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Related Concept Videos

Oxidative Cleavage of Alkenes: Ozonolysis01:46

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In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
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Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
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Electrochemistry is the branch of chemistry that studies the relationship between electrical quantities and chemical reactions, particularly oxidation and reduction. Oxidation is the loss of electrons from a substance, whereas reduction refers to the gain of electrons. A substance with a strong electron affinity is called an oxidizing agent (oxidant), and a reducing agent (reductant) is a species that donates electrons. Oxidation and reduction processes are pivotal to electrochemical reactions,...
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Alkali Metals

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Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
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Related Experiment Video

Updated: Jun 27, 2025

Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
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Coupling Nano and Atomic Electric Field Confinement for Robust Alkaline Oxygen Evolution.

Qiyou Wang1, Yujie Gong2, Xin Zi1

  • 1Hunan Joint International Research Center for Carbon Dioxide Resource Utilization, State Key Laboratory of Powder Metallurgy, School of Physics, Central South University, Changsha, 410083, P. R. China.

Angewandte Chemie (International Ed. in English)
|April 29, 2024
PubMed
Summary

Researchers developed Mn single atom doped CoP nanoneedles (Mn SA-CoP NNs) to improve alkaline oxygen evolution reaction (OER) efficiency. This catalyst utilizes nano-scale and atomic electric fields to overcome key challenges in clean fuel production.

Keywords:
Nanoneedlesalkaline oxygen evolutionlocal electric fieldsingle atom

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Catalysis

Background:

  • Alkaline oxygen evolution reaction (OER) is crucial for clean fuel production and energy storage.
  • Challenges in alkaline OER include high overpotentials, excessive hydroxide consumption, and intermediate adsorption.
  • Developing efficient and stable catalysts is essential for advancing OER technologies.

Purpose of the Study:

  • To propose and demonstrate a cooperative strategy using nano-scale and atomically local electric fields for enhanced alkaline OER.
  • To synthesize and characterize manganese single atom doped cobalt phosphide nanoneedles (Mn SA-CoP NNs).
  • To investigate the underlying mechanisms of electric field enhancement in OER.

Main Methods:

  • Synthesis of Mn SA-CoP NNs.
  • Finite element method (FEM) simulations and density functional theory (DFT) calculations.
  • In situ attenuated total reflection infrared and Raman spectroscopy.
  • Electrochemical performance testing (overpotential, stability).

Main Results:

  • FEM and DFT predicted that nano-scale electric fields enrich OH- and atomic electric fields improve *O desorption.
  • Experimental validation confirmed the synergistic effects of nano-scale and atomic electric fields.
  • Mn SA-CoP NNs achieved an ultra-low overpotential of 189 mV at 10 mA cm-2.
  • The catalyst demonstrated stable operation for over 100 hours at ~100 mA cm-2.

Conclusions:

  • The cooperative strategy leveraging both nano-scale and atomically local electric fields effectively enhances alkaline OER.
  • Mn SA-CoP NNs represent a highly efficient and stable catalyst for alkaline OER.
  • This approach offers new insights for designing advanced catalysts for energy conversion applications.