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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...
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
Cycloaddition Reactions: MO Requirements for Photochemical Activation01:12

Cycloaddition Reactions: MO Requirements for Photochemical Activation

Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
Cycloaddition Reactions: MO Requirements for Thermal Activation01:16

Cycloaddition Reactions: MO Requirements for Thermal Activation

Thermal cycloadditions are reactions where the source of activation energy needed to initiate the reaction is provided in the form of heat. A typical example of a thermally-allowed cycloaddition is the Diels–Alder reaction, which is a [4 + 2] cycloaddition. In contrast, a [2 + 2] cycloaddition is thermally forbidden.
Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

Oxidation–Reduction Reactions
Oxidation and Reduction of Organic Molecules01:19

Oxidation and Reduction of Organic Molecules

Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...

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Related Experiment Video

Updated: May 9, 2026

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

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Published on: April 10, 2018

Strong Interfacial Electronic Coupling in Ni3Mo3C@MoO2 for Durable Oxygen Evolution Reaction.

Yu Zhang1,2, Jia Ren3, Zhiming Li4

  • 1Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, China.

Small (Weinheim an Der Bergstrasse, Germany)
|May 8, 2026
PubMed
Summary

This study introduces a new catalyst, Ni₃Mo₃C@MoO₂-CN, for efficient electrochemical hydrogen production via the oxygen evolution reaction (OER). The novel carbide/oxide interface enhances catalytic activity and durability for water splitting.

Keywords:
Keggin‐type polyoxometalatecore–shell structureoxygen evolution reactiontransition metal carbide

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Last Updated: May 9, 2026

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
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06:53

Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • The oxygen evolution reaction (OER) is crucial for electrochemical hydrogen production but suffers from slow kinetics and catalyst instability.
  • Carbide/oxide heterostructures offer promising catalytic properties for OER due to unique interfacial effects.

Purpose of the Study:

  • To develop high-performance OER catalysts by engineering interfacial electronic coupling between carbides and electronegative oxide nanoparticles.
  • To investigate the catalytic mechanism and performance of Ni₃Mo₃C anchored on MoO₂ nanoparticles for OER.

Main Methods:

  • Synthesis of Ni₃Mo₃C@MoO₂-CN catalyst with strong carbide/oxide interfacial electronic coupling.
  • Electrochemical characterization of OER performance, including overpotential and durability tests.
  • Analysis of interfacial electronic coupling and its effect on OER mechanism via electron transfer studies.

Main Results:

  • The Ni₃Mo₃C@MoO₂-CN catalyst demonstrated excellent OER performance with a low overpotential of 197 mV at 10 mA cm⁻².
  • An electrolyzer using this catalyst achieved a low cell voltage of 1.92 V at 500 mA cm⁻² with 2000 hours of stability.
  • Carbide/oxide interfacial electronic coupling facilitated electron transfer, optimizing O* adsorption and promoting spontaneous OOH* formation.

Conclusions:

  • Strong carbide/oxide interfacial electronic coupling is an effective strategy for designing high-performance OER catalysts.
  • The Ni₃Mo₃C@MoO₂-CN catalyst shows significant potential for efficient and durable electrochemical hydrogen production.
  • Understanding interfacial electronic coupling provides fundamental insights for advancing OER catalysis.