Surface plasmon-driven photocatalytic activity of Ni@NiO/NiCO₃ core–shell nanostructures

Abstract

Surface plasmonic resonance enabled Ni@NiO/NiCO3 core–shell nanostructures as promising photocatalysts for hydrogen evolution under visible light.

Hydrothermal Synthesis of Ni3TeO6 and Cu3TeO6 Nanostructures for Magnetic and Photoconductivity Applications

“…The EELS spectra of the two selected nano-crystals of NTO (Figure a and Figure S.5a) and CTO (Figure b and Figure S.5b) correspond to spectroscopic signatures of O K, Te M, and Ni or Cu L edges, indicating the presence of oxygen, Te, nickel, or cooper elements. Moreover, in the NTO sample, a peak is visible in proximities of 856 and 873 eV, which may correspond to the Ni L 2,3 edge related to the presence of Ni 2+ in the NTO sample. , The oxygen K-edge EELS spectrum of the NTO sample shows a pre-edge feature centered at ∼530 eV, resulting from transitions to unoccupied 3d metal orbitals, which are hybridized with the O 2p orbital. , In the oxygen K-edge EELS spectrum is also observed a broader band in the 535–550 eV range. The spectral intensity above the pre-edge is associated with states that have an O 2p-hybridized character with unoccupied 4s and 4p metal orbitals and Te 5pd orbitals. , The CTO_H sample shows two peaks centered in 933 and 953 eV corresponding to the Cu L 2,3 edge due to the presence of Cu 2+ .…”

“…Moreover, in the NTO sample, a peak is visible in proximities of 856 and 873 eV, which may correspond to the Ni L 2,3 edge related to the presence of Ni 2+ in the NTO sample. 39 , 51 The oxygen K-edge EELS spectrum of the NTO sample shows a pre-edge feature centered at ∼530 eV, resulting from transitions to unoccupied 3d metal orbitals, which are hybridized with the O 2p orbital. 39 , 52 In the oxygen K-edge EELS spectrum is also observed a broader band in the 535–550 eV range.…”

Nickel nanoparticle-activated MoS2for efficient visible light photocatalytic hydrogen evolution

“…The pristine multilayer MoS 2 can barely split water, 36 while slightly enhanced HER abilities are found in the cases of Ag 40 Ni 60 and (MoS 2 ) 90 Ag 10 as a result of plasmon-resonance absorption. [37][38][39] Unlike the inert pristine MoS 2 and binary compounds, all the ternary composites possess good photocatalytic abilities. A maximum value of production efficiency is reached with the sample loaded with 10 wt% Ag and 6 wt% Ni.…”

Spectromicroscopic determinations of chemical environments of Ni in MoS2‐Ag‐Ni ternary systems

“…[10][11][12] Especially, Ni as an essential element, has been taken on an attractive prospect, because of the structural stability, facile preparation of Ni-based structure, and high performance of its metallic and compositional forms in photocatalysis. 13 For instance, catalytic performances of the nickel core-shell composites, arisen from surface plasmonic resonance, 14 were affected by the particle sizes and extrinsic treatments to change the shell structures. 15 Though the Ni-MoS 2 composites have been constructed by using the noble metals as nano-glues, 16,17 the effects of the Ni sizes on the electronic properties of the heterostructures remain elusive.…”