Characterization of rhenium compounds obtained by electrochemical synthesis after aging process

Electrocatalysis of the hydrogen evolution reaction by rhenium oxides electrodeposited by pulsed-current

“…The variation in the amount of the Re VII species is linked to the relative concentration of the species which produce it. In agreement with this, and with the fact that the H(ReO 4 )H 2 O compound is not an expected product of the electrodeposition (as it arises from the interaction between the Re IV and Re VI species and their environment), it is possible to infer indirectly that the material which electrodeposits on ITO contains the species mentioned in the previously proposed mechanism [18,23]. When comparing the relative surface abundances Re IV : Re VII for each process condition, as shown on The low HER rate is also linked to a low H + adsorption on the ITO surface [26].…”

“…According to the previously reported electrodeposition mechanism [18], the [23]. Table 3 summarizes the values of photoelectron lines for Re found in high-resolution spectra and the corresponding FWHM, apart from values for the relative abundances for each Re species as a function of the electrodeposition process conditions.…”

“…The peak at 41.9 eV was assigned to Re IV in the ReO 2 compound [19,20], the peak at 43.7 eV was assigned to Re VI in the ReO 3 compound [19,21], and the peak at 46.1 eV was assigned to Re VII in the H(ReO 4 )H 2 O compound [21][22][23].…”

Chemical stability of superhard rhenium diboride at oxygen and moisture ambient environmental conditions prepared by mechanical milling

“…Also, one absorption peak at 2260/cm ‐1 , (B‐H) which indicates the reductive properties of ReB 2 particles . The absorption peak at 913/cm ‐1 , (Re‐O) confirms the oxidative properties of this material . A weak absorption peak at 642/cm ‐1 , (B‐B) can be associated with the layered structure of ReB 2 .…”

“…[22][23][24] The absorption peak at 913/cm -1 , (Re-O) confirms the oxidative properties of this material. 25,26 A weak absorption peak at 642/cm -1 , (B-B) can be associated with As shown in Figure 5, XRD analysis indicates that ReB 2 is unstable at oxygen and moisture ambient environmental conditions, which was corroborated by TGA-DSC, FTIR, and Raman analysis. To evaluate further degradation the ReB 2 sample was analyzed by XRD after 26 months of storage at oxygen and moisture ambient environmental conditions; the diffractogram is shown in Figure 9.…”