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

Autori
Bou-Saleh, Ziad ; Omanović, Saša

Izvornik
Journal of nanoscience and nanotechnology (1533-4880) 9 (2009), 4; 2469-2479

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
nickel; hydrogen; water electrolysis; electrocatalysis; nanoparticles; polyaniline; carbon support; three-dimensional layer

Sažetak
Electrocatalytic activity of three-dimensional nickel-based layers in the hydrogen evolution reaction (HER) was investigated in an acidic medium. It was demonstrated that patterning of a glassy carbon electrode substrate with a 3Dpoly aniline (PANI) matrix is a convenient way of increasing the electrocatalytically active surface area of electrodeposited Ni, and hence its apparent electrocatalytic activity. The optimized PANI/Ni electrocatalyst layer showed a significantly higher activity in the HER then a two-dimensional control Ni-plate surface. It was also demonstrated that it is possible to produce a Ni-based HER electrocatalyst layer by synthesizing Ni nanoparticles and supporting them on Vulcan carbon. This electrocatalyst also offered a significantly higher electrocatalytic activity in the HER then the control surface, but lower then the optimized PANI/Ni electrocatalyst. The electrocatalytic activity of the optimized PANI/Ni layer was also compared to the activity of a 3D catalyst produced by coating a porous RVC cube substrate with Ni. This electrocatalyst showed the highest HER electrocatalytic activity among the investigated layers when tested under potentiodynamic polarization conditions. However, under the potentiostatic conditions, the optimized PANI/Ni layer showed the highest electrocatalytic activity.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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