A Highly Active CoFe Layered Double Hydroxide for Water Splitting

作者：Feng, Lanxiang; Li, Airong^*; Li, Yuxuan; Liu, Jia; Wang, Leidanyang; Huang, Lieyuan; Wang, Yong; Ge, Xingbo^*

来源：ChemPlusChem, 2017, 82(3): 483-488.

DOI：10.1002/cplu.201700005

• 3D electrodes
• ion precursors
• layered double
• hydroxides
• oxygen evolution reaction
• water splitting

Highly active, cost-effective, and durable catalysts for oxygen evolution reaction (OER) are required in energy conversion and storage processes. A facile synthesis of CoFe layered double hydroxide (CoFe LDH) is reported as a highly active and stable oxygen evolution catalyst. By varying the concentration of the metal ion precursor, the Co/Fe ratios of LDH products can be tuned from 0.5 to 7.4. The structure and electrocatalytic activity of the obtained catalysts were found to show a strong de-pendence on the Co/Fe ratios. The Co2Fe1 LDH sample exhibited the best electrocatalytic performance for OER with an onset potential of 1.52 V (vs. the reversible hydrogen electrode, RHE) and a Tafel slope of 83 mVdec(-1). The Co(2)Fe1 LDH was further loaded onto a Ni foam (NF) substrate to form a 3D porous architecture electrode, offering a long-term current density of 100 mAcm(-2) at 1.65 V (vs. RHE) towards the OER.

• 出版日期2017-3
• 单位西南石油大学