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Related Concept Videos

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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Catalysis02:50

Catalysis

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The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
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Related Experiment Video

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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
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Multimetallic Single-Atom Catalysts for Bifunctional Oxygen Electrocatalysis.

Ruisong Li1, Wenjun Fan2, Peng Rao1

  • 1State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Lab of Fine Chemistry, School of Chemical Engineering and Technology, Hainan University, Haikou 570228, China.

ACS Nano
|September 10, 2023
PubMed
Summary
This summary is machine-generated.

Designing multimetallic single-atom catalysts (MM-SACs) is key for metal-air batteries. New FeCoCuZn-SACs show excellent bifunctional oxygen electrocatalysis and high performance in zinc-air batteries.

Keywords:
Zn-air batterybifunctional electrocatalysiselectronic reciprocitymultimetalssingle-atom catalysts

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Catalysis

Background:

  • Multimetallic alloys show promise for metal-air batteries.
  • Designing multimetallic single-atom catalysts (MM-SACs) presents a significant challenge.

Purpose of the Study:

  • To develop a general method for synthesizing MM-SACs.
  • To investigate the catalytic activity and durability of MM-SACs for oxygen electrocatalysis.

Main Methods:

  • A two-step synthesis method using metal-C3N4 and nitrogen-doped carbon.
  • Electrochemical testing for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER).
  • Density functional theory (DFT) calculations to understand catalytic mechanisms.

Main Results:

  • Successfully synthesized trimetallic FeCoZn-SACs and quatermetallic FeCoCuZn-SACs.
  • FeCoCuZn-SACs exhibited superior bifunctional ORR and OER activity and durability.
  • DFT calculations highlighted the role of Co sites in FeCoCuZn-SACs for efficient catalysis.
  • Zinc-air batteries using FeCoCuZn-SACs achieved high power density (252 mW cm⁻²) and specific capacity (817 mAh gZn⁻¹).

Conclusions:

  • The developed method provides a viable route for MM-SACs synthesis.
  • FeCoCuZn-SACs demonstrate excellent potential as cathodic catalysts for high-performance zinc-air batteries.
  • This study offers insights into the advantages of MM-SACs for oxygen electrocatalysis applications.