Dynamic reconstruction of a pearl-thread-like CoS 2 –Cu x S interface for an enhanced oxygen evolution reaction

A developed self-supported CoS 2 –Cu x S/CF catalyst dynamically reconstructs into active CoOOH–CuO–Cu x S interface under OER conditions. It exhibits excellent activity and long-term stability (over 200 h) in alkaline solution, outperforming RuO 2 /CF.