Construction of Hierarchical Porous Architecture on Ni Foam for Efficient Oxygen Evolution Reaction Electrode

Nickel foam (NF) with a three-dimensional porous structure plays an important role in wide variety of applications such as energy storage and conversion, catalysis, sensor due to its high porosity, low density, excellent conductivity. However, the main drawback NF is that ligaments are very smooth, thus surface area relatively low. In this work, we propose novel strategy, oxidization reduction process, situ construct micron/nano pores on commercial fabricate typical hierarchical architecture. This process simple green, avoiding use sacrificial materials. Furthermore, MnO 2 coated micron/nano-porous Ni (MPNF) oxygen evolution reaction (OER) electrode through pulse electrodeposition. The designed MPNF-MnO presents enhanced OER electrocatalysis activity overpotential 363.5 mV at current density 10 mA cm ?2 alkaline solution, which 66.4 lower than NF-MnO same operating conditions. wrinkled structures MPNF also improve mechanical integrity electrode, resulting super-long stability.