DIY Green Energy For Homes
 

How to Build a Hydrogen Fuel Cell

A fuel cell is a device that converts electrochemical energy into electricity. A hydrogen fuel cell produces water from hydrogen and oxygen and, in the process, generating electricity.

You might be more familiar with another electrochemical cell called a battery. With a battery however, all its chemicals are stockpiled inside, which it converts into electricity. This also means that it will ‘go dead’ and. You’ll either recharge it or dump it.

As for a fuel cell, it never goes dead because the chemicals constantly flow into the cell, while electricity flows out. Majority of fuel cells in use currently use hydrogen and oxygen. Other chemicals that can be used include alcohol, gasoline, and methane.

Hydrogen fuel cells are used in high-tech applications, as well as spacecraft, because they are pollution free and are efficient sources of energy. Hydrogen doesn’t exist entirely on its own, thus it has to be extracted from another compound.

Its pretty easy to assemble a hydrogen cell; we’ll look at the steps to assemble a home-made hydrogen cell. You will need the following materials:

  • A foot-long platinum coated nickel wire (pure platinum is not easy to find)
  • A piece of wood or popsicle stick
  • A 9-volt battery and a battery clip
  • Transparent tape
  • Voltmeter 

magniwork

The first step is to make two 6-inch long wire pieces by cutting the platinum wire into two. Make coiled springs by winding the two wires; these will be the electrodes in the fuel cell. Use a nail or an ice pick as a coil form to wind the wires.

When you’ve got your electrodes, get the battery clip and cut the leads in half, then peel off the insulation at the cut ends. Curl the exposed battery lead wires around the ends of the platinum coated electrodes. The battery clip is to be fastened to the electrodes, as well as two other wires which will connect to the volt-meter.

The next step is to attach the electrodes to the popsicle stick and secure them tight using tape. Place the popsicle stick atop a glass of water such that the electrodes freely dangle in the water, with almost their entire length immersed. Ensure that the twisted wire connections do not touch the water and, only the electrodes are in water. Tape the popsicle stick on to the glass so that it’s firm.

At this point, the volt-meter should read zero when the red wire is connected to its positive terminal, and the black wire to the negative. Its common for a small voltage to show up and read, for instance 0.01 volts.

The cell is fully assembled now, but you would need to operate it by causing hydrogen bubbles to cohere at one electrode and oxygen bubbles to cohere to the other. To do this, you just lightly touch the battery clip to the 9-volt battery (no need to clip it).

When the battery touches the battery clip, water molecules at the electrodes split into oxygen and hydrogen, which process is known as electrolysis. The platinum coating acts as a catalyst that makes it easier for the hydrogen and oxygen to recombine. Hydrogen and oxygen will recombine to generate electricity and water again, in a reverse electrolysis reaction.

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