Porous platinum is a frequently used catalyst material in electrosynthesis and a robust broadband absorber in thermoelectrics. Pore size distribution and localization determine its properties by a large extent. However, the pore formation mechanism during the growth of the material remains unclear. In this work we elucidate the mechanism underlying electrochemical growth of nanoporous platinum layers and its control by ionic concentration and current density during electrolysis. The electrode kinetics and reduction steps of PtCl₄ on platinum electrodes are investigated by cyclic voltammetry and impedance measurements. Cyclic voltammograms show three reduction steps: two steps relate to the platinum cation reduction, and one step relates to the hydrogen reduction. Hydrogen is not involved in the reduction of PtCl₄, however it enables the formation of nanopores in the layers. These findings contribute to the understanding of electrochemical growth of nanoporous platinum layers in isopropanol with thickness of 100 nm to 500 nm.

多孔铂是电合成中常用的催化剂材料，也是热电学中稳健的宽带吸收剂。孔径分布和定位在很大程度上决定了它的性质。然而，材料生长过程中的孔隙形成机制仍不清楚。在这项工作中，我们阐明了纳米多孔铂层电化学生长的潜在机制及其在电解过程中受离子浓度和电流密度的控制。_{PtCl 4}的电极动力学和还原步骤通过循环伏安法和阻抗测量研究铂电极上的。循环伏安图显示三个还原步骤：两个步骤与铂阳离子还原有关，一个步骤与氢还原有关。氢不参与 PtCl ₄的还原，但是它能够在层中形成纳米孔。这些发现有助于理解厚度为 100 nm 至 500 nm 的纳米多孔铂层在异丙醇中的电化学生长。