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Influence of Ag(Ⅰ), Co(Ⅱ) and Ni(Ⅱ) ions on oxygen anodic evolution at Pt and Ti/Pt/PbO2 electrodes was investigated in surphuric acid solutions. The oxygen evolution reaction at Ti/Pt/PbO2 electrode in surphuric acid solutions is characterized by two linear ■~ lgi relationships. At low c.d. it is close to 2.303RT/(1+β)F, whereas at high c.d. it is close to 2.303RT/βF. Ih the presence of Ag(Ⅰ) or Ni(Ⅱ) ions in the electrolytic solution the Tafel slope of oxygen evolution tends to be low, 2.303RT/(1+β)F (with β=0.5). However, the oxygen evolution reaction at Pt electrodes in H2SO4 or CoSO4+H2SO4 solutions is characterized by one linear ■ ~ lgi relationship. The Tafel slope is close to 2.303RT/βF. In the presence of Ag(Ⅰ) or Ni(Ⅱ) ions in the electrolytic solution the Tafel slope of oxygen evolution tends to be low, 2.303RT/(1+β)F. The oxygen anodic evolution reactions are catalyzed by Ag(Ⅰ), Co(Ⅱ) and Ni(Ⅱ) ions in the electrolytic solution. when Ag(Ⅰ), or Ni(Ⅱ) was mixed with Co(Ⅱ), a promising catalyst for oxygen anodic evolution with higher catalytic activity than either of them alone was found. A comparison of the PbO2 electrode and the Pt electrode has also been given.
Influence of Ag (Ⅰ), Co (Ⅱ) and Ni (Ⅱ) ions on oxygen anodic evolution at Pt and Ti / Pt / PbO2 electrodes was investigated in surphuric acid solutions. The oxygen evolution reaction at Ti / Pt / PbO2 electrode in surphuric At low cd it is close to 2.303RT / (1 + β) F, but at high cd it is close to 2.303RT / βF. Ih the presence of Ag (Ⅰ) or Ni (Ⅱ) ions in the electrolytic solution the Tafel slope of oxygen evolution tends to be low, 2.303RT / (1 + β) F (with β = 0.5). However, the oxygen evolution reaction at Pt electrodes in H2SO4 or CoSO4 The presence of Ag (I) or Ni (II) ions in the electrolytic solution the Tafel slope of oxygen evolution tends to be low, 2.303RT / (1 + β) F. The oxygen anodic evolution reactions are catalyzed by Ag (Ⅰ), Co (Ⅱ) and Ni (Ⅱ) ions in the electrolytic solution. A promising catalyst for oxygen anodic evolution with higher catalytic activity than either of them alone was found. A comparison of the PbO2 electrode and the Pt electrode has also been given.