Iron Diboride (FeB<sub>2</sub>) for the Electroreduction of NO to NH<sub>3</sub>
Guike Zhang, Fuzhou Wang, Yuying Wan, Yali Guo, Ke Chu
Abstract
We report iron diboride (FeB 2 ) as a high-performance metal diboride catalyst for electrochemical NO-to-NH 3 reduction (NORR), which shows a maximum NH 3 yield rate of 289.3 μmol h –1 cm –2 and a NH 3 -Faradaic efficiency of 93.8% at −0.4 V versus reversible hydrogen electrode. Theoretical computations reveal that Fe and B sites synergetically activate the NO molecule, while the protonation of NO is energetically more favorable on B sites. Meanwhile, both Fe and B sites preferentially absorb NO over H atoms to suppress the competing hydrogen evolution.
Topics & Concepts
ChemistryProtonationFaraday efficiencyElectrochemistryYield (engineering)MetalHydrogenCatalysisMoleculeElectrodeInorganic chemistryCrystallographyPhysical chemistryMetallurgyIonOrganic chemistryMaterials scienceAmmonia Synthesis and Nitrogen ReductionHydrogen Storage and MaterialsCatalytic Processes in Materials Science