Sulfur-Rich N-Doped Co₉S₈ Catalyst for Highly Efficient and Durable Overall Water Electrolysis Application

Figure 2

Comparative electrocatalytic (a) OER and (b) HER performance of the S,N-Co₉S₈ catalyst with previously reported metal-sulfide-based catalysts measured in a 1.0 M KOH electrolyte medium. The represents all of the overpotentials reported at 10 mA cm⁻². (c) XRD and (d) Raman spectra for the CoS, N-Co₉S₈, and S,N-Co₉S₈ catalyst electrodes.

(a)

(b)

(c)

(d)