电催化合成酸性过氧化氢的研究

在燃料电池型反应器中,以基于BP2000/PTFE材料制备的气体扩散电极作为阴极电极,以循环流动的硫酸溶液作为电解液,进行电化学合成过氧化氢的研究。探讨了电催化氧还原反应制备过氧化氢的反应过程及机理,同时分析了不同催化剂、电解液p H及电解电压对电解效果的影响。结果表明较优的电解条件是:阴极催化剂采用BP2000的担载量为2 mg/cm2,外加电压为1.5 V。在0.5 mol/L H2SO4溶液中生成过氧化氢的电流效率可达70%,过氧化氢浓度达到1.38mol/L(质量分数约为4.7%)。

Study on synthesis of H2O2 acid solution by electrocatalysis

With circular-flow H2SO4 solution as the electrolyte and gas diffusion electrode prepared with BP2000/PTFE as the cathode electrode,the reaction mechanism of hydrogen peroxide production through fuel-cell reactor was studied.The effect of different catalysts,pH and electrolytic voltage on hydrogen peroxide yield was investigated.The results show that the optimum conditions of electrolysis are with BP2000 loading of 2 mg/cm2 as cathode catalyst and the electrolytic voltage of 1.5 V.Current efficiency of hydrogen peroxide production was up to 70％ in 0.5 mol/L H2SO4 solution,and the concentration of H2O2 was up to 1.38 mol/L (about 4.7％).