Laboratory-prepared anode materials can find a subsequent practical application if they may compete with industrially adopted devices, in terms of both noble-metal content (and thus in terms of costs) and behavior. The present communication concerns the preparation1,2 and the characterization of three different oxide coatings: a ternary mixture comprising tin, antimony and iridium oxides, and two model anode materials, i.e. IrO2 and RuO2, which are well known electrocatalysts for the oxygen and chlorine evolution, respectively. Once synthesized, the oxide characterization has been carried out focusing in particular on physical (XRD) and electrochemical (CV) data. The former analysis allowed to recognize the oxide phases as well as to estimate the average dimension of crystallites, while the number of electroactive sites and the electrochemical area could be evaluated with the latter investigation. In addition, an estimation of electrode selectivity was obtained carrying out polarization curves under chlorine and oxygen evolution conditions, respectively. Basing on obtained data, and comparing their behavior (in terms of chlorine production) with real DSA, the following selectivity order is proposed: IrO2 > SnO2-Sb2O5-IrO2 > RuO2. 1. Morozov, A.; Ferro, S.; Martelli, G.N.; De Battisti, A. WO 2005/014885; 2. Adams, B.; Tian, M.; Chen, A. Electrochim. Acta 2009, 54, 1491-1498.

Features of dimensionally stable anodes and related selectivities toward the chlorine evolution reaction

FERRO, Sergio;DE BATTISTI, Achille
2009

Abstract

Laboratory-prepared anode materials can find a subsequent practical application if they may compete with industrially adopted devices, in terms of both noble-metal content (and thus in terms of costs) and behavior. The present communication concerns the preparation1,2 and the characterization of three different oxide coatings: a ternary mixture comprising tin, antimony and iridium oxides, and two model anode materials, i.e. IrO2 and RuO2, which are well known electrocatalysts for the oxygen and chlorine evolution, respectively. Once synthesized, the oxide characterization has been carried out focusing in particular on physical (XRD) and electrochemical (CV) data. The former analysis allowed to recognize the oxide phases as well as to estimate the average dimension of crystallites, while the number of electroactive sites and the electrochemical area could be evaluated with the latter investigation. In addition, an estimation of electrode selectivity was obtained carrying out polarization curves under chlorine and oxygen evolution conditions, respectively. Basing on obtained data, and comparing their behavior (in terms of chlorine production) with real DSA, the following selectivity order is proposed: IrO2 > SnO2-Sb2O5-IrO2 > RuO2. 1. Morozov, A.; Ferro, S.; Martelli, G.N.; De Battisti, A. WO 2005/014885; 2. Adams, B.; Tian, M.; Chen, A. Electrochim. Acta 2009, 54, 1491-1498.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1685258
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