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Related Concept Videos

Nitriles to Amines: LiAlH4 Reduction00:55

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Nitriles are reduced to amines in the presence of strong reducing agents like lithium aluminum hydride through a typical nucleophilic acyl substitution. The reaction requires two equivalents of the reducing agent. The reducing agent acts as a source of hydride ions.
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Nitriles can be reduced to primary amines using reducing agents like lithium aluminum hydride or catalytic hydrogenation. The reduction introduces an amino group with an extra carbon in the skeleton. Nitriles are formed from the reaction between alkyl halides and sodium cyanide through the SN2 mechanism. Primary alkyl halides are the preferred substrates to prepare nitriles.
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High-performance NH3 production via NO electroreduction over a NiO nanosheet array.

Pengyu Liu1,2, Jie Liang2, Jiaqian Wang2

  • 1College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, Shandong, China. luoylcwnu@hotmail.com.

Chemical Communications (Cambridge, England)
|November 29, 2021
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Summary

This study introduces a novel nickel oxide (NiO) electrocatalyst for nitrogen oxide (NO) reduction, efficiently converting NO emissions into ammonia (NH3) and generating electricity simultaneously.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Environmental Catalysis

Background:

  • Nitrogen oxide (NO) emissions contribute to air pollution and acid rain.
  • Electrocatalytic reduction offers a promising route for NO control and valuable chemical production.
  • Developing efficient and selective electrocatalysts for NO reduction under ambient conditions is crucial.

Purpose of the Study:

  • To develop a highly active and selective electrocatalyst for NO reduction.
  • To investigate the performance of a NiO nanosheet array catalyst for NO to NH3 conversion.
  • To explore the potential of a Zn-NO battery for simultaneous electricity generation and ammonia production.

Main Methods:

  • Fabrication of NiO nanosheet arrays on titanium mesh.
  • Electrochemical testing of the catalyst for NO reduction.
  • Assembly and testing of an aqueous Zn-NO battery.
  • Theoretical calculations to elucidate the NO electroreduction mechanism.

Main Results:

  • The NiO nanosheet array achieved 90% faradaic efficiency for NO reduction.
  • A high ammonia (NH3) yield of 2130 μg h⁻¹ cm⁻² was obtained.
  • The Zn-NO battery demonstrated a power density of 0.88 mW cm⁻² and NH3 yield of 228 μg h⁻¹ cm⁻².
  • Theoretical calculations provided insights into the reaction mechanism.

Conclusions:

  • NiO nanosheet arrays are effective electrocatalysts for NO reduction to NH3.
  • The developed Zn-NO battery system shows potential for energy generation and pollutant remediation.
  • This work contributes to the development of sustainable technologies for emission control and chemical synthesis.