Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Electron Transport Chain: Complex III and IV01:43

Electron Transport Chain: Complex III and IV

8.2K
During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
8.2K
Redox Reactions01:24

Redox Reactions

56.6K
Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
56.6K
Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

66.3K
Oxidation–Reduction Reactions
66.3K
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

2.5K
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.
2.5K
Redox Equilibria: Overview01:23

Redox Equilibria: Overview

1.2K
A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
1.2K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

28.1K
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...
28.1K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Anthracene-Based Rare-Earth MOF Assembly for Photocatalytic Cr(VI) Reduction and Dye Degradation.

Inorganic chemistry·2026
Same author

Photochromic Heterometallic Metal-Organic Framework as a Multifunctional Platform for Antibiotic Sensing and Sulfide Photooxidation.

Inorganic chemistry·2026
Same author

Longitudinal analysis of peripheral blood immune status and prognosis dynamic prediction for advanced colon cancer with first-line chemotherapy.

Cancer immunology, immunotherapy : CII·2026
Same author

Anthracene-Functionalized Terbium-Organic Framework for Luminescent Sensing and Adsorptive Removal of Aqueous Pollutants.

Inorganic chemistry·2026
Same author

Ligand-Substitution Engineering Enhances Fluorescence Sensing of Antibiotics in Cadmium-Organic Frameworks.

Inorganic chemistry·2026
Same author

A ratiometric fluorescent sensor based on carbon dots encapsulated in ZIF-8 for visual discrimination and detection of tetracycline and chlortetracycline.

Nanoscale·2026

Related Experiment Video

Updated: Sep 23, 2025

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

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

Published on: April 10, 2018

18.4K

A dinuclear cobalt cluster as electrocatalyst for oxygen reduction reaction.

Yun-Wu Li1, Wen-Jie Zhang1, Chun-Xia Li1

  • 1Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University Liaocheng 252000 P. R. China mahuiyanyan@163.com wangsuna@lcu.edu.cn j.s.zhao@163.com.

RSC Advances
|May 11, 2022
PubMed
Summary

This study highlights a dinuclear cobalt cluster ({CoII2}) as a non-noble metal catalyst for the Oxygen Reduction Reaction (ORR). It demonstrates excellent catalytic activity via a nearly 4-electron pathway.

More Related Videos

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
08:40

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

3.8K
Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
09:02

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

7.9K

Related Experiment Videos

Last Updated: Sep 23, 2025

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

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

Published on: April 10, 2018

18.4K
Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
08:40

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

3.8K
Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
09:02

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

7.9K

Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Dinuclear metal clusters mimic metalloenzymes for efficient catalysis.
  • Oxygen Reduction Reaction (ORR) is crucial for energy conversion technologies.

Purpose of the Study:

  • To investigate the ORR catalytic activity of a dinuclear {CoII2} cluster.
  • To understand the structure-activity relationship of the catalyst for ORR.

Main Methods:

  • X-ray single crystal diffraction for structural identification.
  • Raman spectroscopy and X-ray Photoelectron Spectroscopy (XPS) for active site characterization.
  • Electrochemical methods to evaluate ORR performance.

Main Results:

  • The crystalline {CoII2} catalyst features defined {CoN4O2} active sites.
  • Supramolecular porosity and nitrogen sites enhance ORR performance.
  • The catalyst exhibits excellent ORR activity following a near 4-electron pathway.

Conclusions:

  • The unpyrolyzed crystalline {CoII2} catalyst offers precise active sites and structural information for ORR.
  • A single cobalt center-mediated catalytic mechanism for ORR was proposed.
  • This work provides insights for designing efficient non-noble metal ORR catalysts.