Luty-Błocho Magdalena, Pach Adrianna, Kutyła Dawid, Kula Anna, Małecki Stanisław, Jeleń Piotr, Hessel Volker
AGH University of Krakow, Faculty of Non-Ferrous Metals, Al. A. Mickiewicza 30, 30-059 Krakow, Poland.
AGH University of Krakow, Faculty of Materials Science and Ceramics, Al. A. Mickiewicza 30, 30-059 Krakow, Poland.
Materials (Basel). 2024 Aug 22;17(16):4165. doi: 10.3390/ma17164165.
The presented research is the seed of a vision for the development of a waste-for-product strategy. Following this concept, various synthetic solutions containing low concentrations of platinum group metals were used to model their recovery and to produce catalysts. This is also the first report that shows the method for synthesis of a pyramid-like structure deposited on activated carbon composed of Pd and Pt. This unique structure was obtained from a mixture of highly diluted aqueous solutions containing both metals and chloride ions. The presence of functional groups on the carbon surface and experimental conditions allowed for: the adsorption of metal complexes, their reduction to metal atoms and enabled further hierarchical growth of the metal layer on the carbon surface. During experiments, spherical palladium and platinum nanoparticles were obtained. The addition of chloride ions to the solution promoted the hierarchical growth and formation of palladium nanopyramids, which were enriched with platinum nanoparticles. The obtained materials were characterized using UV-Vis, Raman, IR spectroscopy, TGA, SEM/EDS, and XRD techniques. Moreover, Pd@ROY, Pt@ROY, and Pd-Pt@ROY were tested as possible electrocatalysts for hydrogen evolution reactions.
所展示的研究是废物转化为产品战略发展愿景的萌芽。遵循这一理念，使用了各种含有低浓度铂族金属的合成溶液来模拟它们的回收并制备催化剂。这也是第一份展示合成由钯和铂组成的沉积在活性炭上的金字塔状结构方法的报告。这种独特结构是由含有两种金属和氯离子的高度稀释水溶液混合物获得的。碳表面官能团的存在以及实验条件使得：金属络合物的吸附、它们还原为金属原子，并使得金属层能够在碳表面进一步分层生长。在实验过程中，获得了球形钯和铂纳米颗粒。向溶液中添加氯离子促进了钯纳米金字塔的分层生长和形成，这些钯纳米金字塔富含铂纳米颗粒。使用紫外可见光谱、拉曼光谱、红外光谱、热重分析、扫描电子显微镜/能谱分析和X射线衍射技术对所得材料进行了表征。此外，对Pd@ROY、Pt@ROY和Pd-Pt@ROY作为析氢反应的可能电催化剂进行了测试。
