• Surface modification of RuO2 electrodes by laser irradiation and ion implantation: Evidence of electrocatalytic effects

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/121/05/0639-0646

    • Keywords

       

      Electrocatalysis; surface modification; laser irradiation and ion irradiation.

    • Abstract

       

      RuO2 thin layers were deposited on Ti supports by thermal decomposition of RuCl3 at 400°C. Some of the samples were subjected to laser irradiation between 0.5 and 1.5 J cm-2. Some others to Kr bombardment with doses between 1015 and 1016 cm-2. Modifications introduced by the surface treatments were monitored by cyclic voltammetry and O2 evolution in H2SO4 solution. The voltammetric charge increased with surface treatment almost to the same extent for irradiation and bombardment. The electrocatalytic activity turned out much higher for Kr bombarded samples. Raw experimental data were scrutinized in an attempt to separate geometric from electronic factors. True electrocatalytic effects are clearly seen to prevail over purely surface area effects.

    • Author Affiliations

       

      E Guerrini1 A Colombo1 S Trasatti1

      1. Department of Physical Chemistry and Electrochemistry, University of Milan, Via Venezian 21, 20133 Milan, Italy
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