Ni(ii)-doped anionic metal–organic framework nanowire arrays for enhancing the oxygen evolution reaction

Abstract

Herein, an anionic metal–organic framework nanowire array not only directly grew on Cu foam, but also captured Ni(II) ions at an ultra-small particle level. The hybrid material exhibited high activity with low overpotential (310 mV at 20 mA cm⁻² in 1.0 M KOH solution) toward the oxygen evolution reaction (OER) (1 M KOH), with performance comparable to that of the precious metal benchmark. These findings may expand the field of MOFs for scaled-up water electrolysis.