Co-Ni layered double hydroxides for water oxidation in neutral electrolyte.
Co-Ni layered double hydroxides for water oxidation in neutral electrolyte.
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DOI：
10.1039/c3cp50202c
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发表时间：
2013-04
期刊：
影响因子：
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通讯作者：
Ye Zhang;B. Cui;Chunsong Zhao;Hong Lin;Jianbao Li
中科院分区：
文献类型：
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作者：
Ye Zhang;B. Cui;Chunsong Zhao;Hong Lin;Jianbao Li
The electrochemical properties of Co-Ni layered double hydroxides (LDHs) as efficient electrocatalysts for water oxidation were investigated in potassium phosphate electrolyte under neutral pH condition. The Co-Ni LDHs with a core-shell structure were fabricated using a facile route from a Co-Ni hydroxide precursor with iodine as a topotactic oxidizer. The unique core-shell morphology is likely due to the enrichment of Co(III) hydroxide in the inner core indicated by selected area electron diffraction and energy-dispersive spectroscopy. Through a self-assembling process at the organic/inorganic interface and dip-coating, the Co-Ni LDHs were deposited onto FTO glass substrates to prepare composite electrodes. Low over-potential and high current density was achieved in the oxygen evolution reaction. The excellent electrocatalytic activity of Co-Ni LDHs may be attributed to more accessible Co active sites and rapid movement of interlayer ions within their layered structure.
