Abstract
Electrosynthesis of H(2)O(2) through O(2) reduction in seawater provides bright sight on the H(2)O(2) industry, which is a prospective alternative to the intensively constructed anthraquinone process. In this work, a photovoltaic-driven flow cell system is built for the electrosynthesis of H(2)O(2) in simulated seawater using N-doped carbon catalysts. The N-doped carbon catalysts with multiple N-doped carbon defects can achieve a record-high H(2)O(2) production rate of 34.7 mol g(catalyst) (-1) h(-1) under an industrially relevant current density of 500 mA cm(-2) and a long-term stability over 200 h in simulated seawater (0.5 M NaCl). When driven by the photovoltaic system, a H(2)O(2) solution of ∼1.0 wt% in 0.5 M NaCl is also obtained at about 700 mA cm(-2). The obtained solution is applied for disinfection of mouse wounds, with a removal rate of 100% for Escherichia coli and negligible toxicity to living organisms. It provides bright prospects for large-scale on-site H(2)O(2) production and on-demand disinfection.