Hydrogen fuel cells are emerging as key players in the clean energy landscape of the future, except for one problem: it takes lots of energy to make hydrogen, and in the US, the preferred source of that energy is natural gas.
Photoelectrochemical cells (PECs) use solar energy to split water molecules into hydrogen and oxygen. They don’t produce electricity directly like photovoltaic cells do, but they could have a huge impact on the electric vehicle market by providing a path to cost-competitive fuel cells. That in turn would give the auto industry a low-cost, high-mileage alternative to conventional EV batteries.
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