Interface engineered Ni3Se2/Ni3S2/NF heterostructure as a highly efficient electrocatalyst for robust oxygen evolution reaction

Interface Enables Faster Surface Reconstruction in a Heterostructured CuSey/NiSex Electrocatalyst for Realizing Urea Oxidation

“…Notably, the Ni 2p peaks in CuSe y /NiSe x /NF exhibit a negative shift of approximately 0.19 eV compared to those NiSe x /NF, indicating that the introduction of CuSe y modulates the electronic structure of NiSe x , causing the electron density around the nickel to increase. In the Cu 2p of CuSe y /NiSe x /NF (Figure c), the prominent peaks positioned at 951.92 and 933.32 eV are ascribed to the 2p 1/2 and 2p 3/2 of Cu + , while weaker peaks at 953.45 and 933.71 eV correspond to 2p 1/2 and 2p 3/2 of Cu 2+ , respectively. , Furthermore, the XPS spectrum of Se 3d in CuSe y /NiSe x /NF (Figure d) shows two peaks at 55.35 and 54.49 eV corresponding to Se 3d 3/2 and Se 3d 5/2 of M–Se (M = Ni, Cu), while the other weak peak at 58.64 eV is appointed to the SeO x . , Similarly, the Se 3d 3/2 peaks in CuSe y /NiSe x /NF exhibit a positive shift of 0.05 eV compared to those observed in NiSe x /NF, implying a potential electron transfer from CuSe y to NiSe x across the interface. , Such interfacial interactions induce alterations in electron distribution at the interface, thereby enhancing the electrocatalytic performance. , …”

“…29,30 Such interfacial interactions induce alterations in electron distribution at the interface, thereby enhancing the electrocatalytic performance. 31,32 The UOR performance of the CuSe y /NiSe x /NF electrode was examined in an alkaline electrolyte solution containing varying concentrations of urea. The current density of the catalyst exhibits a gradual increase within the lower concentration range across the applied voltage range, peaking at a 0.33 M urea concentration (Figure S5a).…”

Heterostructured electrocatalysts for the oxygen evolution reaction

“…In addition, in addition to rGO's high conductivity, the synergistic effect of two components makes the overall electrochemical activity of the catalyst better. Lin et al 159 synthesized Ni 3 Se 2 /Ni 3 S 2 heterostructures on NF by hydrothermal and solvothermal methods for the basic OER. As shown in Fig.…”

Multi-interface engineering of NiS/Ni3S2/Fe3O4 nanoarchitectures for use as high-efficiency electrocatalysts toward the oxygen evolution reaction

“…27 Therefore, the rational construction of heterogeneous interfaces is a promising approach for adjusting electron distribution, creating rich active sites, and optimizing the catalyst's chemisorption ability, resulting in exceptional efficiency for water decomposition. 28–30…”