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An optimum stability between efficiency and Pt loading is critically vital for the commercialization of proton alternate membrane (PEM) gas cells. This analysis goals to research the interlink amongst Pt loading, reactive transport, and efficiency. A sophisticated pore-scale mannequin is developed to explain the coupled reactive transport within the catalyst layer (CL) with the reactant gasoline, protons, and electrons all thought of. The CL microstructure is stochastically reconstructed as a computational area, and the physicochemical phenomena inside CLs are resolved by a multi-component lattice Boltzmann (LB) mannequin. The outcomes present that the digital potential drop will not be delicate to Pt loading, whereas the ionic potential drop is far larger. The distributions of native overpotential and the response price are related with peak values close to the membrane, indicating the significance of proton conduction. A excessive Pt loading may lower the native transport loss for a shorter path to catalyst websites, however will increase the general transport resistance for a thicker construction. Though a bigger electrochemical floor space (ECSA) is supplied below a excessive Pt loading, a low Pt loading (0.1 mg cm−2) is usually recommended for prime present situations (2 A cm−2) the place the transport loss is the primary issue proscribing the efficiency.
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