What is photochemical water splitting?
In photoelectrochemical (PEC) water splitting, hydrogen is produced from water using sunlight and specialized semiconductors called photoelectrochemical materials, which use light energy to directly dissociate water molecules into hydrogen and oxygen.
What is water splitting mechanism?
Water splitting is the chemical reaction in which water is broken down into oxygen and hydrogen: 2 H2O → 2 H2 + O. 2. Efficient and economical water splitting would be a technological breakthrough that could underpin a hydrogen economy, based on green hydrogen.
Which mechanism of photosynthesis is responsible for splitting of water?
photosystem II
The mechanism of photosynthetic water splitting† Water is photochemically oxidized by the protein complex photosystem II (PSII), which is found, along with other proteins of the photosynthetic light reactions, in the thylakoid membranes of cyanobacteria and of green plant chloroplasts.
How does electrochemical water splitting work?
Electrolytic water splitting is driven by passing the electrical current through the water, where conversion of the electrical energy to chemical energy takes place at the electrode-solution interface through charge transfer reactions in a unit called an electrolyser [34].
How is hydrogen produced in photoelectrochemical water splitting?
In photoelectrochemical (PEC) water splitting, hydrogen is produced from water using sunlight and specialized semiconductors called photoelectrochemical materials, which use light energy to directly dissociate water molecules into hydrogen and oxygen.
How is photocatalytic water splitting used in photosynthesis?
Photocatalytic water splitting is an artificial photosynthesis process with photocatalysis in a photoelectrochemical cell used for the dissociation of water into its constituent parts, hydrogen (H. 2) and oxygen (O. 2), using either artificial or natural light.
What is the quantum yield of photocatalytic water splitting?
The photocatalyst gives a quantum yield of 5.9% along with a water splitting rate of 0.4 mmol/h. Tuning the catalyst was done by increasing calcination temperatures for the final step in synthesizing the catalyst.
How does the PEC water splitting process work?
This is a long-term technology pathway, with the potential for low or no greenhouse gas emissions. How Does it Work? The PEC water splitting process uses semiconductor materials to convert solar energy directly to chemical energy in the form of hydrogen.
