Highly dispersed Fe-Nx active sites on Graphitic-N dominated porous carbon for synergetic catalysis of oxygen reduction reaction

Huang, Yanping; Liu, Kang; Kan, Shuting; Liu, Penggao; Hao, Rui; Liu, Weifang; Wu, Yufeng; Liu, Hongtao; Liu, Min; Liu, Kaiyu

doi:10.1016/j.carbon.2020.09.010

Cited by 53 publications

(18 citation statements)

References 41 publications

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“…Environmental degradation and energy crisis have driven the urgent need for renewable energy [1] . In the near future, sustainable solar energy, green hydrogen energy and potential fuel cell technology are expected to replace traditional fossil fuels and avoid the release of carbon dioxide [2] .…”

Section: Introductionmentioning

confidence: 99%

Tuning Overall Water Splitting on an Electrodeposited NiCoFeP Films

Kan

Feng

et al. 2021

ChemElectroChem

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The regulation of geometric and electronic structures is very important to transition metal phosphides with high catalytic properties. Herein, nanofilms consisting of NiCoFeP nanospheres were electrochemically deposited onto 3D Ni foam for the catalysis of water splitting. Depending on the amount of iron, the NiCoFeP nanocatalysts exhibit different surface topographies and chemical binding energies, which have a great influence on electrochemical performances. The optimal NiCoP‐0.01 M Fe films show robust bifunctional electrocatalytic activities with an overpotential of 118 mV (10 mA cm−2) for the hydrogen evolution reaction (HER) and 300 mV (50 mA cm−2) for the oxygen evolution reaction (OER). The overall water splitting employing this proposed nanocatalyst at both electrodes only presents a cell voltage of 1.60 V at the current density of 10 mA cm−2, far lower than that (1.73 V) with the commercial Pt/C cathode and RuO2 anode combination.

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Section: Introductionmentioning

confidence: 99%

Tuning Overall Water Splitting on an Electrodeposited NiCoFeP Films

Kan

Feng

et al. 2021

ChemElectroChem

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“…The electron transfer between the catalyst surface and the reaction or the intermediate species are also facilicated, thereby effectively promoting the reaction kinetics of ORR and OER [46–48] . Moreover, high concentration of graphitic‐N can improve electron transfer of the catalyst as well, which plays an important role in improving the catalytic ORR activity [49] . The core‐level Fe 2p XPS spectrum of Fe−M/G/H could be deconvoluted into four pairs of peaks.…”

Section: Resultsmentioning

confidence: 99%

Fe₃C Decorated N, Fe Co‐Doped Hollow Carbon Microspheres as Efficient Air Electrode Catalyst for Zinc‐Air Battery

Zhang

Sun

et al. 2022

ChemistrySelect

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Efficient metal‐air batteries need active catalysts with low cost for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Herein, hollow spherical Fe−M/G/H catalyst was synthesized through a polycondensation/pyrolysis method without template. Polycondensation of melamine, d‐glucose, and hexamethylenetetramine was accomplished to obtain carbon spheres with high nitrogen content. Hollow microspheres containing Fe‐Nx and Fe3C were fabricated by subsequent pyrolysis with Fe catalysts. Hollow microsphere structures not only expose more active sites (doped‐N, Fe‐Nx, and Fe3C), but also promote the mass transfer of O2. Fe−M/G/H possesses superior ORR performance in alkaline media with high limiting current density (5.09 mA cm−2) and half‐wave potential (0.80 V). The OER activity of Fe−M/G/H is superior to commercial Pt/C. Fe−M/G/H assembled zinc‐air battery exhibits high peak power density (90.27 mW cm−2) and long stability. This research provides a new approach to design hollow carbon catalysts with homo‐dispersed Fe‐Nx/Fe3C active sites and high doped‐N concentration.

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“…According to the number of electron transfers, the HER at the cathode only needs to transfer two electrons while the OER at the anode must transfer four electrons and it needs more energy. 25,26 The reaction process of the OER is more complex than that of the HER; to produce one oxygen molecule, two water molecules, four electrons, and four protons must be involved in the reaction. The development of efficient HER and OER electrocatalysts is an effective means to reduce the operating voltage.…”

Section: Electrocatalytic Oxygen Evolution Reaction (Oer) Mechanismmentioning

confidence: 99%

Research progress in improving the oxygen evolution reaction by adjusting the 3d electronic structure of transition metal catalysts

et al. 2022

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Highly dispersed Fe-Nx active sites on Graphitic-N dominated porous carbon for synergetic catalysis of oxygen reduction reaction

Cited by 53 publications

References 41 publications

Tuning Overall Water Splitting on an Electrodeposited NiCoFeP Films

Tuning Overall Water Splitting on an Electrodeposited NiCoFeP Films

Fe₃C Decorated N, Fe Co‐Doped Hollow Carbon Microspheres as Efficient Air Electrode Catalyst for Zinc‐Air Battery

Research progress in improving the oxygen evolution reaction by adjusting the 3d electronic structure of transition metal catalysts

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Highly dispersed Fe-Nx active sites on Graphitic-N dominated porous carbon for synergetic catalysis of oxygen reduction reaction

Cited by 53 publications

References 41 publications

Tuning Overall Water Splitting on an Electrodeposited NiCoFeP Films

Tuning Overall Water Splitting on an Electrodeposited NiCoFeP Films

Fe3C Decorated N, Fe Co‐Doped Hollow Carbon Microspheres as Efficient Air Electrode Catalyst for Zinc‐Air Battery

Research progress in improving the oxygen evolution reaction by adjusting the 3d electronic structure of transition metal catalysts

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Fe₃C Decorated N, Fe Co‐Doped Hollow Carbon Microspheres as Efficient Air Electrode Catalyst for Zinc‐Air Battery