Monodisperse MxFe3鈥?i>xO4 (M = Fe, Cu, Co, Mn) Nanoparticles and Their Electrocatalysis for Oxygen Reduction Reaction

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• 作者：Huiyuan Zhu ; Sen Zhang ; Yu-Xi Huang ; Liheng Wu ; Shouheng Sun
• 刊名：Nano Letters
• 出版年：2013
• 出版时间：June 12, 2013
• 年：2013
• 卷：13
• 期：6
• 页码：2947-2951
• 全文大小：334K
• 年卷期：v.13,no.6(June 12, 2013)
• ISSN：1530-6992

文摘

Sub-10 nm nanoparticles (NPs) of M(II)-substituted magnetite M_xFe_3鈥?i>xO₄ (M_xFe_1鈥?i>xO鈥e₂O₃) (M = Mn, Fe, Co, Cu) were synthesized and studied as electrocatalysts for oxygen reduction reaction (ORR) in 0.1 M KOH solution. Loaded on commercial carbon support, these M_xFe_3鈥?i>xO₄ NPs showed the M(II)-dependent ORR catalytic activities with Mn_xFe_3鈥?i>xO₄ being the most active followed by Co_xFe_3鈥?i>xO₄, Cu_xFe_3鈥?i>xO₄, and Fe₃O₄. The ORR activity of the Mn_xFe_3鈥?i>xO₄ was further tuned by controlling x and MnFe₂O₄ NPs were found to be as efficient as the commercial Pt in catalyzing ORR. The MnFe₂O₄ NPs represent a new class of highly efficient non-Pt catalyst for ORR in alkaline media.

Keywords:

Ferrite nanoparticles; solution phase synthesis; electrocatalysis; oxygen reduction reaction