Nickel nanocatalysts supported on sulfonated polyaniline: potential toward methanol oxidation and as anode materials for DMFCs
By Das, Suparna; Dutta, Kingshuk & Kundu, Patit P.
Published in J. Mater. Chem. A
The Royal Society of Chemistry
2015
Abstract
The development of potential anode catalysts and catalyst supporting matrices for application in direct methanol fuel cells (DMFCs) has been an active area of research for the last couple of decades. The conventionally used Pt catalyst suffers from (a) high cost, (b) limited abundance and (c) the catalyst poisoning effect induced by the in situ generated carbon monoxide. In this work, a comparatively less expensive and more abundant Ni metal catalyst [supported on Vulcan carbon, polyaniline (PAni) and partially sulfonated PAni (SPAni)] has been utilized as a potential alternative to the Pt metal catalyst for the oxidation of methanol. SPAni emerged as the best matrix for the deposited Ni catalyst nanoparticles. This combination generated a peak current density of 306 [small mu ]A cm-2 at +0.57 V. In addition, the Ni/SPAni catalyst produced a higher IF/IB ratio compared to the commercial Pt-Ru/C catalyst. Furthermore, a current density of 135 mA cm-2 (at +0.2 V potential) and a maxim
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