화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.90, 351-357, October, 2020
DOI10.1016/j.jiec.2020.07.034  Export Citation
Enhancements in catalytic activity and duration of PdFe bimetallic catalysts and their use in direct formic acid fuel cells
Seungwon Yang1, Yongjin Chung2, †, Kug-Seung Lee3, †, and Yongchai Kwon1, 4, †
  • 1Graduate School of Energy and Environment, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, 01811 Seoul, Republic of Korea
  • 2Department of Chemical and Biological Engineering, Korea National University of Transportation, 50 Daehak-ro, Chungju, 27469 Chungbuk, Republic of Korea
  • 3Pohang Accelerator Laboratory, 80 Jigok-ro 127 beon-gil, Pohang 37673 Gyeongbuk, Republic of Korea
  • 4Department of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, 01811 Seoul, Republic of Korea
E-mail:, ,
The palladium.iron based bimetallic catalysts (PdxFey/Cs) and facile synthetic method are introduced to enhance the catalytic activity and operational duration for direct formic acid fuel cells. To improve the properties of PdxFey/C catalysts, such as degree of PdFe alloy and its crystallinity, heat treatment is conducted at 600 °C. According to results, the Pd.Fe bond and Fe metal particle are formed after the heat treatment, while iron oxides and Pd particles are observed in the untreated samples. Electrochemical evaluations for measuring the formic acid oxidation reaction rate demonstrates heat treated Pd3Fe1/C (HT-Pd3Fe1/C) is the best catalysts of six samples which are synthesized by using different Pd to Fe ratios (3:1, 1:1, 1:3) before and after heat treatment. This is because the HT-Pd3Fe1/C has high Pd.Fe alloying and Pd contents. Through the heat treatment, the indirect formic acid oxidation reaction way is activated and the resistance to CO poisoning is significantly improved. The maximum power density of direct formic acid fuel cells using HT-Pd3Fe1/C whose open circuit voltage is 0.83 V is 137 mW cm-2, which is 1.6 and 1.9 times higher than that of direct formic acid fuel cells using untreated catalyst and Pd/C.
Keywords:DFAFC;PdFe bimetallic catalyst;IFAOR;Heat treatment;XAS
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