Modification of palladium-based catalysts by chalcogenes for direct methanol fuel cells |
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| Affiliation: | 1. Rare Isotope Science Project, Institute for Basic Science, Daejeon 305-811, Republic of Korea;2. School of Electrical Engineering, Anam-dong, Seongbuk-gu, Korea University, Seoul 136-701, Republic of Korea;3. Quantum-Functional Semiconductor Research Center, Dongguk University, Seoul 100-715, Republic of Korea;1. Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, People’s Republic of China;2. School of Environmental Ecology, Jiangsu Open University, Nanjing 210036, People’s Republic of China;1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, PR China;2. National Institute of Metrology, Beijing 100013, PR China;1. School of Chemistry and Chemical Engineering, Harbin Institute of Technology, No. 92 West-Da Zhi Street, Harbin, 150001 China;2. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), No. 149-1 Zhuzhou Road, Qingdao, 266101 China;1. Cinvestav Unidad Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial Ramos Arizpe, Coahuila, C.P. 25900, Mexico;2. Tecnológico Nacional de México, Instituto Tecnológico de Tláhuac II, Camino Real 625, Col. Jardines Del Llano, San Juan Ixtayopan. Alcaldía Tláhuac, CDMX, C.P. 13508, Mexico;3. Facultad de Química, Universidad Autónoma de Querétaro, Santiago de Querétaro, C.P. 76010, Mexico;4. Tecnologico de Monterrey, School of Engineering and Sciences, Atizapán de Zaragoza, Estado de México, C.P. 52926, Mexico |
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| Abstract: | Palladium-based catalysts, such as PdSx/C and PdSex/C, have been developed as oxygen reduction catalysts for direct methanol fuel cells. Pd/C catalysts containing chalcogens have been synthesized and tested for oxygen reduction and the results have been analyzed based on changes in the palladium phase. Selenium addition to the catalyst promotes the oxygen reduction due to the modification of the palladium surface. However, sulfur reduces the oxygen reduction activity to a great extent as a result of semi-amorphous palladium phase formation. Both PdSx/C and PdSex/C are highly methanol tolerant. |
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