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Electrolysis of Water

Electrolysis of Water. Peter Lindner Ridgewood High School December 1, 2010. “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 Fossil Fuels Batteries

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Electrolysis of Water

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  1. Electrolysis of Water Peter Lindner Ridgewood High School December 1, 2010

  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 Fossil Fuels Batteries Hydrogen

  5. Why is Hydrogen such a big deal? ~ 220 times more energy than batteries ~ 2.6 times more energy than gasoline NO AVAILABLE SOURCE OF HYDROGEN

  6. Electrolysis of Water Electrolysis: Using electricity to drive a non-spontaneous chemical reaction H2 and O2

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

  8. Chemical what Happens • Anode (positive): • Cathode (negative): OVERALL: 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 electrolyzer

  10. Proton Exchange Membrane

  11. DEMO 2H2O O2+4H++4e- 4H++4e-2H2

  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. What are we going to do? • 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. Solar Cell Electrolyte

  15. Design a Power Plant

  16. What Industry Wants to Make Solar Cells

  17. Electrolysis of Water • http://www.youtube.com/watch?v=VnYSw349qvM

  18. Questions???

  19. Take Away’s • Solar cells can make electricity • That electricity can be used to produce hydrogen from water • Hydrogen can be used to store energy • Electricity can then be produced by running hydrogen through Fuel cells. PEM – Proton Exchange Membrane Anode – Positive Electrode Cathode – Negative Electrode

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