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研究了RuO_2-SnO_2混合金属氧化物电极,它对NaCl溶液中的析氯反应具有良好的电催化活性及选择性。采用XPS(X射线光电子光谱)研究了电极表画的组成,发现金属阳极〔DSA(Ru-Sn〕表面的钌含量和吸附氯含量均高于DSA(Ru-Ti)。采用电位滴定法研究电极表面酸碱性,测定了零电荷点(PZC)和零电荷点的移动(ΔPZC)的数值,显示了DSA(RuO_2-SnO_2)表面的酸性更强,Cl的特性吸附也更强。由此得出:混合金属氧化物电极的电催化行为与其表面组成及性质存在密切关系。
The RuO_2-SnO_2 mixed metal oxide electrode has been studied. It has good electrocatalytic activity and selectivity for chlorine evolution reaction in NaCl solution. The composition of the electrode sheet was studied by XPS (X-ray photoelectron spectroscopy). It was found that the ruthenium content and adsorbed chlorine content of the surface of the metal anode [DSA (Ru-Sn) were higher than that of the DSA Surface acidity and alkalinity, the values of ΔPZC and zero charge point (PZC) were measured. The results show that the surface of DSA (RuO_2-SnO_2) is more acidic and Cl is more adsorbed Out: The electrocatalytic behavior of the mixed metal oxide electrode is closely related to its surface composition and properties.