Anisotropic metallic micro- and nanocrystals synthesis and characterization, either in suspension or localized on a surface has potential use in many applications ranging from catalysis, microelectronics, biosensors and solar cells. A simple and versatile electrochemical approach to synthesize plate-like anisotropic copper crystals in presence of shape directing additives has been proposed. SEM, TEM and XRD characterization confirm the anisotropic morphology and crystal structure of synthesized copper particles. Br- ions in the additive adsorbs preferentially to selective crystal faces on copper particles thereby altering the relative crystal growth kinetics leading to anisotropic morphology. Electro-oxidation of methanol is chosen as a model experiment to characterize the superior electro-catalytic properties of anisotropic copper crystals. The broader objective of this work is to develop a non-noble metal based alternative for anode interfaces in direct methanol fuel cells.

Additive-mediated electrochemical synthesis of plate-like anisotropic copper crystals for methanol oxidation

245th National Meeting (2013)

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