What are the 6 different types of fuel cells?
Types of Fuel Cells
- Polymer electrolyte membrane fuel cells.
- Direct methanol fuel cells.
- Alkaline fuel cells.
- Phosphoric acid fuel cells.
- Molten carbonate fuel cells.
- Solid oxide fuel cells.
- Reversible fuel cells.
Do fuel cells require platinum?
Platinum is a necessary component of the electrodes of fuel cell engines. It is deposited on porous electrodes, where it serves as the electrocatalyst to promote the rate of electrochemical reactions required to encourage H2 to release electrons and become H2 ions.
Why do fuel cells need platinum?
Platinum is especially suited as a fuel cell catalyst as it enables the hydrogen and oxygen reactions to take place at an optimal rate, while being stable enough to withstand the complex chemical environment within a fuel cell, as well as the high electrical current density, performing efficiently over the long-term.
What is the most efficient fuel cell?
Alkaline Fuel Cells Operating at 60-70ºC (140-158ºF), AFCs are among the most efficient type of fuel cells, reaching up to 60% efficiency and up to 87% combined heat and power.
What is currently the most successful fuel cell?
Stationary fuel cells are the largest, most powerful fuel cells. They are designed to provide a clean, reliable source of on-site power to hospitals, banks, airports, military bases, schools, and homes. Fuel cells can power almost any portable device or machine that uses batteries.
What is the difference between SOFCs and PEM based fuel cells?
PEMFC is compact and handles generally load variations better. SOFC is not as compact and works at higher temperatures than PEMFC. The SOFC can be combined with a gas turbine increasing its efficiency. If waste heat recovery is used its efficiency is further increased.
Can solid oxide fuel cells use hydrogen?
Fuel : PEM fuel cells use pure hydrogen (H2) as fuel. Meanwhile, solid oxide fuel cells can use hydrocarbon fuels such as natural gas, methane and propane to produce electricity.
Which catalyst is used in fuel cell?
platinum catalyst
The fuel cells typically use a platinum catalyst to speed up the reaction at the oxygen electrode, but platinum is expensive. The start-up and operation of the fuel cell also introduces side reactions that damage the efficacy of the catalyst.
How can I make my fuel cell cheaper?
To minimise the price of the fuel cell, the catalyst must be modified from noble metals to cheap bimetallic nano-composite which can generate high power at low cost. Additionally, if the electrolytic membrane gets self humidified and has long stability in the high range of current and different operating conditions.
Can you make a hydrogen fuel cell without platinum?
Summary: Researchers have developed a hydrogen fuel cell that uses iron instead of rare and costly platinum, enabling greater use of the technology. Imperial researchers have developed a hydrogen fuel cell that uses iron instead of rare and costly platinum, enabling greater use of the technology.
Is there an alternative to platinum?
Summary: A cost-effective catalyst material has been produced for fuel cells using a new preparation process which researchers analyzed in detail.