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Related Concept Videos

Interfacial Electrochemical Methods: Overview01:06

Interfacial Electrochemical Methods: Overview

Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current passing...
Electrochemical Systems01:24

Electrochemical Systems

Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...
Electrochemical Cells01:28

Electrochemical Cells

Electrochemical cells are systems that convert chemical energy into electrical energy or use electrical energy to drive chemical reactions. They consist of two electrodes in contact with an electrolyte, where redox reactions enable electron transfer. Most electrochemical cells include two half-cells connected by an external wire for electron flow and a salt bridge for ion flow. The salt bridge contains an electrolyte solution and maintains charge neutrality by allowing ions—not electrons—to...
Induced Electric Dipoles01:28

Induced Electric Dipoles

A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Processes at Electrodes01:30

Processes at Electrodes

The electrode interacts with ions in the electrolyte solution at its interface. The rate of oxidation and reduction depends on the speed at which electrons can transfer through this interface. As ions attach to or leave the electrode surface, the electrode acquires a charge, and an electrical potential forms across the interface, making the process more difficult to reach equilibrium. The charge on the electrode affects the local ion concentrations in the solution, though thermal motion...
Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...

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Updated: Jun 14, 2026

Membraneless Hydrogen Peroxide Fuel Cells as a Promising Clean Energy Source
06:39

Membraneless Hydrogen Peroxide Fuel Cells as a Promising Clean Energy Source

Published on: October 20, 2023

Dynamic Reconstruction-Engineered Heterointerfaces for Acidic Hydrogen Evolution at Ampere-Level Current Density.

Kaixi Wang1,2, Yunshan Zheng1, Chengzong Yuan3

  • 1Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|June 12, 2026
PubMed
Summary

Developing advanced catalysts for acidic hydrogen evolution reaction (HER) is crucial for industrial hydrogen production. This study presents a novel reconstructed catalyst with high activity and durability for efficient and scalable acidic HER catalysis.

Keywords:
acidic hydrogen evolutionampere‐level current densitycopper phosphide nanowiresdissolution‐redeposition equilibriumdynamic reconstruction

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Hydrogen Production and Utilization in a Membrane Reactor
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Hydrogen Production and Utilization in a Membrane Reactor

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Last Updated: Jun 14, 2026

Membraneless Hydrogen Peroxide Fuel Cells as a Promising Clean Energy Source
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Hydrogen Production and Utilization in a Membrane Reactor
10:00

Hydrogen Production and Utilization in a Membrane Reactor

Published on: March 10, 2023

Area of Science:

  • Electrochemistry
  • Materials Science
  • Catalysis

Background:

  • Proton exchange membrane electrolysis demands efficient acidic hydrogen evolution reaction (HER) catalysts.
  • Current catalysts often lack the required activity and durability for industrial applications at high current densities.

Purpose of the Study:

  • To develop a novel catalyst for highly active and durable acidic HER.
  • To investigate a new in situ dynamic reconstruction method for catalyst enhancement.

Main Methods:

  • Electrocatalyst synthesis via dynamic reconstruction of Cu3P nanowires.
  • In situ transformation into PtCu/Cu3P heterostructures.
  • Electrochemical characterization and mechanistic studies.

Main Results:

  • Achieved benchmark HER performance in acidic media with low overpotentials (37.8 mV at 10 mA cm−2 and 207.8 mV at 1000 mA cm−2).
  • Demonstrated exceptional stability, operating over 240 hours at 1000 mA cm−2.
  • Identified synergistic effects at the heterointerface and porous morphology for enhanced performance.

Conclusions:

  • The novel reconstructed catalyst shows significant promise for industrial-scale acidic HER.
  • Dynamic reconstruction offers a viable pathway for creating advanced electrocatalysts.
  • Heterointerface engineering and morphology control are key to high-performance HER catalysis.