Vitalizing fuel cells with vitamins: Pyrolyzed vitamin B12 as a non-precious catalyst for enhanced oxygen reduction reaction of polymer electrolyte fuel cells

Sun Tang Chang, Chen Hao Wang, He Yun Du, Hsin Cheng Hsu, Chih Ming Kang, Chia Chun Chen, Jeffrey C.S. Wu, Shi Chern Yen, Wen Fei Huang, Li Chyong Chen, M. C. Lin, Kuei Hsien Chen

研究成果: 雜誌貢獻期刊論文同行評審

93 引文 斯高帕斯(Scopus)

摘要

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-O2 fuel 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.

原文英語
頁(從 - 到)5305-5314
頁數10
期刊Energy and Environmental Science
5
發行號1
DOIs
出版狀態已發佈 - 2012 一月

ASJC Scopus subject areas

  • Environmental Chemistry
  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Pollution

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