THE INFLUENCE OF HEAT ON THE MEASUREMENT OF PHOTOCURRENT AT THE ANODIC FILM OF NICKEL ELECTRODE

摘要

The influence of heat on the measurement of photocurrent for nickel electrode in 1M NaOH solution was investigated by using photocurrent, photothermal and thermal current methods. It was found that under the light irradiation the photocurrent appeared in the Ni(OH)_2/ NiOOH redox potential region should be mainly attributed to the influence of heat, instead of the semiconductor properties of the anodic layer. It should be considered that during the irradiation of light the increase of temperature at the surface of working electrode might disturb the photocurrent measurement.