Figure 2
XANES spectra acquired at different stages of the discharge during the in situ XAFS experiment on Zn-embedded porous silicon. Metallic zinc was deposited in advance within the porous silicon electrode at a capacity of ∼1.2 C cm−2. (a) Complete XANES spectra of the cell during the dissolution of the zinc; (b) detail of the white line showing the increase of the intensity of the main peak as a consequence of the increase of the dissolved Zn-complex phase during the discharge; (c) detail of the pre-peak shoulder showing the vanishing of the shoulder of the metallic phase as a consequence of the dissolution; in (b) and (c) the arrows show the evolution of the spectra during the discharge (dissolution). |