The electrochemical impedance spectroscopy (EIS) diagram in Supplementary Fig. 23 shows smaller impedance of Mg–N–C as comparing to Pt/C. According to the rotating ring disk electrode (RRDE) test result shown in Fig. 4c, the electron-transfer rate for Mg–N–C is close to 4, similar ...
Fig. 5: Heavy Mg isotopes in arc lavas can be attributed to the dehydration of subducting hydrated mantle. aPhase diagram of hydrous peridotitic minerals from thermodynamic modeling84. Dots show the pressures and temperatures of the slab Moho beneath each corresponding arc63.bδ26Mg values for f...
[207] derived the full MgxV2O5 phase diagram for 0 < x < 1. MgxV2O5 exists as a two-phase equilibrium between α-V2O5 and δ-V2O5. However, they note that a metastable phase, denoted as ε-V2O5, undergoes Mg ordering when V2O5 is half magnesiated (Mg0.5V2O5), and may dominate since...
It is noted that Ni and Mg do not form IMCs at this composition but they do form a eutectic structure of Mg + Mg2Ni at 10at.% Ni, as seen in the Mg-Ni phase diagram in Fig. 1(c). A zoomed-in view of this layer shown in Fig. 14 reveals a lamellar eutectic structure. This ...
The interactions at the magnesium-water interface can also be observed in the electronic structure, as vividly illustrated in Bader charge analyses for the intermediate images of the NEB simulation (Fig.2, right). Water molecules bound to top sites act here as electron acceptors, whereas those in...
The origins of the electronic conductivity observed can be related to: (i) the existence of intrinsic defects, e.g., Mg, Sc, or Se vacancies, or (ii) the presence of undesired electron conducting secondary phases in the as-prepared MgSc2Se4 sample. The 25Mg NMR results do not indicate...
This subsequently leads to an increase in the electron bombardment of the molecular chains and a gradual erosion of the internal structure. As already mentioned, the presence of nanoparticles also affects the mechanical properties. Kiaei et al. [137] also verified this for MgO. They found that,...
(b) partial relaxation at n = 12 (nMg/Ca1) and formation of 3 Mg–O bonds; (c) complete relaxation at n = 16 (nMg/Ca1) and formation of 6 Mg–O bonds; (d) initial configuration and numbers of oxygen ions involved in the formation of bonds; (e) diagram of changes in distances...
Figure 6. Corrosion mechanism diagram of anodic oxidation coating. Microscopically, the nature of the oxide layer itself is crucial. Composed of magnesium oxide (MgO), it has a dense crystalline structure, is less reactive than bare magnesium, and is more stable [62]. Anodizing leads to passi...
Figure 4. Schematic diagram to show the forces and their relation to MEP: the total force on each image 𝐅NEB𝑖FiNEB is the sum of the true force perpendicular to the local tangent 𝐅⊥𝑖Fi⊥ and the spring force along the local tangent 𝐅S||𝑖FiS||. Reproduced with permission...