Boosting the overall electrochemical water splitting performance of pentlandites through non-metallic heteroatom incorporation

Tailoring the electrocatalytic activity of multicomponent (Co,Fe,Ni)9S8−xSex pentlandite solid electrodes

“…21 Some synergistic phenomena related to the co-existence of randomly distributed cations should also be mentioned. 22 It has been theoretically 14,23 and experimentally 14,24 proven that by combining two or more cations (particularly from the Co, Fe, and Ni subgroup), the respective d-and p-band shi, and states near the Fermi level overlap, increasing the metallic character and affecting the electrocatalytic activity by improving charge-transfer abilities, HER activity, and increasing the electrochemically active surface area. On this basis, the addition of Fe or Ni may signicantly improve the activity of monometallic Co 9 S 8 , 14,20 while the Fe : Ni ratio in bimetallic pentlandites promotes changing the activity from HER to OER.…”

NiS/MoS2 Anchored Multiwall Carbon Nanotube Electrocatalyst for Hydrogen Generation and Energy Storage Applications

“…where the double layer capacitance (C dl ) was equal to the slope of the double layer charging current versus the scan rate slope using this formula i = vC dl . [50] ECSA was found to be 0.1815 cm 2 ,,0.717 cm 2 , 6.446 cm 2 and 7.356 cm 2 for NiS, MoS 2 , NiS/MoS 2 , or MWCNT/NiS/MoS 2 (Figure S1). Furthermore, we performed the electrochemical stability test of MWCNT/NiS/ MoS 2 at a current density of 10 mA/cm À 2 .…”

Silicon atom doping in heterotrimetallic sulfides for non-noble metal alkaline water electrolysis

“…30 To further improve the HER and OER performance of these materials, doping with non-metallic foreign elements such as nitrogen and phosphorus heteroatoms was shown as a viable strategy. 24,31…”