Hydrogen peroxide (H₂O${}_2)$ is an important chemical with wide fields of applications in the chemical industry, medicine and environmental protection. The preparation of H₂O₂ by the oxygen reduction reaction (ORR) via the two-electron pathway has the advantages of simple operation and environmental friendliness. Nevertheless, the kinetics of ORR is relatively slow, and the energy efficiency of electrochemical synthesis of H₂O₂ is seriously limited by the competitive four-electron pathway. Therefore, the electrosynthesis of H₂O₂ requires an electrocatalyst with both high catalytic activity and selectivity. In this study, Cu nanoparticles supported on carbon composites (Cu/C) were proposed and had been applied as the catalysts for the electrochemical synthesis of H₂O₂. Taking advantage of the cross-linking reaction between sodium alginate (SA) and metal ions, Cu nanoparticles were directly supported on carbon materials. The porous structure of carbon materials and the introduction of Cu improved the H₂O₂ selectivity of the catalysts. In O₂-saturated 0.1$$M KOH, the optimized catalyst exhibited good activity with a selectivity of 88–90% in the potential range of 0.2–0.6$$V for the electrosynthesis of H₂O₂, and the selectivity remained 70% after 6$$h of operation.

过氧化氢（H ₂ O${}_2）$是一种重要的化学品，在化工、医药、环保等领域有着广泛的应用。双电子途径氧还原反应(ORR)制备H ₂ O _{2具有操作简单、环境友好的优点。}然而，ORR的动力学相对较慢，电化学合成H ₂ O ₂的能量效率受到竞争性四电子途径的严重限制。因此，电合成H ₂ O ₂需要具有高催化活性和选择性的电催化剂。_{在这项研究中，提出了负载在碳复合材料（Cu/C）上的Cu纳米粒子，并将其用作电化学合成H 2} O ₂的催化剂。利用海藻酸钠（SA）与金属离子之间的交联反应，将铜纳米粒子直接负载在碳材料上。碳材料的多孔结构和Cu的引入提高了催化剂的H ₂ O _{2选择性。O 2}饱和中0.1$$M KOH，优化后的催化剂表现出良好的活性，在0.2-0.6电位范围内选择性为88-90%$$V用于电合成H ₂ O ₂，​​6次后选择性仍保持70%$$操作小时。