Influence of Fe(III) doping on the crystal structure and properties of hydrothermally prepared β-Ni(OH) 2 nanostructures (CROSBI ID 250323)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Krehula, Stjepko ; Ristić, Mira ; Wu, Chuchu ; Li, Xuning ; Jiang, Luhua ; Wang, Junhu ; Sun, Gongquan ; Zhang, Tao ; Perović, Marija ; Bošković, Marko ; Antić, Bratislav ; Kratofil Krehula, Ljerka ; Kobzi, Balázs ; Kubuki, Shiro ; Musić, Svetozar
engleski
Influence of Fe(III) doping on the crystal structure and properties of hydrothermally prepared β-Ni(OH) 2 nanostructures
This paper systematically examines the influence of the level of Fe(III) doping on the crystal structure and other properties of Ni(OH)2. Reference β-Ni(OH)2 and Fe-doped Ni(OH)2 samples were synthesized by hydrothermal precipitation of mixed Ni(II) and Fe(III) nitrate aqueous solutions in a highly alkaline medium. The samples were investigated using X-ray powder diffraction (XRPD), scanning and transmission electron microscopy (FE-SEM and TEM), energy dispersive X-ray spectroscopy (EDS), Mössbauer spectroscopy, magnetic measurements, Fourier transform infrared (FT- IR) spectroscopy, ultraviolet–visible–near infrared (UV–Vis–NIR) spectroscopy, thermogravimetric analysis (TGA) and electrochemical measurements. Incorporation of Fe in β-Ni(OH)2 by cation substitution was confirmed from the shifts in position of XRPD lines due to the difference in the ionic radius of Fe3+ and Ni2+. The Fe3+-for-Ni2+ substitution in β-Ni(OH)2 caused formation of an interstratified structure with β-Ni(OH)2 and α-Ni(OH)2 structural units interconnected within the same structural layers and crystallites. Mössbauer spectra revealed the presence of Fe3+ ions in highly distorted octahedral sites, presumably at the boundary between the α-Ni(OH)2 and β-Ni(OH)2 structural units within the same structural layer. Electrochemical measurements showed significant increase in oxygen evolution reaction (OER) catalytic activity of Fe-doped Ni(OH)2 compared to pure phase.
Nickel hydroxide ; β-Ni(OH)2 ; Iron doping ; Interstratification ; Mössbauer spectroscopy ; OER catalyst
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Podaci o izdanju
750
2018.
687-695
objavljeno
0925-8388
1873-4669
10.1016/j.jallcom.2018.04.032
Povezanost rada
Kemija, Kemijsko inženjerstvo