Nickel-Based 3D Electrocatalyst Layers for Production of Hydrogen by Water Electrolysis in an Acidic Medium

Recent Developments in Conductive Polymer‐Based Electro‐/Photoelectrocatalytic Materials for Effective Hydrogen/Oxygen Evolution Reactions: A Review

“…The increase in HER activity was attributed to the increase in PAni loading. When comparing mixed Ni-PAni (from this study) with layered Ni/PAni (from the previous study, [85] the mixed Ni-PAni seems to have produced slightly better HER results. Although a thorough explanation of the differences will not be discussed in this review, it is quite possible that the mixed Ni-PAni electrocatalyst allowed better charge transfer to the film surface compared to most of the charge transfer occurring at the Ni-base in the layered Ni/PAni electrocatalyst.…”

“…The combined effect of providing the stage of large surface area and the high conducting nature with polymer introduction was started studied as efficient nanomaterials, For example, Saleh et al. examined the HER potential of layered nickel‐based PAni electrodes [85] . On a GCE substrate, a layer of PAni was electropolymerized.…”

“…The nickel-based polymeric composites were also studied extensively as an active electrocatalytic material for both OER and HER. The combined effect of providing the stage of large surface area and the high conducting nature with polymer introduction was started studied as efficient nanomaterials, For [85] On a GCE substrate, a layer of PAni was electropolymerized. Then a layer of Ni nanoparticles was electrodeposited as a top layer to obtain the Ni/PAni electrode.…”

The electrochemical behaviour of nanocrystalline nickel: A comparison with polycrystalline nickel under the same experimental condition

“…These reports have demonstrated that the effect of nanostructuring on corrosion behaviour varies among metal systems and corrosion environments; hence, it is difficult to predict the electrochemical behaviour of nc-metals from the known properties of their coarse-grained polycrystalline analogues. In comparison with conventional coarse-grained pure metals, the general corrosion resistance of nc-counterparts was mostly decreased, while they showed higher resistance to localized intergranular corrosion [2,[4][5][6][7] because the corrosion pits are distributed uniformly due to an increased volume fraction of the grain boundary.…”

“…Nc-materials have been the subjects of intensive research in recent years [1,2] because of their unique properties and applications in science and technologies. They are characterized by crystallites with a grain size less than 100 nm and a high volume fraction of the grain boundary, which may comprise as much as 50% of the total crystal volume [3].…”