A model electrode of well-defined geometry prepared by direct laser-induced decoration of nanoporous templates with Au-Ag@C nanoparticles
Schlicht S, Kireev A, Vasileva A, Grachova EV, Tunik SP, Manshina AA, Bachmann J (2017)
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2017
Journal
Publisher: IOP PUBLISHING LTD
Book Volume: 28
Journal Issue: 6
Abstract
We present an original type of model electrode system consisting of bimetallic Au-Ag nanoparticles embedded in an amorphous carbon matrix with an extremely well-defined geometry of parallel, straight, cylindrical macropores. The samples are prepared in one step by direct laser deposition of the metal/carbon composite onto the inner walls of a porous 'anodic' alumina matrix serving as a template. The coating is homogeneous from top to bottom of the pores, and the amount of material deposited can be tuned by the duration of the deposition procedure. As a test system, we demonstrate that a bimetallic Ag-Au@C system is catalytically active for the electrochemical oxidation of glucose in alkaline solution, the anodic reaction of a direct glucose fuel cell. Furthermore, the electrocatalytic current density increases with the amount of Ag-Au@C NPs deposited, up to a point at which the pores are clogged with it. This type of model system allows for the systematic study of geometric effects in fuel cell electrodes. It can be generalized to a number of different nanoparticle compositions, and thereby, to various electrocatalytic reactions.
Authors with CRIS profile
Stefanie Schlicht
Lehrstuhl für Chemistry of thin film materials
Julien Bachmann
Lehrstuhl für Chemistry of thin film materials
Involved external institutions
Russian Federation (RU)How to cite
APA:
Schlicht, S., Kireev, A., Vasileva, A., Grachova, E.V., Tunik, S.P., Manshina, A.A., & Bachmann, J. (2017). A model electrode of well-defined geometry prepared by direct laser-induced decoration of nanoporous templates with Au-Ag@C nanoparticles. Nanotechnology, 28(6). https://dx.doi.org/10.1088/1361-6528/aa536a
MLA:
Schlicht, Stefanie, et al. "A model electrode of well-defined geometry prepared by direct laser-induced decoration of nanoporous templates with Au-Ag@C nanoparticles." Nanotechnology 28.6 (2017).
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