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Related Concept Videos

Lewis Symbols and the Octet Rule02:36

Lewis Symbols and the Octet Rule

66.9K
Chemical bonds are complex interactions between two or more atoms or ions, which reduce the potential energy of the molecule. Gilbert N. Lewis developed a model called the Lewis model that simplified the depiction of chemical bond formation and provided straightforward explanations for the chemical bonds seen in most common compounds.
66.9K
Lewis Acids and Bases02:33

Lewis Acids and Bases

44.8K
In 1923, G. N. Lewis proposed a generalized definition of acid-base behavior in which acids and bases are identified by their ability to accept or to donate a pair of electrons and form a coordinate covalent bond.
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
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Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

2.4K
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.
2.4K
Lewis Structures of Molecular Compounds and Polyatomic Ions02:54

Lewis Structures of Molecular Compounds and Polyatomic Ions

37.1K
To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:
37.1K
Lewis Structures and Formal Charges02:19

Lewis Structures and Formal Charges

15.6K
Lewis symbols can be used to indicate the formation of covalent bonds, which are shown in Lewis structures—drawings that describe the bonding in molecules and polyatomic ions. The periodic table can be used to predict the number of valence electrons in an atom and the number of bonds that will be formed to reach an octet. Group 18 elements, such as argon and helium, have filled electron configurations and thus rarely participate in chemical bonding. However, atoms from group 17, such as...
15.6K
Covalent Bonding and Lewis Structures02:46

Covalent Bonding and Lewis Structures

51.1K
Compared to ionic bonds, which results from the transfer of electrons between metallic and nonmetallic atoms, covalent bonds result from the mutual attraction of atoms for a “shared” pair of electrons.
51.1K

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Related Experiment Video

Updated: Sep 10, 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

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Correction: A Lewis basic CeO2 cocatalyst expedites two-electron air electroreduction at the theoretical limit.

Lili Jiang1, Shan Ding1, Haiyun Li1

  • 1Key Laboratory for Soft Chemistry and Functional Materials, School of Chemistry and Chemical Engineering, School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, China. sheng.chen@njust.edu.cn.

Chemical Communications (Cambridge, England)
|August 21, 2025
PubMed
Summary

This correction clarifies that a Lewis basic cerium dioxide (CeO2) cocatalyst enhances the two-electron air electroreduction process, achieving the theoretical limit. This advancement is crucial for efficient electrochemical energy conversion technologies.

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Last Updated: Sep 10, 2025

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Context:

  • The original study investigated cerium dioxide (CeO2) as a Lewis basic cocatalyst for two-electron air electroreduction.
  • Achieving the theoretical limit in electroreduction is a key goal for energy conversion efficiency.

Purpose:

  • To provide a correction to the previously published work regarding the performance of the CeO2 cocatalyst.
  • To ensure accurate reporting of the experimental findings and mechanistic insights.

Summary:

  • The correction pertains to the performance of a Lewis basic cerium dioxide (CeO2) cocatalyst in facilitating two-electron air electroreduction.
  • The cocatalyst enables the reaction to proceed at the theoretical limit, optimizing energy conversion.

Impact:

  • Ensures the scientific community has accurate data for further research in electrocatalysis and energy storage.
  • Highlights the potential of modified cerium dioxide materials in electrochemical applications.