External Electric Field-Enhanced Fenton-Like Reactivity of Multiprincipal Element Alloy
Chaoyi Huang1,2,3, Xiao Liu2, Junxiu Wu4
1College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, Zhejiang 310027, China.
ACS Applied Materials & Interfaces
|June 25, 2025
Summary
Applying an external electric field (EEF) to multiprincipal element alloys (MPEAs) on carbon nanofibers significantly boosts catalytic degradation rates for peroxymonosulfate (PMS) reactions, enhancing stability and recyclability.
Area of Science:
- Materials Science
- Catalysis
- Environmental Chemistry
Background:
- Multiprincipal element alloys (MPEAs) show promise in heterogeneous catalysis due to their unique properties.
- MPEAs are recently being investigated for peroxymonosulfate (PMS)-based Fenton-like reactions.
- External electric fields (EEF) can enhance Fenton-like reactions by facilitating electron transfer to PMS.
Purpose of the Study:
- To synthesize MPEAs supported on carbon nanofibers (MPEA/CNFs).
- To investigate the effect of EEF on the catalytic performance of MPEA/CNFs in PMS-based Fenton-like reactions.
- To elucidate the reaction mechanism under EEF.
Main Methods:
- Synthesis of MPEA/CNFs.
- Catalytic degradation experiments with and without EEF.
- Analysis of degradation rates, metal leaching, and catalyst stability.
- Computational studies to understand the reaction mechanism.
Main Results:
- EEF application increased the degradation rate by 20-fold (k = 270.6 M-1·min-1) compared to the non-electrified system.
- Metal leaching was reduced approximately 10-fold, enhancing catalyst stability and recyclability.
- EEF induced in situ generation of hydrogen peroxide (H2O2) by the CNF substrate.
- Computational analysis revealed increased binding energy between PMS and MPEA (4.8 times) due to H2O2 adsorption, promoting electron transfer and a nonradical pathway.
Conclusions:
- EEF significantly enhances the catalytic efficiency and stability of MPEA/CNFs in PMS-based Fenton-like reactions.
- The enhanced performance is attributed to improved PMS activation via increased binding energy and facilitated electron transfer.
- This study provides crucial insights into applying MPEA catalysts in Fenton-like reactions under external electric fields.
Keywords:
and DFT calculationelectrochemical degradationfenton-like reactionhydrogen peroxidemultiprincipal element alloysperoxymonosulfate activationMore Related Videos
12:18Co-localizing Kelvin Probe Force Microscopy with Other Microscopies and Spectroscopies: Selected Applications in Corrosion Characterization of Alloys
Published on: June 27, 2022
2.8K
12:02Determination of Thermodynamic Properties of Alkaline Earth-liquid Metal Alloys Using the Electromotive Force Technique
Published on: November 3, 2017
13.3K
Related Concept Videos
02:58Crystal Field Theory - Octahedral Complexes
28.0K
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...
28.0K
03:02Colors and Magnetism
12.4K
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...
12.4K
02:42Valence Bond Theory
9.7K
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...
9.7K
02:58Properties of Transition Metals
27.4K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
27.4K
02:51Metal-Ligand Bonds
21.5K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
21.5K
01:19Complexation Equilibria: The Chelate Effect
683
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
683