reduction takes place, the species in the crystal mesh are also rearranged. This explains the changes in the crystal structure . According to Blizanac, Ross, and Markovic, the dissociation energy of O 2 is quite large (498 kJ mol −1 ), meaning that dissociation is energetically unfavorable unless the M–O bond is very strong (>250 kJ mol −1 ).…”

Section: Resultsmentioning

confidence: 92%

“…This explains the changes in the crystal structure. 4 According to Blizanac, Ross, and Markovic, the dissociation energy of O 2 is quite large (498 kJ mol −1 ), meaning that dissociation is energetically unfavorable unless the M-O bond is very strong (>250 kJ mol −1 ). The more energetically favored path is the superoxo/peroxo path, with the transfer of the electron to the oxygen molecule.…”

Section: Resultsmentioning

confidence: 99%

“…In the discharge process, oxidation reactions occur to the metal anode with metal dissolved in the electrolyte and oxygen reduction reaction (ORR) is induced in the air cathode. [2][3][4][5][6] The main challenges related to air cathode progress are the insufficient utilization of the anode as a result of passivation and corrosion of the electrode, insufficient ORR activity, and high over potential. [7][8][9][10] This situation causes a decrease in cell potential.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The behavior of chemical and electrochemical Ag deposition on FeNi‐mesh cathodes in Al‐air battery

Mutlu

Yazıcı

2018

Int J Energy Res

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Summary In this study, FeNi/Ag cathode was made for aluminium air battery. For this purpose, FeNi‐mesh electrode surfaces were treated in two different ways (chemical and electrochemical deposition), with noble metal silver having a high catalytic activity. The optimum time for both methods was determined. The electrochemical properties were determined using cyclic voltammogram (CV), electrochemical impedance spectroscopy (EIS), and current‐potential (i‐t) curves. The battery performance tests were performed, and surface characteristics of the electrodes were determined with a scanning electron microscope an X‐ray diffraction method (SEM‐EDS and XRD). This study shows that FeNi mesh electrodes chemically and electrochemically deposited with silver are alternative for oxygen‐reducing cathodes for aluminium air battery because they are cheap, practical, and effective. The electrochemical (FeNi/Ag‐ED) deposition is better than the chemical (FeNi/Ag‐CD) deposition in terms of both economical and higher battery potential.

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Robust and Highly Active FeNi@NCNT Nanowire Arrays as Integrated Air Electrode for Flexible Solid‐State Rechargeable Zn‐Air Batteries

Zhao

Abbas

Huang

et al. 2018

Adv Materials Inter

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The most challenging issue in flexible/portable energy storage devices, such as metal‐air batteries, is the insufficient electrocatalytic performance of the air‐electrode for oxygen reduction/evolution reactions due to low activity and decomposition of the electrocatalyst from the electrode's surface. In an effort to overcome these barriers, robust and highly active FeNi@NCNTs nanowire arrays are rationally synthesized on carbon cloth which directly serves as an integrated air‐electrode for zinc‐air batteries. FeNi@NCNTs/CC shows excellent bifunctional electrochemical performances toward oxygen reduction reaction (onset potential = 0.95 V, half‐wave potential = 0.77 V vs RHE) and oxygen evolution reaction (η = 252 mV@10 mA cm−2), and exhibits excellent stability after being tested for more than 720 hours. More importantly, flexible solid‐state rechargeable Zn‐air batteries directly equipped with the FeNi@NCNTs/CC air‐cathode are demonstrated to exhibit a high discharge voltage (≈1.0 V@2 mA cm−2) and a low charge voltage (≈1.65 V@2 mA cm−2), along with an excellent mechanical and cycling stability (voltage gap increased ≈0.03 V after 200 cycles). The novel designed air‐cathode and simple methodology for flexible solid‐state rechargeable Zn‐air batteries contribute valuable enlightenment toward the development of emerging portable electronics in practice.

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Fe/Ni-N-CNFs electrochemical catalyst for oxygen reduction reaction/oxygen evolution reaction in alkaline media

Cited by 69 publications

References 44 publications

FeNi Alloy Nanoparticles Encapsulated in Carbon Shells Supported on N‐Doped Graphene‐Like Carbon as Efficient and Stable Bifunctional Oxygen Electrocatalysts

FeNi Alloy Nanoparticles Encapsulated in Carbon Shells Supported on N‐Doped Graphene‐Like Carbon as Efficient and Stable Bifunctional Oxygen Electrocatalysts

The behavior of chemical and electrochemical Ag deposition on FeNi‐mesh cathodes in Al‐air battery

Robust and Highly Active FeNi@NCNT Nanowire Arrays as Integrated Air Electrode for Flexible Solid‐State Rechargeable Zn‐Air Batteries

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