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Carbon-supported Ta-based electrocatalysts for the oxygen reduction and evolution reactions

AuthorsRuiz Cornejo, Juan Carlos; Sebastián del Río, David ; Martínez Huerta, M.ª Victoria; Lázaro Elorri, María Jesús
Bifunctional oxygen electrodes
Oxygen reduction reaction
Oxygen evolution reaction
Tantalum sub-oxides
Issue Date2019
AbstractElectrocatalytic materials with high efficiency for the main reactions on bifunctional oxygen electrodes, the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), are necessary for the development of new emerging electrochemical energy storage and conversion devices. Although some noble metals such as Pt and metal oxides (RuO2, IrO2) possess excellent activity as electrocatalysts, their high cost and instability hinder large-scale applications. Tantalum-based materials have demonstrated to be active and robust electrocatalysts for the ORR in acidic environment1. They have an excellent electrochemical stability and become active for the oxygen reactions when the surface stoichiometry is tuned2. Carbon materials can act both as support and electron conductor phase. In this work, nanocomposites based on tantalum sub-oxides on carbon black have been investigated for the ORR and OER3.
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(ICB) Comunicaciones congresos
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