Ahmed F. Elerian | Al-Azhar University (original) (raw)

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Papers by Ahmed F. Elerian

Research paper thumbnail of Development of novel proton exchange membranes based on cross-linked polyvinyl alcohol (PVA)/5-sulfosalicylic acid (SSCA) for fuel cell applications

Discover Applied Sciences, 2024

The proton-conducting and methanol permeation behaviors of polymeric electrolyte membranes (PEMs)... more The proton-conducting and methanol permeation behaviors of polymeric electrolyte membranes (PEMs), as well as the expensive nature of direct methanol fuel cell (DMFC) components, pose major concerns in DMFC performance and commercialization. As a result, this research aimed to develop low-cost polyelectrolyte membranes based on cross-linked poly(vinyl alcohol)/5-sulfosalicylic acid dehydrate (PVA/SSCA) composite. Chemical cross-linkers and modifiers offer the essential chemical and mechanical stability of the developed membranes for usage as polyelectrolyte membranes (PEMs). The manufactured composite proton exchange membranes provide several benefits, including significant thermal, chemical, and mechanical stability. The results revealed that extending the SSCA molar concentration increased IEC outcomes of the synthesized membranes, reaching an elevated level of (3.31 meq g −1) compared to (0.91 meq g −1) for the Nafion 117 membrane. The proton conductivity of a composite membrane (102 μm thick) measured by impedance spectroscopy was relatively (0.078 S cm −1) and found comparable to other PVA-based composite membranes reported in the literature. Other key parameters, such as methanol permeability, were measured for constructed composite proton exchange membranes (2.52 × 10-7 cm 2 s −1), which were much lower than Nafion 117 (3.39 × 10-6 cm 2 s −1). The Fourier transform infrared (FT-IR), Raman scattering spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) spectroscopy, elemental analysis, and thermal gravimetric analysis (TGA) were among the techniques used to characterize the synthesized membranes. These characterizations confirm the structural interaction between the membrane components' crystalline nature, and no signs of phase separation or cracks were found; surface morphology and good membrane homogeneity, elemental analysis, and the membranes' thermal stability (up to 290 °C). The membranes were also mechanically characterized using a universal testing machine (UTM), which revealed good mechanical stability. The findings demonstrate that a low-cost proton exchange membrane could potentially be synthesized for DMFC applications.

Research paper thumbnail of Development of polymer electrolyte membrane based on poly(Vinyl Chloride)/graphene oxide modified with zirconium phosphate for fuel cell applications

Journal of Polymer Research, Dec 2, 2022

The function of a membrane in the fuel cell is critical to its success. The major component of a ... more The function of a membrane in the fuel cell is critical to its success. The major component of a direct methanol fuel cell (DMFC) is the proton exchange membrane (PEM) which must have proton conductivity, thermal stability, mechanical qualities, and low methanol permeability. In this study case, the film-forming and structural properties of Polyvinyl chloride (PVC) impelled us to employ them for developing polyelectrolyte membranes (PEMs). To functionalize the resultant PEMs, Graphene oxide (GO) and zirconium phosphate (ZrP) were incorporated into polyvinyl chloride in different proportions. The structural and physical properties of PVC/GO-ZrP membranes were investigated by using a variety of techniques instance, Fourier transform infrared spectroscopy (FTIR), Scanning electron microscope (SEM), Transmission electron microscope (TEM), Thermogravimetric analyzer (TGA), universal testing machine, and water contact angle meter. Furthermore, water uptake, Methanol uptake, and ion exchange capacity (IEC) were measured. The results demonstrated that the membranes developed have enough characteristics to be valid in DMFCs.

Research paper thumbnail of Zirconium Phosphate Based Polyvinyl Chloride to Use as Proton Conducting Membrane for Direct Methanol Fuel Cell (DMFC) Application

Al-Azhar Bulletin of Science, 2017

Proton conducting membrane (PVC/ZrP) based on polyvinyl chloride (PVC) supported with zirconium p... more Proton conducting membrane (PVC/ZrP) based on polyvinyl chloride (PVC) supported with zirconium phosphate (ZrP) ion-exchanger was synthesized for potential applications in Direct methanol fuel cells (DMFCs) by filling the pores of a PVC membranes with in-situ grown ZrP particles. Thermal stability (TGA), Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), mechanical strength, Water uptake, methanol uptake, ion exchange capacity and methanol cross-over of the prepared PVC/ZrP membranes will be studied.

Research paper thumbnail of Development of polymer electrolyte membrane based on poly(Vinyl Chloride)/graphene oxide modified with zirconium phosphate for fuel cell applications

Journal of Polymer Research, 2023

The function of a membrane in the fuel cell is critical to its success. The major component of a ... more The function of a membrane in the fuel cell is critical to its success. The major component of a direct methanol fuel cell
(DMFC) is the proton exchange membrane (PEM) which must have proton conductivity, thermal stability, mechanical
qualities, and low methanol permeability. In this study case, the film-forming and structural properties of Polyvinyl chloride
(PVC) impelled us to employ them for developing polyelectrolyte membranes (PEMs). To functionalize the resultant PEMs,
Graphene oxide (GO) and zirconium phosphate (ZrP) were incorporated into polyvinyl chloride in different proportions. The
structural and physical properties of PVC/GO-ZrP membranes were investigated by using a variety of techniques instance,
Fourier transform infrared spectroscopy (FTIR), Scanning electron microscope (SEM), Transmission electron microscope
(TEM), Thermogravimetric analyzer (TGA), universal testing machine, and water contact angle meter. Furthermore, water
uptake, Methanol uptake, and ion exchange capacity (IEC) were measured. The results demonstrated that the membranes
developed have enough characteristics to be valid in DMFCs.

Research paper thumbnail of Development of novel proton exchange membranes based on cross-linked polyvinyl alcohol (PVA)/5-sulfosalicylic acid (SSCA) for fuel cell applications

Discover Applied Sciences, 2024

The proton-conducting and methanol permeation behaviors of polymeric electrolyte membranes (PEMs)... more The proton-conducting and methanol permeation behaviors of polymeric electrolyte membranes (PEMs), as well as the expensive nature of direct methanol fuel cell (DMFC) components, pose major concerns in DMFC performance and commercialization. As a result, this research aimed to develop low-cost polyelectrolyte membranes based on cross-linked poly(vinyl alcohol)/5-sulfosalicylic acid dehydrate (PVA/SSCA) composite. Chemical cross-linkers and modifiers offer the essential chemical and mechanical stability of the developed membranes for usage as polyelectrolyte membranes (PEMs). The manufactured composite proton exchange membranes provide several benefits, including significant thermal, chemical, and mechanical stability. The results revealed that extending the SSCA molar concentration increased IEC outcomes of the synthesized membranes, reaching an elevated level of (3.31 meq g −1) compared to (0.91 meq g −1) for the Nafion 117 membrane. The proton conductivity of a composite membrane (102 μm thick) measured by impedance spectroscopy was relatively (0.078 S cm −1) and found comparable to other PVA-based composite membranes reported in the literature. Other key parameters, such as methanol permeability, were measured for constructed composite proton exchange membranes (2.52 × 10-7 cm 2 s −1), which were much lower than Nafion 117 (3.39 × 10-6 cm 2 s −1). The Fourier transform infrared (FT-IR), Raman scattering spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) spectroscopy, elemental analysis, and thermal gravimetric analysis (TGA) were among the techniques used to characterize the synthesized membranes. These characterizations confirm the structural interaction between the membrane components' crystalline nature, and no signs of phase separation or cracks were found; surface morphology and good membrane homogeneity, elemental analysis, and the membranes' thermal stability (up to 290 °C). The membranes were also mechanically characterized using a universal testing machine (UTM), which revealed good mechanical stability. The findings demonstrate that a low-cost proton exchange membrane could potentially be synthesized for DMFC applications.

Research paper thumbnail of Development of polymer electrolyte membrane based on poly(Vinyl Chloride)/graphene oxide modified with zirconium phosphate for fuel cell applications

Journal of Polymer Research, Dec 2, 2022

The function of a membrane in the fuel cell is critical to its success. The major component of a ... more The function of a membrane in the fuel cell is critical to its success. The major component of a direct methanol fuel cell (DMFC) is the proton exchange membrane (PEM) which must have proton conductivity, thermal stability, mechanical qualities, and low methanol permeability. In this study case, the film-forming and structural properties of Polyvinyl chloride (PVC) impelled us to employ them for developing polyelectrolyte membranes (PEMs). To functionalize the resultant PEMs, Graphene oxide (GO) and zirconium phosphate (ZrP) were incorporated into polyvinyl chloride in different proportions. The structural and physical properties of PVC/GO-ZrP membranes were investigated by using a variety of techniques instance, Fourier transform infrared spectroscopy (FTIR), Scanning electron microscope (SEM), Transmission electron microscope (TEM), Thermogravimetric analyzer (TGA), universal testing machine, and water contact angle meter. Furthermore, water uptake, Methanol uptake, and ion exchange capacity (IEC) were measured. The results demonstrated that the membranes developed have enough characteristics to be valid in DMFCs.

Research paper thumbnail of Zirconium Phosphate Based Polyvinyl Chloride to Use as Proton Conducting Membrane for Direct Methanol Fuel Cell (DMFC) Application

Al-Azhar Bulletin of Science, 2017

Proton conducting membrane (PVC/ZrP) based on polyvinyl chloride (PVC) supported with zirconium p... more Proton conducting membrane (PVC/ZrP) based on polyvinyl chloride (PVC) supported with zirconium phosphate (ZrP) ion-exchanger was synthesized for potential applications in Direct methanol fuel cells (DMFCs) by filling the pores of a PVC membranes with in-situ grown ZrP particles. Thermal stability (TGA), Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), mechanical strength, Water uptake, methanol uptake, ion exchange capacity and methanol cross-over of the prepared PVC/ZrP membranes will be studied.

Research paper thumbnail of Development of polymer electrolyte membrane based on poly(Vinyl Chloride)/graphene oxide modified with zirconium phosphate for fuel cell applications

Journal of Polymer Research, 2023

The function of a membrane in the fuel cell is critical to its success. The major component of a ... more The function of a membrane in the fuel cell is critical to its success. The major component of a direct methanol fuel cell
(DMFC) is the proton exchange membrane (PEM) which must have proton conductivity, thermal stability, mechanical
qualities, and low methanol permeability. In this study case, the film-forming and structural properties of Polyvinyl chloride
(PVC) impelled us to employ them for developing polyelectrolyte membranes (PEMs). To functionalize the resultant PEMs,
Graphene oxide (GO) and zirconium phosphate (ZrP) were incorporated into polyvinyl chloride in different proportions. The
structural and physical properties of PVC/GO-ZrP membranes were investigated by using a variety of techniques instance,
Fourier transform infrared spectroscopy (FTIR), Scanning electron microscope (SEM), Transmission electron microscope
(TEM), Thermogravimetric analyzer (TGA), universal testing machine, and water contact angle meter. Furthermore, water
uptake, Methanol uptake, and ion exchange capacity (IEC) were measured. The results demonstrated that the membranes
developed have enough characteristics to be valid in DMFCs.