A significant improvement in material of foam

Abstract

a b s t r a c tIn investigation of different materials for electrodes used in electrolysers for hydrogen production, nickel foam shows wide interests in hydrogen scientific community. This paper brings novel results of performed experiments on pure nickel foam and nickel foam silver coated. The electrochemical behavior of chosen material in high concentrated alkaline media was studied using potentiostatic and potentiodynamic DC and AC electrochemical methods: linear polarization, electrochemical impedance spectroscopy. It was shown that using silver coatings enable higher hydrogen generation. There is defined linear region of the hydrogen production with evidence that an increasing of the electrodes overvoltage decreases the resistance to the charge transfer.

Kinetics of the hydrogen evolution on nickel in alkaline solution: new insight from rotating disk electrode and impedance spectroscopy analysis

“…2 shows a typical cyclic voltammogram obtained for Ni f in 1 M KOH solution, where the onset potential for the hydrogen evolution, c.a. À1.1 V (vs. SCE) is in good agreement with the known value for nickel [33,34]. A zoom of the CV is shown in the insert on Fig.…”

Evaluation of different Ni–semiconductor composites as electrodes for enhanced hydrogen evolution reaction

“…45 In Figure 4, all Ni|SC electrodes seem to have OP values close to −1.1 V (vs SCE), which is consistent with the OP value estimated in literature for bare nickel. 46,47 Remarkably, we can note an increment in the hydrogen evolution current at −1.5 V (vs. SCE) by incorporating Bi2O3 or WO3 into the Ni electrocatalyst structure. In these cases, we found values of j of about 1.5 times higher than the one measured with Ni|Watts catalyst.…”

Effects of electrochemical reaction and surface morphology on electroactive surface area of porous copper manufactured by Lost Carbonate Sintering

“…Characterisation of surface area is therefore essential, especially for porous electrodes. The surface area of a number of porous metals manufactured by different processes, including porous Ni 9,10 and Au, 11 have been measured by BET. However, the active surface area of porous electrodes has been found to be sensitive to the electrochemical process involved.…”

“…However, very little research, apart from ref. 10, has been carried out to date on the surface area of porous metals manufactured by powder metallurgy based methods and even less on how the surface area is affected by thermal and chemical treatments.…”