High surface area coatings for hydrogen evolution cathodes prepared by magnetron sputtering

Abstract

Available online xxx Keywords:Magnetron sputtering High surface area coatings Catalyst coatingsWater electrolysis a b s t r a c t A novel magnetron sputtering technique is described for the deposition of durable, high surface area metal and alloy deposits (thickness up to several microns) onto nickel and steel substrates. The materials deposited include platinum, nickel, nickel alloys and steels.The structure of the deposits is characterised and it is demonstrated that some high surface area coatings are efficient and effective electrocatalysts for hydrogen evolution in alkaline media and coated mesh electrodes have been tested in a modern water electrolyser configuration.

A novel sputtered Pd mesh architecture as an advanced electrocatalyst for highly efficient hydrogen production

“…Further details of the Pd sputtered anode surface morphology (Figure 2d and 2e) show the presence of interconnected porosities shaping the contour of the typical microstructure of hierarchically highly porous films obtained by sputtering under low ad-atom mobility [19,20]: bundles of vertically aligned nanofibers, which domed tops are visible on Figure 2e, and groups of bundles building up columns, which cross-section is represented by the widest closed "cracks". Overall degree of porosity has been estimated close to 30%.…”

Наноструктурированные покрытия Ni на пористом оксиде алюминия: морфология, химическая структура и катодные свойства

“…Эффективность выделения водорода и, как результат, количество полученного водорода зависят не только от природы катодного материала, но и площади активной поверхности [13][14][15]. Наибольшую площадь поверхности могут иметь материалы, имеющие высокоразвитую поверхность.…”