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The addition of hydrogen bromide to alkenes in the presence of hydroperoxides or peroxides proceeds via an anti-Markovnikov pathway and yields alkyl bromides.
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The reaction of hydrogen bromide with alkenes in the presence of hydroperoxides or peroxides proceeds via anti-Markovnikov addition. The radical chain reaction comprises initiation, propagation, and termination steps.
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Selective Activation of Propane Using Intermediates Generated during Water Oxidation.

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This study explores electrocatalytic conversion of light alkanes into valuable oxygenates using surface oxygen from water oxidation. Researchers found specific single-atom alloys effectively break C-H bonds at room temperature, enabling efficient propane oxidation.

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Area of Science:

  • Catalysis
  • Electrochemistry
  • Materials Science

Background:

  • Electrochemical conversion of light alkanes to oxygenates offers eco-friendly hydrocarbon utilization.
  • High energy barriers for C-H bond cleavage limit ambient condition conversions.

Purpose of the Study:

  • Investigate theoretically the partial oxidation of propane on single-atom alloys.
  • Utilize active intermediates from water oxidation as oxidants.
  • Identify efficient electrocatalysts for hydrocarbon conversion.

Main Methods:

  • Theoretical investigation of propane oxidation on single-atom alloys.
  • Computational analysis of C-H bond cleavage barriers.
  • Experimental validation of catalytic activity.

Main Results:

  • Stable surface oxygen atoms maintained under controlled potential and pH during water oxidation.
  • Achieved a low free energy barrier (0.54 eV) for C-H bond cleavage at room temperature.
  • Identified three promising single-atom alloy surfaces for propane oxidation.
  • Experimentally demonstrated propane to acetone conversion on Ni-doped Au surfaces.

Conclusions:

  • Exploiting water oxidation intermediates as oxidants is a viable strategy for electrocatalyst design.
  • Developed an efficient method for converting hydrocarbons into value-added chemicals.
  • Single-atom alloys show significant potential for sustainable chemical synthesis.