锰
氧还原反应
中心(范畴论)
还原(数学)
自旋(空气动力学)
氧气
原子氧
材料科学
化学
物理
冶金
物理化学
结晶学
几何学
数学
电极
电化学
热力学
有机化学
作者
Jincheng Zhang,Fuhua Li,Haibo Liu,Qilun Wang,Xuning Li,Sung‐Fu Hung,Hongbin Yang,Bin Liu
标识
DOI:10.1002/anie.202412245
摘要
Single atom catalysts (SACs) are promising non‐precious catalysts for oxygen reduction reaction (ORR). Unfortunately, the ORR SACs usually suffer from unsatisfactory activity and in particular poor stability. Herein, we report atomically dispersed manganese (Mn) embedded on nitrogen and sulfur co‐doped graphene as an efficient and robust electrocatalyst for ORR in alkaline electrolyte, realizing a half‐wave potential (E1/2) of 0.883 V vs. reversible hydrogen electrode (RHE) with negligible activity degradation after 40,000 cyclic voltammetry (CV) cycles in 0.1 M KOH. Introducing sulfur (S) to form Mn‐S coordination changes the spin state of single Mn atom from high‐spin to low‐spin, which effectively optimizes the oxygen intermediates adsorption over the single Mn atomic sites and thus greatly improves the ORR activity.
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