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Fabrication of Mn,N‐Codoped Carbon Electrocatalysts from a Cationic Cd(II)‐based MOF Involving Anion‐exchange with MnO 4 − Anions
Author(s) -
Yuan Jie,
Xiao Li,
Huang GaoYuan,
Yang JinMeng,
Zhu HaiBin
Publication year - 2020
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.202000397
Subject(s) - cationic polymerization , ion exchange , electrolyte , chemistry , inorganic chemistry , pyrolysis , electrochemistry , carbon fibers , amine gas treating , ion , materials science , electrode , polymer chemistry , organic chemistry , composite number , composite material
Mn and N‐codoped carbon materials (Mn−N−C) have recently aroused enormous interest owing to their unique advantages over Fe‐N−C counterparts. Mn−N−C electroactive materials have been conveniently fabricated from a cationic Cd(II)‐based MOF (Cd−TTPBA‐4(TTPBA‐4=N 1 ,N 1 ,N 4 ,N 4 ‐tetrakis(4‐(4H‐1,2,4‐triazol‐4‐yl)phenyl)benzene‐1,4‐di‐amine) which can effectively and controllably achieve the Mn‐doping through anion‐exchange between the exterior MnO 4 − anions and its exchangeable ClO 4 − anions. The anion‐exchanged materials of MnO 4 − @Cd−TTPBA‐4 were pyrolyzed at 1000 °C followed by acid‐washing and second heat‐treatment to give Mn−N−C electroactive materials with promising oxygen reduction activity. In the alkaline electrolyte, the optimal Mn−N−C material exhibits an outstanding oxygen reduction activity with the onset potential of 0.93 V (vs RHE) and half‐wave potential of 0.82 V (vs RHE), together with a good long‐term stability.