why can't you use hydrogen for driving a car

[VanAnthony]

You can't use pure hydrogen in a standard car engine designed for gasoline because it would cause severe damage. However, hydrogen is used in specially engineered Fuel Cell Electric Vehicles (FCEVs), which create electricity to power an electric motor. The main barriers to widespread adoption are the lack of hydrogen refueling infrastructure, the high cost of producing and transporting the fuel, and significant energy losses in the production process.

The core challenge isn't the fuel itself but the entire ecosystem required to support it. Producing pure hydrogen is energy-intensive. The most common method, steam methane reforming, uses natural gas and releases carbon dioxide, negating some environmental benefits. "Green hydrogen," made using renewable electricity, is clean but currently accounts for less than 1% of global production and is very expensive.

Storing hydrogen onboard a vehicle is another hurdle. To hold a useful amount, hydrogen must be compressed to 10,000 psi (700 bar) or liquefied at extremely cold temperatures (-423°F / -253°C). This requires heavy, expensive tanks and complex safety systems, reducing space and efficiency compared to a gasoline tank or battery pack.

Finally, the refueling station network is extremely limited, especially outside of California. Building a single hydrogen station can cost over $2 million, making it a risky investment without a large base of FCEVs. For most drivers, the convenience and established infrastructure of battery-electric vehicles make them a more practical zero-emission choice today.

Challenge	Key Data Points	Impact on Widespread Use
Production Cost	Green hydrogen: ~$5-6/kg (goal: < $1/kg by 2030)	High fuel cost for consumers compared to gasoline or electricity.
Refueling Infrastructure	~60 public stations in the U.S. (mostly in CA); over 60,000 public EV charging stations.	"Chicken and egg" problem: no cars without stations, no stations without cars.
Vehicle Cost	Toyota Mirai FCEV starts at ~$50,000, often reliant on significant incentives and fuel credits.	High upfront cost limits consumer adoption.
Energy Efficiency (Well-to-Wheel)	FCEV: 25-35%; Battery Electric Vehicle (BEV): 70-90%.	More primary energy is required to power an FCEV the same distance as a BEV.
Hydrogen Storage	Tanks withstand 10,000 psi; liquid hydrogen must be kept below -423°F (-253°C).	Adds weight, cost, and complexity to vehicle design, impacting interior space.
Production Method	Over 95% of H2 from fossil fuels (grey/blue hydrogen); green hydrogen is minimal.	Environmental benefit is limited unless the hydrogen production is clean.

[Leanne]

As a regular driver, the biggest issue is plain and simple: where do you fill up? I've never seen a hydrogen pump. Even if I bought the car, I'd be stuck. My buddy looked into one, and the closest station was two hours away. It's a cool technology, but until it's as easy to find as a gas station, it's just not practical for everyday life. I'll stick with my regular hybrid for now.

[FernandoRose]

Think of it like this: hydrogen is an energy carrier, not a source. You have to put a lot of energy in to make the hydrogen first. By the time you produce it, compress it, transport it, and then convert it back to electricity in the car's fuel cell, you've lost a huge amount of the original energy. A battery-electric vehicle is far more efficient, plugging directly into the grid. For most applications, hydrogen's complexity and energy loss make it a tough sell.

[VanElliot]

The problem is the whole system, not just the car. Making clean "green" hydrogen is expensive. Building thousands of new, specialized fueling stations costs billions. And the cars themselves are still pricey. It's a massive infrastructure puzzle that nobody has fully solved yet. While it might be great for long-haul trucks someday, for passenger cars, the electric charging network is already here and growing fast. Hydrogen cars are a solution waiting for a problem that batteries are already solving.

[Emmy]

Hydrogen cars themselves are real and drivable, but the barriers are economic and logistical. The fuel is costly to produce cleanly. The storage tanks are high-tech and expensive. And the refueling network is minuscule. It's a classic chicken-and-egg scenario: car companies won't mass-produce cars without stations, and energy companies won't build stations without cars. Until there's a major coordinated push to solve both sides simultaneously, hydrogen passenger cars will remain a niche option in a few specific regions.