Chen Feng, Huang Gao-Yuan, Wang Ke-An, Zhu Hai-Bin
School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China.
Inorg Chem. 2022 Nov 21;61(46):18759-18768. doi: 10.1021/acs.inorgchem.2c03295. Epub 2022 Nov 4.
Mn-N-C materials have received increasing interest in recent years because of their low Fenton reactivity and ORR activity comparable to those of their Fe-N-C and Co-N-C counterparts. In this contribution, an atomically dispersed Mn-N-C electrocatalyst with a prominent oxygen reduction performance was constructed by employing a cationic Cd-MOF as a precursor that can facilely and accurately introduce MnO anions through anion exchange. The best-performing Mn-N-C catalyst displays a 0.96 V (vs RHE) (onset potential) and a 0.87 V (vs RHE) (half-wave potential) in an alkaline solution, which exceed those of the benchmark Pt/C catalyst. In particular, the maximal power density of the self-made zinc-air battery reaches 200 mW·cm, surpassing that of most reported Mn-N-C materials.
