Triphasic microporous materials (containing solid, liquid, and gas) are of interest in electrocatalysis. In this exploratory study, a polymer of intrinsic microporosity (PIM-EA-TB) is impregnated with PdCl₄^2 − metal precursor and vacuum‑carbonised to give an electrically conductive microporous heterocarbon with embedded Pd nanoparticles of typically 10–30 nm diameter. This microporous composite catalyst is formed (via spin-coating) as “flakes” of typically 100 nm thickness and 1 to 20 μm diameter that are readily re-deposited onto glassy carbon electrode substrates. Due to the triphasic conditions, [email protected] electrocatalytic reactivity is high but only for gases (H₂ oxidation or O₂ reduction). This selectivity is observed even in the presence of excess formic acid fuel in the aqueous/liquid phase. The potential for application in membrane-less micro-fuel cells is discussed.

三相微孔材料（包含固体，液体和气体）在电催化中令人关注。在这项探索性研究中，将固有微孔性聚合物（PIM-EA-TB）浸入PdCl ₄ ^2-金属前驱体并真空碳化，得到具有埋入直径通常为10-30 nm的Pd纳米粒子的导电微孔杂碳。这种微孔复合催化剂（通过旋涂）形成为厚度通常为100 nm，直径为1至20μm的“薄片”，这些薄片容易重新沉积在玻璃碳电极基板上。由于三相条件，[受电子邮件保护的]电催化反应性很高，但仅对气体（H ₂氧化或O ₂减少）。即使在水/液相中存在过量的甲酸燃料的情况下，也观察到这种选择性。讨论了在无膜微燃料电池中的应用潜力。