标题 |
Stabilizing Lattice Oxygen through Mn Doping in NiCo2O4-δ Spinel Electrocatalysts for Efficient and Durable Acid Oxygen Evolution
NiCo2O4-δ尖晶石电催化剂中Mn掺杂稳定晶格氧以实现高效持久的酸性析氧
相关领域
尖晶石
过电位
析氧
氧气
兴奋剂
密度泛函理论
材料科学
八面体
锰
无机化学
结晶学
化学
计算化学
物理化学
晶体结构
冶金
电化学
光电子学
电极
有机化学
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其它 | Design the electrocatalysts without noble metal is still a challenge for oxygen evolution reaction (OER) in acid media. Herein, we reported the manganese (Mn) doping method to decrease the concentration of oxygen vacancy (VO) and form the Mn−O structure adjacent octahedral sites in spinel NiCo2O4-δ (NiMn1.5Co3O4-δ), which highly enhanced the activity and stability of spinel NiCo2O4-δ with a low overpotential (η) of 280 mV at j=10 mA cm−2 and long-term stability of 80 h in acid media. The isotopic labelling experiment based on differential electrochemical mass spectrometry (DEMS) clearly demonstrated the lattice oxygen in NiMn1.5Co3O4-δ is more stable due to strong Mn−O bond and shows synergetic adsorbate evolution mechanism (SAEM) for acid OER. |
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