Now it's said that hydrogen is the cleanest energy source, and electrolysis of water can also get hydrogen, so why no one does that

Now it's said that hydrogen is the cleanest energy source, and electrolysis of water can also get hydrogen, so why no one does that

Because it's expensive! The amount of energy consumed per kilowatt-hour is too different from the amount of hydrogen produced. Although there are some new technologies that can solve this problem, they have not been popularized. The specific reason is to ask: Why is there so much oil now and so many machines to use oil?
The change is not so fast, and the cost is not unimaginable.

Because it's expensive! The amount of energy consumed per kilowatt-hour is too different from the amount of hydrogen produced. Although there are some new technologies that can solve this problem, none of them have been popularized. The specific reason is to ask: Why is there so much oil now so many machines to use oil?
The change is not so fast, and the cost is not unimaginable.

Because it's expensive! The energy consumed per kilowatt-hour is too different from the hydrogen energy produced. Although some new technologies can solve this problem, they have not been popularized. The specific reason is to ask: Why is there so much oil now and so many machines to use oil?
The change is not so fast, and the cost is not unimaginable.

Hydrogen is a high-energy clean fuel, electrolysis of water to produce hydrogen is one of the current methods to obtain hydrogen, please calculate how much electrolysis is required to obtain 20g hydrogen at least Hydrogen is a high-energy and clean fuel, and electrolysis of water to produce hydrogen is one of the current methods to obtain hydrogen. Please calculate how much electrolysis is required to obtain 20g hydrogen at least Hydrogen is a high-energy clean fuel. Electrolytic water production of hydrogen is one of the current methods to obtain hydrogen. Please calculate required to obtain 20g hydrogen at least

Set the mass of electrolytic water as xg
2H2O = Electrolysis = O2↑+2H2↑
2*18——————2*2
Xg 20g
X =180g
180 G of water to be electrolyzed