Journal
POLYMER DEGRADATION AND STABILITY
Volume 215, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2023.110460
Keywords
Methanol electrolyser; Crystallinity; Degradation; Mechanism; Recycling
Categories
Ask authors/readers for more resources
Methanol-based electrolysis is a potential alternative for reducing energy consumption. Developing durable methanol-based electrolysers with low CO2 release can lead to cheaper hydrogen production. Recycling precious components is essential to achieve a circular economy in the hydrogen industry.
Methanol-based electrolysis can be a prospective alternative for the reduction of energy consumption. Developing highly durable methanol-based electrolysers with small CO2 release can help achieve cheaper hydrogen. Further, to arrive at a circular economy in H-2, recycling the precious components would play a major role. Several studies on catalyst recycling have overshadowed the need for recycling the proton exchange membrane. Membrane, which forms 25% of the device cost, need to be studied for its degradation and optimizing the operating parameters of the device have a big role to play in establishing recycling. Our previous studies concluded that the change in crystallinity of membrane from fuel cell was closely related to membrane properties. Herein, for the first time, we have correlated the crystallinity of the membrane retrieved from an electrochemical methanol-reformer to its degradation mechanism. The average crystallinity on the anode and cathode sides was observed to be increased drastically compared to a fuel cell. As observed from Fourier Transform Infrared Spectroscopy (FTIR), the presence of sulfonic acid anhydrides was considered one of the reasons for this increase in crystallinity. X-ray photoelectron spectroscopy (XPS) showed that carbon peaks in the side chain was devoid of alpha-OCF2, -CF3, indicating severe degradation. The probability of finding a degraded area on the anode side of the scanned recycled membrane was 88% and 55% for the cathode side. The severe degradation of amorphous side chains and formation of short chains had considerably increased the crystallinity. The disparity in the intensity of degradation on the anode and cathode sides of the membrane was confirmed by the percentage of crystallinity and XPS studies. Further, the severity of degradation on either side of the membrane from methanol-based Proton Exchange Membrane electrolysers makes them difficult for further reuse in hydrogen-based energy systems.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available