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用电化学质谱(EMS)和动力学模型分析等方法研究了次亚磷酸根在镍电极上的电化学氧化机理和动力学.研究表明,次亚磷酸根的电化学氧化是通过从P-H键脱离一个原子H,形成磷中心自由基(PHO-●2),而磷中心自由基(PHO-●2)进一步进行电化学反应形成最终产物亚磷酸。利用该模型,推导出相关动力学方程并通过与实验数据拟合获得动力学参数.结果表明,该模型能很好地模拟次亚磷酸根在镍电极上的电化学氧化过程.
The mechanism and kinetics of electrochemical oxidation of hypophosphite on a nickel electrode were investigated by means of electrochemical and mass spectrometry (EMS) and kinetic model analysis. The results showed that the electrochemical oxidation of hypophosphite was achieved through the separation from the PH bond One atom, H, forms the phosphorus center radical (PHO - 2), while the phosphorus center radical (PHO - 2) undergoes further electrochemical reactions to form the final product, phosphorous acid. Using this model, the kinetic equations were deduced and the kinetic parameters were obtained by fitting with the experimental data. The results show that this model can well simulate the electrochemical oxidation of hypophosphite on nickel electrode.