Phosphorus‐Doped Biomass‐Derived Porous Carbon: An Efficient Electrocatalyst for H 2 O 2 Production Over a Wide pH Range

ABSTRACT The synthesis of hydrogen peroxide (H 2 O 2 ) via a two‐electron oxygen reduction reaction (2e − ORR) is a promising alternative to the current anthraquinone production process. However, developing low‐cost and efficient electrocatalysts with diverse pH adaptability remains a substantial challenge. Herein, phosphorus‐doped biomass‐derived porous carbon (P‐BC) was successfully prepared using bagasse as raw material, with sodium phytate serving as both the phosphorus source and pore‐forming agent. The obtained P 1.0 ‐BC exhibits excellent 2e − ORR performance over a wide pH range (3–14). In alkaline media, a remarkable H 2 O 2 yield of 7.05 mol g cat − 1 h − 1 (at 0.2 V vs. RHE) and Faradaic efficiency up to 99% (at 0.6 V vs . RHE) can be obtained. Furthermore, P 1.0 ‐BC maintains satisfactory performance and stability under mildly acidic and neutral conditions. Moreover, the H 2 O 2 on‐site produced by P 1.0 ‐BC at different pH conditions is effectively employed for dye degradation (acidic), disinfection (neutral), and pulp bleaching (alkaline). This work presents a convenient approach to the conversion of low‐cost biomass into high‐value‐added materials, expanding the prospects for decentralized H 2 O 2 production in multiple fields.