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Issue 10, 2014
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Vitamin E assisted polymer electrolyte fuel cells

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Abstract

Due to breathing O2 from the air, vertebrates can suffer from diseases originating from oxidative stress. These, however, can be relieved by various antioxidants. Similarly, proton exchange membrane fuel cells (PEMFCs) suffer from the major problem of limited lifetimes, caused by chemical attacks by reactive oxygen species (ROS). Inspired by vertebrates, we herein show that the incorporation of a natural antioxidant, α-tocopherol (α-TOH), the most abundant component of vitamin E, which acts as a free radical scavenger, enables a maintenance of performance for PEMFCs which is impossible to achieve for fuel cells in the absence of α-TOH. It is notable that oxidized α-TOH can in turn be reduced by permeated H2 during fuel cell operation, resulting in its regeneration. Such reversibility leads to a chemical circulation system, which not only ensures the effective recycling of α-TOH, but also permits efficient protection of proton exchange membranes (PEMs) and thus allows their long-term operation.

Graphical abstract: Vitamin E assisted polymer electrolyte fuel cells

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Supplementary files

Article information


Submitted
09 Jun 2014
Accepted
17 Jul 2014
First published
17 Jul 2014

Energy Environ. Sci., 2014,7, 3362-3370
Article type
Paper
Author version available

Vitamin E assisted polymer electrolyte fuel cells

Y. Yao, J. Liu, W. Liu, M. Zhao, B. Wu, J. Gu and Z. Zou, Energy Environ. Sci., 2014, 7, 3362
DOI: 10.1039/C4EE01774A

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