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Updated: Sep 9, 2025
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A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
Published on: August 17, 2016
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Magnetic Field-Driven Interface Hydroxylation via the Vibrational Stark Effect Boosts Alkaline Hydrogen Evolution
Xiayan Yao1,2, Jianwei Guo1,2, Zhi Wang1,2
1National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P.R. China.
JACS Au
|August 29, 2025
Summary
Magnetic fields can tune interfacial water structure at the molecular level, enhancing the hydrogen evolution reaction (HER). This approach improves catalytic efficiency and stability for industrial hydrogen production.
Area of Science:
- Electrochemistry
- Materials Science
- Physical Chemistry
Background:
- Tuning interfacial water structure is crucial for optimizing electrocatalytic reactions like the hydrogen evolution reaction (HER).
- Conventional magnetohydrodynamic (MHD) strategies focus on mass transport, neglecting molecular-level water structure modulation.
- A novel strategy is needed to intrinsically enhance electrocatalytic performance by manipulating interfacial water.
Purpose of the Study:
- To demonstrate a universal and scalable strategy for catalytic optimization by reconfiguring interfacial water structures using magnetic fields.
- To investigate the molecular-level mechanisms underlying magnetic field-induced enhancement of the HER.
- To explore the potential of this approach for broader electrocatalytic applications.
Main Methods:
- Utilizing a permanent magnetic field to influence interfacial water structure via the vibrational Stark effect (VSE).
- Employing in situ Raman spectroscopy and molecular dynamics (MD) simulations to analyze water structure and hydrogen bond (HB) networks.
- Conducting electrochemical measurements to evaluate the performance enhancement for HER.
Main Results:
- A permanent magnetic field (1 T) amplified specific interfacial water configurations (DDAA), governed by VSE.
- Restructured interfacial HB networks and enhanced charge transfer kinetics were observed.
- A 50 mV reduction in HER overpotential at 10 mA·cm⁻² and stable performance (>10 h) were achieved.
- A 15.40% increase in current density was observed under industrial alkaline electrolysis conditions.
Conclusions:
- Magnetic field-driven reconfiguration of interfacial water at the molecular level is a viable strategy for intrinsic electrocatalytic enhancement.
- This VSE-governed approach offers a scalable and generalizable method for optimizing HER and other electrocatalytic reactions.
- The findings provide valuable insights for advanced electrocatalysis and industrial hydrogen production.
Keywords:
asymmetrically bonded tetrahedral waterhydrogen evolution reactionhydroxylationmagnetic fieldvibrational Stark effectweak hydrogen bondingMore Related Videos
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