NAME = HARSH MANGLACLASS = X B

ROLL . NO = 11SUBJECT = SCIENCE

TOPIC = ELECTROLYSIS OF WATERRAWAL INTERNATIONAL

SCHOOL

“Energy can neither be created or destroyed, it can only be changed from one form to another”

– Albert Einstein

Conventional Alternate

How do we store electricity?

Through chemistry

battery

hydrogen

Why is Hydrogen such a big deal?

Energy Density (Mega Joules per kilogram)

Li-ion Battery 0.54Gasoline 46.9Hydrogen 120.0

~ 220 times more energy than batteries

~ 2.6 times more energy than gasolineNO AVAILABLE SOURCE OF HYDROGEN

Electrolysis of WaterElectrolysis: Using electricity to drive a non-spontaneous chemical reaction

H2 and O2

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

Chemical what Happens

• Anode (positive):

• Cathode (negative):

OVERALL:

2H2O O2+4H++4e-

4H++4e-2H2

2H2O O2+2H2

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

Proton Exchange Membrane

DEMO

4H++4e-2H22H2O O2+4H++4e-

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.

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

What are we going to do?

Electrolyte

Solar Cell

Design a Power Plant

Electricity!!!

WHAT INDUSTRY WANTS TO MAKE

Solar Cells

THANK YOU