Electrochemical N<sub>2</sub> Reduction to Ammonia Using Single Au/Fe Atoms Supported on Nitrogen-Doped Porous Carbon
Sudhir K. Sahoo, Julian Heske, Markus Antonietti, Qing Qin, Martin Oschatz, Thomas D. Kühne
Abstract
molecules. Furthermore, we have experimentally shown that single sites of Au and Fe supported on nitrogen-doped porous carbon are indeed active NRR catalysts. However, in contrast to our theoretical results, the Au-based catalyst performed slightly better with a Faradaic efficiency (FE) of 10.1% than the Fe-based catalyst with an FE of 8.4% at -0.2 V vs. RHE. The DFT calculations suggest that this difference is due to the competitive hydrogen evolution reaction and higher desorption energy of ammonia.
Topics & Concepts
CatalysisElectrochemistryAdsorptionFaraday efficiencyNitrogenReversible hydrogen electrodeAmmonia productionInorganic chemistryDensity functional theoryHydrogenAmmoniaMoleculeMetalRedoxChemistryCarbon fibersMaterials scienceChemical engineeringPhysical chemistryElectrodeComputational chemistryWorking electrodeOrganic chemistryEngineeringComposite numberComposite materialAmmonia Synthesis and Nitrogen ReductionNanomaterials for catalytic reactionsAdvanced Photocatalysis Techniques