期刊
NEW JOURNAL OF CHEMISTRY
卷 47, 期 47, 页码 21648-21653出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d3nj04108e
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The newly synthesized mononuclear cobalt complex 1 can serve as a molecular catalyst for the oxygen reduction reaction (ORR), achieving high H2O2 yield. The formation of a cobalt (III)-peroxo species is responsible for the O2 reduction reaction.
1,4,7,10-Tetraazacyclododecane (L) reacts with CoCl2 to provide a mononuclear cobalt complex, [Co(L)(Cl)(2)]Cl 1, which has been determined by X-ray crystallography. Complex 1 can serve as a new molecular catalyst for the oxygen reduction reaction (ORR). Under -0.4 V, the H2O2 yield is almost 100% with 0.20 M KOH. Investigations show that the formation of a cobalt(iii)-peroxo species, [L-Co-OO](+) in solution is responsible for O-2 reduction. In particular, this cobalt(iii)-peroxo species has been isolated from the electrocatalytic system as a binuclear cobalt complex, [Co(L)(mu-OH) (mu-OO)Co(L)](ClO4)(4)2 in the solid state. We hope that these findings can provide a new ideal for the development of electrocatalysts for the ORR.
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