期刊
NANO RESEARCH
卷 8, 期 12, 页码 3815-3822出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-015-0881-0
关键词
Fe-Ni-O-x; solid solution; electrocatalysis; oxygen evolution reaction
类别
资金
- National Natural Science Foundation of China [21271009, 21471006]
- Doctoral Fund of the Ministry of Education of China [20123424110002]
- National Undergraduate Training Programs for Innovation and Entrepreneurship [201410370043]
- Programs for Science and Technology Development of Anhui Province [1501021019]
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-O (x) solid-solution nanoparticles (Fe-Ni-O (x) -NPs) approximately 20 nm in size by choosing iron/nickel acetylacetonates as raw materials instead of inorganic salts. The small-sized Fe-Ni-O (x) -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-O (x) -NPs have higher activity than the large-sized Fe-Ni-O (x) -MPs. A small overpotential of 0.315 V was demanded to obtain a working current density of 50 mA/cm(2), and the Tafel slope was as low as 38 mV/dec.
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