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电化学  2012 

H2O2在具有纳米结构的Rh微电极上的电催化氧化

, PP. 457-471

Keywords: H2O2,Rh,微电极,纳米孔,易溶液晶,模板电沉积

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Abstract:

在含有C12EO8(OctaethyleneglycolMonododecylEther)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<10mmol?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(ChemicalReaction-ElectronTransferReaction-ElectronTransferReaction)反应机制.H2O2浓度较大时,孔电极表面其结合点位趋于饱和或在孔内溶液酸化的反应限制,电流可呈现一个平台.Rh介孔膜厚度小于200nm的电极,H2O2浓度校正曲线符合膜孔反应一维扩散模型.

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