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[Qing Feng,Kuaishe Wang,Jianchao Xue,Bo Jia and Xiaojun Hao.Improving Electrocatalytic Activity of IrO2-Ta2O5 Electrode for Oxygen Evolution in Sulfuric Acid Solution by Mn-doping[J].Rare Metal Materials and Engineering,2022,51(8):2810~2815.]
Improving Electrocatalytic Activity of IrO2-Ta2O5 Electrode for Oxygen Evolution in Sulfuric Acid Solution by Mn-doping
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Received:March 29, 2022  Revised:July 22, 2022
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Key words: oxygen evolution reaction  IrO2-Ta2O5 anode  manganese  electrochemical behavior
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Author NameAffiliation
Qing Feng,Kuaishe Wang,Jianchao Xue,Bo Jia and Xiaojun Hao  
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Abstract:
      IrO2-Ta2O5-MnOx electrodes with different Mn contents were prepared. The effect of Mn content on the physical and electrochemical characteristics of these electrodes was revealed. The results show that the coated IrO2-Ta2O5-MnOx layer has a larger specific surface area due to its bumpy and porous structure. The doping of a small amount of Mn inhibits the crystallization of the active ingredient IrO2 and turns it into Ir3+. With properly replacing Ir with Mn, the electrocatalytic performance of the IrO2-Ta2O5-MnOx electrodes can be enhanced dramatically. The increased electrocatalytic activity, longer lifetime and lower cost benefit from the larger active surface area of the Mn-doped electrode, thus promoting the release of oxygen in the sulfuric acid solution.