Electrochemical Nitric Oxide Reduction on Metal Surfaces

Electrocatalytic denitrification is a promising technology for removing NOx species (NO3− , NO2− and NO). For NOx electroreduction (NOxRR), there is a desire for understanding the catalytic parameters that control the product distribution. Here, we elucidate selectivity and activity of catalyst for NOxRR. At low potential we classify metals by the binding of ∗NO versus ∗H. Analogous to classifying CO2 reduction by ∗CO vs ∗H, Cu is able to bind ∗NO while not binding ∗H giving rise to a selective NH3 formation. Besides being selective, Cu is active for the reaction found by an activity-volcano. For metals that does not bind NO the reaction stops at NO, similar to CO2-to-CO. At potential above 0.3 V vs RHE, we speculate a low barrier for N coupling with NO causing N2O formation. The work provide a clear strategy for selectivity and aims to inspire future research on NOxRR.

Electrochemical Nitric Oxide Reduction on Metal Surfaces

<div>Electrocatalytic denitrifification is a promising technology for removing NOx species (NO3⁻, NO2⁻and NO). For NO_x electroreduction (NOxRR), there is a desire for understanding the catalytic parameters that control the product distribution. Here, we elucidate selectivity and activity of catalyst for NO_xRR. At low potential we classify metals by the binding of ∗NO versus ∗H. Analogous to classifying CO2 reduction by ∗CO vs ∗H, Cu is able to bind ∗NO while not binding ∗H giving rise to a selective NH3 formation. Besides being selective, Cu is active for the reaction found by an activity-volcano. For metals that does not bind NO the reaction stops at NO, similar to CO₂-to-CO. At potential above 0.3 V vs RHE, we speculate a low barrier for N coupling with NO causing N₂O formation. The work provide a clear strategy for selectivity and aims to inspire future research on NO_xRR.</div>

Electrochemical Nitric Oxide Reduction on Metal Surfaces

<div>Electrocatalytic denitrifification is a promising technology for removing NOx species (NO3⁻, NO2⁻and NO). For NO_x electroreduction (NOxRR), there is a desire for understanding the catalytic parameters that control the product distribution. Here, we elucidate selectivity and activity of catalyst for NO_xRR. At low potential we classify metals by the binding of ∗NO versus ∗H. Analogous to classifying CO2 reduction by ∗CO vs ∗H, Cu is able to bind ∗NO while not binding ∗H giving rise to a selective NH3 formation. Besides being selective, Cu is active for the reaction found by an activity-volcano. For metals that does not bind NO the reaction stops at NO, similar to CO₂-to-CO. At potential above 0.3 V vs RHE, we speculate a low barrier for N coupling with NO causing N₂O formation. The work provide a clear strategy for selectivity and aims to inspire future research on NO_xRR.</div>

Density functional theory-based investigation of HCN and NH3 formation mechanisms during phenylalanine pyrolysis

As sludge pyrolysis produces large amounts of toxic NH3 and HCN, many works have studied nitrogen transfer during this process, commonly employing amino acids as models of sludge protein.