Hydrogen offers many benefits as a renewable and sustainable fuel of the future as its combustion emits only water. The main problem to now is that it must be stored as a gas, which is potentially dangerous for everyday use, and it can only be stored as a liquid under cryogenic conditions. Now there may be another alternative. Chemists in the US have developed a simple reaction to make ammonia borane (AB) – a powder more hydrogen-dense than even liquid hydrogen. AB is a stable white powder which releases hydrogen gas upon heating. Its use as a hydrogen storage material has been hampered by difficulties in making the powder in reasonable yield, but the new research further increases its promise.
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