<p>The growing demand for sustainable and high-performance sensors has driven the development of hydrogen peroxide (H₂O₂) sensing technologies utilizing innovative material combinations. This study developed cutting-edge H₂O₂ sensors by integrating 3D printing technology and materials like silver nanoparticles, carbon nanotubes, recycled battery powder, and biodegradable polymers such as acrylonitrile butadiene styrene (ABS), polylactic acid (PLA) (5%, 10%), and polyvinyl alcohol (PVA) (5%, 10%). The cyclic voltammetry analysis demonstrated that electrodes with 10% PVA exhibited superior electrocatalytic activity and sensitivity for detecting H₂O₂ compared to PLA-based electrodes. This innovative approach addresses environmental concerns associated with electronic waste, enhancing sensor durability and electrochemical efficiency.</p> Graphical Abstract <p></p>