Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 37, Issue 5, Pages 4590-4596Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2011.05.174
Keywords
Composite; Nickel; Molybdenum carbide; Anodic electrocatalyst; Microbial fuel cell; Klebsiella pneumoniae
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A composite of nickel and beta-molybdenum carbide (Ni/beta-Mo2C) was prepared from solution derived precursor and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and Brunauer-Emmett-Teller (BET). The activity of Ni/beta-Mo2C as noble-metal-free anodic electrocatalyst of microbial fuel cell (MFC) based on Klebsiella pneumoniae (K. pneumoniae) was investigated by electrochemical measurements. The results from voltammetric measurements show that Ni/beta-Mo2C has high electrocatalytic activity towards the oxidation of formate, lactate, ethanol, and 2,6-di-tert-butyl-p-benzoquinon (2,6-DTBBQ), which are the main metabolites of K. pneumoniae. The results from polarization curve measurement indicate that the MFC using Ni/beta-Mo2C as anodic electrocatalyst delivers a higher power density than the MFC using beta-Mo2C as anodic electrocatalyst. Ni/beta-Mo2C provides the MFC based on K. pneumoniae with a novel noble-metal-free anodic electrocatalyst of high activity. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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