What are the main challenges in using hydrogen fuel cells in India?

In one line

The rule

Hydrogen fuel cells are electrochemical devices that convert chemical energy from hydrogen and oxygen into electrical energy, with water and heat as byproducts. (NCERT, Class 12)

The main reaction is: 2H₂ + O₂ → 2H₂O + electrical energy

• H₂ = hydrogen gas
• O₂ = oxygen gas
• H₂O = water

Let's understand it simply

Imagine you want to run your cycle with a new kind of fuel—hydrogen. Hydrogen fuel cells can give you clean energy, like a magic battery that only gives out water, not smoke. But in India, using this magic battery everywhere is not easy. Think of trying to cook for a big wedding with a new type of cooker, but you have only one shop in town selling its fuel, and the fuel is very expensive and hard to carry. That’s what India faces with hydrogen fuel cells.

How it works

1. Hydrogen gas is made, usually from water or natural gas.
2. Hydrogen is stored in tanks, then sent to the fuel cell’s anode (starting side).
3. Inside the cell, hydrogen splits into protons (tiny positive particles) and electrons (tiny negative particles).
4. Electrons flow through wires, making electricity to run things like cars.
5. Protons move through a special material to the cathode (ending side), where they meet oxygen from the air.
6. Hydrogen and oxygen combine to make water and release heat.

The story behind it

Hydrogen fuel cells were first shown by Sir William Grove in 1839 in England. He wanted to find a way to make electricity from chemical reactions. The idea was used in NASA’s space missions to give astronauts clean water and power. Now, countries want to use it for cars, buses, and even homes, but it’s still not common everywhere.

Where you see it in real life

• Hydrogen buses in Delhi: Some buses run on hydrogen fuel cells, giving out only water instead of smoke.
• Hydrogen cars abroad: Cars like Toyota Mirai use fuel cells, but are rare in India.
• Power backup in hospitals: Some hospitals use fuel cells for emergency power, but mostly outside India.
• Space rockets: NASA uses hydrogen fuel cells for electricity and water in space.
• Hydrogen filling stations: Very few in India, so it’s hard to refuel vehicles.
• Factories: Some industries use hydrogen fuel cells for clean energy, but it’s not widespread.

Why it matters

• Reduces pollution: No harmful gases, only water comes out.
• Saves fossil fuels: Less need for coal, petrol, or diesel.
• Energy security: India can make hydrogen from water, not depend on oil imports.
• Future jobs: New skills and jobs in making, storing, and using hydrogen.

Main challenges in India

1. High cost: Making hydrogen and fuel cells is expensive. Platinum (a rare metal) is used inside, which costs a lot.
2. Hydrogen storage: Hydrogen is the lightest gas. It can leak easily and needs strong, heavy tanks to store safely.
3. Lack of infrastructure: Very few hydrogen stations in India. Hard to find places to fill up.
4. Production issues: Most hydrogen in India is made from natural gas, which still causes pollution. Making it from water (electrolysis) needs a lot of electricity.
5. Transport problems: Moving hydrogen is risky. It can catch fire easily if not handled well.
6. Public awareness: Many people do not know about hydrogen fuel cells or trust them yet.
7. Policy and investment: Government support is growing, but still not enough for big change.

Worked example

Let’s see how much hydrogen is needed to power a small car for 100 km.

Suppose:

• A small car needs 1 kg hydrogen for 100 km.
• 1 kg hydrogen gives about 33 kWh (units) of energy.

Given: Car needs 1 kg H₂ for 100 km
Step 1: 1 kg H₂ = 33 kWh energy
Step 2: Compare with petrol (1 litre petrol ≈ 9 kWh)
Step 3: 1 kg H₂ = about 3.7 litres petrol energy
Step 4: But 1 kg H₂ costs ₹500–₹600 in India (2024), 1 litre petrol ≈ ₹100
Step 5: Hydrogen is much more expensive for now

Common mistakes

• Thinking hydrogen is always clean: If made from coal or gas, it still pollutes. Only green hydrogen (from water using solar/wind power) is clean.
• Believing hydrogen is easy to store: It is very light and leaks easily. Needs special tanks.
• Assuming it is ready for everyone: Hydrogen fuel cells are not yet common in Indian cars or buses.
• Ignoring safety: Hydrogen is flammable. Needs careful handling.

Remember it

Hydrogen fuel cells are clean but costly, need special storage, and India needs more stations and support to use them everywhere.