Shiba Shunsuke, Ogata Ayano, Matsushita Shin, Niwa Osamu, Kunitake Masashi, Matsuguchi Masanobu, Komoda Masato, Nishina Yuta
Advanced Materials Research Laboratory, NiSiNa Materials Co. Ltd., 2-6-20-3, Kitagata, Kita-ku, Okayama 700-0803, Japan.
Department of Applied Chemistry, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan.
Langmuir. 2024 Aug 6;40(31):16349-16360. doi: 10.1021/acs.langmuir.4c01567. Epub 2024 Jul 24.
In this study, we present an innovative approach for creating hierarchical meso/nanoporous Pt films using dynamic soft templating. The fabrication process, called dynamic soft templating, involves Pt electrodeposition within a specialized bicontinuous microemulsion (BME) system characterized by a sophisticated three-dimensional network comprising water and oil phases, surfactants, and cosurfactants. Pt electrodeposition exclusively occurs in the water phase of the BME. This results in a porous Pt film exhibiting a nanostructure mirroring the oil solution/water solution nanostructure (solution/solution structure) of the BME, the size of which can be tailored by adjusting the BME composition. Through a simultaneous interplay of Pt electrodeposition and overpotential deposition of hydrogen (H-OPD, dissociative adsorption of water), potential-dependent Pt mesostructures are dynamically shaped. As a result, we achieve diverse morphologies in the form of hierarchical meso/nanoporous Pt films. The potential applications of the films are evaluated as electrocatalysts for the methanol oxidation reaction (MOR), and it was found that the electrocatalytic performances seem to be sensitive to nanoporosity and not relevant to mesoporosity.
在本研究中，我们提出了一种利用动态软模板法制备分级介孔/纳米多孔铂薄膜的创新方法。这种被称为动态软模板法的制备过程，涉及在一种特殊的双连续微乳液（BME）体系中进行铂电沉积，该体系的特征是具有由水相、油相、表面活性剂和助表面活性剂组成的复杂三维网络。铂电沉积仅发生在BME的水相中。这导致形成一种多孔铂薄膜，其纳米结构反映了BME的油溶液/水溶液纳米结构（溶液/溶液结构），其尺寸可通过调整BME组成来定制。通过铂电沉积和氢的过电位沉积（H-OPD，水的解离吸附）的同时相互作用，动态形成了电位依赖的铂介观结构。结果，我们获得了分级介孔/纳米多孔铂薄膜形式的多种形貌。评估了这些薄膜作为甲醇氧化反应（MOR）电催化剂的潜在应用，发现电催化性能似乎对纳米孔隙率敏感，而与介孔率无关。
