A model electrode of well-defined geometry prepared by direct laser-induced decoration of nanoporous templates with Au-Ag@C nanoparticles

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Schlicht S, Kireev A, Vasileva A, Grachova EV, Tunik SP, Manshina AA, Bachmann J
Zeitschrift: Nanotechnology
Verlag: IOP PUBLISHING LTD
Jahr der Veröffentlichung: 2017
Band: 28
Heftnummer: 6
ISSN: 0957-4484


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.



FAU-Autoren / FAU-Herausgeber

Bachmann, Julien Prof.
Lehrstuhl für Chemistry of thin film materials
Schlicht, Stefanie
Lehrstuhl für Chemistry of thin film materials


Autor(en) der externen Einrichtung(en)
Saint Petersburg State University


Zitierweisen

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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Zuletzt aktualisiert 2018-10-08 um 20:55