High efficient oxygen evolution using the nanocarbon containing-layered doublehydroxides

We report that carbon based, nickel-chromium Layered Double Hydroxide (NiCr-LDH) is a highly activeand stable oxygen evolution catalyst at neutral solutions. The LDHs were prepared using the co-precipitationmethod and were characterized by a field-emission scanning electron microscopy (FE-SEM), X-ray diffraction(XRD). According to powder X-ray diffraction and field emission scanning electron microscopy, NiCr-LDH exhibita nanosized plate-like morphology with a basal space (d۰۰۳) of ۷.۶۴ °A. Then amount of carbon nano tube at NiCr-LDH optimizes and the electrocatalytic activities of nanocomposite were studied toward water oxidation inneutral solutions. The obtained results show that the electrocatalytic activity of the carbon based NiCr-LDH ismuch better than that of the pure NiCr-LDH. The high electrocatalytic activity of nanocomposite may beattributed to the co-existence of carbon nano tube and improve the charge transfer. We have explored theelectrocatalytic behaviour towards water oxidation, demonstrating its efficient and persistent performance atneutral pHs.

کلیدواژه ها:

Layered double hydroxide ، CNT/NiCr-LDH ، Water oxidation ، Neutral solution