Postsynthetic treatment of nickel–iron layered double hydroxides for the optimum catalysis of the oxygen evolution reaction

Nickel-iron layered double hydroxide (NiFe LDH) platelets with high morphological regularity and sub-micrometre lateral dimensions were synthesized using a homogeneous precipitation technique for highly efficient catalysis of the oxygen evolution reaction (OER). Considering edge sites are point activity, efforts made to control platelet size within dispersions. The goal is controllably isolate characterize size-reduced NiFe LDH particles. Synthetic approaches have not been transferable based on published work other materials that reason, we instead use post-synthetic treatment techniques improve edge-site density. In end, reduced LDH/single-wall carbon nanotube (SWCNT) composites allowed further reduce OER overpotential 237 plus/minus 7 mV ( L = 0.16 0.01 micrometres, 20 wt% SWCNT), which one best values reported date. This approach as well improved long term activity catalyst in operating conditions.