Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 87, Issue -, Pages 1-4Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2017.12.017
Keywords
Thin film; Electrocatalyst; OER; AACVD; Oxide; Alkaline
Categories
Funding
- UK EPSRC Joint University Industry Consortium for Energy (Materials) and Devices Hub [EP/R023662/1]
- Engineering and Physical Sciences Research Council [1820614, EP/R023662/1] Funding Source: researchfish
- EPSRC [EP/R023662/1] Funding Source: UKRI
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The electrocatalytic behaviour of CoFe2O4 thin films, prepared by aerosol-assisted chemical vapour deposition, towards the oxygen evolution reaction in an alkaline medium is reported. X-ray diffraction and SEM data show that the CoFe2O4 thin films are phase pure and consist of dendrites 0.5-1 mu m in diameter rising from the surface with heights ranging from 1 to 3 mu m. The CoFe2O4 thin films exhibited an overpotential of 490 mV at a current density of 10 mA cm(-2), and a Tafel slope of 54.2 mV dec(-1). Taking into account the electrochemically active surface area, the intrinsic activity of CoFe2O4 was found to be 1.75 mA cm(-2) real at an overpotential of 490 mV. The CoFe2O4 thin films were highly stable and were capable of maintaining catalytic activity for at least 12 h.
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