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Received June 4, 2007
Accepted February 14, 2008
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Formic acid oxidation by carbon-supported palladium catalysts in direct formic acid fuel cell
Jae Ho Choi
Soon Young Noh
Sam Duck Han
Soo Kyung Yoon1
Chang-Soo Lee
Taek-Sung Hwang
Young Woo Rhee†
Department of Chemical Engineering, Chungnam National University, Daejeon 305-764, Korea 1Ajou University, Suwon 443-749, Korea
Korean Journal of Chemical Engineering, September 2008, 25(5), 1026-1030(5), 10.1007/s11814-008-0167-2
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Abstract
The oxidation of formic acid by the palladium catalysts supported on carbon with high surface area was investigated. Pd/C catalysts were prepared by using the impregnation method. 30 wt% and 50 wt% Pd/C catalysts had a high BET surface area of 123.7 m2/g and 89.9 m2/g, respectively. The fuel cell performance was investigated by changing various parameters such as anode catalyst types, oxidation gases and operating temperature. Pd/C anode catalysts had a significant effect on the direct formic acid fuel cell (DFAFC) performance. DFAFC with Pd/C anode catalyst showed high open circuit potential (OCP) of about 0.84 V and high power density at room temperature. The fuel cell with 50 wt% Pd/C anode catalyst using air as an oxidant showed the maximum power density of 99 mW/cm2. On the other hand, a fuel cell with 50 wt% Pd/C anode catalyst using oxygen as an oxidant showed a maximum power density_x000D_
of 163 mW/cm2 and the maximum current density of 590 mA/cm2 at 60 ℃.
Keywords
References
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