In heterogeneous electro-Fenton process, the design of electrocatalysts for in-situ generation of H₂O₂ and efficient conversion to •OH remains a challenge. Herein, a simple one-step pyrolysis strategy has been developed to synthesize green and stable dual-functional electro-catalysts from agricultural wastes. The biochar of soybean roots (RSBC) with ample -COOH and C-O-C functional groups exhibited considerable capacity for H₂O₂ production (21.6 mM at −0.4 V vs RHE), and the dual-functional electron-catalyst exhibits an excellent catalytic reaction for antibiotics removal (100 % cloroquine phosphate with k_obs=0.035 min⁻¹). The ultra-small MnO nanoclusters (<2 nm) in the biochar of Phytolacca americana leaves (LPBC) were the active center via the transfer of electrons between adsorbed H₂O₂ and Mn atoms to produce reactive •OH, as identified by operando X-ray absorption fine structure (XAFS) spectroscopy and density functional theory calculations. This work provides a new direction in the design of dual-functional carbon cathode catalysts for environmental remediation.

在非均相电芬顿过程中，原位产生H ₂ O ₂并有效转化为•OH的电催化剂设计仍然是一个挑战。在此，开发了一种简单的一步热解策略，从农业废物中合成绿色且稳定的双功能电催化剂。具有丰富的-COOH和COC官能团的大豆根生物炭（RSBC）表现出相当大的H ₂ O ₂生产能力（-0.4 V vs RHE时为21.6 mM），并且双功能电子催化剂表现出优异的催化反应抗生素去除（100% 磷酸氯喹，k _obs =0.035 min ⁻¹）。美洲商陆叶 (LPBC)生物炭中的超小 MnO 纳米团簇 (<2 nm)是活性中心，通过吸附的 H ₂ O ₂和 Mn 原子之间的电子转移产生反应性·OH，如操作X所示-射线吸收精细结构（XAFS）光谱和密度泛函理论计算。这项工作为环境修复双功能碳阴极催化剂的设计提供了新的方向。