Proton trade film power modules (PEMFCs) hold a guarantee as a substitution for fossil-powered motors in hard-core vehicles. Lessening the platinum content in impetuses is urgent for such applications. However, the corruption examples of low platinum content impetuses remain inadequately comprehended. A group of researchers led tests to reveal insight into the corruption instruments related to changing impetus content, offering important bits of knowledge.
Their work is distributed in the journal Modern Science and Materials.
In the field of rock-solid vehicles, the PEMFC is an innovation that will make it conceivable to supplant the utilization of non-renewable energy sources. Be that as it may, there is an impediment to the improvement of this innovation: the utilization of platinum as an impetus. Platinum is an uncommon and expensive metal, obstructing the commercialization of this innovation, so it is important to decrease the amount utilized in the PEMFC terminals.
Four unique platinum loadings (0.05 up to 0.3 mg/cm2) of the cathode impetus layer were utilized to concentrate on the solidity of PEMFC anode film gatherings. This review relied on a variety of stressor-sped-up pressure tests focusing on the film and the cathodes.
It was partitioned into two sections: first, the investigation of the film terminals congregations strength using a portioned cell during a sped-up pressure test; then, at that point, the physicochemical portrayals of the mature materials: transmission electron microscopy (TEM), brushing frequency X-beam diffraction (GIXRD); cross-segment checking electron microscopy (SEM); and Raman spectroscopy.
As far as beginning execution, low-Pt stacking (≤ 0.1 mgPt cm-2) cathodes show lower oxygen decrease movement than “regular stacking MEAs” (≥ 0.2 mgPt cm-2), being upset by their low Pt content in the low current thickness (enactment) area and unfriendly oxygen and proton transport obstruction in the high current thickness (mass-transport) district.
Nonetheless, it worked out that the systems of Pt/C debasement are not relying upon the cathode Pt stacking for the picked AST; however, the underlying corruptions are quicker for the most minimal cathode Pt loadings, an apparent downside with regards to the designated lifetime.
The subsequent stage of this work is obviously to (I) moderate the huge mass-transport constraints that frustrate low-stacked PEMFC cathodes and (ii) upgrade their strength.
More information: Ricardo Sgarbi et al, Does the platinum loading in proton-exchange membrane fuel cell cathodes influence the durability of the membrane-electrode assembly?, Industrial Chemistry & Materials (2023). DOI: 10.1039/D3IM00059A
