Electroless decoration of macroscale foam with nickel nano-spikes: A scalable route toward efficient catalyst electrodes
By Zhao, Xin; Muench, Falk; Schaefer, Sandra; Br
Published in Electrochemistry Communications
NULL
2016
Abstract
Abstract Electroless deposition of anisotropic catalyst layers is introduced as an efficient approach to fabricate high-performing multiscale electrode architectures. In the present study, a biomass-derived, solidified foam is coated with nickel nano-spikes. This results in an amplification of the surface area and an introduction of catalytic functionality, while the favorable mass transfer properties of the porous support are retained. Both the substrate and the metal film are produced using simple, readily scalable processes. The support is prepared from liquefied sawdust by self-foaming, and nickel deposition is performed by immersion in a hydrazine-based plating bath. The favorable functional properties of the nickel-coated foam are demonstrated in enzyme-free glucose sensing. Due to the large surface area and the high activity of the nickel nanofilm, an outstanding sensitivity of 8.1 mA mM? 1 cm? 2 and a low detection limit of 60 nM were achieved.
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