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Metal-Ligand Bonds02:51

Metal-Ligand Bonds

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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...
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Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

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In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
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Extraction: Advanced Methods00:56

Extraction: Advanced Methods

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Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
446
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

514
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
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Formation of Complex Ions03:45

Formation of Complex Ions

23.6K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
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Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
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In Situ Constructing Metal-Organic Complex Interface Layer Using Biomolecule Enabling Stabilize Zn Anode.

Zaifang Yuan1,2, Kaiyuan Zhan1, Di Li1

  • 1College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 401331, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|March 21, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a new method using adenosine triphosphate (ATP) to stabilize zinc anodes in aqueous zinc-ion batteries (ZIBs). This innovation prevents dendrite growth and side reactions, paving the way for safer, more efficient energy storage.

Keywords:
Zn anodeadenosine triphosphate (ATP)protective layer

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Aqueous zinc-ion batteries (ZIBs) offer safe, low-cost, and eco-friendly energy storage solutions.
  • Commercialization is limited by zinc anode dendrite growth and side reactions.
  • Stabilizing the zinc anode is crucial for high-performance ZIBs.

Purpose of the Study:

  • To develop a facile strategy for in situ construction of a protective interfacial layer on zinc anodes.
  • To enhance the electrochemical performance and stability of zinc anodes in ZIBs.
  • To investigate the mechanism of the protective layer in suppressing dendrite formation and side reactions.

Main Methods:

  • In situ construction of a multifunctional film using adenosine triphosphate (ATP) on the Zn anode surface via etching.
  • Electrochemical testing of symmetric cells (ATP@Zn//ATP@Zn) for plating/stripping reversibility.
  • Assembly and evaluation of full cells (ATP@Zn//MnO2) to assess practical feasibility.

Main Results:

  • The ATP-induced interfacial layer enhanced lipophilicity, promoting uniform Zn2+ flux and deposition.
  • The functional interlayer effectively suppressed corrosion and hydrogen evolution reactions.
  • The ATP@Zn anode demonstrated excellent plating/stripping stability for over 2800 hours at 5.0 mA cm-2 and 1 mAh cm-2.

Conclusions:

  • Adenosine triphosphate (ATP) serves as an effective agent for creating a protective interphase on zinc anodes.
  • The developed strategy significantly improves the stability and reversibility of zinc anodes in aqueous ZIBs.
  • This approach offers a promising pathway for the commercialization of high-performance and safe ZIBs.