High‐Spatial‐Utilization Triboelectric Nanogenerator Enabling Efficient Electrocatalytic Degradation of Marine Organic Pollutants Using a Pd/ZIF‐8@Cu Foam Electrode

ABSTRACT Industrial discharges, containing a variety of recalcitrant organic pollutants such as synthetic dyes, remain a significant source of marine organic pollution, threatening ecosystems and human health. Traditional treatment methods are often constrained by secondary pollution, low efficiency, and reliance on external energy sources. To address these challenges, this study develops a coupled rotary drum and disc triboelectric nanogenerator (CRD‐TENG) and integrates it with a palladium‐loaded zeolitic imidazolate framework‐8 coated copper (Pd/ZIF‐8@Cu) foam electrode to achieve self‐powered electrocatalytic degradation. The TENG maximizes internal space utilization by embedding disc‐shaped TENGs (D‐TENGs) within a rotary drum cavity. It achieves an average power density of 52.88 W m −3 , significantly surpassing most existing TENGs. The system maintains stable over 1 624 000 cycles. The Pd/ZIF‐8@Cu electrode features a highly porous structure with a large specific surface area, facilitating efficient charge transfer and enabling synergistic catalysis between Pd and ZIF‐8. Without power management circuits, the system autonomously degrades 86% of 10 µmol L −1 methylene blue within 300 min, achieving a degradation rate constant of 13.5 times higher than pure copper foam. This study demonstrates a self‐powered, highly efficient approach for degrading dye pollutants in marine environments, overcoming the reliance on an external power supply in traditional marine wastewater treatment.