过电位
催化作用
析氧
钴
磁化
纳米团簇
材料科学
化学
掺杂剂
无机化学
磁场
纳米技术
物理化学
兴奋剂
电极
电化学
光电子学
生物化学
物理
量子力学
作者
Lamei Li,Wei Wang,Renat R. Nazmutdinov,Rustem Zairov,Qi Shao,Jianmei Lu
出处
期刊:Nano Letters
[American Chemical Society]
日期:2024-05-10
标识
DOI:10.1021/acs.nanolett.4c01623
摘要
Magnetic field mediated magnetic catalysts provide a powerful pathway for accelerating their sluggish kinetics toward the oxygen evolution reaction (OER) but remain great challenges in acidic media. The key obstacle comes from the production of an ordered magnetic domain catalyst in the harsh acidic OER. In this work, we form an induced local magnetic moment in the metallic Ir catalyst via the significant 3d–5d hybridization by introducing cobalt dopants. Interestingly, CoIr nanoclusters (NCs) exhibit an excellent magnetic field enhanced acidic OER activity, with the lowest overpotential of 220 mV at 10 mA cm–2 and s long-term stability of 120 h under a constant magnetic field (vs 260 mV/20 h without a magnetic field). The turnover frequency reaches 7.4 s–1 at 1.5 V (vs RHE), which is 3.0 times higher than that without magnetization. Density functional theory results show that CoIr NCs have a pronounced spin polarization intensity, which is preferable for OER enhancement.
科研通智能强力驱动
Strongly Powered by AbleSci AI