Iron-modulated Ni₃S₂derived from a Ni-MOF-based Prussian blue analogue for a highly efficient oxygen evolution reaction

Abstract

Developing efficient, environmental-friendly and cost effective non-precious metal electrocatalysts for oxygen evolution reactions (OER) is essential to alleviate the energy crisis and environmental pollution. Herein, we report a simple and...

Co(OH)2 nanosheets decorated with La-CoP nanorod array for alkaline electrocatalytic hydrogen evolution reaction

“…Fig. 6c shows the C dl values obtained by linear calculation of CV, 46 the C dl values of La-CoP/Co(OH) 2 /NF, La-CoP/NF, and La-Co(OH) 2 /NF were 12.75 mF cm −2 , 10.29 mF cm −2 , and 7.94 mF cm −2 , respectively. The larger the calculated C dl value, the larger the electrochemically active surface area (ECSA), which is beneficial as it exposes the active sites and increases the effective active sites.…”

Bimetallic sulfide/N-doped carbon composite derived from Prussian blue analogues/cellulose nanofibers film toward enhanced oxygen evolution reaction

“…Nevertheless, the electroconductivity and stability of the derivatives obtained from PBA NPs are not satisfactory at present and so these usually need hybridizing with another conductive matrix, like nickel foam (NF), carbon nanotubes (CNTs), or graphene. Yang et al fabricated Fe-Ni 3 S 2 /NF through a hydrothermal method using Ni-MOF@PBA/NF as a precursor, which exhibited an overpotential of 232 mV at 10 mA cm −2 and stability of 24 h. 22 Ma's group synthesized a S-CoFe/CNTs catalyst by a gas-phase sulfidation of CoFe-PBA/CNTs, which displayed an overpotential of 258 mV at 10 mA cm −2 and stability of 23 h. 23 The growth of the catalyst on NF elevated the electroconductivity and activity, yet the intrinsic activity of the catalyst was not reflected in this system, while the CNTs or graphene have high cost and are prone to aggregate. 19 Therefore, exploiting structures with less aggregation, more exposed active sites, and good durability would be of significance.…”

Cobalt incorporation and MoS2–NiS2 heterostructure synergistic for improving full water electrolysis efficiency

“…18 The elemental doping strategy is also believed to be a valid way to speed up the catalytic process in water splitting, by which the electronic structures of TMS catalysts may be tuned, along with the introduction of additional active site-improved conductivity and a reduced dynamic energy barrier of H 2 O dissociation. [19][20][21][22][23] Cobalt incorporation into TMSs with enhanced catalytic performances has been specially reported; the reasons are as follows: the proper amount of cobalt incorporation into MoS 2 could increase its electrical conductivity, 24,25 the hydrogen adsorption and desorption energy of MoS 2 site could be optimized with cobalt doping, 26 and the electronic configuration was tailored by introducing cobalt into NiS 2 . 27 Thus, the electrocatalytic performance of MoS 2 or NiS 2 could be enhanced, and hydrogen production would consequently be accelerated.…”