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电解时电极材料的不同会影响到溶液中离子是否放电,特别是阳极材料对离子放电的影响较大。 阳极若为金属电极时称为活泼电极,一般情况下是作为电极的金属失去电子,被氧化成阳离子而溶解。溶液中的阴离子失电子能力不如金属,此时将不能失去电子而放电。 阳极若为惰性电极时(如石墨、铂等),则电解时溶液中的阴离子在阳极上失去电子而放电,其放电的难易程度跟阴离子本身的还原能力有关,还原能力越强、失去电子的机会
The difference in electrode material during electrolysis may affect the discharge of ions in the solution. In particular, the anode material has a greater impact on ion discharge. When the anode is a metal electrode, it is called an active electrode. Generally, the metal as the electrode loses electrons and is oxidized to cations and dissolved. The anion loses electron in the solution, which is not as good as metal. At this time, it will not lose electrons and discharge. When the anode is an inert electrode (such as graphite, platinum, etc.), the anion in the solution loses electrons and discharges on the anode during electrolysis. The degree of difficulty in discharging is related to the reducing ability of the anion itself, and the stronger the reducing power is, the more electrons are lost. Opportunity