Concerted effect of Ni-in and S-out on ReS₂ nanostructures towards high-efficiency oxygen evolution reaction

Abstract

Herein, a one-step hydrothermal reaction is developed to synthesize Ni-doped ReS2 nanostructure with the sulphur defect. The material exhibited excellent OER activity with a current density of 10 mAcm-2 at...

Modulation of the Proportion of Mixed Metals in Spinel-Type Oxide NixCo3–xO4 (x = 0–1) Derived from a Metal–Organic Framework for Enhanced Oxygen Evolution Reaction

“…A rotating-ring-disk-electrode (RRDE) experiment was executed to validate the generation of oxygen bubbles from the NiCo 2 O 4 surface through the OER process. , A 1 M KOH solution was chosen to perform the experiment with a fixed rotation speed of 1600 to analyze the current change occurring at the ring electrode when a fixed potential of 1.5 V vs reversible hydrogen electrode (RHE) was applied at the disk electrode. The LSV curve for the oxygen reduction reaction (ORR) is provided in Figure a.…”

Recent Progress on the Performance of Zn-Ion Battery Using Various Electrolyte Salt and Solvent Concentrations

“…The highly soluble ZnCl 2 electrolyte based ZiB exhibits poor electrochemical performance due to the narrow anodic potential and Cl ― -ion instability. On the contrary, the NO 3 ― ion in Zn­(NO 3 ) 2 salt is a strong oxidizing agent which leads to cathode and anode corrosion. , The ZnSO 4 , Zn­(OTf) 2 and Zn­(TFSI) 2 aqueous electrolytes are the most stable aqueous electrolytes for ZiBs. , In addition, some functional asymmetric additives in aqueous electrolyte enhanced the ESW of ZiBs by forming an SEI on the electrode surface. , The WiS electrolyte enhanced the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) overpotential to a larger extent in aqueous electrolyte (Figure b). − With increasing the salt concentration, the availability of free water molecules is reduced in the primary solvation sheath. This is due to the fact that the bulky anion groups of Zn­(OTf) 2 and Zn­(TFSI) 2 salts are accumulated at the electrode interface forming a hydrophobic layer on the electrode surface that prevented electrode/water direct contact.…”

Highly Disordered Fe-Doped CeO2 with Oxygen Vacancies Facilitates Electrocatalytic Water Oxidation

“…Cation doping is a feasible approach to generate catalytic sites homogeneously and stably in catalysts without generating phase segregation. − In addition, the doping strategy benefits the incorporation of defects into catalysts, which is reported to enhance the electrocatalytic performance. − Specifically, the metal doping strategy can effectively create increased oxygen vacancies in CeO 2 as reported, − leading to weakly bound oxygen in adjacent locations, thus facilitating participation of lattice oxygen during the water oxidation process and favoring the lattice oxygen activation mechanism (LOM) . Therefore, metal doping provides the possibility for enhancing the OER performance of CeO 2 -based catalysts.…”