Main activities and results 2016

 

Work package 1 – Electrodeposition of porous 3D metallic nanofoams

Task 1.2 – Metallic nanofoams for hydrogen production Electrodeposition of Ni nanofoams

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SEM micrographs for  Ni nanofoams electrodeposited onto stainless steel substrate  (1.54 A/dm2, 3 min.)

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SEM micrographs for  Ni nanofoams electrodeposited onto stainless steel substrate after an initial anodic etching treatment to increase the coating adhesion (2 A/dm2, 1 min.)

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SEM micrograph (left) and EDX spectrum (right) for Ni-Mo (20 wt.% Mo) alloy coating electrodeposited from a citrate-ammonium electrolyte  (7.8 A/dm2, 60oC)

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SEM micrographs for Ni-Mo(20 wt.% Mo) alloy onto Ni nanofoam  (8 A/dm2, 60oC, 10 min.)

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SEM micrographs for Ni-W (approx.19-25 wt.% W) alloy coatings onto Ni nanofoam at 70oC for 30 min. at different applied current densities: (A) 5.5 A/dm2; (B) 6.4 A/dm2; (C) 7.2 A/dm2

nanofoam_r6

SEM micrographs for Ni-Fe (approx.19-25 wt.% Fe) alloy coatings onto Ni nanofoam  (5 A/dm2, 65oC, 15 min.)

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SEM micrographs for Ni-Co (approx.45-55 wt.% Co) alloy coatings onto Ni nanofoam  (0.8 A/dm2, 85oC, 30 min.) using ionic liquids based on choline chloride

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Tafel plots (h-log i) in sea water electrolyte for Ni alloys electrodeposited onto Ni nanofoams t=25oC (10 mV/s)

Tafel slopes values for HER in seawater for various electrodes types at 25oC

Working electrode type Tafel slope, bc (mV/dec)
Ni-Mo directly deposited onto 3D  Ni nanofoam 62±10
Ni-W directly deposited onto 3D  Ni nanofoam 81±10
Ni-Co directly deposited onto 3D  Ni nanofoam 70±10
Ni-Fe metallic foil

(20 wt.%Fe)

 196±10
Ni-Fe directly  deposited onto 3D  Ni  nanofoam

(20 wt.%Fe)

 148±10