1. NAME = HARSH MANGLA
CLASS = X B
ROLL . NO = 11
SUBJECT = SCIENCE
TOPIC = ELECTROLYSIS OF WATER
RAWAL INTERNATIONAL
SCHOOL

2. “Energy can neither be created or
destroyed, it can only be changed from
one form to another”
– Albert Einstein

3. Conventional Alternate

4. How do we store electricity?
Through chemistry
battery
hydrogen

5. Why is Hydrogen such a big
deal?
Energy Density
(Mega Joules per kilogram)
Li-ion Battery 0.54
Gasoline 46.9
Hydrogen 120.0
~ 220 times more energy than batteries
~ 2.6 times more energy than gasoline
NO AVAILABLE SOURCE OF
HYDROGEN

6. Electrolysis of Water
H2 and O2

7. What do we need?
• Water
• Electrolyte (PEM, salt water, citric acid)
• Metal electrodes (Anode +, Cathode -)
• Electricity

8. Chemical what Happens
2H2O O2+4H++4e-
4H++4e-2H2
2H2O O2+2H2

9. What is a PEM
• PEM – Proton Exchange Membrane
• Used as fuel cells to produce electricity
• Must use deionized water
• Can be run backwards as an electrolyses

10. Proton Exchange Membrane

11. DEMO
4H++4e-2H22H2O O2+4H++4e-

12. How do we use the Hydrogen?
• Fuel Cells (electrolyzer in reverse)
• Run on H2 and O2 to form clean water.
• Water can then be recycled to electrolyzer.

13.  Setup PEM electrolyzer(s).
 Produce efficiency curves of PEM using simple
circuitry.
 Determine Hydrogen Generation Rate vs.
Power input.
Build our own electrolyzer
powered by our Solar Cells

14. Electrolyte
Solar Cell

15. Design a Power Plant
Electricity!!!

16. Solar Cells

17. THANK
YOU