An Alkaline Stable, Metal Hydroxide Mimicking Metal Organic Framework for Efficient Electrocatalytic Oxygen Evolution.
Postsynthetic ion exchange of [Co2(m Cl)2(btta) (MAF X27 Cl, H2bbta =1H,5H benzo(1,2 d:4,5 d')bistriazole) possessing open metal sites on its pore surface yields a material [Co2(m OH)2(bbta) (MAF X27 OH) functionalized by both open metal sites and hydroxide ligands, giving drastically improved electrocatalytic activities for the oxygen evolution reaction (an overpotential of 292 mV at 10.0 mA cm( 2) in 1.0 M KOH solution) Isotope tracing experiments further confirm that the hydroxide ligands are involved in the OER process to provide a low energy intraframework coupling pathway.
Journal of the American Chemical Society