Journal
ENERGY
Volume 88, Issue -, Pages 563-571Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2015.05.085
Keywords
Microfluidic fuel cell; Flow-through porous electrode; Dimensionless computational model; Electrochemical reaction zone; Partial modification
Categories
Funding
- GRF Project [9042044]
- SFC/RGCJRS Project [9051202]
- Research Grant Council, University Grants Committee, Hong Kong [PolyU 5326/12E]
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The use of flow-through porous electrodes is identified as a promising approach to enhance the performance of microfluidic fuel cell (MFC). In this study, a dimensionless computational model is developed to analyze the distribution characteristics of the electrochemical reactions in flow-through porous electrodes of MFC. One important finding is that the electrochemical reactions mainly occur in the vicinity of the anode and cathode outlets. Based on this observation, the new design of partial modification at reactive sites is proposed to reduce the MFC cost. It is found that MFC with partial modification can achieve comparable performance with that of conventional full electrode modification, demonstrating the feasibility of partial modification method. The partial modification also offers a promising alternative to avoid unwanted secondary reaction, such as hydrogen evolution. (C) 2015 Published by Elsevier Ltd.
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