Why can't we use hydroelectricity and water electrolysis to produce hydrogen as a fuel?

Basically, hydrogen is not the primary form of energy in modern society, and there aren't many places to use it. When the cost is high, few people naturally use it. on the one hand, the electricity transmission method is relatively mature and inexpensive. On the other hand, hydroelectric plants have more efficient energy storage measures during peak periods: when energy consumption is low, simply use the remaining electricity to pump water. But this does not mean that the production of hydrogen by electrolysis of water has no application: as an energy source with the same energy as oil. High-density substances can be used as clean energy to replace oil in places where electricity is not suitable, such as rockets. , planes, ships, etc.; Moreover, as an intermediate substance for energy storage, wind energy and lPhotovoltaic energy is used to electrolyze water to produce hydrogen, which then passes through a gas turbine. integration of the energy network. The problem with liquid hydrogen is that there is currently no particularly efficient and safe storage method. Large-scale storage still relies on low temperature and high pressure, which is not only expensive but also dangerous. in rocket engines. It is unacceptable for civil and commercial use. As a solution, solid-state storage of metal hydrides has sweet dreams and a cruel reality. It still belongs to the category of rare metals, and it is far from possible to have safe and efficient storage in the future, combined with wind energy. photovoltaic and The electrical energy provided by nuclear energy has decreased considerably, and it is very possible that hydrogen energy will replace pe energytrolley in certain regions.