Mass transport losses (η_mtx) play a significant role at high current densities in polymer electrolyte water electrolyzers (PEWEs). Previous work has shown that η_mtx depends on the porous transport layer (PTL) structure, although a clear correlation between the material morphology and η_mtx has not been established. In this work, we experimentally determine the overpotential η^{H +}_CLa associated with the proton transport in the anodic catalyst layer by measuring the ionic resistance in the catalyst layer using electrochemical impedance spectroscopy (EIS) and the transmission-line model. We found that overpotentials, including η^{H +}_CLa, depend on the PTL morphologic surface properties.

中文翻译：

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通信-聚合物电解质水电解槽中催化剂层质子传输阻力对电压损失的贡献

在高分子电解质水电解槽（PEWE）中，在高电流密度下，传质损失（_ηmtx）发挥着重要作用。先前的工作表明，_ηmtx取决于多孔传输层（PTL）结构，尽管尚未建立材料形态与_ηmtx之间的明确关联。在这项工作中，我们实验确定过电压η ^{ħ +} _CLA通过测量使用电化学阻抗谱（EIS）和传输线模型的催化剂层中的离子电阻与在阳极催化剂层中的质子传输相关联。我们发现过电位，包括η ^{^ h +} _CLA取决于PTL的表面形态。