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Related Concept Videos

Electrodeposition01:08

Electrodeposition

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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...
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Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
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Updated: Jan 10, 2026

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
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Partially amorphous iron-copper-nickel sulfides for robust bifunctional electrocatalysis.

Mehak Ghafoor1, Muhammad Aamir2,3, It Ee Lee4,5

  • 1Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur, 10250, (AJK), Pakistan.

Scientific Reports
|November 29, 2025
PubMed
Summary
This summary is machine-generated.

This study presents novel iron-copper-nickel sulfide (FeCuNiS) catalysts with partial amorphous structures. These bifunctional electrocatalysts demonstrate excellent performance and stability for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER).

Keywords:
Alkaline media HERAmorphous electrocatalystsElectrocatalysisHEROER

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Bifunctional electrocatalysts are crucial for energy conversion and pollution treatment.
  • Developing efficient and stable catalysts for reactions like hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is essential.

Purpose of the Study:

  • To synthesize novel iron-copper-nickel sulfide (FeCuNiS) catalysts with partial amorphous character.
  • To evaluate the bifunctional electrocatalytic performance of FeCuNiS for HER and OER in alkaline media.

Main Methods:

  • Hydrothermal synthesis method was employed to create FeCuNiS catalysts.
  • Electrochemical characterization techniques were used to assess catalytic activity and stability.

Main Results:

  • An iron-rich FeCuNiS composition with optimal copper and nickel ratios showed robust HER and OER performance.
  • The partial amorphous nature of the catalysts provided more active sites, leading to lower overpotentials for HER and OER.
  • All synthesized FeCuNiS compositions exhibited excellent electrocatalytic stability.

Conclusions:

  • The study successfully developed partially amorphous FeCuNiS bifunctional electrocatalysts.
  • The findings highlight an effective strategy for designing advanced electrocatalysts for energy conversion applications.
  • Partially amorphous FeCuNiS catalysts offer a promising pathway for efficient hydrogen and oxygen evolution reactions.