This technology involves forming an amine-functionalized silicate sol-gel matrix (TPDT) and reduced graphene oxide (RGO) composite layer on an electrode. Prussian Blue nanostructures are then grown directly via electrostatic interaction between ferricyanide and Fe2+ ions, followed by the electrodeposition of platinum nanostructures to produce an RGO-PB/Pt electrocatalyst.
Due to the extremely low solubility product constant of Prussian Blue, synthesis reactions occur too rapidly, making it difficult to control particle morphology and size through conventional electrodeposition or co-precipitation. Furthermore, polycrystalline platinum electrodes used in direct methanol fuel cells face limitations in commercialization due to high costs and CO poisoning.
This technology deposits platinum onto a 3D cage-like porous Prussian Blue structure that bridges graphene sheets. This achieves synergistic methanol oxidation activity and high operational stability by combining a porous support with electron-transfer mediation. It can be applied to direct methanol fuel cell anodes, electrochemical sensors, and various energy conversion devices, enabling the production of catalyst electrodes with improved platinum utilization through a simple process.
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