In Situ Synthesis of Fe−N Co‐doped Porous Carbon Nanospheres by Extended Stöber Method for Oxygen Reduction in Both Alkaline and Acidic Media

Qu, Yongfang; Zhang, Wei; Li, Dahuan; Yang, Hao; Xiao, Yahui; Liu, Yong

doi:10.1002/celc.202101464

ChemElectroChem

2022

DOI: 10.1002/celc.202101464

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In Situ Synthesis of Fe−N Co‐doped Porous Carbon Nanospheres by Extended Stöber Method for Oxygen Reduction in Both Alkaline and Acidic Media

Yongfang Qu

Wei Zhang

Dahuan Li

et al.

Abstract: The replacement of Pt/C catalysts with ironÀ nitrogenÀ carbon (FeÀ NÀ C) nanomaterials in the oxygen reduction reaction (ORR) is appealing for the large-scale application of fuel cells. Herein, an extended Stöber method was used to in situ synthesize FeÀ N co-doped porous carbon spheres (FeÀ NÀ Cs) with large surface areas and impressive ORR performance. FeÀ NÀ Cs were synthesized using 3-aminophenol as N precursor, ferrocenealdehyde (FcÀ CHO) as Fe source and crosslinker, and Pluronic F127 as soft template. A… Show more

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Effect of Carbon Xerogel Activation on Fe−N−C Catalyst Activity in Fuel Cells

Álvarez‐Manuel,

Alegre,

Sebastián

et al. 2023

ChemElectroChem

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Fe−N−C catalysts are an interesting option for polymer electrolyte fuel cells due to their low cost and high activity towards the oxygen reduction reaction (ORR). Since Fe−N−C active sites are preferentially formed in the micropores of the carbon matrix, increasing the microporosity is highly appealing. In this work, carbon xerogels (CXG) were activated by physical and chemical methods to favor the formation of micropores, used as carbon matrices for Fe−N−C catalysts, and investigated for the ORR. The catalysts were characterized by solid‐state techniques to determine chemical composition and pore structure. Physical activation increased microporosity up to 2‐fold leading to catalysts with a larger density of active sites (more than twice iron and nitrogen uptake, pyridinic N and Nx−Fe). This entailed a higher ORR intrinsic activity determined in a 3‐electrode cell (80 mV better half‐wave potential). At the cathode of a fuel cell, the catalysts based on activated carbon materials showed 26 % lower power density ascribed to a more hydrophilic surface, causing a larger extent of flooding of the electrode that counterbalances the higher intrinsic activity. Interestingly, a more stable behavior was observed for the activated catalysts, with up to 2‐fold better relative power density retention after 20‐hour operation.

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Effect of Carbon Xerogel Activation on Fe−N−C Catalyst Activity in Fuel Cells

Álvarez‐Manuel,

Alegre,

Sebastián

et al. 2023

ChemElectroChem

View full text Add to dashboard Cite

show abstract

The preparation of bifunctional Co-N co-doped carbon with bamboo-like hollow tubular as an efficient electrocatalyst for oxygen reduction and methanol oxidation reaction

Zhang

Pu²,

Qu³

et al. 2022

Journal of Electroanalytical Chemistry

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ZIF-8-derived N-doped porous carbon electrodes enabled with in situ embedded ZrO2 nanoparticles for phosphorus removal

Song,

Chen,

Chen

et al. 2024

Journal of Electroanalytical Chemistry

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In Situ Synthesis of Fe−N Co‐doped Porous Carbon Nanospheres by Extended Stöber Method for Oxygen Reduction in Both Alkaline and Acidic Media

Cited by 3 publications

References 69 publications

Effect of Carbon Xerogel Activation on Fe−N−C Catalyst Activity in Fuel Cells

Effect of Carbon Xerogel Activation on Fe−N−C Catalyst Activity in Fuel Cells

The preparation of bifunctional Co-N co-doped carbon with bamboo-like hollow tubular as an efficient electrocatalyst for oxygen reduction and methanol oxidation reaction

ZIF-8-derived N-doped porous carbon electrodes enabled with in situ embedded ZrO2 nanoparticles for phosphorus removal

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