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Related Concept Videos

Properties of Transition Metals02:58

Properties of Transition Metals

26.9K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
26.9K
Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

1.1K
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
1.1K
Formation of Complex Ions03:45

Formation of Complex Ions

23.9K
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...
23.9K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

21.4K
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...
21.4K
Electrodeposition01:08

Electrodeposition

700
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
700
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

510
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...
510

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Related Experiment Video

Updated: Aug 27, 2025

Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids
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Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids

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Ordered intermetallic compounds combining precious metals and transition metals for electrocatalysis.

Meicheng Yang1, Jinxin Wan2, Chao Yan2

  • 1School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, PRChina.

Frontiers in Chemistry
|October 3, 2022
PubMed
Summary

Ordered intermetallic alloys boost electrocatalyst performance in polymer electrolyte membrane fuel cells (PEMFCs). Tuning Pt- and Pd-based nanocrystals enhances activity and stability for oxygen reduction and fuel oxidation reactions.

Keywords:
Pt- and Pd-based nanocrystalselectrocatalystsordered intermetallic alloyspolymer electrolyte membrane fuel cellstunable morphology and structure

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

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Advanced electrocatalysts are crucial for polymer electrolyte membrane fuel cells (PEMFCs).
  • Ordered intermetallic alloys offer enhanced activity and stability for electrochemical reactions.
  • Platinum (Pt)- and Palladium (Pd)-based nanocrystals are key components in fuel cell catalysis.

Purpose of the Study:

  • To highlight recent advances in tuning intermetallic Pt- and Pd-based nanocrystals for PEMFCs.
  • To discuss the fabrication and tuning of ordered noble metal-transition metal-bonded intermetallic nanocrystals (PtM and PdM, where M = Fe, Co).
  • To propose strategies for further improving the efficiency of these intermetallic alloys in electrocatalysis.

Main Methods:

  • High-temperature annealing treatments for fabricating ordered PtM and PdM intermetallic nanocrystals.
  • Tuning nanocrystal morphology and structure to optimize catalytic properties.
  • Investigating catalytic activity for oxygen reduction and fuel oxidation reactions.

Main Results:

  • Ordered intermetallic alloys demonstrate significantly improved activity and stability as electrocatalysts.
  • Tuning the structure and morphology of Pt- and Pd-based intermetallic nanocrystals enhances their performance in PEMFCs.
  • High-temperature annealing is an effective method for creating stable and active intermetallic electrocatalysts.

Conclusions:

  • The ordered intermetallic strategy for noble and transition metals shows great potential for advancing electrocatalysis.
  • Further research into these intermetallic alloys can lead to more efficient and durable fuel cell technologies.
  • This approach facilitates improved electrocatalytic reactions, paving the way for next-generation energy devices.