Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Thermal and Photochemical Electrocyclic Reactions: Overview

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.

Metal-Ligand Bonds

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...

Coordination Number and Geometry

Coordination Number and Geometry

For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.

Structural Isomerism

Structural Isomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...

Coordination Compounds and Nomenclature

Coordination Compounds and Nomenclature

In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...

Valence Bond Theory

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...

You might also read

Related Articles

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

Sort by

Same author

Two-component bimetallic sulfides enhancing OER activity.

Dalton transactions (Cambridge, England : 2003)·2026

Same author

A neutral Mn(II)-BIF for electrocatalytic oxygen reduction reaction.

Dalton transactions (Cambridge, England : 2003)·2025

Same author

Correction: White matter diffusion estimates in obsessive-compulsive disorder across 1653 individuals: machine learning findings from the ENIGMA OCD Working Group.

Molecular psychiatry·2024

Same author

Low Levels of Metrnl are Linked to the Deterioration of Diabetic Kidney Disease.

Diabetes, metabolic syndrome and obesity : targets and therapy·2024

Same author

Integrated machine learning and deep learning for predicting diabetic nephropathy model construction, validation, and interpretability.

Endocrine·2024

Same author

Single-molecule electrochemical imaging resolves the midpoint potentials of individual fluorophores on nanoporous antimony-doped tin oxide.

Chemical science·2024

Search research articles

Related Experiment Video

Updated: Sep 23, 2025

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

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

Published on: April 27, 2018

Ni(ii)-based coordination polymers for efficient electrocatalytic oxygen evolution reaction.

Zhi-Qiang Jiang¹, Yu-Feng Li¹, Xue-Jun Zhu¹

¹Deep-processing of Fine Flake Graphite Sichuan Province Key Laboratory of Colleges and Universities, Panzhihua University Panzhihua Sichuan 617000 P. R. China jiangzhiqiang@mail.pzhu.edu.cn.

|May 13, 2022

Summary

This summary is machine-generated.

Developing earth-abundant electrocatalysts for water oxidation is challenging. This study presents novel iron-immobilized nickel coordination polymers (Fe@Ni-CPs) as effective electrocatalysts for the oxygen evolution reaction in alkaline media.

More Related Videos

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Published on: August 7, 2018

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

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

Published on: April 10, 2018

Related Experiment Videos

Last Updated: Sep 23, 2025

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

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

Published on: April 27, 2018

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Published on: August 7, 2018

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

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

Published on: April 10, 2018

Area of Science:

Materials Science
Electrochemistry
Catalysis

Background:

Efficient and stable electrocatalysts for water oxidation are crucial for energy conversion technologies.
Developing catalysts from earth-abundant elements is essential for cost-effectiveness and sustainability.
Existing catalysts often face challenges with stability in harsh alkaline environments.

Purpose of the Study:

To synthesize and characterize novel alkaline-stable cationic nickel(ii) coordination polymers (Ni-CPs).
To immobilize iron(iii) into the Ni-CPs structure, forming Fe-immobilized Fe@Ni-CPs.
To evaluate the performance of the novel Fe@Ni-CPs as electrocatalysts for the oxygen evolution reaction (OER) in strong alkaline media.

Main Methods:

Hydrothermal synthesis of cationic Ni-CPs.
Incorporation of Fe(iii) into Ni-CPs to form Fe@Ni-CPs.
Electrochemical evaluation of Fe@Ni-CPs for OER in strong alkaline solution.

Main Results:

Successfully synthesized alkaline-stable cationic Ni-CPs.
Achieved stable incorporation of Fe(iii) within the Ni-CPs structure.
Demonstrated the effectiveness of Fe@Ni-CPs as electrocatalysts for OER in strong alkaline media.

Conclusions:

Fe@Ni-CPs represent a new class of effective electrocatalysts for OER.
The developed Ni-based coordination polymers offer a promising pathway for utilizing earth-abundant materials in catalysis.
The findings contribute to the development of efficient and cost-effective water oxidation electrocatalysts.