Sulfonated polystyrene-co-acrylic acid membranes modified by transmembrane reduction of platinum

BACKGROUND Proton exchange membranes (PEMs) could prompt proton transport with long‐term oxidative and hydrolytic durability with little methanol crossover under humidified conditions. Cellulose triacetate (CTA)‐based PEMs were fabricated by reinforcing with 4 wt.% of polyacrylic acid (PAA) and polymerized triazole (PTZA) combination of acrylic acid/triazole acrylate copolymer. RESULTS The presence of PAA and PTZA copolymer in the CTA membrane was confirmed using Fourier transform infrared spectroscopy and X‐ray diffraction. The variations of proton conductivity, methanol crossover and water uptake of the PTZA copolymer‐reinforced CTA matrix were evaluated. Higher proton conductivity of 2.313 × 10−4 S cm−1 and minimal methanol permeability of 1.773 × 10−7 cm2 s−1 were obtained for the CTA/PTZA–20 membrane compared to a pristine CTA membrane. Furthermore, the oxidative tolerability was about 99.6% for CTA/PAA membrane, and hydrolytic stability was 97.78% for the CTA/PTZA–20 membrane, higher than that of the pristine CTA membrane. CONCLUSIONS The increase in proton conduction compared to pristine CTA membrane could be attributed to the presence of triazole moiety, which acts as a proton facilitator in the conduction process. Additionally, an increase in hydrolytic stability, oxidative tolerability and lower methanol crossover results indicated that the PTZA copolymer‐reinforced CTA PEMs have potential for use in fuel cell applications. © 2021 Society of Chemical Industry (SCI).

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“…Moreover, membrane has been formed in the range of 40 to 65 μm thickness. The variation in thickness is due to more TZA monomer 48 …”

Section: Resultsmentioning

confidence: 99%

Composite proton exchange membrane of cellulose triacetate polymer integrated with polyacrylic acid and triazole based copolymer for balanced proton conduction and methanol permeability

Deepa

Sasikumar

Elakkiya

et al. 2021

J of Chemical Tech & Biotech

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“…Accordingly, numerous studies have focused extensively on developing nano-catalyzed membranes for PEMFCs. Melo et al [21] investigated the potential of fabricating MEAs with optimal Pt usage by leveraging the Takenata-Torikai technique. On the other hand, the NEIR approach, which is employed in the current work, is a versatile method in materials science, offering several key advantages.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, their overall performances have fallen short of expectations. Based on a detailed study [15][16][17][18][19][20][21][22][23][24][25][26][27][28], Pt-Co is considered as one of the most promising Pt alloy catalysts over the other binary alloys because of its excellent stability and substantial ORR electro-catalytic activity. Alloying Pt with Co also results in relatively smaller electro-deposited catalyst particles, which means there is an increased electroactive surface area.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Pt-Co Nano-Catalyzed Membranes for Polymer Electrolyte Membrane Fuel Cell Applications

Pethaiah,

Jayakumar,

Palanichamy

2023

Energies

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The membrane electrode assembly (MEA) encompassing the polymer electrolyte membrane (PEM) and catalyst layers are the key components in Polymer Electrolyte Membrane Fuel Cells (PEMFCs). The cost of the PEMFC stacks has been limiting its commercialization due to the inflated price of conventional platinum (Pt)-based catalysts. As a consequence, the authors of this paper focus on developing novel bi-metallic (Pt-Co) nano-alloy-catalyzed MEAs using the non-equilibrium impregnation–reduction (NEIR) approach with an aim to reduce the Pt content, and hence, the cost. Herein, the MEAs are fabricated on a Nafion® membrane with a 0.4 mgPtcm−2 Pt:Co electrocatalyst loading at three atomic ratios, viz., 90:10, 70:30, and 50:50. The High Resolution-Scanning Electron Microscopic (HR-SEM) characterization of the MEAs show a favorable surface morphology with a uniform distribution of Pt-Co alloy particles with an average size of about 15–25 µm. Under standard fuel cell test conditions, an MEA with a 50:50 atomic ratio of Pt:Co exhibited a peak power density of 0.879 Wcm−2 for H2/O2 and 0.727 Wcm−2 for H2/air systems. The X-ray diffractometry (XRD), SEM, EDX, Cyclic Voltammetry (CV), impedance, and polarization studies validate that Pt:Co can be a potential affordable alternative to high-cost Pt. Additionally, a high degree of stability in the fuel cell performance was also demonstrated with Pt50:Co50.

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Styrene-assisted acrylic acid grafting onto polypropylene surfaces: preparation, characterization, and an automatically latex-coagulating application

et al. 2022

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Sulfonated polystyrene-co-acrylic acid membranes modified by transmembrane reduction of platinum

Cited by 4 publications

References 37 publications

Composite proton exchange membrane of cellulose triacetate polymer integrated with polyacrylic acid and triazole based copolymer for balanced proton conduction and methanol permeability

Composite proton exchange membrane of cellulose triacetate polymer integrated with polyacrylic acid and triazole based copolymer for balanced proton conduction and methanol permeability

Evaluation of Pt-Co Nano-Catalyzed Membranes for Polymer Electrolyte Membrane Fuel Cell Applications

Styrene-assisted acrylic acid grafting onto polypropylene surfaces: preparation, characterization, and an automatically latex-coagulating application

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