Boosting Electrocatalytic Water Oxidation by Creating Defects and Lattice‐Oxygen Active Sites on Ni‐Fe Nanosheets

• DOI: 10.1002/cssc.202001362
• Publication Date: 2020-07-15T05:55:14Z
• Authors: Chi Chen; Peili Zhang; Mei Wang; Dehua Zheng; Junchi Chen; Fusheng Li; Xiujuan Wu; Ke Fan; Licheng Sun
• Keywords: Overpotential; Oxygen evolution; Layered double hydroxides

Layered nickel-iron oxide/hydroxide nanosheets have proven to be the most efficient catalyst for water oxidation reaction. Introducing structural defects is a particularly attractive method increasing number of active sites and tailoring intrinsic electronic properties. Herein, were introduced on Ni-Fe through sequentially electrodoping dedoping surface material with tetramethylammonium ions. The as-prepared defect-rich showed an enhanced catalytic performance oxygen evolution reaction (OER) compared conventional NiFe layered double hydroxides (LDHs), exhibiting overpotential only 172 mV at current density 10 mA cm-2 . relationship between pH OER activity indicated that lattice oxygens participated in process as sites. This work provides new insights into understanding structure-activity materials helps develop methods implement such frameworks aided by organic molecules.