Related Experiment Video
Updated: Jun 16, 2025
06:44
Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
Published on: June 9, 2023
3.1K
Modulating electronic structure of cobalt silicate by iron-doping ensuring the boosted oxygen evolution reaction
Xianfang Tan1, Chongtao Ding2, Yang Wang2
1Hubei Key Laboratory of Radiation Chemistry and Functional Materials, School of Nuclear Technology and Chemistry & Biology, Hubei University of Science and Technology, Xianning 437100, PR China.
Journal of Colloid and Interface Science
|June 13, 2025
Summary
Iron doping enhances cobalt silicate catalysts for efficient oxygen evolution reactions. This strategy significantly reduces overpotential, paving the way for advanced renewable energy technologies.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Developing cost-effective, high-efficiency oxygen evolution reaction (OER) catalysts is crucial for renewable energy.
- Cobalt silicate (CoSi) shows promise but is limited by high overpotential.
Purpose of the Study:
- To engineer cobalt silicate (CoSi) catalysts for improved OER performance using iron (Fe) doping.
- To investigate the structural and electronic effects of Fe doping on CoSi catalysts.
Main Methods:
- Hydrothermal synthesis to create iron-doped cobalt silicate (CoSi-Fe) hollow spheres.
- Comprehensive material characterization techniques.
- Density functional theory (DFT) calculations to understand reaction mechanisms.
Main Results:
- Fe doping created hollow spherical CoSi-Fe catalysts with increased active sites and improved structural stability.
- Fe incorporation enhanced the activity of Co/Fe dual sites and optimized reaction kinetics.
- The optimized CoSi-Fe-3 catalyst achieved an overpotential of 289 mV at 10 mA cm⁻², a significant reduction from pristine CoSi.
Conclusions:
- Fe doping is an effective strategy for enhancing the OER performance of cobalt silicate catalysts.
- The developed CoSi-Fe catalysts offer superior performance compared to many reported metal silicates.
- This research provides insights for designing advanced silicate-based electrocatalysts for energy conversion.
Keywords:
Cobalt silicateDensity function theoryElectrocatalystHollow spheresIron-dopingOxygen evolution reactionMore Related Videos
09:34Synthesis and Characterization of Fe-doped Aluminosilicate Nanotubes with Enhanced Electron Conductive Properties
Published on: November 15, 2016
9.2K
06:53Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
1.9K
Related Concept Videos
02:58Crystal Field Theory - Octahedral Complexes
26.3K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.3K
02:34Structural Isomerism
19.1K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
19.1K
03:02Colors and Magnetism
11.6K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
11.6K
01:31Ferromagnetism
2.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.4K
02:32Bonding in Metals
47.0K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
47.0K
02:42Valence Bond Theory
8.5K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.5K