Novel Hydrothermally Synthesized Strontium Telluride Nanoballs as an Efficient Electrocatalyst for Oxygen Evolution Reaction

Abstract

The engineering of extremely e cient, low-cost, and stable electrocatalysts were required for the sluggish oxygen evolution reaction (OER). Herein, using hydrothermal technique, strontium telluride (SrTe/GC) nanoballs fabricated for water splitting to work e ciently as an e cient OER catalysts. According to physical and chemical characterizations, SrTe/GC nanoballs exhibits a three-dimensional form and homogeneous surface distribution, performing a low overpotential of 268 mV at 10 mA/cm 2 with small Tafel slope of 25 mV/dec. The fabricated material exhibits excellent stability of 24 hours with no decline in current density. The Te-induced metallic telluride and substantial covalency around the strontium center is responsible for this catalyst's outstanding performance. This study reveals the valuable insight of metal telluride materials to function as an extraordinarily e cient and stable OER catalysts at high current densities.

Electrochemical Performance Evaluation of Bimetallic Sulfide Nanocomposite with Fullerene (CeNdS/C60) for Efficient Oxygen Evolution Reaction (OER)

“…In this work, obtained potential is noted from voltammograms in reversible hydrogen electrode (RHE)-based scale after converting Ag/AgCl scale, according to the Nernst equation reported in the literature. , All the electrochemical tests were performed at room temperature in alkaline media (1.0 M KOH, pH 13.5) at a scan rate of 10 mV s –1 . All of the polarization curves in this study are iR -corrected potentials, , to eliminate the solution plus additional series resistance. Electrochemical tests such as CV, EIS, stability tests (i.e., CV cycling test, chronoamperometric test), and other electrochemical water splitting parameters such as overpotential (η), Tafel slope, turnover frequency (TOF), and electrochemical active surface area (ECSA) are performed using a computer-controlled AUTOLAB workstation.…”

Fabrication of vanadium telluride anchored on carbon nanotubes nanocomposite for overall water splitting

“…Tellurization may also lower redox potentials of TM, 31 because tellurium already has amazing qualities, which are further enhanced by its far stronger metallic features, which provide electrocatalysts a higher degree of electrical conductivity and, as a consequence, a higher level for OER performance 32 . Carbon‐based materials were good candidates to support electrochemical performance like carbon dots, graphene oxide, carbon nanospheres, and carbon nanotubes (CNTs) 33 . Among all, CNTs are best due to their unique dimensionality 34 .…”

“…Suo et al. have reported fabrication of vanadium‐doped cobalt nickel sulfide, which exhibits 40 mV/dec of Tafel slope that displays 210 mV of OP at 10 mA/cm 2 for overall water (H 2 O) splitting 36 . Lauren Liardet et al.…”

“…32 Carbon-based materials were good candidates to support electrochemical performance like carbon dots, graphene oxide, carbon nanospheres, and carbon nanotubes (CNTs). 33 Among all, CNTs are best due to their unique dimensionality. 34 On the other hand, CNTs are found to be active supports due to their unique structural characteristics, including electronic conductivity, flexible functional groups, and greater specific surface area, which permit selective interaction with the precursor complex of active component; moreover, CNT production has become an industrial process in current ages.…”

Dispersed CeOx Nanoflakes on Cu2SiO4 Nanosheets One-Step Deposition on Glassy Carbon for a Robust Energy Conversion System

“…Water splitting electrocatalysis, N 2 reduction, CO 2 reduction, and metal-air devices that can be recharged are the technologies being developed to meet the world’s growing “sustainable energy” needs. − Effective water splitting and various renewable energy conversion technologies involve the construction of active, stable, and earth-abundant electrocatalysts that can perform effectively in the same electrolyte for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). − IrO 2 or RuO 2 are now the most popular electrocatalysts for water splitting during the OER and HER because of their low overpotentials and quick kinetics. , However, these noble-metal-based electrocatalysts are not frequently used because of their scarcity and expensive cost. , Earth-abundant resources and inexpensive materials have been used in several initiatives and advancements toward efficient OER and HER electrocatalysts. − First-row transition-metal compounds have been considered the most intriguing possibilities among the many possible electrocatalysts accessible for water splitting because the electrocatalytic activity may be obtained by regulation of composition, tuning in the structure and tailoring on the surfaces of the material. − First-row transition-metal silicates (TMSs) are proposed as a unique class for potential OER electrocatalysts capable of operating in alkaline media. − The metal cations in the brucite-like layers of silicates could be programed, and the intercalated anions were simple to replace . Hence, inexpensive raw materials, a tunable shape, and an unchanging SiO 4 tetrahedral framework are all advantages of metal silicate. − All of these qualities favor boosting the electrochemical performance of the silicate-based electrode material.…”