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Wang, Ting, et al. Fuel 341 (2023): 127736.
L-lysine has demonstrated exceptional utility as a structure-directing agent in the synthesis of highly dispersed Rh-based catalysts for steam reforming reactions. In a recent study, L-lysine was employed to assist the deposition precipitation (LDP) method for preparing Rh/CeO₂ catalysts, where its chelating and templating properties enabled precise control over metal dispersion and surface characteristics. The optimized Rh/CeO₂(LDP-1) catalyst, with a molar ratio of L-lysine to Rh of 1:1, exhibited superior catalytic performance in the steam reforming of toluene-an aromatic hydrocarbon model compound for biomass tar and fuel reforming.
The enhanced activity and stability of this catalyst are attributed to several L-lysine-induced improvements: increased Rh dispersion, higher surface Rh⁰ content, and a greater concentration of oxygen vacancies on CeO₂ support. These properties collectively facilitate C-C and C-H bond scission and promote H₂O activation for reactive oxygen species generation, thereby improving hydrogen yield and suppressing carbon deposition.
Mechanistic investigations revealed that the formation of a dual-site catalytic system supports a pathway involving CHO intermediates for CO, CO₂, and H₂ generation. Compared to conventional methods, the L-lysine-assisted approach yielded catalysts with superior anti-coking resistance and thermal stability, confirming L-lysine's critical role in tailoring catalytic interfaces for reforming reactions. This study underscores L-lysine's potential in the rational design of advanced metal-supported catalysts.
Xu, Ang, et al. Chemical Engineering Journal 509 (2025): 161289.
L-Lysine has been utilized as a functional coating material for modifying carbon cloth (CC) electrodes to improve the performance of aqueous supercapacitors. The experimental procedure centers on the electrodeposition of L-Lysine to create a self-buffering surface that effectively regulates the electrode/electrolyte interface microenvironment.
In this study, 0.1 mmol of L-Lysine was first dissolved in 100 mL of anhydrous ethanol, followed by the addition of 0.01 mol lithium perchlorate (LiClO₄) as the supporting electrolyte. The resulting solution was thoroughly stirred to obtain a homogeneous deposition electrolyte.
Electrodeposition was carried out in a conventional three-electrode system, where the carbon cloth loaded with lithium (CC-Li) served as the working electrode, a platinum wire as the counter electrode, and an Ag/AgCl electrode as the reference. Cyclic voltammetry (CV) was applied in the potential range of 0 to 1.9 V at a scan rate of 10 mV·s⁻¹ for 10 cycles to deposit the L-Lysine coating.
Post-deposition, the modified electrodes were rinsed with deionized water to remove residual chemicals and stored in 10 mL of deionized water for subsequent use. Electrodes were labeled as CC-Li-Ly-x-y, where "x" denotes the concentration of L-Lysine and "y" the number of deposition cycles. This precise and reproducible process demonstrates L-Lysine's versatility in electrode interface engineering for high-performance supercapacitor systems.
Tabassum, A., Ata, S., Alwadai, N., Mnif, W., Ali, A., Nazir, A., & Iqbal, M. (2024). iScience, 27(12).
L-Lysine was employed as a structure-directing surfactant in the hydrothermal synthesis of nickel-cobalt (NiCo) bimetallic oxides directly grown on nickel foam for efficient hydrogen and oxygen evolution reactions (HER and OER). The presence of L-Lysine significantly influenced the morphology and electrochemical performance of the final electrocatalysts.
In a typical synthesis, 1.5 × 1 cm nickel foam pieces were cleaned ultrasonically with 3 M HCl, acetone, ethanol, and deionized water, then dried at 100 °C. A solution containing 5 mmol each of Ni and Co salts, 12 mmol urea, and 6 mmol ammonium fluoride was prepared in 50 mL deionized water. L-Lysine (0.05 g) was added as a surfactant alongside CTAB for comparison. After 30 minutes of magnetic stirring, the mixture and nickel foam substrates were sealed in a 100 mL Teflon-lined autoclave and heated at 150 °C for 5 hours.
Following the hydrothermal treatment, the samples were washed with ethanol and water, dried at 80 °C for 3 hours, and calcined at 300 °C for 2 hours. SEM imaging revealed a distinct needle-like morphology in the L-Lysine-assisted NiCo oxide, linked to improved surface area and catalytic activity. The resulting catalyst exhibited a low onset potential (83 mV for HER) and enhanced current density, highlighting L-Lysine's critical role in tailoring nanostructures for alkaline water electrolysis.
What is the molecular formula of L-lysine?
The molecular formula of L-lysine is C6H14N2O2.
What are the synonyms of L-lysine?
The synonyms of L-lysine are lysine, 56-87-1, lysine acid, and h-Lys-oh.
What is the molecular weight of L-lysine?
The molecular weight of L-lysine is 146.19 g/mol.
What is the role of L-lysine?
L-lysine has various roles, including being a micronutrient, a nutraceutical, an anticonvulsant, an Escherichia coli metabolite, a Saccharomyces cerevisiae metabolite, a plant metabolite, a human metabolite, an algal metabolite, and a mouse metabolite.
Is L-lysine an essential amino acid?
Yes, L-lysine is an essential amino acid, meaning that humans cannot synthesize it.
What are the posttranslational modifications of L-lysine?
Common posttranslational modifications of L-lysine include methylation, acetylation, and hydroxylation.
What is the IUPAC name of L-lysine?
The IUPAC name of L-lysine is (2S)-2,6-diaminohexanoic acid.
What is the InChIKey of L-lysine?
The InChIKey of L-lysine is KDXKERNSBIXSRK-YFKPBYRVSA-N.
Is L-lysine found in or produced by Escherichia coli?
Yes, L-lysine is found in or produced by Escherichia coli (strain K12, MG1655).
What is the CAS number of L-lysine?
The CAS number of L-lysine is 56-87-1.
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