Product Code: ICAL09_509

Investigation on the Electrochemical Catalysis Properties of NI-Decorated Nanoporous Copper Formed by Hybrid Laser Deposition
Authors:
Yu Gu, Tsinghua University, Dept of Mechanical Engineering; Beijing Peoples Republic of China
Mingxing Ma, Tsinghua University, Dept of Mechanical Engineering; Beijing Peoples Republic of China
Minlin Zhong, Tsinghua University; Beijing Peoples Republic of China
Wenjin Liu, Tsinghua University, Dept of Mechanical Engineering; Beijing Peoples Republic of China
Changsheng Dong, -; -
Yide Kan, -; -
Presented at ICALEO 2009

Nano-alloys or nano-structure often display novel physical, chemical and mechanical properties. It is of great scientific and engineering meanings to deposit micro-nano structure on macro-component surface to locally achieve nano-properties for potential applications. Laser deposition offers a promising approach to deposit a designed structure with designed composition on any location of a component. We have previously reported the formation of 30 to 50nm porous structure by laser deposition of Cu-Mn alloy coating on carbon steel and subsequently dealloying process in 0.1M hydrochloric acid solution. The porosity and specific surface area reaches 84.5 % and 65.3 m2/g respectively. The as-formed nano porous Cu-Mn structure was further processed by electroless plating of Ni to obtain Nanoporous Cu-Ni composite coatings with an average pore size of 30nm, porosity of 50% and specific surface area of 40m2/g. This paper focuses on the investigation on the electrochemical catalysis properties of the nanoporous copper coating and the nanoporous Cu-Ni composite coating by using Cyclic voltammetry test. The results indicate that both the nanoporou Cu coatings and the mesoporous Cu-Ni composite coatings show catalysis properties as hydrogen storage electrode. Their catalysis properties change with the composition of the nanoporous structure and the Ni plating time with an optimized oxidation peak current density up to 60 mA/cm2.