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Electrochemical ammonia synthesis—The selectivity challenge
Here, the N 2 molecule is particularly inert; the N–N triple bond is one of the most stable in all of chemistry, and in addition, the molecule has no dipole moment and a very low polarizability.
First-Principles Microkinetic Model for Ammonia Synthesis on Fe(110) under Nonequilibrium Programmable Heating and Quenching Operation
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Enhanced Selective Oxidation of Ammonia in a Pt/Al 2 O 3 @Cu/ZSM-5 Core–Shell Catalyst
Not provided.
A High-Performance Gas-Fed Direct Ammonia Hydroxide Exchange Membrane Fuel Cell
Not provided.
Plasma-Assisted Surface Nitridation of Proton Intercalatable WO 3 for Efficient Electrocatalytic Ammonia Synthesis
Electrocatalytic nitrogen reduction (eNRR) offers a green pathway for the production of NH 3 from N 2 and H 2 O under ambient conditions. Transition metal oxynitrides (TMO x N y ) are among the most promising catalysts but face challenges in achieving a high yield and faradaic efficiency (FE). This work develops a hybrid WO x N y /WO 3 catalyst with a unique heterogeneous interfacial complexion (HIC) structure. This design enables in situ generation and delivery of highly active hydrogen atoms (H*) in acidic electrolytes, promoting nitrogen hydrogenation and the formation of nitrogen vacancies (Nv) on the WO x N y surface. This significantly enhances the selectivity of eNRR for NH 3 synthesis while suppressing the hydrogen evolution reaction (HER). A simple two-step fabrication process─microwave hydrothermal growth followed by plasma-assisted surface nitridation─was developed to fabricate the designed catalyst electrode, achieving an NH 3 yield of 3.2 × 10 –10 mol·cm –2 ·s –1 with 40.1% FE, outperforming most TMN/TMO x N y electrocatalysts. Multiple control experiments confirm that the eNRR follows an HIC-enhanced Mars–van Krevelen (MvK) mechanism.
Electrochemical Dinitrogen Reduction to Ammonia by Mo 2 N: Catalysis or Decomposition?
Not provided.