CEREI is doing cutting edge research in hydrogen energy technolygy. Our hydrogen energy projects include development of Proton Electrolyte Membrane Fuel Cells (PEMFC) and hydrogen production. Our unique goal is to optimize PEMFCs energy output (fuel-to-electricity conversion performance) and improve their lifetime to ensure a marketable and affordable hydrogen energy technology.
Key research areas:
- Electrochemical synthesis and characterizations of advanced nanostructured catalysts and composite materials for Proton Electrolyte Membrane Fuel Cells (PEMFCs)
- Catalysis: electrocatalytic activities of advanced platinum and non-platinum based electrode materials for the cathodic and anodic reactions in fuel cells
- Effects of synthesis techniques, catalyst chemical composition and loading on the fuel cell energy output and hydrogen generation
- Effects of particle size on the cathodic and anodic reaction kinetics in PEMFCs
- Electrodes stability and durability
- Electrochemical generation of hydrogen
- Fuel cells electrochemistry and thermodynamics
What is a fuel cell?
A
fuel cell is an electrochemical device that directly produces
electrical energy out of chemical energy stored in a fuel. It consists
of an electrolyte medium sandwiched between an anode and a cathode that
catalytically enhanced oxidation and reduction reactions at their
interface, respectively. Since the energy conversion process takes
place electrochemically, no combustion is involved. As a result, the
process is clean and more efficient at fuel conversion to end-use
energy. Moreover, unlike batteries, the fuel cell is expected to
generate electrical power as long as fuel is supplied. The diagram
below illustrates the operating mechanism of hydrogen fuel cell which
will not increase environmental contaminants as used batteries will.
Fuel cells offer alternative solutions to traditional energy sources among which we can list the followings:
- More efficient fuel-to-electricity conversion
- Utilization of by-product heat, enhancing the overall energy efficiency
- Independence from traditional energy sources
- High quality DC power and unlimited runtime
- The absence of combustion in the energy conversion process results in carbon emission-free energy system
- PEMFCs operate at relatively low temperatures (80 °C or 176 °F), and are suited for applications, such as buildings and automobiles (less warm up time)
Fuel cells are reliable and their energy output can be enhanced by
increasing the number of unit cells
1. Hydrogen fuel and oxygen (air) are fed into the anode
and cathode of the fuel cell, respectively.
2. Aided by a catalyst, hydrogen molecules split into
electrons and protons. The protons pass into an electrolyte,
sandwiched between the cathode and the anode.
3. Electrons travel through an external circuit producing
electricity.
4. Electrons get back to the cathode, to combine with the
protons and oxygen molecules to form water.