87.12 Basic principal and application of electrolysis 2. Anode reaction 1)Reaction on inert anode When inert material such as Platinum and graphite was used, the species in the solution discharge on the electrode in the order of liberation potential. F-< CI< Br-<I Henri moissan 1906 Noble prize france 1852/09/28~1907/02/20 Investigation and isolation of the element fluorine
2. Anode reaction When inert material such as Platinum and graphite was used, the species in the solution discharge on the electrode in the order of liberation potential. F− < Cl− < Br− < I− Henri Moissan 1906 Noble Prize France 1852/09/28 ~ 1907/02/20 Investigation and isolation of the element fluorine 1) Reaction on inert anode §7.12 Basic principal and application of electrolysis
87.12 Basic principal and application of electrolysis 2. Anode reaction (1)Active dissolution; 2)Reaction of active anode (2)Anodic passivation (3)Anodic oxidatio 2.0 FeOf(aq) 16 The reaction can be judged based on 1.2 Porbaix d Fe,O3 (I)Active dissolution (4) 04 At pH4 and low current density, active -0.8 Fe(s) dissolution occurs -1.2 681012 Fe→Fe2++2 Pourbaix diagram of iron-water system
(1) Active dissolution; (2) Anodic passivation (3) Anodic oxidation 2) Reaction of active anode Pourbaix diagram of iron-water system (1) Active dissolution: At pH=4 and low current density, active dissolution occurs. Fe → Fe2+ + 2e − The reaction can be judged based on Porbaix diagram 2. Anode reaction §7.12 Basic principal and application of electrolysis