Nitrogen Magnetic Resonance Spectroscopy

Mooney, E.F.; Winson, P.H.

doi:10.1016/s0066-4103(08)60321-x

Cited by 20 publications

(25 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At present, 15 N‐NMR spectroscopy is theoretically feasible for the detection of 15 NO 3 − . However, the low concentration of nitrate produced and the unfavorable NMR properties of 15 N (low gyromagnetic ratio and long T1 relaxation constants) require a long‐term test to accumulate sufficient products [43] . A previous experiment on NOR was conducted for 50 h (at least 100 ppm of 15 NO 3 − ) to meet the detection limits of 15 N‐NMR spectroscopy [11b] .…”

Section: Recommended Test Protocol For Electrocatalytic Normentioning

confidence: 99%

Electrochemical Synthesis of Nitric Acid from Nitrogen Oxidation

et al. 2022

View full text Add to dashboard Cite

Nitric acid is widely applied in agriculture and industry. The present manufacturing process via a combination of the Haber–Bosch process and the Ostwald oxidation process is accompanied by massive energy consumption and greenhouse gas emissions. The direct electrocatalytic nitrogen oxidation reaction (NOR) to nitric acid is a promising alternative, especially when it is driven by renewable energy sources. The standardization of performance evaluation is the prerequisite for the design and synthesis of efficient electrocatalysts for NOR. In this context, this Minireview first discusses the history of the development of HNO3 manufacturing and the possible reaction mechanisms for electrocatalytic NOR. Then, a strict protocol for electrochemical NOR experiments is recommended. Finally, general research targets associated with techno‐economic analysis, challenges, and prospects for NOR are summarized for future studies.

show abstract

Section: Recommended Test Protocol For Electrocatalytic Normentioning

confidence: 99%

Electrochemical Synthesis of Nitric Acid from Nitrogen Oxidation

et al. 2022

View full text Add to dashboard Cite

show abstract

“…15 Nnuclear magnetic resonance ( 15 N-NMR) of the 15 N-urea electrolysis products was also measured, but only 15 N-urea and 15 NO 2 À were captured at chemical shifts of 76.71 and 609.85 ppm, respectively (Figure S2f). [11] Thea bsence of 15 NO 3 À implied the current sensitivity limitation of the 15 NNMR for detecting sub-ppm level products during urea electrolysis.…”

mentioning

confidence: 99%

Deciphering and Suppressing Over‐Oxidized Nitrogen in Nickel‐Catalyzed Urea Electrolysis

Liu

et al. 2021

Angewandte Chemie

View full text Add to dashboard Cite

Urea electrolysis is ap rospective technology for simultaneous H 2 production and nitrogen suppression in the process of water being used for energy production. Its sustainability is currently founded on innocuous N 2 products; however,w ed iscovered that prevalent nickel-based catalysts could generally over-oxidizeu rea into NO 2 À products with % 80 %F aradaic efficiencies,p osing potential secondary hazards to the environment. Trace amounts of over-oxidized NO 3À and N 2 Owere also detected. Using 15 Nisotopes and urea analogues,w ed erived an itrogen-fate network involving aN O 2 À -formation pathwayv ia OH À -assisted C À Nc leavage and two N 2 -formation pathwaysv ia intra-and intermolecular coupling.D FT calculations confirmed that C À Nc leavage is energetically more favorable.I nspired by the mechanism, ap olyaniline-coating strategy was developed to locally enrich urea for increasing N 2 production by af actor of two.T hese findings provide complementary insights into the nitrogen fate in water-energy nexus systems.

show abstract

“…3). This excess broadening can be attributed to incomplete quadrupolar relaxation of the 14N spin states, and since 3JNccH is known to be larger than 2JNc H in ammonium salts the high-field component can be assigned to the benzylic protons on C(7) (Mooney & Winson, 1969;Bustard & Egan, 1971;Bailey & By, 1975). The side-chain multiplet was analysed with an interactive computer and the vicinal coupling constants (JAn and JAn,), their sum (N) and the signal separation (~AB) are given in Table 4.…”

Section: /Csmentioning

confidence: 99%