用直流磁控溅射设备制备的镍铁氧化物薄膜作为电解水的阳极材料在不同温度的1M KOH溶液中析氧活性不同.当电流密度为10mA/cm2时,过电位由22℃时的299mV下降到60℃时的292mV.在低过电位区,Tafel斜率b为27～28mV/dec;高过电位区,Tafel斜率为130～150mV/dec,并未发现斜率的突变.说明在一定范围内温度的提高并未改变析氧的速控步骤,同时该过程的动力学数据还表明电极析氧反应的可逆性没有显著变化.
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