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由于E°Pr(Ⅳ)/Pr(Ⅲ)高达3.2V,Pr(Ⅳ)化合物的制备远比Pr(Ⅲ)化合物困难。早期一般是在较苛刻的条件下,主要用干法或非水体系中制得。在水溶液中难以稳定存在。(E~eO2~+h~+/H_2O=+1.22V)。1980年D.E.Hobart曾报导在5.5M K_2CO_3-1M KOH的
Pr (IV) compounds are far more difficult to prepare than Pr (III) compounds due to the E Pr (IV) / Pr (III) up to 3.2V. Early is generally under harsh conditions, mainly dry or non-aqueous system. It is difficult to stably exist in aqueous solution. (E ~ eO2 ~ + h ~ + / H_2O = + 1.22V). D.E.Hobart 1980 has been reported in 5.5M K_2CO_3-1M KOH