The oxhydroelectric effect consists in the generation of voltage and electric current in pure liquid water, without any electrolyte, upon exposure to electromagnetic radiation in the infrared range, after creating a physical (not chemical) asymmetry in liquid water e.g. thanks to a strongly hydrophile polymer, such as Nafion. 
Since the publication of the first seminal research, other independent research has been published, which refer to this effect, in scientific peer reviewed, reputable journals (with  impact factors higher than the median in the respective fields).
The system can be described as a photovoltaic cell operating in the infrared electromagnetic range, based on liquid water instead of a semiconductor.