Journal: Advanced Materials
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Doped graphene could catalyse renewable energy developments
A low-temperature way to make porous nitrogen-doped graphene, which could have applications from next-generation batteries to carbon-free fuels, has
Many promising renewable-energy applications, including fuel cells and metal–air batteries, rely on splitting molecular oxygen (O2). Hydrogen fuel cells, for example, combine hydrogen and oxygen to release electricity, producing water as the by-product. But until now, highly active oxygen reduction reaction (ORR) catalysts have required platinum, a rare and expensive metal.
AIMR researchers have now produced a high-performance ORR catalyst from inexpensive, earth-abundant elements carbon and nitrogen. They developed a low-temperature, nickel-based method for growing porous, single-atom-thick carbon sheets called graphene. To improve its
When the team tested their material as an electrode for a zinc–air battery, it showed comparable performance to a platinum-based electrode and a higher durability.
- Advanced Materials 30, 1803588 (2018). doi: 10.1002/adma.201803588