Electrosynthesis of Nitrate via the Oxidation of Nitrogen on Tensile‐Strained Palladium Porous Nanosheets

Abstract

Nitrate is one of the essential raw ingredients in agriculture and industry. The electrochemical nitrogen oxidation reaction (NOR) is promising to replace the conventional nitrate synthesis industry with high energy consumption and greenhouse gas emission. Here, tensile‐strained palladium porous nanosheets (Pd‐s PNSs) were prepared. They exhibited enhanced activity for electrochemical NOR at ambient conditions, greatly outperforming Pd nanosheets. 15N isotope labeling experiments proved that nitrate originated from nitrogen oxidation. Combining electrochemical in situ Raman and FTIR spectroscopy with density functional calculations, it was revealed that the tensile strain could facilitate the formation of NOR active species of PdO2, leading to high activity.

Electrochemical oxidation of molecular nitrogen to nitric acid – towards a molecular level understanding of the challenges

“…20 Recently, a few experimental reports emerged suggesting Pd-decorated MXenes and several oxides as potential electrocatalysts for nitrogen oxidative xation. [21][22][23][24] Fig. 1 Equations showing how nitric acid is manufactured on industrial scale by combining steam reforming, Haber-Bosch and Ostwald processes.…”

Microscopic-Level Insights into the Mechanism of Enhanced NH3 Synthesis in Plasma-Enabled Cascade N2 Oxidation–Electroreduction System

“…− and H 2 O during the eNO 3 − RR process. 42,43 The bending vibration for the −H−N−H intermediate can be observed at 1448 cm −1 , demonstrating the successive protonation process of NO 3 − . 15 Besides, the characteristic peaks of the product (NH 3 ) including −N−H stretching vibration and the adsorbed NH 3 (*NH 3 ) are detected at ∼3000 and 1150 cm −1 , respectively.…”

Rational design on photo(electro)catalysts for artificial nitrogen looping

“…The conversion between N 2 and NO x is the key step during the whole process of nitrogen cycling. On the one hand, NOR is another effective way to fix nitrogen, which realizes the conversion from nitrogen to nitrate 107 . On the other hand, gaseous nitrogen oxides (eg, NO and NO 2 ) are the primary pollutants in the air, which should be removed or converted to nitrogen.…”