Near AmbientCondition Ammonia Synthesis and In-SituCO<sub>2</sub> Co-Reduction to Urea from Nitrate

Herein, conversion of nitrate (NO<sub>3</sub><sup>̅</sup>) to ammonia (NH<sub>3</sub>) up to ∼100 mM and in-situ cascade CO<sub>2</sub> co-reduction to urea (up to ∼1.36 mM) has been demonstrated by thermally activated hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) at near ambient conditions (∼100 °C). NH<sub>3</sub> synthesis from NO<sub>3</sub><sup>̅</sup> has been confirmed using absorption, <sup>1</sup>H nuclear magnetic resonance (NMR) analysis of the reduced product and <sup>15</sup>N isotopic labeled nitratre (<sup>15</sup>NO<sub>3</sub><sup>̅</sup>) experiement. The results associated with the urea synthesis have been verified using absorption, <sup>1</sup>H NMR, and high resolution-mass spectrometry (HR-MS) analysis.

Publication Details

Journal
Figshare
Published
2025-02-03
DOI
https://doi.org/10.1021/acs.jpclett.4c03298.s001
Primary Topic
Ammonia Synthesis and Nitrogen Reduction
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article
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Near AmbientCondition Ammonia Synthesis and In-SituCO2 Co-Reduction to Urea from Nitrate

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Ammonia Synthesis and Nitrogen Reduction
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Near AmbientCondition Ammonia Synthesis and In-SituCO2 Co-Reduction to Urea from Nitrate

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Abstract

Herein, conversion of nitrate (NO<sub>3</sub><sup>̅</sup>) to ammonia (NH<sub>3</sub>) up to ∼100 mM and in-situ cascade CO<sub>2</sub> co-reduction to urea (up to ∼1.36 mM) has been demonstrated by thermally activated hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) at near ambient conditions (∼100 °C). NH<sub>3</sub> synthesis from NO<sub>3</sub><sup>̅</sup> has been confirmed using absorption, <sup>1</sup>H nuclear magnetic resonance (NMR) analysis of the reduced product and <sup>15</sup>N isotopic labeled nitratre (<sup>15</sup>NO<sub>3</sub><sup>̅</sup>) experiement. The results associated with the urea synthesis have been verified using absorption, <sup>1</sup>H NMR, and high resolution-mass spectrometry (HR-MS) analysis.

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Ammonia Synthesis and Nitrogen Reduction
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Near AmbientCondition Ammonia Synthesis and In-SituCO<sub>2</sub> Co-Reduction to Urea from Nitrate · Figshare (2025) | TGRS Research Map | TGRS