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Title: Vitalizing fuel cells with vitamins: pyrolyzed vitamin B12 as a non-precious catalyst for enhanced oxygen reduction reaction of polymer electrolyte fuel cells
Authors: 國立臺灣師範大學化學系
S.-T. Chang
C.-H. Wang
H.-Y. Du
C.-M. Kang
Chia-Chun Chen
J.C.-S. Wu
S.-C. Yen
W.-F. Huang
L.-C. Chen
M.-C. Lin
K.-H. Chen
Issue Date: 1-Jan-2012
Publisher: Royal Society of Chemistry
Abstract: The limited natural abundance and high cost of Pt has been a major barrier in its applications for hydrogen or methanol fuel cells. In this work, based on the pyrolyzed corrin structure of vitamin B12 (py-B12/C), it is reported to produce superior catalytic activity in the oxygen reduction reaction (ORR) with an electron transfer number of 3.90, which is very close to the ideal case of 4. The H2–O2fuel cell using py-B12/C provides a maximum power density of 370 mW cm−2 and a current density of 0.720 A cm−2 at 0.5 V at 70 °C. Calculations based on density functional theory suggests that the corrin complex with a low-symmetric structure offers a much preferable path for the ORR, which is not applicable to the porphyrin with a high-symmetric structure. The long-term stability and high ORR activity of py-B12/C make it a viable candidate as a Pt-substitute in the ORR.
ISSN: 1754-5692
Other Identifiers: ntnulib_tp_C0301_01_080
Appears in Collections:教師著作

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