Abstract
Herein, we demonstrate a direct growth of amorphous metal oxyhydroxide (AMO) attached on CeO2 by a galvanic replacement mechanism as advanced oxygen evolution reaction (OER) catalyst. In this unique structure, the CeO2 substrate not only offers high specific surface area for the formation of AMO, but also provides high conductivity, guaranteeing the promoted electron transfer for the catalytic reaction. In addition, the AMO on the surface of the CeO2 exposes abundant active sites for the OER. Benefiting from the above advantages, the as-prepared AMO@CeO2 supported on nickel foam (AMO@CeO2/NF) exhibits excellent OER performance with low overpotential of 261 mV at 10 mA cm−2, high turnover frequency of 0.07 s−1 at 20 mA cm−2 and superior stability in 1.0 M KOH.
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