Specific forms of nitrogen doping can endow carbon-based metal-free materials with electrocatalytic activity. Now, introducing sp-hybridized nitrogen atoms into some acetylenic sites of ultra-thin graphdiyne — a highly π-conjugated lamellar carbon allotrope — has led to excellent oxygen reduction reaction activity.
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Zheng, Y., Qiao, SZ. N-doping goes sp-hybridized. Nature Chem 10, 900–902 (2018). https://doi.org/10.1038/s41557-018-0129-1
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DOI: https://doi.org/10.1038/s41557-018-0129-1