Ammonia has been in the news because of its suitability as a hydrogen carrier and fuel, in addition to being a vital ingredient in fertiliser. Existing distribution networks and the ease of turning ammonia gas into a liquid make ammonia a cost-effective way to transport renewable energy. For a given volume, ammonia—a molecule made up of three hydrogen atoms and one nitrogen atom—carries about 50% more hydrogen atoms than hydrogen itself.
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Source: Phys.org