Synergistic Effect of Cobalt and Iron in Layered Double Hydroxide Catalysts for the Oxygen Evolution Reaction

Citations Over TimeTop 10% of 2016 papers

Abstract

Co-based layered double hydroxide (LDH) catalysts with Fe and Al contents in the range of 15 to 45 at % were synthesized by an efficient coprecipitation method. In these catalysts, Fe3+ or Al3+ ions play an essential role as trivalent species to stabilize the LDH structure. The obtained catalysts were characterized by a comprehensive combination of surface- and bulk-sensitive techniques and were evaluated for the oxygen evolution reaction (OER) on rotating disk electrodes. The OER activity decreased upon increasing the Al content for the Co- and Al-based LDH catalysts, whereas a synergistic effect in Co- and Fe-based LDHs was observed, which resulted in an optimal Fe content of 35 at %. This catalyst was spray-coated on Ni foam electrodes and showed very good stability in a flow-through cell with a potential of approximately 1.53 V at 10 mA cm-2 in 1 m KOH for at least 48 h.

Related Papers

• → Intercalation behavior of l-ascorbic acid into layered double hydroxides(2006)77 cited
• → Direct synthesis of a polyoxometallate-pillared layered double hydroxide by coprecipitation(1993)60 cited
• → Synthesis of Layered Double Hydroxides with Novel Morphologies(2009)1 cited
• → Synthesis of Nano-Branched Ni/Fe Layered Double Hydroxides(2014)
• Comparative study of the coprecipitation methods for the preparation of Layered Double Hydroxides(2000)