Floating Platform Geometry as a Frequency‐Selective Mechanism for Triboelectric Wave Energy Harvesting

Ocean wave energy has enormous potential for sustainable power generation but conventional technologies often face challenges in efficiency, durability, and adaptability to specific sites. Triboelectric nanogenerators (TENGs) are able to convert irregular and low frequency water motion into electrical energy, but their performance depends on the mechanical interface that transmits the motion. In this study, we introduce a site‐specific strategy for wave energy harvesting, in which floating platform geometry is selected to enhance TENG activation under the dominant wave conditions of the intended deployment region. To systematically evaluate this effect, three rolling‐ball TENG architectures (planar, concave, and lateral) were integrated into three floating platforms with distinct hull geometries shapes (half‐sphere, half‐cylinder, and trapezoidal prism) and tested under scaled wave conditions representative of the Portuguese coast. The results show that platform geometry strongly influences the mechanical motions acting on the TENGs, selectively enhancing the energy captured from specific wave frequencies without modifying the devices. Among the tested configurations, the lateral TENG achieved the highest outputs, generating approximately 70 V, 62 μA, and 11 μW when integrated into the half‐cylinder platform. These findings reveal that efficient wave energy harvesting depends on the combined effects of platform motion and TENG design, thus pointing to a paradigm shift, where optimization is achieved by adapting floating platforms to local wave dynamics, enabling robust, efficient, and scalable energy generation. This strategy opens new pathways for hybrid and distributed ocean energy systems and supports the practical, site‐specific deployment of TENG based wave energy technologies.