氧化钯作为电位型传感器中敏感电极的工作机理（英文）

发布时间：2018-04-02 20:22

本文选题：氧化钯　切入点：电位型传感器　出处：《物理化学学报》2017年03期

【摘要】：研究了基于氧化钯(PdO)电极的电位型传感器的敏感特性,并探讨了其敏感机理。首先,利用Mg、Ni和La元素对PdO电极进行掺杂,将掺杂后的PdO电极印刷在氧化锆电解质上,制备成电位型传感器,并对一氧化碳(CO)的敏感特性进行了测试。由于掺杂后的PdO电极表面缺陷增加,这有利于对CO的吸附,有效地提高了传感器的灵敏度。其次,为了探究敏感信号的来源,PdO电极分别印刷在氧化铝和沸石基片上,同样测试了对CO的敏感特性。其中PdO电极与沸石所组成的电位型传感器对CO浓度可以产生阶梯型响应。最后,对传感器分别进行了电阻和阻抗谱的测量,测量结果表明:传感器的响应可以归因于电极和电解质之间界面电位的变化。综合上述研究结果,建立了电偶层模型来解释基于PdO电极的电位型传感器的工作机理。
[Abstract]:The sensitivity characteristics and mechanism of potentiometric sensor based on PdO electrode were studied.Firstly, the PdO electrode was doped with Ni and La elements. The doped PdO electrode was printed on zirconia electrolyte to form a potentiometric sensor. The sensitive properties of CO were tested.Due to the increase of the surface defects of the doped PdO electrode, it is advantageous to the adsorption of CO, and the sensitivity of the sensor is improved effectively.The potential sensor composed of PdO electrode and zeolite can produce step response to CO concentration.Based on the above results, an electric couple layer model is established to explain the working mechanism of the potentiometric sensor based on PdO electrode.
【作者单位】：宁波大学信息科学与工程学院;大连民族大学机电工程学院;
【基金】：supported by the National Natural Science Foundation of China(61471210,61501271,51472126) Natural Science Foundation of Ningbo Municipality,China(2015A610108) K.C.Wong Magna Fund in Ningbo University,China~~
【分类号】：TP212

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