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在含有C12EO8(Octaethyleneglycol Monododecyl Ether)的H1溶致液晶相中Pt微电极上电沉积Rh介孔膜.该电极在中性、低浓度(CH2O2<10 mmol.L-1)条件下,对H2O2有较好的氧化还原响应及稳定性.由于电流磁滞效应,H2O2在Rh介孔膜微电极上的氧化与电位相关,且遵循与Rh(OH)3有关的CEE(Chemical reaction step by two sequential electrochemical steps)反应机制.H2O2浓度较大时,由于孔电极表面其结合点位趋于饱和或孔内溶液酸化的反应限制,电流呈现一平台.Rh介孔膜厚度小于200 nm的电极,H2O2浓度校正曲线符合膜孔反应一维扩散模型.
The Rh mesoporous membrane was electrodeposited on a Pt microelectrode of H1 phase containing Octanedioxyglycol Monododecyl Ether (H12O2) at a low concentration (CH2O2 <10 mmol.L-1) Better oxidation-reduction response and stability. Due to the current hysteresis effect, the oxidation of H2O2 on the Rh mesoporous membrane microelectrode is related to the potential and follows the CEE (Chemical reaction step by two sequential electrochemical) When the concentration of H2O2 is relatively high, the current presents a plateau due to the saturation of the binding sites on the surface of the electrode or the acidification reaction of the solution in the pores. The electrode with RH mesoporous membrane thickness less than 200 nm and the H2O2 concentration correction The curve conforms to the one-dimensional diffusion model of membrane pore reaction.