Effect of Applied Current Density on the Electrodeposition of Ni on Ti Substrate

Siti Norsafurah Ab Malek; Yusairie Mohd

doi:10.4028/www.scientific.net/AMR.748.144

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 748Effect of Applied Current Density on the...

Effect of Applied Current Density on the Electrodeposition of Ni on Ti Substrate

Abstract:

Ni coatings were successfully electrodeposited on Ti substrates using galvanostatic technique. The scanning electron micrography showed a smooth coating with a few round particles formed at current density of-1 mA/cm², whereas the Ti surface was fully covered with round particles consisting of like-worm fibrils when applying higher current densities of-5 and-10 mA/cm². The stability and electrocatalytic activity tests were conducted by cyclic voltammetry and potentiostatic techniques. The results indicate that Ni/Ti catalysts prepared at current densities of-5 and-10 mA/cm² possess high active surface area and exhibit higher electrocatalytic activity performance towards methanol oxidation as compared to Ni/Ti prepared at-1 mA/cm². It was concluded that the deposition current density has significantly influenced the formation of Ni coatings on Ti substrate which consequently affecting the performance of electro-oxidation of methanol. The Ni/Ti catalysts also have good stability for the oxidation process in alkaline solution.

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Periodical:

Advanced Materials Research (Volume 748)

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144-149

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.748.144

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Online since:

August 2013

Authors:

Siti Norsafurah Ab Malek, Yusairie Mohd

Keywords:

Electrocatalytic Activity, Electrodeposition, Methanol Oxidation, Nickel Catalyst, Titanium

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