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High-Surface Step Density on Dendritic Pd Leads to Exceptional Catalytic Activity for Formic Acid Oxidation

Patra, S and Viswanath, B and Barai, K and Ravishankar, N and Munichandraiah, N (2010) High-Surface Step Density on Dendritic Pd Leads to Exceptional Catalytic Activity for Formic Acid Oxidation. In: ACS Applied Materials & Interfaces, 2 (11). pp. 2965-2969.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/am100647u

Abstract

Dendrite Pd with corrugated surfaces, obtained by a novel AC technique, exhibits an exceptionally high catalytic activity for the oxidation of formic acid because of the presence of a high density of surface steps. The formation of twinned dendrites leads to a predominance of exposed 111 facets with a high density of surface steps as evident from high resolution electron microscopy investigations. These surface sites provide active sites for the absorption of the formic acid molecules, thereby enhancing the reaction rate. Control experiments by varying the time of deposition reveal the formation of partially grown dendrites at shorter times indicating that the dendrites were formed by growth rather than particle attachment. Our deposition method opens up interesting possibilities to produce artisotropic nanostructures with corrugated surfaces by exploiting the perturbations involved in the growth process.

Item Type: Editorials/Short Communications
Additional Information: Copyright of this article belongs to American Chemical Society.
Keywords: Atep density; Pd dendrite; electrocatalytic activity; formic acid oxidation; AC technique; electrodeposition.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 21 Dec 2010 11:40
Last Modified: 21 Dec 2010 11:40
URI: http://eprints.iisc.ernet.in/id/eprint/34593

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