Performance comparison of FeNiCo, FeNiCu and FeNiCoCu alloy particles as catalyst material for polymer electrolyte membrane fuel cells

Ates, Semih; Tarı, Doğaç; Safaltın, Şerzat; Küçükelyas, Burak; Özçelik, Duygu Yeşiltepe; Gürmen, Sebahattin

doi:10.1007/s11144-021-02087-5

Reac Kinet Mech Cat

2021

DOI: 10.1007/s11144-021-02087-5

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Performance comparison of FeNiCo, FeNiCu and FeNiCoCu alloy particles as catalyst material for polymer electrolyte membrane fuel cells

Semih Ates

Doğaç Tarı

Şerzat Safaltın

et al.

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Cited by 3 publications

References 25 publications

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High entropy alloy reinforcement for superior electromagnetic interference shielding performance in carbon fiber‐reinforced polymer composites

Küçükelyas,

Kaykılarlı,

Eken

et al. 2024

Polymer Composites

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This study explores the enhancement of electromagnetic interference (EMI) shielding effectiveness (SE) in carbon fiber‐reinforced polymer (CFRP) composites through the integration of equatomic CoCuFeNi high entropy alloy (HEA) particles. Employing mechanical alloying (MA), CoCuFeNi HEA powders were synthesized, revealing a face‐centered cubic structure with crystallite and particle sizes of 14.7 nm and 11.62 μm, respectively. The integration of these HEA particles at concentrations of 5%, 10%, and 15% by weight into epoxy resin, followed by the fabrication of composites using the hand lay‐up technique. Detailed structural analysis of HEA particles confirmed the successful synthesis of equatomic HEAs via MA. Structural analysis of the HEA integrated composites revealed vacancy regions at 5% concentration, a uniform distribution at 10%, and particle agglomeration causing inhomogeneity and vacancies at 15%. The composites demonstrated significant improvements in EMI SE, with the 10% HEA sample showing superior performance compared to the other samples. Specifically, the 10% HEA composite achieved a peak SE of 73.09 dB at 4.72 GHz, attributed to the optimized distribution of HEA particles that enhanced electrical conductivity and reflective properties.Highlights CoCuFeNi HEA particles were successfully synthesized via MA. HEA particles were added to epoxy at 5, 10, and 15 wt% for composite fabrication. Voids were observed in HEA5, uniformity in HEA10, and clustering in HEA15. EMI shielding was assessed using VNA, SE, dielectric permittivity, and magnetic permeability. The HEA10 composite achieved peak EMI shielding, 73.09 dB at 4.72 GHz.

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High entropy alloy reinforcement for superior electromagnetic interference shielding performance in carbon fiber‐reinforced polymer composites

Küçükelyas,

Kaykılarlı,

Eken

et al. 2024

Polymer Composites

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Crystallization insights revealed by simulation solidification study of Fe63Ni33Co4 alloy melt at subcritical cooling rate

Luo

Tian

Zheng

et al. 2022

Journal of Non-Crystalline Solids

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Synthesis, structural and magnetic characterization of spherical high entropy alloy CoCuFeNi particles by hydrogen reduction assisted ultrasonic spray pyrolysis

Küçükelyas

Safaltın

Şam

et al. 2022

International Journal of Materials Research

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The present study focuses on the synthesis, structural and magnetic characterization of CoCuFeNi high entropy alloy particles. The hydrogen reduction assisted ultrasonic spray pyrolysis method was used to synthesize nanocrystalline quaternary CoCuFeNi particles in a single step. The effect of synthesis temperature on the structure, morphology and the size of particles was investigated. The syntheses were performed at 700 °C, 800 °C, and 900 °C with 0.1 M concentration of metal nitrate salts precursor solution. The structure and morphology of products were characterized through X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy and vibrating sample magnetometer studies. Diffraction pattern based calculations revealed that crystallite sizes of CoCuFeNi particles were in the range of 15.6–26.7 nm. Scanning electron microscopy and energy dispersive spectroscopy investigations showed that particles were agglomerated from crystallites and in spherical morphology with equiatomic elemental composition. According to vibrating sample magnetometry results, soft magnetic properties were observed for CoCuFeNi particles. X-ray photoelectron spectroscopy results showed that the surface has a thin layer of copper oxide.

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Performance comparison of FeNiCo, FeNiCu and FeNiCoCu alloy particles as catalyst material for polymer electrolyte membrane fuel cells

Cited by 3 publications

References 25 publications

High entropy alloy reinforcement for superior electromagnetic interference shielding performance in carbon fiber‐reinforced polymer composites

High entropy alloy reinforcement for superior electromagnetic interference shielding performance in carbon fiber‐reinforced polymer composites

Crystallization insights revealed by simulation solidification study of Fe63Ni33Co4 alloy melt at subcritical cooling rate

Synthesis, structural and magnetic characterization of spherical high entropy alloy CoCuFeNi particles by hydrogen reduction assisted ultrasonic spray pyrolysis

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