Journal
CHEMPLUSCHEM
Volume 82, Issue 3, Pages 483-488Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cplu.201700005
Keywords
3D electrodes; ion precursors; layered double; hydroxides; oxygen evolution reaction; water splitting
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Funding
- National Science Foundation of China [21403174]
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Highly active, cost-effective, and durable catalysts for oxygen evolution reaction (OER) are required in energy conversion and storage processes. A facile synthesis of CoFe layered double hydroxide (CoFe LDH) is reported as a highly active and stable oxygen evolution catalyst. By varying the concentration of the metal ion precursor, the Co/Fe ratios of LDH products can be tuned from 0.5 to 7.4. The structure and electrocatalytic activity of the obtained catalysts were found to show a strong de-pendence on the Co/Fe ratios. The Co2Fe1 LDH sample exhibited the best electrocatalytic performance for OER with an onset potential of 1.52 V (vs. the reversible hydrogen electrode, RHE) and a Tafel slope of 83 mVdec(-1). The Co(2)Fe1 LDH was further loaded onto a Ni foam (NF) substrate to form a 3D porous architecture electrode, offering a long-term current density of 100 mAcm(-2) at 1.65 V (vs. RHE) towards the OER.
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