Cdo/Co3o4 Nanocomposite as an Efficient Electrocatalyst for Oxygen Evolution Reaction in Alkaline Media

Abstract

Electrochemical water splitting is one of the promising way to enhance energy with less outflow. In this regard different electrocatalysts have been reported for Oxygen evolution reaction (OER) to get alternative of noble metal based electrocatalysts. In this work, we have introduced Cadmium-oxide/Cobalt-oxide (CdO/Co3O4) nanocomposite by co-precipitation chemical strategy with impressive OER performance in alkaline medium. Almost 310 mV overpotential value is required to achieve 10 mA/cm2 current density with Tafel slope value of 62 mV/Dec. The as synthesized nanocomposite has stability of 6h as its longer electrochemical performance

One-pot synthesis of crystalline structure: Nickel-iron phosphide and selenide for hydrogen production in alkaline water splitting

“…It can be seen that the constructed Ni-Fe-P-Se has an activity for HER with a lower overpotential value of 316 mV at 10 mA cm -2 as compared to other electrocatalysts (Ni-P-Se and Fe-P-Se) with overpotential values of 385 and 458 mV, respectively. Tafel slope has always been a crucial analysis tool in HER reaction kinetics for the determination of the rate-determining step [36][37][38]. The Tafel slope value of Ni-Fe-P-Se was calculated as 89 mV dec -1 , which is significantly lower than for the other two prepared electrocatalysts, computed as 162 and 138 mV dec -1 for Ni-P-Se and Fe-P-Se, respectively.…”

Transition metal-based electrocatalysts for alkaline overall water splitting: advancements, challenges, and perspectives

“…This journal is © The Royal Society of Chemistry 2024 Overpotential (Z) = Onset potential (E RHE ) V À 1.23 V (for the OER) Moreover, the Tafel slope can be calculated by utilizing the Tafel equation: 62 Z = b log j + a where Z, b, and j indicate the overpotential, Tafel slope, and current density, respectively. 63 Another crucial quantity that may be calculated using the Tafel equation is the exchange current density when it equals zero. It reveals the material's inherent activity in the electrolyte at the reversible potential and shows the rate at which electrons migrate from the electrode to the electrolyte.…”

In-situ growth of nonstoichiometric CrO0.87 and Co3O4 hybrid system for the enhanced electrocatalytic water splitting in alkaline media

“…As a result of their enhanced electrocatalytic properties, metal oxides (Co, Ni, Mn, Mg, and Fe, for example) tend to be preferred among these catalysts [39][40][41][42][43]. The cobalt based electrocatalyst including Co3O4 [44], Co3O4-P [45], Ni-Co3O4 [46], Mg-Co3O4 [47], CdO-Co3O4 [48], Fe3O4/Co3O4 [49], and MgO@Co3O4 [50] etc. are widely reported owing to their significant corrosion resistance in alkaline media, high active sites and cost effective fabrication process [51,52].…”