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Chemistry and Electrochemistry | Hydrogen

Encyclopedia of Electrochemical Power Sources, Page: 639-654
2025
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Book Chapter Description

The theme of the present concept is to summarize a brief history of hydrogen discovery, its electrolytic synthesis and use in fuel cells for electric power generation. The current status of hydrogen production and consumption, and future of hydrogen energy economy has been reviewed. The present chapter has incorporated the fundamental physicochemical properties of hydrogen, methods of its production, and the physical, adsorption, and chemical methods of its storage and transportation. A prior attention is focused on the materials being used as promising candidates for the physical and chemical storage of hydrogen. These include metal-hydrides and -nitrides, MOFs (metal organic frameworks), zeolites, carbon-based porous materials, etc. The content of the present chapter highlights about the most important electrochemical processes that involve hydrogen and the basic features of hydrogen adsorption and dissolution in metal matrices from both the gas phase and electrolyte solutions. The processes of the gas-phase and electrochemical hydrogenation of organic compounds are compared. Special attention is paid to peculiarities of electrochemical reactions of molecular hydrogen evolution and ionization. The methods for hydrogen sensor and detection in gas media as well as the contributions of chemistry and electrochemistry of hydrogen in the concept of hydrogen generation and consumption systems are briefly surveyed.

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