A novel self-breathing gas diffusion electrode was developed by incorporating carbon nanotubes (CNTs) and carbon black (CB) onto graphite felt, enhancing oxygen mass transfer and catalytic performance for hydrogen peroxide (H2O2) synthesis. Operating at 12 mA/cm2 and pH 3, the electrode achieved 4,691 mg/L H2O2 in 1 hour with exceptional energy efficiency, surpassing conventional electrodes. The study revealed insights into the 2e- ORR mechanism, emphasizing pH regulation and proton transport optimization. The electrode also demonstrated stability, maintaining high H2O2 yields and efficient degradation of contaminants within 30 minutes. This innovative electrode shows promise for efficient H2O2 synthesis and environmental remediation applications, offering a sustainable alternative to traditional production methods.