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In addition to the oxymercuration–demercuration method, which converts the alkenes to alcohols with Markovnikov orientation, a complementary hydroboration-oxidation method yields the anti-Markovnikov product. The hydroboration reaction, discovered in 1959 by H.C. Brown, involves the addition of a B–H bond of borane to an alkene giving an organoborane intermediate. The oxidation of this intermediate with basic hydrogen peroxide forms an alcohol.
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Improved Heterojunction Quality in Cu2O-based Solar Cells Through the Optimization of Atmospheric Pressure Spatial Atomic Layer Deposited Zn1-xMgxO
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Optimizing Surface Electronic Structure by Ba Dispersion for Enhanced High-Temperature Oxygen Evolution Reaction

Hewei Liu1,2, Mengna Wang2,3, Tianfu Liu2

  • 1College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, 116034 China.

Journal of the American Chemical Society
|July 4, 2025
PubMed
Summary
This summary is machine-generated.

Barium (Ba) dispersion enhances the Pr0.9CoO3-δ anode for solid oxide electrolysis cells (SOECs). This surface modification improves oxygen evolution reaction activity and reduces polarization resistance for efficient energy conversion.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Surface modification of perovskite oxides is crucial for optimizing work function and enhancing catalytic activity.
  • Perovskite oxides are key materials in solid oxide electrolysis cells (SOECs) for energy conversion applications.
  • Engineering surface electronic structure influences electron/ion transfer and reaction intermediate adsorption.

Purpose of the Study:

  • To modify the surface electronic structure of the Pr0.9CoO3-δ anode in SOECs.
  • To investigate the effect of high-temperature barium (Ba) dispersion on anode performance.
  • To enhance oxygen evolution reaction (OER) activity and reduce polarization resistance.

Main Methods:

  • High-temperature dispersion of Ba species onto the Pr0.9CoO3-δ anode.
  • Comprehensive structural and electrochemical characterizations.
  • In situ characterizations and density functional theory (DFT) calculations.

Main Results:

  • Ba dispersion significantly enhanced the surface d-p orbital hybridization between Co and O atoms.
  • Weakened Co-O bond covalency facilitated oxygen vacancy formation and oxygen ion mobility.
  • The Ba-dispersed anode showed reduced polarization resistance and superior OER activity (3.36 A·cm-2 at 1.6 V and 800 °C).

Conclusions:

  • High-temperature Ba dispersion is a novel strategy for engineering SOEC anode surface electronic structures.
  • This approach effectively enhances catalytic activity and electrochemical performance.
  • Findings offer insights into rational catalyst design for efficient energy conversion.