Comparison of the effects of cation and phosphorus doping in cobalt-based spinel oxides towards the oxygen evolution reaction

Abstract

The sluggish kinetics of oxygen evolution reaction (OER) has become a hindrance for the development of clean and sustainable energy technology and calls for highly efficient electrocatalysts. Recently, heteroatom doping...

Cold plasma synthesis of phosphorus-doped CoFe2O4 with oxygen vacancies for enhanced OER activity

“…3d) exhibited binding energies at 129.5 eV and 133.3 eV attributed to metal phosphides and metal phosphates, respectively. 53,54 Combined with the XRD results, phosphorus was mainly doped into the spinel lattice as heteroatoms, and a small amount of metal phosphides were formed. The doping of the higher valence P also led to a decrease in the average valence state of the metal and the Co 2+ /Co 3+ and Fe 2+ /Fe 3+ of CoFe 2 O 4 -P significantly increased to 2 and 1.31, respectively.…”

Interfacial Electronic Modulation on Nickel Cobaltite/Black Phosphorus Heterostructures for Boosting the Electrocatalytic Oxygen Evolution Reaction

“…The energy crisis and environmental pollution are driving us to develop renewable and clean energy sources. Hydrogen has a greater advantage in overcoming energy anxiety in the future due to its cleanliness, non-pollution, and renewability . Currently, electrochemical water splitting is a promising technology for large-scale hydrogen production and is also one of the key strategies to deal with the current energy problem. , However, the anodic oxygen evolution reaction (OER) is sluggish in kinetics and has a high energy barrier in thermodynamics, which severely hinder the efficiency of electrochemical water splitting .…”

Investigation of Zn-Substituted FeCo2O4 for the Oxygen Evolution Reaction and Reaction Mechanism Monitoring through In Situ Near-Ambient-Pressure X-ray Photoelectron Spectroscopy

“…Replacing Zn 2+ ions with a cobalt-based spinel structure changes the electronic structure of and greatly alters the properties of FeCo 2 O 4 . − Due to its stable divalent state and low electronegativity, the Zn 2+ ion is considered a promising candidate for doping; it mainly occupies the “A” site or tetrahedral site in a spinel structure, increasing the number of cation vacancies . Some reports have revealed that the use of cation substitution in spinel materials has been discovered to lead to more electron transitions during the electrochemical reaction and higher electrochemical performance. − …”