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Graphene lets protons slip through: finding material's loophole offers promise for better fuel cells.
The world's thinnest material has a soft spot for protons.
Despite its impermeability to all atoms and molecules, the slim carbon film known as graphene allows protons to pass through it, new experiments reveal. The finding suggests that graphene and similar ultrathin materials can improve hydrogen fuel cells, which require a barrier that allows only protons to penetrate.
"It's great work and a very important result," says Vikas Berry, a chemical engineer at the University of...
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