Researchers have succeeded in making hydrogen directly from seawater in a process that uses cheap, plentiful catalysts like cobalt oxide with chromium oxide on its surface as the catalyst.
There is a lot of water in the world, but only 2.5% of it is fresh. People are fascinated by the idea of making hydrogen by passing an electric current through water to split it into its components — hydrogen and oxygen. When they think of all the water in the oceans of the world, they see a virtually unlimited supply of hydrogen just waiting to be unlocked from its watery bonds.
. Fellow co-leader Yao Zheng added, “Our work provides a solution to directly utilize seawater without pre-treatment systems and alkali addition, which shows similar performance as that of existing metal-based mature pure water electrolyzer.”readers like to read the details of research like this rather than flowery press releases, so here is the abstract of the study. The rest is behind a paywall.
Seawater electrolysis is still in early development compared with pure water electrolysis because of electrode side reactions, and corrosion arising from the complexities of using seawater. Hydrogen is tricky stuff, however. The most reactive of all the elements, it is difficult to contain and transport. That’s where— a molecule made up of hydrogen and nitrogen atoms — comes into play. Ammonia can be transported quite conveniently and inexpensively via existing pipelines and cargo ships. In fact, it can be used as a “green” fuel for those very same vessels and help lower carbon emissions from shipping while transporting green ammonia to foreign markets.
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