Probing the stoichiometry dependent catalytic activity of nickel selenide counter electrodes in the redox reaction of iodide/triiodide electrolyte in dye sensitized solar cells

Abstract

Nickel selenide (NixSey) systems have received much attention in recent years as potential low cost counter electrodes (CEs) in dye sensitized solar cells (DSSCs).

Oleic acid/oleylamine ligand pair: a versatile combination in the synthesis of colloidal nanoparticles

“…The sole use of OAm was mainly associated with thermodynamic-type growth in all directions, leading to the formation of spherical particles. 214…”

Recent Progress and Prospective of Nickel Selenide-Based Electrocatalysts for Water Splitting

“…Nickel selenide (Ni x Se y ) is a potentially commercialized catalyst of transition metal chalcogenides (TMDs) compounds, with a wide range of applications in the fields of HER, OER, and water splitting. − The outermost electron configuration of nickel is 3d 8 4s 2 with a rich valence and excellent chemical activities. , Since the energy levels of Se are close to the 3s and 3p orbitals, the 3d orbitals of Se might be involved in bonding with metal atoms, which contributes to more metallic properties of the transition metal selenides thus improving the electron transport. More importantly, due to the atomic ratios being able to be altered widely with their electronic properties, nickel and selenium can form a series of stoichiometric compounds (NiSe, NiSe 2 , Ni 3 Se 2 , Ni 3 Se 4 ) and nonstoichiometric compounds (Ni 0.85 Se).…”