Facile synthesis of Fe/Ni bimetallic oxide solid-solution nanoparticles with superior electrocatalytic activity for oxygen evolution reaction
Facile synthesis of Fe/Ni bimetallic oxide solid-solution nanoparticles with superior electrocatalytic activity for oxygen evolution reaction
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轻松合成具有优异电催化析氧反应活性的铁/镍双金属氧化物固溶体纳米颗粒
DOI：
10.1007/s12274-015-0881-0
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发表时间：
2015-12-01
期刊：
影响因子：
9.9
通讯作者：
Geng, Baoyou
中科院分区：
文献类型：
--
作者：
Wang, Lingxiao;Geng, Jing;Geng, Baoyou
缓慢析氧反应（OER）是电化学水分解反应中重要的半反应。非晶态Fe/Ni复合氧化物具有高活性。在这项工作中，我们改进了气溶胶喷雾辅助方法，通过选择铁/镍乙酰丙酮酸盐代替无机盐作为原料，获得了尺寸约为20 nm的无定形铁-镍-氧化固溶体纳米颗粒（Fe-Ni-Ox-NPs）。采用扫描电镜（SEM）、透射电镜（TEM）、x射线衍射（XRD）、能量色散x射线能谱（EDX）和x射线光电子能谱（XPS）对Fe-Ni-Ox-NPs进行了表征。此外，电化学OER性能的研究表明，小尺寸的Fe-Ni-Ox-NPs比大尺寸的Fe-Ni-Ox-MPs具有更高的活性。为了获得50 mA/cm2的工作电流密度，需要0.315 V的小过电位，Tafel斜率低至38 mV/dec。
The sluggish oxygen evolution reaction (OER) is an important half-reaction of the electrochemical water-splitting reaction. Amorphous Fe/Ni composite oxides have high activity. In this work, we modified the aerosol spray-assisted approach and obtained amorphous Fe-Ni-Oxsolid-solution nanoparticles (Fe-Ni-Ox-NPs) approximately 20 nm in size by choosing iron/nickel acetylacetonates as raw materials instead of inorganic salts. The small-sized Fe-Ni-Ox-NPs were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) analysis, energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS). Furthermore, an investigation of electrochemical OER performance suggests that the small-sized Fe-Ni-Ox-NPs have higher activity than the large-sized Fe-Ni-Ox-MPs. A small overpotential of 0.315 V was demanded to obtain a working current density of 50 mA/cm2, and the Tafel slope was as low as 38 mV/dec.