Electrostatic Interaction-Directed Growth of Nickel Phosphate Single-Walled Nanotubes for High Performance Oxygen Evolution Reaction Catalysts.

A series of nickel phosphate single-walled nanotubes with controllable structure parameters are fabricated by utilizing alkali metal ions with the same charge number but different ion radii. Different electrostatic interactions between the cations and related growing intermediates are demonstrated to play a crucial role in controlling the growing process of nanotubes.