We present a facile method for the rational design of highly exfoliated two-dimensional Ti ₃ C ₂ T _x nanosheets (T _x = O, OH, and F) doped with Cu (Cu/Ti ₃ C ₂ T _x ) for electrochemical CO ₂ reduction to formic acid at low Cu content of ∼1 wt%.

The impact of AEO7 surfactant on the corrosion inhibition of carbon steel (C-steel) in 0.5 M HCl solution at temperatures between 20 °C and 50 °C was elucidated using weight loss and different electrochemical techniques. The kinetics and thermodynamic parameters of the corrosion and inhibition processes were reported. The corrosion inhibition efficiency (IE%) improved as the concentration of AEO7 increased. In addition, a synergistic effect was observed when a concentration of 1 × 10⁻³ mol L⁻¹or higher of potassium iodide (KI) was added to 40 µmol L⁻¹of the AEO7 inhibitor where the corrosionIE% increased from 87.4% to 99.2%. Also, it was found that the adsorption of AEO7 surfactant on C-steel surface followed the Freundlich isotherm. Furthermore, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurements indicated that AEO7 was physically adsorbed on the steel surface. The surface topography was examined using an optical profilometer, an atomic force microscope (AFM), and a scanning electron-microscope (SEM) coupled with an energy dispersion X-ray (EDX) unit. Quantum chemical calculations based on the density functional theory were performed to understand the relationship between the corrosionIE% and the molecular structure of the AEO7 molecule.

Li-ion batteries (LIBs) and Na-ion batteries (SIBs) are deemed green and efficient electrochemical energy storage and generation devices; meanwhile, acquiring a competent anode remains a serious challenge. Herein, the density-functional theory (DFT) was employed to investigate the performance of V₄C₃ MXene as an anode for LIBs and SIBs. The results predict the outstanding electrical conductivity when Li/Na is loaded on V₄C₃. Both Li_2xV₄C₃ and Na_2xV₄C₃ (x = 0.125, 0.5, 1, 1.5, and 2) showed expected low-average open-circuit voltages of 0.38 V and 0.14 V, respectively, along with a good Li/Na storage capacity of (223 mAhg⁻¹) and a good cycling performance. Furthermore, there was a low diffusion barrier of 0.048 eV for Li_0.0625V₄C₃ and 0.023 eV for Na_0.0625V₄C₃, implying the prompt intercalation/extraction of Li/Na. Based on the findings of the current study, V₄C₃-based materials may be utilized as an anode for Li/Na-ion batteries in future applications.