Cobaloximes: selective nitrite reduction catalysts for tandem ammonia synthesis

Abstract

Herein, we demonstrate cobaloxime as a bio-inspired molecular platform for exclusive ammonia synthesis via electrocatalytic NO2- reduction (eNO2-RR), which attained 98.5% Faradic efficiency (FE) under close-to-neutral conditions. Mechanistic studies illustrated...

Cascade N2 Reduction Process with DBD Plasma Oxidation and Electrocatalytic Reduction for Continuous Ammonia Synthesis

“…In Sections and 3.2, the nitrate reduction performance of the electrocatalyst and the nitrogen fixation ability of the DBD plasma reactor are evaluated, respectively. The previously published work treated the two processes separately, which makes it difficult to realize the ammonia synthesis continuously and stably. ,, Meanwhile, the inherent shortcomings of H-type batch reactors also cannot meet the requirement for the demonstration of industrial application. Therefore, as shown in Figure S1, the coupled process of plasma nitrogen fixation with the electrocatalytic ammonia synthesis is designed to realize the sustainable production of ammonia from air to product.…”

Recent developments and prospects for engineering first-row transition metal-based catalysts for electrocatalytic NOx− reduction to ammonia

“…Recently, the electrocatalytic nitrate (NO 3 − )/nitrite (NO 2 − ) reduction reaction has shed new light on renewable NH 3 synthesis as NO x − exhibits substantially increased solubility in water and lower cleavage energy compared to N 2 . 13–15 The stable supply of NO 3 − and NO 2 − is a crucial factor for achieving electrocatalytic green ammonia generation. It might be advisable to obtain NO x − from wastewater.…”

CoFe nanoalloys encapsulated in nitrogen-doped carbon for efficient nitrite electroreduction to ammonia

“…25 Wu et al discovered that the catalyst composed of cobaloximes and multi-walled carbon nanotubes achieved an NH 3 yield of about 115 μmol h −1 , and a high NH 3 FE above 95% at −0.5 V vs. RHE. 26 Liu and co-workers recently reported that the FeP nanoarrays on a Ti plate can selectively reduce NO 2 − to NH 3 with an NH 3 FE of 82.5%. 16 Although some achievements have been made in Fe or Co-based nitrite reduction electrocatalysts, there is still much room for performance improvement.…”