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 μm in diameter rising from the surface with heights ranging from 1 to 3 μm. 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.

报道了通过气溶胶辅助化学气相沉积制备的CoFe ₂ O ₄薄膜在碱性介质中对氧释放反应的电催化行为。X射线衍射和SEM数据表明，CoFe ₂ O ₄薄膜是相纯的，由直径从0.5到1μm的树枝状晶体组成，其表面高度从1到3μm不等。CoFe ₂ O ₄薄膜在10 mA cm ^-2的电流密度下表现出490 mV的过电势，并且Tafel斜率为54.2 mV dec ^-1。考虑到电化学活性表面积，CoFe ₂ O ₄的固有活性发现在490 mV的超电势下为1.75 mA cm ^-2_实数。CoFe ₂ O ₄薄膜具有很高的稳定性，并能够保持至少12小时的催化活性。