Not exact matches
A conventional
water -
splitting device consists of two
electrodes submerged in a
water - based electrolyte.
A solar cell
splits water with two
electrodes, producing oxygen on one
electrode, while generating hydrogen on the other.
Therefore, in this solar cell that
splits water, oxygen is generated on this new
electrode, while hydrogen is generated on the other
electrode.
Many of us are familiar with electrolytic
splitting of
water from their school days: if you hold two
electrodes into an aqueous electrolyte and apply a sufficient voltage, gas bubbles of hydrogen and oxygen are formed.
This created a PEC
electrode that can at once generate current and catalyse the
water -
splitting process.
When sunlight hits the
electrode, it generates an electric current that
splits the
water into its constituent parts, hydrogen and oxygen.
Conventional solar
electrodes made of silicon quickly corrode when exposed to oxygen, a key byproduct of
water splitting.
The device developed at UCLA has a third
electrode that acts as both a supercapacitor, which stores energy, and as a device for
splitting water into hydrogen and oxygen, a process called
water electrolysis.
The stream of electrons between these
electrodes carry out separate reactions that
split water and CO2, ultimately generating CO and more
water.
Building on work that JCAP researchers at Berkeley Lab did on PEC cells —
splitting water into hydrogen on one
electrode and oxygen on the other — Weber and his team are further refining the cells to bring down the cost and integrate them into devices.