Chinese chemists have developed a
electrolyzer — a device for producing
hydrogen from water with solar
deliberately refused to use
expensive materials: the basis of the cell, the catalysts of the nanorods of cobalt oxide and
perovskite solar cell, which are enclosed in a packaging film.
solar energy to hydrogen — 6,7
in the journal ACS
of the main disadvantages of solar
— the intermittent nature of the work.
The power issued by the solar
power plant depends on the season,
the time of day and weather. So
for effective use of solar
energy need to learn to stock up
the energy in the daytime to
then use it, for example at night.
The problem can be solved by combining two technologies: photovoltaics
the production of hydrogen.
this electricity device, which
developed a solar panel immediately
is used to separate hydrogen from water by
electrolysis. Further, the hydrogen can be used for
generate electricity in the dark,
also to store and transport.
The energy in this device are converted twice:
incident photons goes into
and then into the energy of chemical bonds
Losses occur at both stages,
therefore, the effectiveness of such
not very high: the best show
the effectiveness of the 16-19
Usually such devices
made from silicon solar
as catalysts use
platinum group metals —
platinum, iridium and ruthenium, and
these materials are quite expensive, which
difficult to further scale
Chemists under the leadership of
Jun Lou (Jun
for the first time
expensive materials: solar
the item is made from lead-galogenidov
and the catalyst for
electrolysis of water —
the cobalt oxide.