Plastic pollution, particularly the presence of microplastics, poses a significant threat to the environment and human well-being due to its persistence and harmful effects on ecosystems. Efforts to address this dilemma have focused on recycling improvements, biodegradable alternatives, and stricter regulations. However, the challenge of microplastics necessitates innovative solutions. Recent research has explored a novel tandem catalytic process that integrates microplastics degradation with hydrogen production. The process utilizes a FeSA-hCN catalyst that effectively activates hydrogen peroxide to generate hydroxyl radicals, enabling the breakdown of ultra-high molecular-weight polyethylene (UHMWPE) with exceptional efficiency and stability. This system outperforms existing solutions by showcasing high degradation rates and catalyst recyclability. Moreover, it demonstrates applicability in various natural water bodies and degrades a wide range of plastic types, presenting a promising approach to combat plastic pollution. One of the remarkable aspects of this innovative process is its dual benefit – not only does it efficiently break down plastics, but it also converts the degradation products into valuable carboxylic acids, driving a subsequent reaction for hydrogen production. By harnessing recovered catalysts and UHMWPE-derived products, the system achieves a significant hydrogen production rate under light irradiation, offering a practical means to recycle plastics and generate clean energy. The potential implications of this research are transformative, envisioning a future where plastic waste is transformed into a sustainable source of energy, addressing environmental challenges while meeting energy demands. Although still in its early stages, this technology holds immense promise for real-world applications, with ongoing efforts focused on enhancing efficiency, expanding plastic types targeted, and optimizing the process for broader use. Ultimately, this research marks a crucial step towards a cleaner, more sustainable future by tackling plastic pollution and advancing clean energy solutions.