电合成
电解
电解质
阴极
电化学
Nafion公司
化学
聚合物
无机化学
电解水
活性炭
表面改性
电解槽
材料科学
化学工程
电极
有机化学
物理化学
吸附
工程类
作者
Toru Murayama,Ichiro Yamanaka
摘要
An improved solid-polymer-electrolyte (SPE) electrolysis method was applied for direct electrosynthesis of neutral H2O2 solution from O2 and water. The exposure of a cathode prepared from activated carbon (AC), vapor-grown carbon fiber (VGCF), and polytetrafluoroethylene (PTFE) in the O2 stream was essential for the electrosynthesis of the neutral H2O2 solution (Exp-SPE method). The oxidation treatment of the AC surface and the modification of the cathode using a Nafion solution enhanced the electrochemical activity of the cathode for the neutral H2O2 formation. The active site of the reduction of O2 was characterized using TPD-Mass and FT-IR techniques; then, the concentration of phenol groups on the AC surface corresponded to the H2O2 formation. The reaction mechanism was proposed that O2 electrochemically reduced to HO2• at the active site of the phenol groups on the AC and in which HO2• immediately reduced to H2O2 or disproportioned to H2O2 on the VGCF surface.
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