David Roberts:

Hydrogen — the H of H2O fame — turns out to be something of an all-purpose element, a Swiss Army knife for energy. It can be produced without greenhouse gases. It is highly flammable, so it can be used as a combustion fuel. It can be fed into a fuel cell to produce electricity directly, without combustion, through an electrochemical process.

It can be stored and distributed as a gas or a liquid. It can be combined with CO2 to create other useful fuels like methane or ammonia. It can be used as a chemical input in a range of industrial processes, helping to make fertilizers, plastics, or pharmaceuticals.

It is quite handy.

And it is the most abundant chemical element in the universe, so you’d think we’d have all we need. Sadly, it’s not that easy.

It is expensive, in both money and energy, to pry hydrogen loose from other elements, store it, and convert it back to useful energy. The value we get out of it has never quite justified what we invest in producing it. It is one of those technologies that seems perpetually on the verge of a breakthrough, but never quite there.

Seattle native Evan Johnson thinks he can change that. He thinks he’s finally figured out how to unlock a hydrogen economy.