Related Experiment Video
Updated: May 24, 2025
07:50
Hydrogen Charging of Aluminum using Friction in Water
Published on: January 28, 2020
5.9K
Triggering Intrinsic Electrochemical Hydrogen Evolution Activity within Heusler Alloys via Electronegativity-Induced
Tianchen Jin1,2, Shijie Shen2, Aijiao Xu2
1Key Laboratory of Optical Field Manipulation of Zhejiang Province, Department of Physics, Zhejiang Sci-Tech University, Hangzhou, 310018, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|March 3, 2025
Summary
Researchers enhanced Heusler alloy catalysts for the electrochemical hydrogen evolution reaction (HER) by substituting manganese with ruthenium. This modification significantly reduced the overpotential, improving catalytic efficiency for hydrogen production.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Heusler alloys are investigated for hydrogen evolution reaction (HER) due to unique structures.
- Half-metallic nature of Heusler alloys limits their catalytic application.
- Tuning electronic structure is key to improving HER activity.
Purpose of the Study:
- To modulate the electronic structure of Fe2MnSi Heusler alloy for enhanced HER.
- To investigate the effect of substituting Mn with Ru on catalytic properties.
- To optimize hydrogen adsorption energy for efficient catalysis.
Main Methods:
- Arc melting technique used for material synthesis.
- Preparation of Fe2MnxRu1-xSi alloy series.
- Electrochemical characterization to evaluate HER performance.
Main Results:
- Incorporation of Ru created electronegativity gradients and electron enrichment.
- Electronic modulation enhanced conductivity and optimized the d-band center.
- Overpotential reduced from 525 mV to 19 mV at 10 mA cm-2 in acidic media.
Conclusions:
- Ruthenium substitution in Fe2MnSi Heusler alloys significantly boosts HER performance.
- Electronic structure tuning via alloying is an effective strategy for catalyst design.
- Developed catalysts show promise for efficient electrocatalysis and hydrogen production.
More Related Videos
![Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F55858.jpg&w=3840&q=50)
Related Concept Videos
01:30Ladder Diagrams: Redox Equilibria
414
Ladder diagrams are useful tools for understanding redox equilibrium reactions, especially the effects of concentration changes on the electrochemical potential of the reaction. The vertical axis in the redox ladder diagrams represents the electrochemical potential, E. The area of predominance is demarcated using the Nernst equation.
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
414
03:07Electron Affinity
35.1K
The electron affinity (EA) is the energy change for adding an electron to a gaseous atom to form an anion (negative ion).
35.1K
02:36Electromotive Force
25.7K
Electricity is generated by either electrons or ions flowing through a solution or a conducting medium. This flow of electrons or specifically electrical charge is defined as an electric current. When electrons move through a wire, they generate an electric current. It can be recalled that in a redox reaction, electrons are lost and gained. In the spontaneous redox reaction of zinc with copper, when zinc is immersed in a copper ion solution, a transfer of electrons from one...
25.7K
03:08Electrolytes: van't Hoff Factor
32.7K
Colligative Properties of Electrolytes
The colligative properties of a solution depend only on the number, not on the identity, of solute species dissolved. The concentration terms in the equations for various colligative properties (freezing point depression, boiling point elevation, osmotic pressure) pertain to all solute species present in the solution. Nonelectrolytes dissolve physically without dissociation or any other accompanying process. Each molecule that dissolves yields one...
The colligative properties of a solution depend only on the number, not on the identity, of solute species dissolved. The concentration terms in the equations for various colligative properties (freezing point depression, boiling point elevation, osmotic pressure) pertain to all solute species present in the solution. Nonelectrolytes dissolve physically without dissociation or any other accompanying process. Each molecule that dissolves yields one...
32.7K
01:27π Electron Effects on Chemical Shift: Overview
1.0K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.0K
02:58Crystal Field Theory - Octahedral Complexes
26.0K
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...
26.0K