Tailoring the d-band center of porous CoS₂ nanospheres via low-electronegative Fe for weakened OH* adsorption and boosted oxygen evolution

Abstract

The development of high-performance metallic cobalt pyrite OER catalysts with suitable electronic structures remains a challenge. In this paper, a low-electronegative Fe substituted cobalt pyrite (FexCo1-x)S2 OER catalyst with controllable...

The interaction of carbon nanotubes (CNTs) with CuCoO2 nanosheets promotes structural modification and enhances their OER performance

“…Therefore, the introduction of CNTs changes the electronic structure and there are more carriers attached to the Fermi level, which is beneficial for the reduction of the electron transfer barrier. 75 The effect of CNTs on the band gap of CuCoO 2 was further verified by ultraviolet-visible-near infrared (UV-vis-NIR) absorption spectra (Fig. S22a†).…”

Heterostructure CoS2/MoS2 Nanosheets as a Dual-Active Electrocatalyst for the Oxygen Evolution Reaction

“…That is, the bimetallic heterostructure CoS 2 /MoS 2 nanosheets covered on CC can elevate the oxygen evolution activity of electrocatalysts. The electrochemical active surface area (ECSA) of the electrocatalyst, which was linearly related to the electrochemical double-layer capacitance (C dl ), 64 was then measured using the cyclic voltammetry (CV) curves under varied scan rates (Figure S5). As illustrated in Figure 4d, the CC, CC@ZIF-67, CC@MoS 2 , CC@RuO 2 , CC@CoS 2 , and CC@CoS 2 /MoS 2 respectively show C dl values of 1.33, 2.05, 2.24, 2.25, 2.46, and 2.57 mF cm −2 , verifying that CC@CoS 2 /MoS 2 can provide more surface catalytic active sites in the OER.…”

Boron-doped NiCoP nanoarrays with wrinkles grown on carbon cloth for hybrid supercapacitor applications

“…The boron possesses a lower electronegativity (2.04) than phosphorus (2.19), which can induce charge accumulation at the Ni and Co sites, facilitating redox reactions and improving the pseudocapacitive contribution. 16 Furthermore, the smaller atomic radius of boron (0.85 Å) compared to phosphorus (1.00 Å) enables facile doping into the NiCoP lattice. In addition, the defect formation energies calculated using DFT for substitutional and interstitial doping of boron into NiCoP are displayed in Fig.…”