Lithium–oxygen batteries have received much research attention, and the issue of high overpotential of lithium–oxygen batteries is pivotal to be resolved. Developing efficient electrocatalysts is considered to be a feasible way. Here, we prepared Co and N co-doped carbon material from ZIF-8 via a two-step route, in which Co is atomically dispersed into the ZIF-8-derived N-doped carbon matrix. This obtained single atom Co–N–C catalyst was applied as an efficient catalyst for the lithium–oxygen battery. The Co–N–C cathode lithium–oxygen battery can deliver a high platform of 2.7 V during discharge, and the charging platform is below 4 V. Co-N-doped carbon can improve the work function of the carbon material, effectively reduce overpotential of both oxygen reduction reaction and oxygen evolution reaction, and thus improve the performance of the lithium–oxygen battery.

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The reaction of uridine 3'-phosphate with benzoylimidazole in the absence and presence of a strong base was followed up by 31P and 1H nmr as well as paper electrophoresis. Possible reaction courses were proposed, the reaction rate constants were calculated and the reaction mechanism was discussed. It is possible to selectively acylate ribonucleotides with benzoylimidazole by appropriate choice of the base used.