A German research team has developed a new photovoltaic-electrochemical device for alkaline water electrolysis. The prototype has an initial solar‐to‐hydrogen efficiency of approximately 7.7%.
Japanese researchers have developed a new water-splitting technology based on a photoelectrochemical system made with titanium dioxide and cobalt. Cobalt is said to be a solid alternative to noble metals such as gold and silver to improve the light-absorbing properties of titanium dioxide used for water oxidation.
The cell uses a novel approach that increases its conversion efficiency and longevity at the same time. Researchers claim it is a new world record for this type of application and highlight its importance in storing renewable energy in hydrogen to compensate for output and demand fluctuations.
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