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Related Concept Videos

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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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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Properties of Transition Metals02:58

Properties of Transition Metals

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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.
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Related Experiment Video

Updated: Jun 26, 2025

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
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Metal Doping Regulates Electrocatalysts Restructuring During Oxygen Evolution Reaction.

Maoyu Wang1,2, Brian A Muhich1, Zizhou He3

  • 1School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, OR 97331, United States.

Chemsuschem
|May 10, 2024
PubMed
Summary

Developing efficient, low-cost catalysts is key for water splitting. This study optimized cobalt-nickel sulfides (CoxNi1-xSy) for the oxygen evolution reaction (OER), enhancing both activity and stability through controlled restructuring.

Keywords:
ElectrocatalystNanoclusterRestructuringX-ray Photoelectron SpectroscopyX-ray absorption Spectroscopy

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • High-efficiency and low-cost catalysts are crucial for electrochemical water splitting and hydrogen production.
  • Transition metal dichalcogenides show promise but suffer from poor stability during the oxygen evolution reaction (OER).

Purpose of the Study:

  • To investigate catalyst restructuring during OER.
  • To develop stable and efficient bimetallic sulfide electrocatalysts (CoxNi1-xSy) for the oxygen evolution reaction (OER).

Main Methods:

  • Synthesized bimetallic CoxNi1-xSy catalysts with varying Ni:Co ratios.
  • Employed surface-sensitive X-ray photoelectron spectroscopy (XPS) and bulk-sensitive X-ray absorption spectroscopy (XAS) to analyze catalyst structure and electronic properties before and after OER.

Main Results:

  • Confirmed favorable restructuring of transition metal sulfides after OER.
  • Demonstrated that incorporating small amounts of nickel (Ni) into cobalt (Co) sulfides optimizes the local electronic structure.
  • Showed that Ni doping regulates restructuring, improving the balance between OER activity and catalyst stability.

Conclusions:

  • Nickel doping in cobalt sulfides effectively controls restructuring for enhanced OER performance.
  • Developed a doping-regulated restructuring strategy for efficient, noble metal-free OER electrocatalysts.