Carbon-based electrodes in polymer electrolyte fuel cells (PEFCs) are prone to corrosion. Therefore, alternative “carbon-free” materials are required. Here, the use of a catalyst-coated porous metal support is proposed as a gas diffusion electrode. As a proof-of-concept, commercially available porous titanium sheets comprising sintered titanium fibers are chemically etched with NaOH, followed by heat treatment. This results in the formation of oxidized titanium nanostructures (such as nanosheets and nanotubes) at the surface. Subsequently, platinum decoration is performed via arc plasma deposition (APD). This porous composite structure is then attached to the membrane, and used as the gas diffusion electrode for PEFC membrane electrode assemblies (MEAs). This concept integrates the catalyst, catalyst support, gas diffusion layer, and current collector in a single structure, cutting down on the number of cell components and reducing total device thickness. The carbon-free nature ...

中文翻译：

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表面改性的钛纤维作为耐用的无碳铂催化剂，可用于聚合物电解质燃料电池

聚合物电解质燃料电池（PEFC）中的碳基电极易于腐蚀。因此，需要替代的“无碳”材料。在此，提出使用涂覆有催化剂的多孔金属载体作为气体扩散电极。作为概念证明，将包含烧结钛纤维的可商购获得的多孔钛片用NaOH化学蚀刻，然后进行热处理。这导致在表面形成氧化的钛纳米结构（例如纳米片和纳米管）。随后，通过电弧等离子体沉积（APD）进行铂装饰。然后，将这种多孔复合结构附着到膜上，并用作PEFC膜电极组件（MEA）的气体扩散电极。这个概念整合了催化剂，催化剂载体，气体扩散层，和集电器采用单一结构，从而减少了电池组件的数量并减小了设备的总厚度。无碳自然...